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 16 1.12 0.55 31 0.55 31 0.00 0 0 5 0 0.0 0 0
Nov 16 0.72 0.25 30 0.25 30 0.00 0 0 2 1 2.3 1 2
Dec 16 0.60 0.48 31 0.48 31 0.00 0 0 4 4 7.7 4 7
Jan 17 0.46 0.77 31 0.77 31 0.00 0 0 8 2 10.7 8 13
Feb 17 0.48 0.35 28 0.35 28 0.00 0 0 7 2 3.6 4 6
March 17 1.55 1.12 31 1.12 31 0.00 0 0 7 3 0.1 1 0
April 17 1.96 2.26 30 2.26 30 0.00 0 0 12 1 4.1 4 4
May 17 2.44 3.78 31 3.78 31 0.00 0 0 14 4 7.4 1 2
June 17 1.96 0.23 30 0.23 30 0.00 0 0 4 6 0.0 0 0
July 17 1.46 1.23 31 1.23 31 0.00 0 0 7 10 0.0 0 0
Aug 17 1.39 1.85 31 1.85 31 0.00 0 0 12 5 0.0 0 0
Sept 17 1.36 1.96 30 1.96 30 0.00 0 0 9 4 0.0 0 0
Water Year Totals: 15.50" 14.83" 365 days 14.83" 365 0.00" 0 days 0 91 days 42 days 35.9" 23 days 34 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
10/1/2016 0.00
10/2/2016 0.00
10/3/2016 0.00
10/4/2016 0.00
10/5/2016 0.00
10/6/2016 0.05
10/7/2016 0.10
10/8/2016 0.00
10/9/2016 0.00
10/10/2016 0.00
10/11/2016 0.00
10/12/2016 0.35
10/13/2016 0.01
10/14/2016 0.00
10/15/2016 0.00
10/16/2016 0.00
10/17/2016 0.00
10/18/2016 0.00
10/19/2016 0.04
10/20/2016 0.00
10/21/2016 0.00
10/22/2016 0.00
10/23/2016 0.00
10/24/2016 0.00
10/25/2016 0.00
10/26/2016 0.00
10/27/2016 0.00
10/28/2016 0.00
10/29/2016 0.00
10/30/2016 0.00
10/31/2016 0.00
11/1/2016 0.00
11/2/2016 0.00
11/3/2016 0.00
11/4/2016 0.00
11/5/2016 0.00
11/6/2016 0.00
11/7/2016 0.00
11/8/2016 0.00
11/9/2016 0.00
11/10/2016 0.00
11/11/2016 0.00
11/12/2016 0.00
11/13/2016 0.00
11/14/2016 0.00
11/15/2016 0.00
11/16/2016 0.00
11/17/2016 0.00
11/18/2016 0.16
11/19/2016 0.00
11/20/2016 0.00
11/21/2016 0.00
11/22/2016 0.09
11/23/2016 0.00
11/24/2016 0.00
11/25/2016 0.00
11/26/2016 0.00
11/27/2016 0.00
11/28/2016 T
11/29/2016 0.00
11/30/2016 0.00
12/1/2016 0.00
12/2/2016 0.00
12/3/2016 T
12/4/2016 0.00
12/5/2016 0.00
12/6/2016 0.00
12/7/2016 0.17
12/8/2016 T
12/9/2016 0.00
12/10/2016 0.00
12/11/2016 T
12/12/2016 0.06
12/13/2016 0.00
12/14/2016 0.00
12/15/2016 0.00
12/16/2016 0.00
12/17/2016 0.24
12/18/2016 0.00
12/19/2016 0.00
12/20/2016 0.00
12/21/2016 0.00
12/22/2016 0.00
12/23/2016 0.00
12/24/2016 0.00
12/25/2016 T
12/26/2016 0.01
12/27/2016 0.00
12/28/2016 0.00
12/29/2016 0.00
12/30/2016 0.00
12/31/2016 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2017 0.00
1/2/2017 0.00
1/3/2017 0.12
1/4/2017 0.01
1/5/2017 0.42
1/6/2017 0.01
1/7/2017 0.00
1/8/2017 0.00
1/9/2017 0.00
1/10/2017 0.01
1/11/2017 0.00
1/12/2017 0.01
1/13/2017 T
1/14/2017 0.00
1/15/2017 0.00
1/16/2017 0.13
1/17/2017 0.00
1/18/2017 0.00
1/19/2017 0.00
1/20/2017 0.00
1/21/2017 0.00
1/22/2017 0.00
1/23/2017 0.00
1/24/2017 0.06
1/25/2017 T
1/26/2017 0.00
1/27/2017 0.00
1/28/2017 0.00
1/29/2017 0.00
1/30/2017 0.00
1/31/2017 0.00
2/1/2017 0.00
2/2/2017 0.08
2/3/2017 0.01
2/4/2017 T
2/5/2017 0.00
2/6/2017 0.00
2/7/2017 0.00
2/8/2017 0.02
2/9/2017 0.00
2/10/2017 0.00
2/11/2017 0.00
2/12/2017 T
2/13/2017 0.00
2/14/2017 0.00
2/15/2017 0.00
2/16/2017 0.00
2/17/2017 0.00
2/18/2017 0.00
2/19/2017 0.00
2/20/2017 0.01
2/21/2017 0.00
2/22/2017 0.00
2/23/2017 0.07
2/24/2017 0.15
2/25/2017 0.01
2/26/2017 0.00
2/27/2017 0.00
2/28/2017 0.00
3/1/2017 T
3/2/2017 0.00
3/3/2017 0.00
3/4/2017 0.00
3/5/2017 0.00
3/6/2017 0.00
3/7/2017 0.00
3/8/2017 0.00
3/9/2017 0.00
3/10/2017 0.00
3/11/2017 0.02
3/12/2017 0.00
3/13/2017 T
3/14/2017 0.00
3/15/2017 0.00
3/16/2017 0.00
3/17/2017 0.00
