Station Overview Station Location
Station Number CO-LR-1100 Latitude 40.475646
Station Name Fort Collins 5.5 S Longitude -105.072121
County Larimer Elevation (ft) 5038



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 17 1.12 1.41 31 1.41 31 0.00 0 0 6 4 2.2 3 3
Nov 17 0.72 0.61 30 0.61 30 0.00 0 0 5 3 4.6 1 4
Dec 17 0.60 0.30 31 0.30 31 0.00 0 0 8 2 6.6 8 10
Jan 18 0.46 0.49 31 0.49 31 0.00 0 0 4 3 7.3 5 14
Feb 18 0.48 0.84 28 0.84 28 0.00 0 0 9 3 13.8 9 14
March 18 1.55 0.78 31 0.78 31 0.00 0 0 5 3 0.6 2 2
April 18 1.96 0.82 30 0.82 30 0.00 0 0 7 3 2.2 2 2
May 18 2.44 3.31 31 3.31 31 0.00 0 0 15 5 0.0 0 0
June 18 1.96 0.62 30 0.62 30 0.00 0 0 7 4 0.0 0 0
July 18 1.46 2.58 31 2.58 31 0.00 0 0 12 2 0.0 0 0
Aug 18 1.39 0.41 31 0.41 31 0.00 0 0 7 2 0.0 0 0
Sept 18 1.36 0.12 30 0.12 30 0.00 0 0 5 4 0.0 0 0
Water Year Totals: 15.50" 12.29" 365 days 12.29" 365 0.00" 0 days 0 90 days 38 days 37.3" 30 days 49 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2017 0.01
10/2/2017 0.34
10/3/2017 0.21
10/4/2017 T
10/5/2017 0.00
10/6/2017 T
10/7/2017 0.00
10/8/2017 0.00
10/9/2017 0.68
10/10/2017 0.16
10/11/2017 0.00
10/12/2017 0.00
10/13/2017 0.00
10/14/2017 0.00
10/15/2017 0.00
10/16/2017 0.00
10/17/2017 0.00
10/18/2017 0.00
10/19/2017 0.00
10/20/2017 0.00
10/21/2017 0.00
10/22/2017 0.00
10/23/2017 0.00
10/24/2017 0.00
10/25/2017 0.00
10/26/2017 0.00
10/27/2017 T
10/28/2017 0.00
10/29/2017 0.00
10/30/2017 T
10/31/2017 0.01
11/1/2017 0.00
11/2/2017 0.00
11/3/2017 0.00
11/4/2017 0.00
11/5/2017 T
11/6/2017 0.02
11/7/2017 0.46
11/8/2017 T
11/9/2017 0.00
11/10/2017 0.00
11/11/2017 0.00
11/12/2017 0.00
11/13/2017 0.00
11/14/2017 0.00
11/15/2017 0.00
11/16/2017 0.00
11/17/2017 0.00
11/18/2017 0.02
11/19/2017 0.00
11/20/2017 0.00
11/21/2017 0.09
11/22/2017 0.02
11/23/2017 0.00
11/24/2017 0.00
11/25/2017 T
11/26/2017 0.00
11/27/2017 0.00
11/28/2017 0.00
11/29/2017 0.00
11/30/2017 0.00
12/1/2017 0.00
12/2/2017 0.00
12/3/2017 0.00
12/4/2017 0.01
12/5/2017 0.00
12/6/2017 0.00
12/7/2017 0.00
12/8/2017 0.00
12/9/2017 0.00
12/10/2017 0.00
12/11/2017 0.00
12/12/2017 0.00
12/13/2017 0.00
12/14/2017 0.05
12/15/2017 0.00
12/16/2017 0.00
12/17/2017 T
12/18/2017 0.00
12/19/2017 0.00
12/20/2017 0.00
12/21/2017 0.05
12/22/2017 0.02
12/23/2017 0.00
12/24/2017 0.06
12/25/2017 0.00
12/26/2017 0.02
12/27/2017 T
12/28/2017 0.00
12/29/2017 0.00
12/30/2017 0.03
12/31/2017 0.06
Day of YearDaily PrcpMultiday Prcp
1/1/2018 T
1/2/2018 T
1/3/2018 0.00
1/4/2018 0.00
1/5/2018 0.00
1/6/2018 0.00
1/7/2018 0.00
1/8/2018 0.00
1/9/2018 0.00
1/10/2018 0.00
1/11/2018 T
1/12/2018 0.00
1/13/2018 0.00
1/14/2018 0.00
1/15/2018 0.03
1/16/2018 0.07
1/17/2018 0.00
1/18/2018 0.00
1/19/2018 0.00
1/20/2018 0.00
1/21/2018 0.17
1/22/2018 0.22
1/23/2018 0.00
1/24/2018 0.00
1/25/2018 0.00
1/26/2018 0.00
1/27/2018 0.00
1/28/2018 0.00
1/29/2018 0.00
1/30/2018 0.00
1/31/2018 0.00
2/1/2018 0.16
2/2/2018 0.03
2/3/2018 0.00
2/4/2018 T
2/5/2018 0.01
2/6/2018 0.00
2/7/2018 0.00
2/8/2018 0.00
2/9/2018 T
2/10/2018 0.10
2/11/2018 0.05
2/12/2018 T
2/13/2018 0.06
2/14/2018 0.00
2/15/2018 0.00
2/16/2018 0.00
2/17/2018 0.00
2/18/2018 0.00
2/19/2018 0.02
2/20/2018 0.25
2/21/2018 0.00
2/22/2018 0.00
2/23/2018 0.00
2/24/2018 0.16
2/25/2018 0.00
2/26/2018 0.00
2/27/2018 0.00
2/28/2018 0.00
3/1/2018 0.00
3/2/2018 0.00
3/3/2018 0.00
3/4/2018 0.00
3/5/2018 0.00
3/6/2018 0.00
3/7/2018 0.00
3/8/2018 0.00
3/9/2018 0.00
3/10/2018 0.00
3/11/2018 0.00
3/12/2018 0.00
3/13/2018 0.00
3/14/2018 0.00
3/15/2018 0.00
3/16/2018 0.16
3/17/2018 0.00
3/18/2018 0.00
3/19/2018 0.33
3/20/2018 T
3/21/2018 0.00
3/22/2018 0.00
3/23/2018 0.00
3/24/2018 0.01
3/25/2018 0.00
3/26/2018 T
3/27/2018 T
3/28/2018 0.00
3/29/2018 0.26
3/30/2018 0.02
3/31/2018 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2018 T
4/2/2018 0.00
4/3/2018 0.00
4/4/2018 0.00
4/5/2018 0.00
4/6/2018 T
4/7/2018 0.17
4/8/2018 0.00
4/9/2018 0.07
4/10/2018 T
4/11/2018 0.00
4/12/2018 0.00
4/13/2018 0.01
4/14/2018 0.00
4/15/2018 0.00
4/16/2018 0.00
4/17/2018 0.00
4/18/2018 0.00
4/19/2018 0.00
4/20/2018 0.00
4/21/2018 0.39
4/22/2018 0.06
4/23/2018 0.00
4/24/2018 0.11
4/25/2018 0.01
4/26/2018 0.00
4/27/2018 0.00
4/28/2018 0.00
4/29/2018 0.00
4/30/2018 0.00
5/1/2018 T
5/2/2018 0.01