3/18/2017 0.00
3/19/2017 0.00
3/20/2017 0.00
3/21/2017 0.00
3/22/2017 T
3/23/2017 0.00
3/24/2017 0.02
3/25/2017 0.00
3/26/2017 0.01
3/27/2017 0.56
3/28/2017 0.01
3/29/2017 0.46
3/30/2017 0.00
3/31/2017 0.04
Day of YearDaily PrcpMultiday Prcp
4/1/2017 0.29
4/2/2017 0.01
4/3/2017 0.08
4/4/2017 0.04
4/5/2017 0.20
4/6/2017 0.00
4/7/2017 0.00
4/8/2017 0.00
4/9/2017 0.00
4/10/2017 0.00
4/11/2017 0.00
4/12/2017 0.00
4/13/2017 0.00
4/14/2017 0.00
4/15/2017 0.00
4/16/2017 0.00
4/17/2017 0.00
4/18/2017 0.00
4/19/2017 0.00
4/20/2017 0.00
4/21/2017 0.68
4/22/2017 0.11
4/23/2017 0.00
4/24/2017 0.00
4/25/2017 0.22
4/26/2017 0.04
4/27/2017 T
4/28/2017 0.04
4/29/2017 0.43
4/30/2017 0.12
5/1/2017 0.00
5/2/2017 0.00
5/3/2017 0.05
5/4/2017 0.00
5/5/2017 0.00
5/6/2017 0.00
5/7/2017 0.00
5/8/2017 0.02
5/9/2017 0.30
5/10/2017 T
5/11/2017 0.14
5/12/2017 0.00
5/13/2017 0.00
5/14/2017 T
5/15/2017 0.00
5/16/2017 T
5/17/2017 0.04
5/18/2017 0.81
5/19/2017 2.11
5/20/2017 0.02
5/21/2017 0.00
5/22/2017 0.05
5/23/2017 0.07
5/24/2017 0.00
5/25/2017 0.00
5/26/2017 0.10
5/27/2017 0.02
5/28/2017 0.04
5/29/2017 0.01
5/30/2017 T
5/31/2017 0.00
6/1/2017 0.08
6/2/2017 0.00
6/3/2017 T
6/4/2017 0.00
6/5/2017 0.00
6/6/2017 T
6/7/2017 0.00
6/8/2017 T
6/9/2017 0.00
6/10/2017 0.00
6/11/2017 0.00
6/12/2017 0.00
6/13/2017 0.03
6/14/2017 0.00
6/15/2017 0.00
6/16/2017 0.00
6/17/2017 0.00
6/18/2017 T
6/19/2017 0.00
6/20/2017 0.00
6/21/2017 T
6/22/2017 T
6/23/2017 0.03
6/24/2017 0.00
6/25/2017 0.00
6/26/2017 0.00
6/27/2017 0.00
6/28/2017 0.00
6/29/2017 0.00
6/30/2017 0.09
Day of YearDaily PrcpMultiday Prcp
7/1/2017 0.00
7/2/2017 0.00
7/3/2017 T
7/4/2017 T
7/5/2017 T
7/6/2017 0.00
7/7/2017 0.05
7/8/2017 0.01
7/9/2017 0.00
7/10/2017 T
7/11/2017 T
7/12/2017 T
7/13/2017 0.01
7/14/2017 0.00
7/15/2017 0.00
7/16/2017 0.00
7/17/2017 0.00
7/18/2017 T
7/19/2017 0.00
7/20/2017 T
7/21/2017 T
7/22/2017 0.01
7/23/2017 0.00
7/24/2017 0.00
7/25/2017 0.00
7/26/2017 0.05
7/27/2017 1.08
7/28/2017 0.02
7/29/2017 T
7/30/2017 0.00
7/31/2017 0.00
8/1/2017 0.00
8/2/2017 0.00
8/3/2017 0.11
8/4/2017 0.06
8/5/2017 0.04
8/6/2017 0.04
8/7/2017 0.66
8/8/2017 0.16
8/9/2017 0.08
8/10/2017 0.09
8/11/2017 0.39
8/12/2017 T
8/13/2017 0.01
8/14/2017 0.02
8/15/2017 0.19
8/16/2017 T
8/17/2017 T
8/18/2017 T
8/19/2017 0.00
8/20/2017 0.00
8/21/2017 0.00
8/22/2017 0.00
8/23/2017 0.00
8/24/2017 T
8/25/2017 0.00
8/26/2017 0.00
8/27/2017 0.00
8/28/2017 0.00
8/29/2017 0.00
8/30/2017 0.00
8/31/2017 0.00
9/1/2017 0.01
9/2/2017 0.00
9/3/2017 0.00
9/4/2017 0.00
9/5/2017 0.00
9/6/2017 0.00
9/7/2017 0.00
9/8/2017 0.00
9/9/2017 0.00
9/10/2017 T
9/11/2017 0.00
9/12/2017 0.00
9/13/2017 0.00
9/14/2017 0.01
9/15/2017 T
9/16/2017 0.19
9/17/2017 0.01
9/18/2017 0.00
9/19/2017 0.00
9/20/2017 0.00
9/21/2017 0.00
9/22/2017 0.00
9/23/2017 T
9/24/2017 0.81
9/25/2017 0.40
9/26/2017 0.01
9/27/2017 0.00
9/28/2017 0.49
9/29/2017 0.03
9/30/2017 T



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/2/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/3/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/4/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/5/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/6/2016 6:00 AM 0.05 0.0 0.00 0.0 0.00
10/7/2016 7:00 AM 0.10 0.0 0.00 0.0 0.00 Brief thundershower 5:15-5:30 pm MDT on 6 Oct. Very dense fog this morning but remained above freezing (this morning's low was 34F).