5/3/2018 1.22
5/4/2018 0.56
5/5/2018 0.00
5/6/2018 T
5/7/2018 0.00
5/8/2018 0.00
5/9/2018 0.00
5/10/2018 0.00
5/11/2018 0.00
5/12/2018 0.16
5/13/2018 0.14
5/14/2018 0.30
5/15/2018 T
5/16/2018 0.05
5/17/2018 0.00
5/18/2018 0.00
5/19/2018 0.24
5/20/2018 0.09
5/21/2018 0.07
5/22/2018 0.00
5/23/2018 0.25
5/24/2018 T
5/25/2018 0.01
5/26/2018 0.00
5/27/2018 0.00
5/28/2018 T
5/29/2018 0.08
5/30/2018 0.01
5/31/2018 0.12
6/1/2018 0.00
6/2/2018 0.00
6/3/2018 0.00
6/4/2018 0.00
6/5/2018 0.00
6/6/2018 0.00
6/7/2018 0.01
6/8/2018 0.00
6/9/2018 0.00
6/10/2018 0.00
6/11/2018 0.00
6/12/2018 0.00
6/13/2018 0.00
6/14/2018 0.00
6/15/2018 T
6/16/2018 T
6/17/2018 0.10
6/18/2018 0.13
6/19/2018 0.04
6/20/2018 0.08
6/21/2018 0.00
6/22/2018 T
6/23/2018 0.00
6/24/2018 0.07
6/25/2018 0.19
6/26/2018 0.00
6/27/2018 0.00
6/28/2018 T
6/29/2018 0.00
6/30/2018 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2018 1.09
7/2/2018 0.00
7/3/2018 0.00
7/4/2018 T
7/5/2018 0.34
7/6/2018 0.00
7/7/2018 0.00
7/8/2018 0.00
7/9/2018 0.00
7/10/2018 0.00
7/11/2018 0.00
7/12/2018 0.00
7/13/2018 0.12
7/14/2018 0.00
7/15/2018 0.00
7/16/2018 0.36
7/17/2018 0.00
7/18/2018 0.03
7/19/2018 0.00
7/20/2018 0.00
7/21/2018 0.00
7/22/2018 T
7/23/2018 0.01
7/24/2018 0.16
7/25/2018 0.00
7/26/2018 0.20
7/27/2018 0.03
7/28/2018 0.02
7/29/2018 0.12
7/30/2018 0.10
7/31/2018 0.00
8/1/2018 0.00
8/2/2018 0.00
8/3/2018 0.00
8/4/2018 T
8/5/2018 0.04
8/6/2018 0.01
8/7/2018 0.01
8/8/2018 T
8/9/2018 0.00
8/10/2018 0.00
8/11/2018 0.00
8/12/2018 0.00
8/13/2018 0.00
8/14/2018 0.00
8/15/2018 0.10
8/16/2018 0.00
8/17/2018 0.00
8/18/2018 0.00
8/19/2018 0.23
8/20/2018 0.01
8/21/2018 0.00
8/22/2018 0.01
8/23/2018 0.00
8/24/2018 0.00
8/25/2018 0.00
8/26/2018 0.00
8/27/2018 0.00
8/28/2018 0.00
8/29/2018 0.00
8/30/2018 0.00
8/31/2018 0.00
9/1/2018 0.02
9/2/2018 0.00
9/3/2018 0.00
9/4/2018 0.00
9/5/2018 0.03
9/6/2018 T
9/7/2018 0.02
9/8/2018 0.00
9/9/2018 0.00
9/10/2018 0.00
9/11/2018 0.00
9/12/2018 T
9/13/2018 0.00
9/14/2018 0.00
9/15/2018 0.00
9/16/2018 0.00
9/17/2018 0.00
9/18/2018 0.00
9/19/2018 0.00
9/20/2018 0.04
9/21/2018 0.00
9/22/2018 0.00
9/23/2018 0.00
9/24/2018 0.00
9/25/2018 0.01
9/26/2018 0.00
9/27/2018 0.00
9/28/2018 0.00
9/29/2018 T
9/30/2018 T



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Brief, gusty shower/light squall around 5:00pm MDT.
10/2/2017 7:00 AM 0.34 0.0 0.00 0.0 0.00 -SHRA 10:30-10:45am MDT, occasional -TSRA 2:30-4:15pm, SHRA 12:30-2:00am, -RA 4:30 to 7:00am observation.
10/3/2017 7:00 AM 0.21 0.0 0.00 0.0 0.00 First frost and first freezing temperature of the season on 3 Oct. Moderate rain from the 2 Oct morning observation (7:00am MDT) tapering to showers by mid-morning (~10:30am), then a low overcast through midday with occasional drizzle. Another round of rain showers 3:30-6:00pm. Some wet snowflakes mixed in on my drive home from NW Fort Collins, but no snow at station. Unusually cold, with a 10/2 midnight-midnight high temperature of 46.8F at 2:00am (daytime high temperature 41.8F at 12:50pm) and a 10/3 morning low temperature of 30.4F at 7:00am observation time.
10/4/2017 7:00 AM T 0.0 0.00 0.0 0.00 Fog and heavy mist between about 7:30-9:00am MDT left a trace in the rain gauge.
10/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Very dense fog with visibility less than 0.1 miles (a few hundred feet) this morning produced a "heavy" trace in the gauge this morning, but no precipitation fell.
10/6/2017 7:00 AM T 0.0 0.00 0.0 0.00 Dense fog and mist from the 10/5 7:00am observation through 9:00am.
10/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/8/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Mild and sunny on 7 Oct 2017. 24-hour high temperature 73F, low temperature 36F (7 Oct).
10/9/2017 7:00 AM 0.68 1.3 0.39 1.0 0.39 A cloudless sky through 4:00pm MDT, then rapidly increasing clouds and becoming overcast by 6:00pm. Cold front passed through around 5:30pm shifting winds from SSE to N. Light to moderate rain began around 6:30pm and mixed with and changed to all snow by ~10:30pm. Light to moderate snow continued through the morning observation. Ground temperatures still quite warm, and almost no snow accumulated on paved surfaces. Visibility at observation 4 miles.