10/8/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/9/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/10/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/11/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/12/2016 7:00 AM 0.35 0.0 0.00 0.0 0.00 Occasional thundershowers 8:50-10:30pm (11 Oct), then light rain from 12:15-1:30am (12 Oct). Strong SW winds from 2:10-3:45pm (11 Oct), peak gust 38 mph. Weather at 12 Oct observation: overcast, light mist, 34F.
10/13/2016 7:00 AM 0.01 0.0 0.00 0.0 0.00
10/14/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/15/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/16/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/17/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/18/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00 Extremely strong NW winds on 17 Oct. Peak wind gust 52 mph at 12:50pm MT (daily average wind speed 8.6 mph).
10/19/2016 7:00 AM 0.04 0.0 0.00 0.0 0.00
10/20/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00 First freeze on 20 Oct: 26F at 7:00am CoCoRaHS observation (official low temperature for 20 Oct will be 25.2F at 7:40am, after CoCoRaHS observation).
10/21/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/22/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/23/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/24/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/25/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/26/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/27/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/28/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/29/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/30/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
10/31/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/1/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/2/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/3/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/4/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/5/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/6/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/7/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/8/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/9/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/10/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/11/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/12/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/13/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/14/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/15/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/16/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/17/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/18/2016 7:00 AM 0.16 2.3 0.16 2.3 0.16
11/19/2016 7:00 AM 0.00 0.0 0.00 1.0 0.05
11/20/2016 7:00 AM 0.00 0.0 0.00 T T
11/21/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/22/2016 7:00 AM 0.09 0.0 0.00 0.0 0.00 Precipitation fell as all light rain between 11:10pm (11/21/2016) and 3:20am (11/22/2016) MST.
11/23/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/24/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/25/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/26/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/27/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/28/2016 7:00 AM T 0.0 0.00 0.0 0.00 Brief light rain shower with gusty winds (to 33 mph) around 8:30am MST.
11/29/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
11/30/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/1/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/2/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/3/2016 7:00 AM T T T 0.0 0.00 Light snow showers midday into early afternoon, no accumulation.
12/4/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/5/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/6/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/7/2016 7:00 AM 0.17 3.5 0.17 3.5 0.17 Light snow began around 6:00pm MST and continued through 8:00am. Temperatures during the snow were in the low-mid teens.
12/8/2016 7:00 AM T T T 2.5 0.16
12/9/2016 7:00 AM 0.00 0.0 0.00 2.0 0.15
12/10/2016 7:00 AM 0.00 0.0 0.00 1.5 0.09
12/11/2016 7:00 AM T T T M M
12/12/2016 7:00 AM 0.06 0.6 0.06 M M
12/13/2016 7:00 AM 0.00 0.0 0.00 M M
12/14/2016 7:00 AM 0.00 0.0 0.00 M M
12/15/2016 7:00 AM 0.00 0.0 0.00 M M
12/16/2016 7:00 AM 0.00 0.0 0.00 M M
12/17/2016 7:00 AM 0.24 3.4 0.24 M M
12/18/2016 7:00 AM 0.00 0.0 0.00 M M
12/19/2016 7:00 AM 0.00 0.0 0.00 M M
12/20/2016 7:00 AM 0.00 0.0 0.00 3.0 0.34
12/21/2016 7:00 AM 0.00 0.0 0.00 M M
12/22/2016 7:00 AM 0.00 0.0 0.00 M M
12/23/2016 7:00 AM 0.00 0.0 0.00 1.5 0.25
12/24/2016 7:00 AM 0.00 0.0 0.00 1.0 0.30
12/25/2016 7:00 AM T T T T T Brief shower of snow grains around 5:45am MST (timing according to KCYS radar). Existing snow depth highly variable (mostly 0" but up to 2" in limited shaded areas).
12/26/2016 7:00 AM 0.01 0.2 0.01 T T Snow grains 9:50-10:10am, then snow showers (heavy at times) 10:10-10:50am. Most snow melted upon contact with ground. Windy during the afternoon (peak gust 40 mph at 1:30pm).
12/27/2016 7:00 AM 0.00 0.0 0.00 T T
12/28/2016 7:00 AM 0.00 0.0 0.00 T T
12/29/2016 7:00 AM 0.00 0.0 0.00 T T
12/30/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
12/31/2016 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/3/2017 7:00 AM 0.12 2.1 0.12 2.0 0.12 Light, steady snow began around 12:30am MST on 3 Jan 2016 and continued through observation. Light winds.
1/4/2017 7:00 AM 0.01 0.2 0.01 2.0 0.13 Light snow tapered off by around 9:00am MST. Low stratocumulus remained throughout the day with a high temperature of 20F and overnight low of 6F. Light winds.
1/5/2017 7:00 AM 0.42 5.9 0.42 7.5 M Steady light snow throughout the day, then periodic heavier snow overnight. Daytime high temperature 12F and overnight low 4F. Moderate NE winds 5-10 mph with gusts to 17 mph. Lowest windchill -10F.