10/10/2017 7:00 AM 0.16 0.8 0.16 0.5 0.09 Light snow from the 7:00am observation to 12:00pm, then remaining mostly cloudy and cold. A 5:1 snow-to-liquid ratio was used as the snow on the snow board had melted by the afternoon. Melted value from new snow core equals total liquid precipitation because all precipitation fell as snow. Total snow core currently being melted and will be added this evening. High/low temperature on 9 Oct was 40F/29F. Temperature at 10 Oct 7:00am observation 24F.
10/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Gusty winds from midday through the afternoon. Peak gust on 15 Oct 2017 was 42 mph and 24-hr average speed was 5.9 mph.
10/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/22/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Strong WNW winds from sunrise through late afternoon on 21 Oct 2017. Peak wind gust 42 mph from the NW at 8:30am, with 10-minute sustained winds of 19 mph between about 8:30-9:00am. 24-hr average wind speed 7.0 mph.
10/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Pre-frontal gusty downslope winds and rapidly changing temperatures overnight. Wind-dependent temps dropped into upper 40s during the evening but then spiked back up to the low 60s at times overnight, peaking at 61.6F at 4:10am. Peak wind gust 31 mph from NNW at 5:20am. Front passed through at 6:20am as winds shifted from NW to NE. Temp dropped from 62F at 6:00am to 42F by 8:00am. The not-unfamiliar delayed cold front passage in Fort Collins, where areas north and south of the city (Wellington, Longmont) already experienced temps in the 40s and easterly winds at 6:00am.
10/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Daytime high on 23 Oct was 54F after cold front passed through around 7:00am.
10/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/26/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Record-breaking warmth and a large temperature range on 25 Oct 2017. High temp 84.6F at 3:40pm, low temp 31.8F at 7:40am, resulting in a 53F daily temperature range! Westerly downslope wind gusts to 30 mph kept temperatures above 70F until 8:40pm.
10/27/2017 7:00 AM T T T T T Dramatic 24 hour drop in temperature: between 4:50pm on 10/25 and 4:50pm 10/26, the temperature fell 48F from 82F (and sunny) to 34F (with snow showers). During the time window the "apparent" temperature fell by 55F from 82F to 27F! Scattered very light rain showers began around 1:00pm MDT, quickly changed to snow showers, and then tapered to flurries by 5:00pm. No snow accumulation on the ground due to combination of a very warm ground and very light precipitation.
10/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/30/2017 7:00 AM T T T T T After a warm afternoon on 29 Oct 2017, an intense cold front made its way through Fort Collins around 4:25p MDT with a wind shift from SE to NE and much cooler air. Peak wind gust was 30 mph from ENE at 4:30pm (sustained 10-minute winds were 17 mph at this time). The temperature dropped from 75F at 4:20pm (daytime high) to 53F at 6:20pm. Light snow showers began around 5:30am and continued through the morning observation.
10/31/2017 7:00 AM 0.01 0.1 0.01 0.1 0.01 Occasional -SHSN from the 7:00am (30 Oct) observation through mid-morning, then remaining cloudy. -SHSN 4:00-4:30am, then -SN 4:30-5:15am.
11/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Moderately strong winds during the afternoon and warm temperatures. Max temp on 11/1 was 72F at 3:40pm. Peak wind gust 32 mph at 1:50pm from SW.
11/3/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/4/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/5/2017 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA 4:10-4:40am, 6:15-6:30 MST.
11/6/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Occasional -DZ and -SHRA through the morning, the a period of -RA around 2:15-2:45pm MST. One or two peaks of sun in the afternoon and evening.
11/7/2017 7:00 AM 0.46 4.6 0.46 5.0 0.46 Occasional -RA 7:45-11:00pm MST, then a steady light to moderate snow from 12:00-6:00am tapering to flurries by the 7:00am observation. Light NE winds shifting to ESE by dawn. Temperatures during snowfall in the mid-20s F.
11/8/2017 7:00 AM T T T 4.0 0.36 -SHSN from 7:00am observation to about 7:30am, and again from 1:00-2:30pm, otherwise a low overcast with light freezing fog and occasional flurries throughout the day. Freezing fog with visibility as low as 0.50 mi from 5:00am to the 7:00am observation.
11/9/2017 7:00 AM 0.00 0.0 0.00 1.5 0.21
11/10/2017 7:00 AM 0.00 0.0 0.00 0.5 0.22
11/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Very warm and becoming windy during the period. High temperature 71.7F on 16 Nov 2017 with moderate SW winds. Overnight, increasing WSW winds (peak 10-minute sustained wind 18 mph with max gust 32 mph at 5:10am MST) and warm temperatures hovering around 55-60F.
11/18/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Windy and mild overnight (low temperature on the morning of 17 Nov 2017 was 52.4F). High temperature 65.7F at 11:30am MST, then a strong FROPA at 1:00pm and wind shift from WSW to N. Continued windy through the afternoon, with 10-minute sustained winds 10-15 mph past midnight and a peak gust of 33 mph at 4:10pm. Scattered -SHRA 4:00-6:30pm, with a very brief period of graupel observed around 5:10pm. Temperature at 18 Nov 07:00 observation 27F with light winds.
11/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/21/2017 7:00 AM 0.09 0.0 0.00 0.0 0.00 RA between 6:40-8:20am MST. Warm with periods of strong winds during the day on 20 November: High temperature 69.7F with moderate, variable winds in the morning becoming strong from the WSW in the afternoon and then gradually shifting to the NE by dawn. Peak gust on 20 November was 31 mph from the SW at 5:00pm. Peak gust overnight was 36 mph from the NW at 12:10am, with 10-minute sustained winds up to 17 mph.
11/22/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 -RA from 7:00-8:00am and occasional SHRA 10:30am-12:00pm on 21 November 2017. Gradual clearing afterward, with heavy dew and some mist overnight. Gusty winds likely caused some undercatch of the rainfall over the past 48 hrs: tipping bucket rain gauge measured 0.15" compared to CoCoRAHS reading of 0.11".
11/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/25/2017 7:00 AM T 0.0 0.00 0.0 0.00 Partly cloudy and unseasonably warm with a light breeze through 1:00pm MST, then becoming very windy. High temperature: 72F. Frontal passage around 1:00pm with winds shifting to WNW and becoming strong, with sustained 10-minute winds up to 24 mph and a peak gust of 46 mph at 3:20pm. Winds remained strong to sunset, then weakened. Strong winds likely mixed down to surface thanks to dissipating rain showers, and a few sprinkles reached the ground around 3:15-3:45pm.
11/26/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/27/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued unseasonably warm on 26 Nov: high temperature 68.1F.
11/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Record-breaking warmth yesterday. High temperature 74.9F at 1:50pm MST. Windy at times, with pre-frontal westerlies sustained (10 minute) at 15 mph gusting to 28 mph during the afternoon. A cold front passed through around 10:15pm with a shift to northerly winds, sustained at 16 mph gusting to 29 mph. No precipitation observed.