1/6/2017 7:00 AM 0.01 0.1 0.01 6.0 0.58 Light snow showers tapering off by 9:00am MST; remaining cloudy throughout the day, then clearing. High temp 7F, overnight low -17F.
1/7/2017 7:00 AM 0.00 0.0 0.00 5.0 0.61 Overnight low -6F.
1/8/2017 7:00 AM 0.00 0.0 0.00 5.0 0.65
1/9/2017 7:00 AM 0.00 0.0 0.00 3.5 0.67
1/10/2017 7:00 AM 0.01 0.0 0.00 0.5 0.15 Light rain shower with gusty winds ~8:15-9:00pm MST. Very windy. Peak gust on 9 Jan 2016: 45 mph. Another gust to 37 mph early morning 10 Jan 2016.
1/11/2017 7:00 AM 0.00 0.0 0.00 T T About 30% of ground is covered with a small amount of snow.
1/12/2017 7:00 AM 0.01 0.3 0.01 0.3 0.01 Quick burst of moderate to heavy snowfall between 3:50-5:00 pm MST. Extremely slippery road conditions at that time.
1/13/2017 7:00 AM T 0.1 T T T Very light snow 4:30-6:00pm MST on 12 Jan 2017. Ground covered with a dusting of snow.
1/14/2017 7:00 AM 0.00 0.0 0.00 T T
1/15/2017 7:00 AM 0.00 0.0 0.00 T T
1/16/2017 7:00 AM 0.13 1.8 0.13 2.0 0.13 Light wet snow overnight.
1/17/2017 7:00 AM 0.00 0.0 0.00 0.5 0.04
1/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/22/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/24/2017 7:00 AM 0.06 0.2 0.06 0.2 0.06 Moderate wet snow and sleet turning to light snow from 8:00-10:30pm on 24 Jan 2017.
1/25/2017 7:00 AM T T T 0.1 T Snow flurries in the afternoon.
1/26/2017 7:00 AM 0.00 0.0 0.00 T T
1/27/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/30/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
1/31/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/2/2017 7:00 AM 0.08 0.7 0.08 0.7 0.08 Light freezing rain and snow flurries developing during the afternoon and continuing overnight through the morning observation. A period of light snow during the evening amounted to about half the reported snowfall. Very slippery roads last evening, improved conditions this morning.
2/3/2017 7:00 AM 0.01 0.1 0.01 0.5 0.05 Occasional very light snow from morning observation through late morning. Remaining cold with a low overcast all day; high temperature 23F.
2/4/2017 7:00 AM T T T 0.5 0.05 Snow flurries just after morning observation on 3 Feb 2017. Stubborn weak upslope flow: Remaining cold and overcast (high 25F) despite promise of warmer temperatures and clearing skies!
2/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 33F warmer on 4 Feb than 3 Feb thanks to shift to warming downslope winds and clear skies.
2/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/8/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Strong winds during the day on 7 Feb 2017; 10-min sustained winds 21 mph with a peak gust of 42 mph. Light rain showers and gusty winds between about 1:00-2:30am MST.
2/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued unusually warm with very strong westerly winds. Peak gust during the 8 Feb 2017 daytime 40 mph with sustained 10-minute winds 20 mph. High temp on 8 Feb: 57F.
2/10/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Damaging winds overnight: Sustained SW-W winds around 25-30 mph. Peak gust 54 mph at 4:00am. Loss of neighborhood power 4:00am-7:30am. Utility pole bent low on US-287 between Trilby and Carpenter. Widespread blowing dust reducing visibility south of Harmony Rd. and from US-287 west to Foothills. Trash from landfill scattered east of Taft Hill Rd. Overnight low temperature 59.5F at 5:40am but rising to/above 70F by 7:00am observation.
2/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Record warmth for Fort Collins and continued strong west winds. High temperature 73.7F on 10 Feb 2017 (77F at official CSU weather station is warmest February temperature ever recorded). Midnight-midnight (10 Feb) average wind 15.7 mph (peak 54 mph), minimum temp 58.8F just before midnight on 10 Feb (morning low temp 59.5F). 7:00am temp on 10 Feb: 70F! Very dry, numerous grass fires in area (1-2 miles NE of this station).
2/12/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief, gusty rain shower from 2:20-3:00 pm.
2/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/20/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Light rain showers 5:15-8:30 pm MST. Continued unseasonably mild, feels springlike.
2/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/22/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
2/23/2017 7:00 AM 0.07 T T T T Light rain, ice pellets, and snow beginning around 1:00am on 24 Feb and continuing through the morning observation (7:00am).
2/24/2017 7:00 AM 0.15 2.7 0.15 2.7 0.15 Light to moderate snow through mid-afternoon, heaviest between about 10:00am-1:00pm MST. Snow ended in the late afternoon but then light snow showers resumed around 6:00am MST through morning observation (24 Feb). Liquid amount on 24 Feb a trace (so far).
2/25/2017 7:00 AM 0.01 0.1 0.01 1.5 0.13 Occasional light snow showers until mid-afternoon, then remaining mostly cloudy.
2/26/2017 7:00 AM 0.00 0.0 0.00 1.5 0.15
2/27/2017 7:00 AM 0.00 0.0 0.00 T T
2/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/1/2017 7:00 AM T 0.1 T T T Occasional light snow showers during the late morning and early afternoon on 28 Feb 2017.
3/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/3/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/4/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Windy on 6 March. Midnight-midnight average wind speed 11.5 mph with peak gust 42 mph. Virga during a strong frontal passage in the morning, but no surface precipitation.