11/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/30/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/3/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/4/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 One or two gusty SHRA between 10:30-11:20pm MST. FROPA around 9:30pm on 3 Dec, with west winds gusting to 36 mph before the frontal passage and WNW winds gusting to 38 mph after the frontal passage (max 10-minute sustained winds 17 mph numerous times throughout the night). Unseasonably warm with a 12/3 high temperature of 60F.
12/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/8/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/10/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/14/2017 7:00 AM 0.05 1.1 0.05 1.0 0.05 Light snow between approximately 10:30pm MST (14 Dec 2017) and 3:30am.
12/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/17/2017 7:00 AM T T T T T Light freezing drizzle and snow grains from approximately 12:00am to 3:30am MST. A thin glaze of ice accumulation (roads mostly just wet).
12/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/21/2017 7:00 AM 0.05 1.2 0.05 1.0 M New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/22/2017 7:00 AM 0.02 0.2 0.02 1.0 M New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/23/2017 7:00 AM 0.00 0.0 0.00 0.5 M Existing snow depth estimated from nearby reports.
12/24/2017 7:00 AM 0.06 1.3 0.06 2.0 M Quite cold: low this morning at observation -3.1F. New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/25/2017 7:00 AM 0.00 0.0 0.00 1.5 M Existing snow depth estimated from nearby reports.
12/26/2017 7:00 AM 0.02 0.4 0.02 2.0 M New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/27/2017 7:00 AM T 0.1 T 2.0 M Very cold: high/low temperatures on 26 Dec 2017 only 11F/5F. New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/28/2017 7:00 AM 0.00 0.0 0.00 T T Excellent example of the effects of downslope warming on 27 Dec: after a morning low temperature of 3.1F, strong westerly winds scoured out the cold air and resulted in a high temperature of 50.6F, making the temperature range 47.5F. The following rapid temperature increases were observed: 10 minutes: 17.5F, from 12:20pm MST (29.6F) to 12:30pm (47.1F) 20 minutes: 29.1F, from 12:10pm (18.0F) to 12:30pm (47.1F) 60 minutes: 31.6F, from 12:00pm MST (17.0F) and 1:00pm (48.6F) Peak gust 38 mph. Existing snow depth and its liquid amount estimated from nearby reports.
12/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/30/2017 7:00 AM 0.03 0.7 0.03 0.5 M Dramatic temperature range on 29 Dec 2017. After a morning low 18.6F, the temperature rose to 69.6F during the afternoon (12:30pm MST) with moderate SE-->SW winds and then plummeted to 11.4F by midnight after a cold front passed through, resulting in a 29 Dec 2017 temperature range of 58.2F. During the frontal passage, the temperature dropped 27.4F in 60 minutes, from 64.9F at 3:40pm to 37.5F at 4:40pm. The temperature continued to fall into the low 20s by 7:00pm as snow developed (a few tenths of an inch accumulated before midnight) and wind chills dropped to below 0F. Peak wind gust 30 mph from E. New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
12/31/2017 7:00 AM 0.06 1.6 0.06 2.0 M New snowfall and existing snow depth estimated from nearby reports. Liquid equivalent precipitation (rain and melted frozen precipitation) reconstructed from tipping bucket readings.
1/1/2018 7:00 AM T 0.2 T 1.5 0.03
1/2/2018 7:00 AM T T T 1.0 0.02 Occasional -SHSN in the morning, sunny at times with a few flurries in the afternoon. Very frosty this morning (low 6F).
1/3/2018 7:00 AM 0.00 0.0 0.00 T T
1/4/2018 7:00 AM 0.00 0.0 0.00 T T
1/5/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/6/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/7/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Very mild: high temperature 66.2 at 2:20pm.
1/11/2018 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA 11:00-11:30am MST, 2:15-2:45pm. Rainfall in January, without snowfall, is rare for Fort Collins. High temperature 52 F.
1/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/13/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/15/2018 7:00 AM 0.03 0.4 0.03 0.4 0.03 Light snow, occasionally of moderate intensity, from approximately 3:00am to the 7:00am MST observation and continuing. Light winds.
1/16/2018 7:00 AM 0.07 2.5 0.07 1.5 0.02 Steady, fluffy snow, mostly light to moderate but at times heavy between the 7:00am MST observation and 12:00pm. A brief period of snow grains mixing with the snowflakes mid-morning. Rapidly becoming mostly clear during the afternoon and overnight with frigid temperatures: low this morning -6 F. [Snow depth core currently being melted.]
1/17/2018 7:00 AM 0.00 0.0 0.00 1.0 0.01
1/18/2018 7:00 AM 0.00 0.0 0.00 T T
1/19/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/20/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/21/2018 7:50 AM 0.17 2.0 0.13 2.0 0.13 Light snow, mixed with snow grains and freezing drizzle, from approximately 7:00pm MST on 20 Jan to 12:00am 21 Jan, then steady light to moderate snow. A glaze of freezing drizzle accumulated to approximately 0.05". Not particularly cold during the snowfall, with temperatures overnight in the middle to high 20s F. Moderate ENE breezes shifting to N breezes after 4:00am. Steady light snow and breezy at time of 21 Jan observation.
1/22/2018 7:00 AM 0.22 2.2 0.22 3.5 0.34 Steady snow between the 21 Jan morning observation and tapering off at around 4:30pm MST. The snow was generally of light intensity, but was occasionally moderately intense from late morning through early afternoon. Breezy, with brisk north sustained winds of 5-10 mph and peak gust to 19 mph during the afternoon. Modest blowing snow, negligible drifts. Fine snow flakes made snow quite dense but not wet. [Snow depth core being melted and will be added this afternoon.]
1/23/2018 7:00 AM 0.00 0.0 0.00 3.0 0.31
1/24/2018 7:00 AM 0.00 0.0 0.00 2.5 0.28
1/25/2018 7:00 AM 0.00 0.0 0.00 2.5 0.31
1/26/2018 7:00 AM 0.00 0.0 0.00 2.5 0.34 Becoming breezy after 9:00pm MST, with temperatures hovering in the low 40s F most of the night but dipping down to 29F at 5:50am. Winds gusting to 28 mph (10-minute sustained winds up to 14 mph).
1/27/2018 7:00 AM 0.00 0.0 0.00 2.0 0.24 Breezy during the daytime, with WNW winds gusting to 30 mph (max 10-minute sustained wind 15 mph on multiple occasions). Local secondary road conditions hard-packed ice.
1/28/2018 7:00 AM 0.00 0.0 0.00 1.5 0.26
1/29/2018 7:00 AM 0.00 0.0 0.00 0.5 0.17
1/30/2018 7:00 AM 0.00 0.0 0.00 T T Warm temperatures on 29 Jan (56F) melted much of the snow on the ground.
1/31/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/1/2018 6:20 AM 0.16 3.0 0.16 3.0 0.16 Steady light snow overnight. Snow began as snow grains around 9:00pm and changed to all snow soon after. Light snow at 1 Feb morning observation. Light winds.
2/2/2018 7:00 AM 0.03 0.5 0.03 2.0 0.13 Light snow from morning observation (6:20am MST 1 Feb) gradually tapering to flurries by late morning and ending soon after. [Snow depth core currently melting and will be entered later today.]
2/3/2018 7:00 AM 0.00 0.0 0.00 T T Occasionally gusty northwest winds to 26 mph overnight caused temperatures to rise from the 20s around midnight into the mid 40s F by dawn.
2/4/2018 7:00 AM T T T T T Warm with light winds in the morning, becoming windy in the afternoon and remaining mild. Peak wind gust 34 mph from the W at 3:10pm MST (max 10-min sustained wind 16 mph around the same time). Max temperature 56F. Cold frontal passage at 3:00am with abrupt wind shift to ENE and sharply colder temperatures dipping down into the low teens. Freezing drizzle, flurries, and light snow showers from 2:00am through the 7:00am observation. A very light glaze of freezing drizzle observed (0.03").
2/5/2018 7:00 AM 0.01 0.1 T 0.0 0.00 Light snow showers gradually tapering to flurries by midday, then remaining cloudy and cold with light winds. Daytime high temperature 22F. Strong, gusty winds developed overnight around 4:15am MST, with temperatures rising rapidly from 21F to 48F in one hour (3:30-4:30am) and from 30F to 45F in 10 minutes (4:10-4:20am). Strong NW winds gusting to 45 mph (6:20am and earlier times) and maximum 10-minute sustained winds peaking at 23 mph (4:30am). A brief squall of rain showers 6:10-6:40am.
2/6/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Windy and mild on 5 Feb. Calendar-day average wind speed 7.9 mph with peak gust to 45 mph at 6:10am MST. Max temp 55F around noon, then rapid cooling and wind shift from WNW to ESE as a weak cold front backing into the region from the east.
2/7/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/9/2018 7:00 AM T T T 0.0 0.00 Warm and windy on 8 Feb, with a high temperature of 60.3F and westerly wind gusts peaking at 33 mph in the evening. Remaining mild and windy overnight (49F at 3:00am MST), then a strong push of shallow cold air on easterly winds abruptly dropped temperatures into the 20s F by 4:00am. A few flurries and snow grains after 5:00am, with patchy freezing fog at the 7:00am observation (no glaze... yet).
2/10/2018 8:10 AM 0.10 1.7 0.10 1.5 0.10 Persistent light snow throughout the period, occasionally of moderate intensity especially around sunset on 9 Feb and between 5:00 and this morning's observation (10 Feb). SE to NE winds less than 15 mph. Very fluffy snow.
2/11/2018 7:00 AM 0.05 0.7 0.05 2.0 0.12 Light to moderate snow through late morning, then gradually tapering to flurries and ending by sunset. Becoming clear and cold overnight with light winds (low temperature -2.4F).
2/12/2018 7:00 AM T T T 1.0 0.09 Light flurries beginning around 5:45am MST and continuing through the 12 Feb observation.
2/13/2018 7:00 AM 0.06 0.9 0.06 2.0 0.16 Flurries and -SHSN throughout the day. A brief period of moderate to heavy snow between 7:00-7:45pm MST.
2/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 After a cold start to the day (9F), becoming warm and windy. High temperature 55F on 13 Feb, but remained in the 40s to near 50F overnight with strong WSW winds gusting to 36 mph (10-minute sustained winds up to 20 mph and above 15 mph for 5 consecutive hours).
2/15/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Very warm and continued windy. High temperature 62F on 14 Feb, with a daily averaged wind speed 11.8 mph from WSW. Peak wind gust 38 mph and maximum 10-minute sustained wind speed of 20 mph at 4:50am and 2:00pm.
2/16/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Clear and calm, then becoming windy and milder overnight with strong NW winds gusting to 32 mph. Temperatures rising to the mid-30s F by midnight.
2/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued warm, windy, and dry. A mild start to the day with the 17 Feb low temperature 34F rising to 57F in the afternoon. Moderate SE winds around midday shifting to SW in the evening and becoming strong overnight. Max 10-min sustained winds 22 mph (4:00am on 18 Feb) from SW and gusts to 41 mph at 4:50am. The wind woke us up last night!
2/19/2018 7:00 AM 0.02 1.4 0.02 1.5 0.02 After a very warm, windy, and dry day, a strong cold front plowed through around 6:30pm MST. High temperature 65.9F and peak wind gust 41 mph on 18 Feb. Sustained winds approximately 15 mph throughout the daytime hours. Light snow and freezing drizzle began around 11:00pm and continued through the 19 Feb morning observation. Snow is extremely dry and airy.
2/20/2018 7:00 AM 0.25 3.8 0.25 4.5 0.25 Steady -SN from 19 Feb 7:00am MST observation through about 4:00pm, then SN to +SN with visibilities dropping to 0.25 mile at times from 4:00-8:00pm. Some settling of snow overnight (I measured 4.8 inch total depth at 9:00pm). Clearing and very cold overnight, with minimum temperature –7.4F and wind chills around –15F to –20F. Temperature at observation –5F.
2/21/2018 7:00 AM 0.00 0.0 0.00 3.0 0.26
2/22/2018 7:00 AM 0.00 0.0 0.00 2.5 0.25
2/23/2018 7:00 AM 0.00 0.0 0.00 2.5 0.21
2/24/2018 7:00 AM 0.16 1.7 0.15 4.0 0.45 -SN developing around 4:45pm MST, then becoming a period of +SN between 5:00-6:00pm, then -SN 6:00-9:00pm.
2/25/2018 7:00 AM 0.00 0.0 0.00 3.0 0.37
2/26/2018 7:00 AM 0.00 0.0 0.00 2.0 0.42
2/27/2018 7:00 AM 0.00 0.0 0.00 T T
2/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/1/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/4/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/5/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Warm and very dry with increasing west winds during the afternoon. Relative humidity dipping to 8%, and peak wind gust of 33 mph at 5:00pm MST (max 10-min sustained wind 17 mph).
3/6/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Dry with very strong westerly winds on 5 March. Peak gust 44 mph at 1:40pm MST, maximum 10-minute sustained winds 23 mph from W at 1:00pm, 1-hour sustained wind of 21.8 mph between 1:00-2:00pm, and 24-hour average wind 13.3 mph. 10-minute sustained winds exceeded 10 mph for more than 14 consecutive hours and exceeded 20 mph for 100 consecutive minutes.
3/7/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/13/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/15/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/16/2018 7:00 AM 0.16 0.0 0.00 0.0 0.00 Mild with moderate WNW breezes during the afternoon shifting to N at 7:00pm MDT. Isolated -SHRA from 4:00-8:00pm, then steady -RA from 8:00-9:45pm MDT and ending around 11:00pm.