3/8/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued very windy and dry. Average wind speed on 7 March was 10.2 mph with peak gust 45 mph.
3/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/10/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/11/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Light rain showers 4:15-6:00am. 0.04" in tipping bucket gauge.
3/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/13/2017 7:00 AM T 0.0 0.00 0.0 0.00 Isolated light rain showers 3:00-4:30pm with gusty midday winds (peak gust 40 mph at 1:40pm).
3/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Unusually warm and dry. On 18 March 2017: high 80.2F, low 32.0F. Overnight low this morning (19 March) 44.9F.
3/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued very warm and dry. On 19 March: high 78.3F, low 44.9F. Relative humidity 10-15% during the afternoon.
3/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/22/2017 7:00 AM T 0.0 0.00 0.0 0.00 A light sprinkle around 6:10pm MDT.
3/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/24/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Widely intermittent light rain showers 8:15pm 23 Mar to 5:00am 24 Mar 2017. No snow. Gusty northerly winds peaking at 39 mph.
3/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/26/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Light rain showers 2:00am-4:30am on 26 Mar 2017.
3/27/2017 7:00 AM 0.56 0.0 0.00 0.0 0.00 Occasional convective rain showers throughout the afternoon, with some breaks of sun late afternoon. Pea-sized hail 1:00 to ~1:15pm and again 1:25-1:40pm (just a trace of hail accumulation). Moderate rain showers 1:20-1:50pm: 0.34" during this 30-min window.
3/28/2017 6:30 AM 0.01 0.0 0.00 0.0 0.00 Sprinkles late evening, then -SHRA beginning around 4:00am through observation time. -SHRA at time of observation (28 March).
3/29/2017 7:00 AM 0.46 0.0 0.00 0.0 0.00 -SHRA between 6:00-9:30am, then overcast. Light but steady rain throughout the afternoon through about 10:00pm. Moderate northerly winds.
3/30/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
3/31/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 -SHRA 7:00-8:00pm (30 Mar 2017), 12:00-1:00am (31 Mar 2017). -DZ at time of observation (both 30 Mar and 31 Mar).
4/1/2017 7:00 AM 0.29 T 0.02 0.0 0.00 Persistent -DZ throughout the 24 hour period. A small amount of snow/slush in the rain gauge this morning, which melted down to 0.02" and likely fell in the early morning hours when temperatures were hovering around 33F. Daytime high temperature in 31 March 2017 was around 39F.
4/2/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Light drizzle through the morning, then remaining overcast and cool. High 43F, this morning's low 30F.
4/3/2017 7:00 AM 0.08 0.0 0.00 0.0 0.00 Line of gusty SHRA moved through between 12:05-12:35am on 3 April 2017.
4/4/2017 7:00 AM 0.04 0.2 0.03 0.1 0.03 Precipitation beginning around 12:30am as light rain, then transitioning to snow by about 2:00am. Warm ground reduced snow accumulation.
4/5/2017 7:00 AM 0.20 0.1 0.08 0.1 0.08 Rain changing to moderate snow from ~2:30-6:00pm on 4 April 2017. Surface snow depth had melted almost completely prior to new precipitation.
4/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/8/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/10/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/21/2017 7:00 AM 0.68 0.0 0.00 0.0 0.00 TSRA with rice-sized hail from 6:25-6:50pm (20 April), then -RA through 7:20pm. Just a trace of hail accumulation. -RA from 9:30-10:00pm and from 2:00-3:00am (21 April). RA from 3:00-5:00am. Half of the reported rain total fell on 20 April. Generally light winds.
4/22/2017 7:00 AM 0.11 0.0 0.00 0.0 0.00 Occasional light rain between 11:00pm-6:50am (just before observation).
4/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
4/25/2017 7:00 AM 0.22 0.0 0.00 0.0 0.00 Occasional -SHRA from 4:15-7:00pm MDT, then RA from 11:30pm-1:00am MDT.
4/26/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 -SHRA between 12:15-1:30pm on 25 April.
4/27/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief -SHRA around 7:00pm on 26 April.
4/28/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 Occasional -SHRA between 12:00-1:30pm on 27 April 2017. Thick fog and reduced visibility (~0.25 mi) at this morning's observation.
4/29/2017 7:00 AM 0.43 1.7 0.23 1.5 0.23 A brief period of light rain from 2:00-3:30pm, then changing to snow around 3:30pm. Persistent snow overnight, heaviest between about 5:00-7:00am. At 29 April morning observation: SN, visibility 0.25 mi, 31F (wind data unavailable due to snow accretion on anemometer).
4/30/2017 7:00 AM 0.12 2.1 0.12 1.5 0.23 Moderate to occasionally heavy snow in the morning very gradually tapering to intermittent snow showers by midday and then flurries by afternoon. Fresh snow cover, clearing skies and calm winds help to produce cold overnight temperatures: the low this morning was 22.5F at 6:00am (30 April 2017).
5/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/3/2017 7:00 AM 0.05 0.0 0.00 0.0 0.00 A brief rain shower between 2:00-2:30pm, intermittent light rain showers between 9:45pm-12:00am, then another brief rain shower around 6:00am.
5/4/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 A brief period of strong winds from a distant outflow boundary moving northward across the area. At 6:20pm, 10-minute sustained wind of 16 mpg with a peak gust of 32 mph.
5/8/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Brief thundershower with very gusty winds followed by light rain between 4:30-5:30pm. At 4:50 pm, 10-minute sustained wind of 20 mph with gusts to 34 mph.
5/9/2017 7:00 AM 0.30 0.0 0.00 0.0 0.00 TSRA between 2:50-3:50pm, then occasional -SHRA between 3:50pm-12:00am (heavier period around 8:30pm). Mild overnight with low ceilings, with a low temperature of 52F.
5/10/2017 7:00 AM T 0.0 0.00 0.0 0.00 Very light drizzle from 6:00am to the 7:00am observation.
5/11/2017 7:00 AM 0.14 0.0 0.00 0.0 0.00 Overcast all day with -SHRA between 8:30-10:30am, then again from 4:00-6:30pm. Intermittent light drizzle throughout the period.
5/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/14/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief gusty rain shower from 5:00-5:20pm, but just a few sprinkles felt on the ground.
5/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/16/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief -TSRA from 5:20-5:50pm.
5/17/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 -TSRA from 2:00-3:15pm.
5/18/2017 6:15 AM 0.81 0.0 0.00 0.0 0.00 Light rain with thunder beginning around 5:30pm, becoming a persistent moderate rain after 7:45pm and continuing through the night. Breezy NE winds (peak gust 33 mph at 7:10pm on 17 May) shifting to NNW. -RA and 37F at 18 May observation. No snow yet, just a cold rain.
5/19/2017 7:00 AM 2.11 7.4 1.83 5.5 1.49 -RA changed to SN around 8:00am on 18 May. Persistent SN throughout the day, heavy at times. +SN from about 5:00-10:30pm. Liquid equivalent measurements will be entered later (snow cores are melting). 1-2" diameter branches down in neighborhood, larger branches broken in downtown Fort Collins. Primary roads generally just wet but secondary roads slushy, especially this morning. High temperature on 18 May 2017 40.2F at midnight, low 32.8F at 1:10 pm (daytime temperature steady in the low 30sF). Overnight low 32.6F. Steady NNW breezes 5 mph gusting to ~17 mph.
5/20/2017 7:00 AM 0.02 T T 1.5 0.50 -SN gradually ending by about 9:30am, then remaining mostly cloudy. A brief rain shower between 1:30-2:00pm. Unseasonably cool: high temperature 47F, low 33F.
5/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/22/2017 7:00 AM 0.05 0.0 0.00 0.0 0.00 Scattered SHRA between 4:00-7:30pm MDT.
5/23/2017 7:00 AM 0.07 0.0 0.00 0.0 0.00 -RA with gusty north winds as cold front dropped south out of Wyoming across the Front Range. Rain occurred between 4:45pm and gradually tapered off shortly after 6:00pm. Peak 10-minute wind speed 14 mph with gust to 24 mph at 3:40pm.
5/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
5/26/2017 7:00 AM 0.10 0.0 0.00 0.0 0.00 Fast-moving scattered rain showers raced across the area from west to east during the afternoon with a slower-moving area of light rain during the overnight hours. -SHRA around 2:30pm and again 6:00pm, then -RA 11:00pm-12:30am (25-26 May 2017).
5/27/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 -SHRA from 5:30am to the 7:00am observation.
5/28/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 Intermittent -SHRA at the 5/27 morning observation (7:00am MDT) and again throughout the afternoon. -TSRA from 6:00-6:30pm.
5/29/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Intermittent, isolated rain showers during the mid-late afternoon.
5/30/2017 7:00 AM T 0.0 0.00 0.0 0.00 At around 4:00pm MDT, a few sprinkles from a neighboring thunderstorm to our south.
5/31/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/1/2017 7:00 AM 0.08 0.0 0.00 0.0 0.00 Brief but gusty thunderstorm from 3:45-4:15pm. Peak wind gust 30 mph at 4:00pm. Temperature dropped from 82F at 3:20pm to 63F at 4:10pm but rebounded to 81F by 5:20pm.
6/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/3/2017 7:00 AM T 0.0 0.00 0.0 0.00 Thundershower between 7:35-8:00pm MDT, followed by perhaps the most spectacular double rainbow I have ever seen. The vivid double rainbow spanned the entire arc of the sky, and supernumerary bands (faint pastel pink and green) were visible on the inside of the primary rainbow. The rainbow lasted for about 20 minutes.
6/4/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/6/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief, very gusty rain shower from 1:00-1:15pm. 10-minute sustained wind 12 mph with gusts to 38 mph from the NW.
6/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/8/2017 7:00 AM T 0.0 0.00 0.0 0.00 Thundershower with lots of lightening from 8:15-8:45pm MDT. Wind gust to 33 mph at 8:20pm MDT toward the beginning of the storm.
6/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/10/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 High temperature 92.4F.
6/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/13/2017 7:00 AM 0.03 0.0 0.00 0.0 0.00 Brief thunderstorm from 2:30-3:00pm MDT. No hail observed. Peak wind gust 29 mph at 2:40pm MDT from the ESE. Wind shift to NE following the storm, presumably from storm outflow (storm center was to NE).
6/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/18/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief late-afternoon thundershower.
6/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/21/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief thundershower around 4:45pm MDT. Later around 7:00, thunder in vicinity but no precipitation. Wind gust to 25 mph at 7:40pm in association with the nearby thunderstorm.
6/22/2017 7:00 AM T 0.0 0.00 0.0 0.00 Thundershower from 5:35-5:45pm MDT. Very hot during the past 24 hours: 6/21/2017 high temperature was 98.9F, overnight low 60.0F.