3/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/19/2018 7:00 AM 0.33 0.1 0.10 0.1 0.10 Moderate rain and snow in the evening: -SHRA 3:30-5:00pm MDT, RA 5:00-6:00pm, RASN 6:00-6:20pm, SN 6:20-7:30pm, then RASN 7:30-10:15pm. Snow on snow board was incredibly slushy and water-logged. Snow accumulated only on grass, not roads.
3/20/2018 7:00 AM T T T 0.0 0.00 Isolated snow showers during the late afternoon.
3/21/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/22/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/23/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/24/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 Gusty -SHRA 11:00am-12:00pm MDT, in the mid-afternoon, and again 8:30-9:00pm on 23 March. Peak wind gust 37 mph around 3:15pm (max 10-minute sustained wind 19 mph at the same time). Heavy frost and dew this morning.
3/25/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/26/2018 7:00 AM T 0.0 0.00 0.0 0.00 Intermittent -SHRA 5:30-8:00pm MDT.
3/27/2018 7:00 AM T 0.0 0.00 0.0 0.00 Isolated rain showers 5:00-11:00pm.
3/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/29/2018 7:00 AM 0.26 0.5 0.16 0.5 0.16 Cloudy, then -RA developing around 12:00pm MDT. Precipitation changed to snow around 2:30pm and was moderate to heavy at times through 5:00pm, then tapered to occasional rain/snow showers through about 11:00pm. Very dense fog on this morning (29 March) with visibility less than 1/4 mile from about 5:30-8:00am. New snow on snow board measured on the evening of 3/28 because melting was imminent. Total snow inferred from new snow and 3/28 evening measurement.
3/30/2018 7:00 AM 0.02 T T 0.0 0.00 Light rain and snow showers between 1:30-3:30pm MDT.
3/31/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/1/2018 7:00 AM T T T T T -SHSN mainly 5:30-6:15am MDT.
4/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Warm yesterday (high 72.9F) with strong northerly winds overnight. Peak gust 33 mph at 3:10am.
4/4/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/5/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Windy during the afternoon: 10-min sustained wind 18 mph with gusts to 35 mph, both from WSW.
4/6/2018 7:00 AM T 0.0 0.00 0.0 0.00 Very light rain showers 9:00-10:15pm MDT.
4/7/2018 7:00 AM 0.17 1.5 0.14 1.5 0.14 Light snow began around 7:30am MDT on 6 April and continued through the daytime hours as temperatures dropped from the mid-30s F to the mid-20s F. Northeast winds gusting to 25 mph during late morning. 1.2" of new snow (0.13" liquid equivalent) measured on the evening of 6 April, with another 0.3" of additional accumulation overnight. Initial snow melted on contact with ground. Very cold temperatures: 7:00am-7:00am high temperature 35F, but afternoon temperatures were 23-25F. Low temperature 20.8F on 7 Apr.
4/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/9/2018 7:00 AM 0.07 0.0 0.00 0.0 0.00 -RA between 5:20-7:00am MDT. No wet snow observed.
4/10/2018 7:00 AM T 0.0 0.00 0.0 0.00 Very light -SHRA 7:00-8:00am MDT on 9 April.
4/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Warm yesterday and overnight. High temperature on 10 April was 72F, and the overnight low was an unusually mild 47F.
4/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Unusually warm with moderate to strong WSW winds. High temperature on 11 April was 80F. Maximum 10-minute sustained wind 17 mph from the SW in late morning, peak gust on 11 April was 34 mph from SW.
4/13/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 Unusually warm with a strong frontal passage and a brief gusty rain shower and soft hail in the evening followed by increasing NNW winds. High temperature on 12 April was 78.3 F. Gusty rain showers from 8:40-9:40 pm MDT with what appeared to be soft hail between 9:10-9:25 pm. At that time, the air temperature was about 52F and a convective cell moved from south to north across the location according to radar. The hail was something like a very dense snowflake, not pellet-like or granular.
4/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued windy all day but dry. Daily averaged wind speed on 13 April was 11.4 mph from the north, maximum 10-minute sustained wind was 17 mph from NNW and NW in the morning and early afternoon, and maximum wind gust was 36 mph on two separate occasions from the WNW and NW.
4/15/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Daily averaged wind speed on 14 April was 8.4 mph (N) with a peak gust to 33 mph also from the north. The strongest 10-minute sustained wind was 15 mph from NNW.
4/16/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Extreme winds on 17 April. After a calm morning, strong W to WNW winds began around 10:40am MDT and continued to about 11:00pm and periodically returned overnight. 10-minute sustained winds hovered around 20 mph between 1:00-6:00pm, with a peak gust on two occasions to 51 mph from the W between 3:15-3:30pm. Daily averaged wind speed of 8.2 mph was recorded on 17 April. Isolated gusty rain (and later snow) showers were noted in the vicinity but none observed at the station.
4/19/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/20/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/21/2018 7:00 AM 0.39 0.7 0.23 0.5 0.23 -RA beginning around 4:45pm MDT and changing to wet -SN (SN at times) at about 8:30pm with steady -SN and SN to 2:30am. SN returned 6:00-7:00am, with moderate snow and 0.75 mile visibility at the time of observation.
4/22/2018 7:00 AM 0.06 T T T T SN gradually tapering to -SN and ending around 11:00am MDT. Snow accumulated early in the day but was fully melted by around 12:00pm. Dense freezing fog on the morning of 22 April from about 5:00am to the 7:00am observation.
4/23/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/24/2018 7:00 AM 0.11 T T 0.0 0.00 -TSRA with lightening visible and light sprinkles around 5:00-5:30pm MDT, then -RA 2:00-3:30am, -RASN estimated from 3:30-4:15am, and -RA 6:30am to the 7:00am observation.
4/25/2018 7:00 AM 0.01 T T 0.0 0.00 -RA with a few snow flurries mainly from 7:00am-12:00pm.
4/26/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/27/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/29/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/30/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/1/2018 7:00 AM T 0.0 0.00 0.0 0.00 -TSRA 5:45-6:15pm MDT and again 7:20-7:50pm.
5/2/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 -RA 8:00-9:00am MDT, then isolated -TSRA with sprinkles around 7:00pm.
5/3/2018 6:20 AM 1.22 0.0 0.00 0.0 0.00 A nice soaker, a rare case where the inner gauge tube was full! -RA 8:30-11:30am MDT, then -RA and occasional RA from 5:00pm to the 6:20am observation, heaviest between 6:45-10:00pm and 5:00-6:00am. Areas of ponding on roads.
5/4/2018 7:00 AM 0.56 0.0 0.00 0.0 0.00 A steady -RA through noon, then partial clearing in the afternoon with occasional showers.
5/5/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/6/2018 7:00 AM T 0.0 0.00 0.0 0.00 Very light -SHRA around 3:30pm MDT.