6/23/2017 7:00 AM 0.03 0.0 0.00 0.0 0.00 Intermittent -RA between 4:15-5:15am MDT as a cool front crossed the region from north to south. No thunder. Temperature dropped from 67F at 1:00am to 52F at 6:00am. High temperature on 6/22 was 88F reached at 10:40am, then becoming cooler and cloudy.
6/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/26/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/27/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
6/30/2017 7:00 AM 0.09 0.0 0.00 0.0 0.00 Light thundershowers around 1:30pm and again 5:45pm MDT amounting to only a trace of rainfall. Heavier thunderstorm from 11:00-11:45pm MDT.
7/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/3/2017 7:00 AM T 0.0 0.00 0.0 0.00 Isolated, gusty afternoon showers.
7/4/2017 7:00 AM T 0.0 0.00 0.0 0.00 Isolated afternoon thundershowers.
7/5/2017 7:00 AM T 0.0 0.00 0.0 0.00 Isolated afternoon thundershower with a few drops of rain.
7/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/7/2017 7:00 AM 0.05 0.0 0.00 0.0 0.00 Very gusty thunderstorm during the mid-afternoon. Abrupt wind shift from SE to NW at 3:20pm MDT with gusts to 41 mph at 3:30pm. The disappointedly meager amount of rain fell between 3:30-4:00pm. Temperature dropped from 93F to 66F in one hour. No hail observed.
7/8/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Brief thundershower around 4:15pm MDT.
7/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/10/2017 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA 4:15-4:45pm.
7/11/2017 7:00 AM T 0.0 0.00 0.0 0.00 Brief -SHRA in the morning and another round of -TSRA around 8:30pm.
7/12/2017 7:00 AM T 0.0 0.00 0.0 0.00 Very light evening rain showers. -DZ at 12 July 7:00am observation. Warm overnight temperatures: overnight low temperature 67F on morning of 12 July.
7/13/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Scattered -SHRA 7:00-10:30am.
7/14/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/15/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/16/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/17/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/18/2017 7:00 AM T 0.0 0.00 0.0 0.00 Light sprinkles around 2:15pm.
7/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/20/2017 7:00 AM T 0.0 0.00 0.0 0.00 A few sprinkles in the late afternoon, mainly between 5:10-5:40pm.
7/21/2017 7:00 AM T 0.0 0.00 0.0 0.00 Very light rain around 6:00pm (no thunder heard).
7/22/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 -SHRA 8:10-10:20 pm on 7/21/2017.
7/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/24/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Thunder in vicinity, but no rain.
7/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/26/2017 7:00 AM 0.05 0.0 0.00 0.0 0.00 -SHRA 7:10-7:30pm MDT.
7/27/2017 7:00 AM 1.08 0.0 0.00 0.0 0.00 Light thundershower around 1:50pm. Thunderstorm with torrential rain 5:30-6:30pm MDT. 0.94" in 30 minutes. Unknown if hail or flooding occurred (observer out of town).
7/28/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 -TSRA 7:45-8:00pm MDT.
7/29/2017 7:00 AM T 0.0 0.00 0.0 0.00 Occasional -SHRA 6:15-8:30pm MDT.
7/30/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/31/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/1/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/3/2017 7:00 AM 0.11 0.0 0.00 0.0 0.00 Occasional -TSRA 4:30-6:00pm MDT, an isolated shower around 8:30pm, and -RA 3:20-3:40am.
8/4/2017 7:00 AM 0.06 0.0 0.00 0.0 0.00 -SHRA from 4:50-5:10pm MDT on 3 August. Low clouds and unseasonably cool for most of the day, high temperature on 8/3 only 68 F.
8/5/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 -TSRA 5:00-5:20pm MDT, then -TSRA 6:45-7:30pm. Gusty NW-WNW winds from thunderstorm outflow between 7:00-7:15pm (10-minute sustained wind 16 mph and peak gust 36 mph). A few twigs down on lawn.
8/6/2017 7:00 AM 0.04 0.0 0.00 0.0 0.00 Intermittent -TSRA 2:00-3:00pm (MDT) and 4:00-5:15pm. Steady -TSRA 6:00-7:30pm. Low-cloud overcast at 8/6 observation.
8/7/2017 6:15 AM 0.66 0.0 0.00 0.0 0.00 Overcast throughout the period with intermittent light drizzle during the morning and late evening and scattered -SHRA during the afternoon with some heavier showers. A period of moderate rain from 3:30-5:15am.
8/8/2017 7:00 AM 0.16 0.0 0.00 0.0 0.00 -DZ during the morning, -RA 2:30-4:00pm MDT, -SHRA 6:15-7:30pm. A low overcast all day and unseasonally cool: high temperature 63F, low 55F. Fog with visibility about 0.5 mile on the 8/8/2017 observation.
8/9/2017 7:00 AM 0.08 0.0 0.00 0.0 0.00 -SHRA 4:00-4:45pm MDT and 9:45-10:00pm. Low clouds in the morning but some clearing by afternoon.
8/10/2017 7:00 AM 0.09 0.0 0.00 0.0 0.00 -SHRA 11:00am-12:00pm MDT, -TSRA 3:20-3:50pm, -TSRA 6:15-7:15pm.
8/11/2017 7:00 AM 0.39 0.0 0.00 0.0 0.00 Two thunderstorms were observed during the afternoon and early evening. We were on the very southwest edge of a strong thunderstorm moving rapidly from NW-SE across Fort Collins. Brief heavy rain (about 0.12"), a relatively weak wind gust to 22 mph, and no (or very insignificant) hail with this first cell (3:05-4:00pm MDT), which brought fierce wind-driven hail to our north. The second batch of TSRA occurred from 5:15-6:30pm MDT and dropped the remaining rainfall. Thankfully no (or very insignificant) hail observed during the period.
8/12/2017 7:00 AM T 0.0 0.00 0.0 0.00 -SHRA 12:30-1:05pm MDT, clearing skies thereafter.
8/13/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Scattered -TSRA throughout the afternoon. They mainly dropped only sprinkles, but the one around 3:00pm MDT was enough to give us measurable rain.
8/14/2017 7:00 AM 0.02 0.0 0.00 0.0 0.00 Scattered but very weak afternoon -TSRA.
8/15/2017 7:00 AM 0.19 0.0 0.00 0.0 0.00 Thunderstorm with brief torrential rain between 4:30-5:00pm. Vivid and dangerous cloud-to-ground lightening. 0.17" accumulated in 10 minutes.
8/16/2017 7:00 AM T 0.0 0.00 0.0 0.00 Scattered -TSRA 6:00-8:15pm MDT.
8/17/2017 7:00 AM T 0.0 0.00 0.0 0.00 Sprinkles and a rumble of thunder between 6:10-6:30pm MDT.
8/18/2017 7:00 AM T 0.0 0.00 0.0 0.00 Intermittent sprinkles between 1:45-3:00pm MDT.
8/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/22/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Mostly clear for eclipse: temperature dropped 7.3F during the event, going from 80.3F at 10:40am to 73.0F at 12:20pm.
8/23/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/24/2017 7:00 AM T 0.0 0.00 0.0 0.00 Very light sprinkles from a dissipating -SHRA from 6:50-7:00pm MDT.
8/25/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/26/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/27/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/28/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/29/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/30/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
8/31/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/1/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 -SHRA 5:10-5:45pm MDT, -TSRA 9:20-10:00pm.
9/2/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Poor air quality - visibility reduced to 10-15 miles due to smoke/haze from west coast wild fires.
9/3/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued reduced visibility from haze (visibilities < 10 miles during the day) and poor air quality.
9/4/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 High temperature of 97.3F yesterday (9/3/2017). High temperature of 98F at Colorado State University weather station yesterday sets a new record maximum temperature for the entire month of September: previous record high for 9/3 was 94F, previous record monthly maximum was 97F.
9/5/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/6/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/7/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued light smoke and moderately thick haze.
9/8/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Continued hazy.
9/9/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/10/2017 7:00 AM T 0.0 0.00 0.0 0.00 A few widely scattered sprinkles between 2:30-4:30pm MDT.
9/11/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Less haze.
9/12/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/13/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/14/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 -TSRA 1:50-2:55pm MDT.
9/15/2017 7:00 AM T 0.0 0.00 0.0 0.00
9/16/2017 7:00 AM 0.19 0.0 0.00 0.0 0.00 -SHRA 8:10-8:25p MDT with gusty winds and frontal passage; peak wind 32 mph at 8:30p. -TSRA 9:00-9:45p. TSRA with very frequent lightening 10:15-11:15p.
9/17/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Mist and light drizzle in the early morning hours.
9/18/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/19/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/20/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00 Warm and dry: high temp 85F, afternoon relative humidity 10-15%. FROPA in the evening dropped temperatures from 84F at 5:00pm MDT to 61F by 7:00pm MDT.
9/21/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/22/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/23/2017 7:00 AM T 0.0 0.00 0.0 0.00 Scattered, brief light rain showers during the late afternoon.
9/24/2017 7:00 AM 0.81 0.0 0.00 0.0 0.00 Occasion rain between 3:30-7:30pm MDT, heaviest and steadiest between 5:00-7:30pm. Intermittent SHRA and DZ 7:30pm-7:00am.
9/25/2017 7:00 AM 0.40 0.0 0.00 0.0 0.00 Drizzle during the early morning, then overcast and cool. Light but steady rain from 5:00-9:30pm MDT, heaviest between 8:15-9:30pm. Continued light drizzle overnight but mostly cloudy by dawn.
9/26/2017 7:00 AM 0.01 0.0 0.00 0.0 0.00 Had 0.01" in the gauge last evening, presumably from DZ or -SHRA on the morning of 9/25 (after 7:00am MDT observation). Also had a trace this morning from dew but discarded that.
9/27/2017 7:00 AM 0.00 0.0 0.00 0.0 0.00
9/28/2017 7:00 AM 0.49 0.0 0.00 0.0 0.00 Light rain, moderate at times, from 9:00am-12:00pm MDT on 9/27 and again from 2:00am-7:00am 9/28 (observation time).
9/29/2017 7:00 AM 0.03 0.0 0.00 0.0 0.00 -SHRA from morning observation (7:00am MDT 9/28/2017) to about 10:00am, then remaining overcast with widely scattered episodes of light drizzle.
9/30/2017 7:00 AM T 0.0 0.00 0.0 0.00 Occasional mist overnight. Very dense fog from early this morning to observation: visibility about 0.1 mile at times.



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
3/26/2017 1:00 PM Rice- to pea-sized hail from 1:00-1:15pm and again 1:25-1:40pm during a moderate convective rain shower. A trace of hail accumulation. Outside temperature in the upper 40s F. Little wind, no damage. 1/4" Pea Size Rice Rice Hard 40 3min no damage Intermittent True After rain Same time as smaller hail vertical
4/20/2017 6:35 PM TSRA with rice-sized hail during specified time. Heavy rain accompanied hail. Rice Rice Rice White Ice 10 2min no damage Continuous True After rain Same time as smaller hail