5/7/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/12/2018 7:00 AM 0.16 0.0 0.00 0.0 0.00 Steady -RA 10:45pm-12:00am MDT, then intermittent -SHRA, -DZ, and mist through the morning observation. Visibilities reduced to less than 1 mi this morning.
5/13/2018 7:00 AM 0.14 0.0 0.00 0.0 0.00 -RA and mist from 7:00am MDT observation to around noon, then cloudy. -TSRA and -RA from 7:00pm overnight until the 13 May 7:00am observation.
5/14/2018 7:00 AM 0.30 0.0 0.00 0.0 0.00 Drizzle and mist in the early morning, then occasional thundershowers, sometimes heavy, from 4:00-9:45pm MDT.
5/15/2018 7:00 AM T 0.0 0.00 0.0 0.00 -DZ and mist through about 9:00am, then a brief gusty -TSRA around 4:15pm.
5/16/2018 7:00 AM 0.05 0.0 0.00 0.0 0.00 TSRA 10:30-10:50pm MDT on 15 May.
5/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/19/2018 7:00 AM 0.24 0.0 0.00 0.0 0.00 TSRA around 5:30pm, heaviest rain between 5:30-5:40 along with pea-sized hail (no special report). -RA 6:00-7:00am on 19 May.
5/20/2018 7:00 AM 0.09 0.0 0.00 0.0 0.00 A dreary day: occasional -RA all day, especially before 10:00am MDT and after 10:30pm.
5/21/2018 7:00 AM 0.07 0.0 0.00 0.0 0.00 -RA 7:00-8:00am MDT, then -RA and occasional RA 5:45-6:30pm. Otherwise, overcast skies.
5/22/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/23/2018 7:00 AM 0.25 0.0 0.00 0.0 0.00 Two rounds of storms, fortunately we avoided large hail. TSRA 5:45-6:15pm MDT, pea-sized hail 5:55-6:00pm (no damage, no special report). TSRA again from 7:50-8:30pm.
5/24/2018 7:00 AM T 0.0 0.00 0.0 0.00 Brief -SHRA around 5:45pm MDT.
5/25/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 -TSRA around 5:00pm MDT.
5/26/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/27/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/28/2018 7:00 AM T 0.0 0.00 0.0 0.00 Brief -TSRA around 11:15pm MDT on 27 May.
5/29/2018 7:00 AM 0.08 0.0 0.00 0.0 0.00 Gusty TSRA 4:45-5:30pm MDT. Very brief period of rice-sized hail around 5:00pm during heaviest rainfall.
5/30/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 SHRA 11:20-11:40am MDT and 1:50-2:15pm.
5/31/2018 7:00 AM 0.12 0.0 0.00 0.0 0.00 +TSRA 5:25-5:45pm MDT. Heavy rain during thunderstorm with CG lightning in close proximity to north of station. Light winds during the storm. Heaviest rains fell with sunshine, which was odd. Exceptional lingering anvil cloud with well-defined boundary overhead and to west for 1 hour following storm, as well as awesome mammatus deck to east in storm wake.
6/1/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/4/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/5/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/6/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/7/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 -TSRA 9:30-10:00pm MDT.
6/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Haze and elevated smoke from western Colorado wildfires this morning, dissipating by noon. No smoke smell on ground.
6/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Light haze and slight smoke smell this morning from western Colorado wildfires.
6/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/13/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/15/2018 7:00 AM T 0.0 0.00 0.0 0.00 Brief but very gusty -TSRA around 4:10-4:20 pm MDT. Maximum 10-minute sustained winds reached 16 mph from the WNW with a peak gust of 41 mph from W. Small branches down, otherwise no damage. Temperature dropped from 96F to 79F.
6/16/2018 7:00 AM T 0.0 0.00 0.0 0.00 Very brief -TSRA 2:15-2:25pm MDT.
6/17/2018 7:00 AM 0.10 0.0 0.00 0.0 0.00 Generally -RA from 2:20-4:45pm MDT, with a heavier shower around 3:00pm.
6/18/2018 7:00 AM 0.13 0.0 0.00 0.0 0.00 Mostly cloudy in the morning, then occasional -SHRA during the afternoon. Most of the accumulating rain occurred between 6:15pm-3:00am MDT. -DZ with a low overcast sky during the morning observation. High temperature only 70.8F on 17 June.
6/19/2018 7:00 AM 0.04 0.0 0.00 0.0 0.00 -DZ during the 18 June morning observation, dissipating by 8:00am. -TSRA 5:50-6:10pm MST on 18 June. Thunder in vicinity for most of the late evening and overnight.
6/20/2018 7:00 AM 0.08 0.0 0.00 0.0 0.00 TSRA 5:30-6:30pm MDT. No hail.
6/21/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/22/2018 7:00 AM T 0.0 0.00 0.0 0.00 -TSRA 5:55-6:15pm.
6/23/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/24/2018 7:00 AM 0.07 0.0 0.00 0.0 0.00 TSRA 11:30-11:55pm MDT, and again 2:00-2:35am. SHRA 4:30-4:45am.
6/25/2018 7:00 AM 0.19 0.0 0.00 0.0 0.00 -TSRA 11:00am-12:00pm MDT, -TSRA 1:15-2:40pm with +TSRA 1:30-1:45pm. Otherwise, unseasonably cool with scattered -SHRA and -TSRA throughout the afternoon. High temperature on 25 June was 67F, with a 2:00pm MDT reading of 56.9F.
6/26/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/27/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Hot and dry. High temperature on 26 June was 95F, low 51F.
6/28/2018 7:00 AM T 0.0 0.00 0.0 0.00 Brief -TSRA around 6:00pm MDT on 27 June.
6/29/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Record heat with damaging wind in the evening. Maximum/minimum temperature 100.7F/59.5F on 28 June 2018. Very gusty outflow from a rapidly weakening thundershower that moved ENE across Berthoud and southern Loveland resulted in a 49 mph wind gust from the south at approximately 6:25pm MDT. A healthy 14-ft fruit tree in the neighbor's yard across the street was knocked down, and many small branches were down in the area (no major damage or precipitation). Very warm temperatures and occasionally moderate breezes overnight, with readings of 90F at 9:00pm, 83F at 2:00am, and 81F at 4:30am. Winds weakened enough to allow the temperature to quickly drop to 60F at 6:30am for a very short time.
6/30/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/1/2018 7:00 AM 1.09 0.0 0.00 0.0 0.00 Torrential rain with five separate incidences of pea-sized hail (largest about marble-sized) between 3:20-6:05pm MDT on 30 June. -TSRA 3:20-3:45pm with brief pea-sized hail, +TSRA with clear/hard pea-sized hail 3:45-4:00pm (0.26" in 10 minutes between 3:50-4:00pm), TSRA 4:00-4:15pm with pea-sized hail, +TSRA 4:15-4:30pm with pea-sized hail (0.37" in 10 minutes between 4:20-4:30pm), -TSRA 4:30-5:25pm, +TSRA with white, spongy pea-sized hail 5:25-6:05pm. Largest hail about marble sized around 4:15 pm. Peak wind gust only 20 mph from NE at 4:05pm. Temperature dipped to 51F at 6:00pm following end of storms. Drainage ditch in front yard mostly full. Max/min temperature on 30 June 73F/51F. Overnight low 45F (1 July).
7/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/4/2018 7:00 AM T 0.0 0.00 0.0 0.00 Gusty -SHRA 5:45pm on 3 July and 1:45am on 4 July.
7/5/2018 7:00 AM 0.34 0.0 0.00 0.0 0.00 Prolonged thunderstorm with pea-sized hail. TSRA 5:15-6:40pm MDT, with pea-sized hail 5:45-6:00pm. +TSRA 6:40-7:10pm, then -TSRA 7:45-8:20pm. No hail damage.
7/6/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/7/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/13/2018 7:00 AM 0.12 0.0 0.00 0.0 0.00 Prolonged but generally light -TSRA 2:30-5:30pm MDT.
7/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/15/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/16/2018 7:00 AM 0.36 0.0 0.00 0.0 0.00 Mainly overcast and cool. Occasional -SHRA 9:15-10:20am MDT, -RA 12:30-1:10pm, RA 3:15-5:30pm.
7/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/18/2018 7:00 AM 0.03 0.0 0.00 0.0 0.00 -TSRA 3:10-3:30pm MDT and 3:55-4:05pm.
7/19/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/20/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/21/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/22/2018 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA 6:30pm MST.
7/23/2018 6:00 AM 0.01 0.0 0.00 0.0 0.00 Widely scattered -TSRA after 1:00pm-9:30pm MDT. Approaching thunderstorm at time of observation on 23 July.
7/24/2018 7:00 AM 0.16 0.0 0.00 0.0 0.00 An unusual early-morning TSRA 6:10-6:40am MDT. Remaining mostly cloudy and cool throughout the day, with numerous rounds of -TSRA from 12:30pm to 7:30pm.
7/25/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/26/2018 7:00 AM 0.20 0.0 0.00 0.0 0.00 Occasional -SHRA on the afternoon of 25 July, then TSRA 1:30-2:30am on 26 July.
7/27/2018 7:00 AM 0.03 0.0 0.00 0.0 0.00 -SHRA around 10:30am, and again 3:00pm MDT.
7/28/2018 7:00 AM 0.02 0.0 0.00 0.0 0.00 -SHRA 2:00-2:30pm.
7/29/2018 7:00 AM 0.12 0.0 0.00 0.0 0.00 -TSRA around 2:30pm MDT, then occasional TSRA 4:30-5:40pm.
7/30/2018 7:00 AM 0.10 0.0 0.00 0.0 0.00 +TSRA 7:05-7:25pm MDT.
7/31/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/1/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/4/2018 7:00 AM T 0.0 0.00 0.0 0.00
8/5/2018 7:00 AM 0.04 0.0 0.00 0.0 0.00 -TSRA 1:50-2:05pm MDT. Strong but brief thunderstorm with very gusty winds 3:15-3:40pm. 10-minute maximum sustained wind 21 mph (SW) with peak gust of 48 mph (WNW) at 3:30pm. Small branches down.
8/6/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 -SHRA 7:00-8:00am MDT, -TSRA 12:00-12:15pm.
8/7/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 -TSRA 6:40-7:00pm MDT.
8/8/2018 7:00 AM T 0.0 0.00 0.0 0.00 -TSRA 4:50-5:15pm MDT.
8/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/12/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/13/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/15/2018 7:00 AM 0.10 0.0 0.00 0.0 0.00 Occasional -TSRA and TSRA 5:15-8:00pm MDT.
8/16/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/19/2018 7:00 AM 0.23 0.0 0.00 0.0 0.00 -RA 12:15-1:25pm MDT. TSRA 8:35-9:10pm and -RA 9:10-10:15pm.
8/20/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 Isolated light rain showers in the late morning and mid-afternoon. Otherwise, intervals of clouds and sun with a moderate northerly wind in the wake of a cold front.
8/21/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/22/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 Early afternoon sprinkles, then -SHRA 5:10-5:40pm MDT.
8/23/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/24/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/25/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/26/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/27/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/29/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/30/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/31/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/1/2018 7:00 AM 0.02 0.0 0.00 0.0 0.00 Brief -TSRA around 3:00pm MDT, and TSRA 3:55-4:15pm.
9/2/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/3/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/4/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/5/2018 7:00 AM 0.03 0.0 0.00 0.0 0.00 -RA 1:00-1:50am.
9/6/2018 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA (very light) around 6:00pm on 5 September.
9/7/2018 7:00 AM 0.02 0.0 0.00 0.0 0.00 -TSRA 2:40-3:00pm MDT on 6 September.
9/8/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/9/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/10/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/11/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/12/2018 7:00 AM T 0.0 0.00 0.0 0.00 Very brief but gusty -TSRA from 11:25-11:45am MDT. At 11:45am winds gusted to 32 mph from the SE, but the 10-min sustained wind was only 5 mph (and from the NNW). Warm and dry during the afternoon with a high of 90.3F (morning low 49.1F).
9/13/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued very warm and dry: high temperature 92F with relative humidity down to 13% in the afternoon.
9/14/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/15/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/16/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/17/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/18/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 A stretch of unusually hot and dry weather: yesterday (17 Sep) marked the 7th consecutive day with high temperatures equal to or exceeding 90F.
9/19/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 Our 7-day 90F streak came to an end yesterday, with a high temperature "only" 88F.
9/20/2018 7:00 AM 0.04 0.0 0.00 0.0 0.00 TSRA 5:20-5:50pm MDT, SHRA 10:20-10:55pm MDT.
9/21/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/22/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/23/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/24/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/25/2018 7:00 AM 0.01 0.0 0.00 0.0 0.00 TSRA 2:15-2:30pm MDT. Gusty northerly winds 1:45-4:00am, peak gust from the NE at 3:00am.
9/26/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/27/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00 After a high of 77F, abrupt wind shift from SW to NE around 8:30pm MDT ushered in cooler air and low clouds. Continued dry.
9/29/2018 7:00 AM T 0.0 0.00 0.0 0.00 Unusually cool with a light drizzle and a low overcast sky throughout the day. Midnight (9/28) temperature of 50F, but a daytime high only 48F and early afternoon temperatures in the lower 40s F. Overnight low 37F (9/29).
9/30/2018 7:00 AM T 0.0 0.00 0.0 0.00 A "heavy" trace, almost 0.01" but not quite. -DZ 4:30am to the 7:00am MDT observation on 30 Sept. No fog observed.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground