Station Overview Station Location
Station Number CO-JF-456 Latitude 39.8385
Station Name Arvada 5.2 WNW Longitude -105.2014
County Jefferson Elevation (ft) 5893



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 18 1.19 0.25 1 0.25 1 0.00 0 0 1 0 0.0 0 0
Nov 18 1.02 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 18 0.72 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 19 0.53 1.45 4 1.45 4 0.00 0 0 4 0 12.3 4 5
Feb 19 0.60 0.44 1 0.44 1 0.00 0 0 1 0 5.0 1 1
March 19 1.73 2.52 4 2.52 4 0.00 0 0 4 0 16.8 3 3
April 19 2.35 0.91 4 0.91 4 0.00 0 0 3 1 8.5 2 2
May 19 2.46 3.64 14 3.00 8 0.64 6 2 8 0 10.0 2 2
June 19 2.03 2.58 5 2.58 5 0.00 0 0 5 0 0.0 0 0
July 19 1.62 1.84 9 1.84 9 0.00 0 0 8 1 0.0 0 0
Aug 19 1.99 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 19 1.25 0.38 1 0.38 1 0.00 0 0 1 0 0.0 0 0
Water Year Totals: 17.49" 14.01" 43 days 13.37" 37 0.64" 6 days 2 35 days 2 days 52.6" 12 days 13 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
10/1/2018
10/2/2018
10/3/2018
10/4/2018
10/5/2018
10/6/2018
10/7/2018
10/8/2018 0.25
10/9/2018
10/10/2018
10/11/2018
10/12/2018
10/13/2018
10/14/2018
10/15/2018
10/16/2018
10/17/2018
10/18/2018
10/19/2018
10/20/2018
10/21/2018
10/22/2018
10/23/2018
10/24/2018
10/25/2018
10/26/2018
10/27/2018
10/28/2018
10/29/2018
10/30/2018
10/31/2018
11/1/2018
11/2/2018
11/3/2018
11/4/2018
11/5/2018
11/6/2018
11/7/2018
11/8/2018
11/9/2018
11/10/2018
11/11/2018
11/12/2018
11/13/2018
11/14/2018
11/15/2018
11/16/2018
11/17/2018
11/18/2018
11/19/2018
11/20/2018
11/21/2018
11/22/2018
11/23/2018
11/24/2018
11/25/2018
11/26/2018
11/27/2018
11/28/2018
11/29/2018
11/30/2018
12/1/2018
12/2/2018
12/3/2018
12/4/2018
12/5/2018
12/6/2018
12/7/2018
12/8/2018
12/9/2018
12/10/2018
12/11/2018
12/12/2018
12/13/2018
12/14/2018
12/15/2018
12/16/2018
12/17/2018
12/18/2018
12/19/2018
12/20/2018
12/21/2018
12/22/2018
12/23/2018
12/24/2018
12/25/2018
12/26/2018
12/27/2018
12/28/2018
12/29/2018
12/30/2018
12/31/2018
Day of YearDaily PrcpMultiday Prcp
1/1/2019 0.38
1/2/2019
1/3/2019
1/4/2019
1/5/2019
1/6/2019
1/7/2019
1/8/2019
1/9/2019
1/10/2019
1/11/2019
1/12/2019 M
1/13/2019
1/14/2019
1/15/2019
1/16/2019
1/17/2019
1/18/2019
1/19/2019 0.31
1/20/2019
1/21/2019
1/22/2019
1/23/2019
1/24/2019 0.38
1/25/2019
1/26/2019
1/27/2019
1/28/2019 0.38
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/2/2019
2/3/2019
2/4/2019
2/5/2019
2/6/2019
2/7/2019 0.44
2/8/2019
2/9/2019
2/10/2019
2/11/2019
2/12/2019
2/13/2019
2/14/2019
2/15/2019
2/16/2019
2/17/2019
2/18/2019
2/19/2019
2/20/2019
2/21/2019
2/22/2019
2/23/2019
2/24/2019
2/25/2019
2/26/2019
2/27/2019
2/28/2019
3/1/2019
3/2/2019
3/3/2019 0.44
3/4/2019
3/5/2019
3/6/2019
3/7/2019
3/8/2019
3/9/2019
3/10/2019
3/11/2019
3/12/2019
3/13/2019
3/14/2019 1.30
3/15/2019
3/16/2019
3/17/2019
3/18/2019
3/19/2019
3/20/2019
3/21/2019
3/22/2019
3/23/2019
3/24/2019
3/25/2019
3/26/2019
3/27/2019
3/28/2019
3/29/2019 0.02
3/30/2019 0.76
3/31/2019
Day of YearDaily PrcpMultiday Prcp
4/1/2019
4/2/2019
4/3/2019
4/4/2019
4/5/2019
4/6/2019
4/7/2019
4/8/2019
4/9/2019
4/10/2019
4/11/2019
4/12/2019
4/13/2019 0.37
4/14/2019
4/15/2019
4/16/2019
4/17/2019
4/18/2019
4/19/2019
4/20/2019
4/21/2019
4/22/2019 0.10
4/23/2019 T
4/24/2019
4/25/2019
4/26/2019
4/27/2019
4/28/2019
4/29/2019
4/30/2019 0.44
5/1/2019
5/2/2019
5/3/2019
5/4/2019
5/5/2019
5/6/2019 **
5/7/2019 **
5/8/2019 0.50
5/9/2019 0.72
5/10/2019 0.20
5/11/2019
5/12/2019
5/13/2019
5/14/2019
5/15/2019
5/16/2019
5/17/2019 **
5/18/2019 **
5/19/2019 0.14
5/20/2019 0.04
5/21/2019 0.85
5/22/2019
5/23/2019 0.20
5/24/2019 0.01
5/25/2019
5/26/2019
5/27/2019
5/28/2019 0.80
5/29/2019 0.18
5/30/2019
5/31/2019
6/1/2019
6/2/2019
6/3/2019
6/4/2019
6/5/2019
6/6/2019 1.00
6/7/2019 0.10
6/8/2019
6/9/2019
6/10/2019
6/11/2019
6/12/2019
6/13/2019
6/14/2019
6/15/2019
6/16/2019
6/17/2019 0.05
6/18/2019 0.45
6/19/2019
6/20/2019
6/21/2019
6/22/2019 0.98
6/23/2019
6/24/2019
6/25/2019
6/26/2019
6/27/2019
6/28/2019
6/29/2019
6/30/2019
Day of YearDaily PrcpMultiday Prcp
7/1/2019 0.21
7/2/2019 0.10
7/3/2019
7/4/2019
7/5/2019 0.01
7/6/2019
7/7/2019
7/8/2019
7/9/2019
7/10/2019
7/11/2019
7/12/2019
7/13/2019
7/14/2019 0.22
7/15/2019 T
7/16/2019
7/17/2019 0.09
7/18/2019 0.01
7/19/2019
7/20/2019
7/21/2019 0.70
7/22/2019 0.50
7/23/2019
7/24/2019
7/25/2019
7/26/2019
7/27/2019
7/28/2019
7/29/2019
7/30/2019
7/31/2019
8/1/2019
8/2/2019
8/3/2019
8/4/2019
8/5/2019
8/6/2019
8/7/2019
8/8/2019
8/9/2019
8/10/2019
8/11/2019
8/12/2019
8/13/2019
8/14/2019
8/15/2019
8/16/2019
8/17/2019
8/18/2019
8/19/2019
8/20/2019
8/21/2019
8/22/2019
8/23/2019
8/24/2019
8/25/2019
8/26/2019
8/27/2019
8/28/2019
8/29/2019
8/30/2019
8/31/2019
9/1/2019
9/2/2019
9/3/2019
9/4/2019
9/5/2019
9/6/2019
9/7/2019
9/8/2019
9/9/2019 0.38
9/10/2019
9/11/2019
9/12/2019
9/13/2019
9/14/2019
9/15/2019
9/16/2019
9/17/2019
9/18/2019
9/19/2019
9/20/2019
9/21/2019
9/22/2019
9/23/2019
9/24/2019
9/25/2019
9/26/2019
9/27/2019
9/28/2019
9/29/2019
9/30/2019



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/8/2018 7:00 AM 0.25 M M M M Cloudy, Misty,38°F,
1/1/2019 10:00 AM 0.38 3.3 0.38 3.3 0.38 Most of snow fell on 12/31/2018. Temperature dropped to about -2°F. Overnight. Mostly calm air.
1/12/2019 11:55 AM M M M 6.5 0.72 Most of snow fell over the past 48 hours.
1/19/2019 7:00 AM 0.31 2.0 0.31 2.0 0.31 Received about 2" of wet snow on afternoon of January 18, 2019. Temp was 30-33°F
1/24/2019 11:10 PM 0.38 2.0 0.38 2.0 0.38 Most of the snow fell between 6:00 AM to 2:00 PM on Thursday, 1/24/2019. Hard early snow made bad road conditions in west Denver.
1/28/2019 11:00 AM 0.38 5.0 0.38 5.0 0.38 Calm air. Windy overnight. Steady snowfall started early on morning of 1/28/19. Temp = 24°F. Temperature started increasing afternoon. Snow melting.
2/7/2019 8:00 AM 0.44 5.0 0.44 5.0 0.44 Had 6" of snow at 8:00 PM on 2/6/19. It still snowed some after that, but the snow settled to 5". Ended sometime overnight.
3/3/2019 11:45 AM 0.44 3.3 0.44 3.3 0.44
3/14/2019 7:00 AM 1.30 6.5 1.13 6.5 1.13 On 3/13/19, started raining, turned to snow at 9:42 AM, received about 0.2" rain before snow. Snow was mostly over by 2:50 PM on 3/13/19. At 11:50 AM, 4.5" snow (0.75" water); 1:25 PM, 5.25" snow (1.0" water); 2:50 PM, 6.5" snow (1.13" water). Pressure starting to rise.
3/29/2019 7:50 AM 0.02 M M M M Steady drizzle overnight continuing this morning.
3/30/2019 8:35 AM 0.76 7.0 0.56 7.0 0.56 Drizzled most of the day on 3/29/19, 0.2" of water (melted ice from gauge), turned to snow late evening. Temperature at measurement time was 33-deg F. Snow settlement was minor. Snow measured on flat area with several consistent readings.
4/13/2019 8:30 AM 0.37 3.5 0.37 3.5 0.37 Was not raining or snowing during observation. All measured precip from melted snow, but some rain preceded the snow - not enough to measure.
4/22/2019 7:00 AM 0.10 M M M M Misting. 40 deg F. Cloudy
4/23/2019 7:00 AM T M M M M
4/30/2019 7:00 AM 0.44 5.0 0.44 5.0 0.44 Total snowfall was probably over 5-inches because some of it melted and the temperature range was 30-33 degrees.
5/9/2019 7:00 AM 0.72 3.5 0.44 3.5 0.44 Total water in gage was 0.72". Also measured 3.5" of snow (settled & some melted). Water content of snow was 0.44". Temp was 31-deg F with light snow falling. The gage had some melted snow in it, but mostly rainfall. Rain turned to snow around 9:25 PM. Snow accumulation on grassy areas, but not on sidewalks or streets. At 6:19 PM the gage had 0.3" of rain; the other 0.42' came after that.
5/10/2019 7:00 AM 0.20 M M M M There was some snow on the ground.
5/20/2019 7:00 AM 0.04 M M M M Was drizzling at time of measurement. Cloudy & cool. Precip over past 3 days: 0.18" (not including some evaporation).
5/21/2019 7:00 AM 0.85 6.5 0.70 6.5 0.70 Rain turned to snow around 6:45 PM. Measured 0.15" rainfall at that time. First snow measurement at 12:15 AM. Was done snowing at 2:00 AM. Little to no wind.
5/23/2019 7:00 AM 0.20 M M M M Cloudy with drizzle. Drizzled throughout the night. Cooler than normal. Ground is saturated.
5/24/2019 7:00 AM 0.01 M M 0.0 0.00
5/28/2019 7:00 AM 0.80 M M M M Strong thunderstorm with heavy rain. The heaviest rain was from 1:50 AM to 2:00 AM. Lightning & thunder started about 1:00 AM. Weather calmed some, then at 3:23 AM another strong thunderstorm hit delivering hail & rain. The strongest of the storm and hail lasted about 13 minutes. Lightning was popping one after another every 5-6 seconds. The largest hail was at least 1/2" diameter (it had melted some by the time I made my observations). It hailed hard. Pelted my west-facing window. Filled our roof gutter within about 5 minutes.
5/29/2019 7:00 AM 0.18 M M M M Cloudy, cool, light rainfall over several hours. Some pea-size soft hail at 3:15 PM on 5/28/2019.
6/6/2019 7:00 AM 1.00 M M M M Thunderstorms started passing through the area around 4:00 PM (6/5/19). Lots of lightning/thunder. Heavy rainfall for 5 minutes starting at 8:21 PM, then steady rainfall until about 10:45 PM. Gage checked at 1:00 AM - no additional rain after that.
6/7/2019 7:50 AM 0.10 M M M M Cloudy with lightning started around 8:00 PM. Light rain from 9:20 to 9:40 PM.
6/17/2019 7:00 AM 0.05 M M M M Scattered light rains with thunderstorms.
6/18/2019 7:00 AM 0.45 M M M M Passing thunderstorms. One storm started at 11:00 PM with 5 minutes of heavy rain.
6/22/2019 7:00 AM 0.98 M M M M First rain started at 1:05 PM. Street gutters flowed.
7/1/2019 8:00 AM 0.21 M M M M 6/30/19: Rainfall started at 5:48 PM, became heavy at 5:53 for 5 minutes, then rained lightly until about 6:30 PM. Another storm moved through around 10:00 PM only producing 0.02" rain.
7/2/2019 7:00 AM 0.10 M M M M Rainfall from 2 passing thunderstorms. One at 3:30 PM and one at 9:30 PM. The later storm provided most of the precip.
7/5/2019 7:00 AM 0.01 M M M M Frequent lightning.
7/14/2019 7:00 AM 0.22 M M M M Thunderstorm.
7/15/2019 7:00 AM T M M M M Scattered thunderstorms.
7/17/2019 7:00 AM 0.09 M M M M Mid-afternoon thunderstorm started when air temperature was 93-degrees. 2:25 PM to 2:40 PM. Enough to generate surface runoff from hard surfaces and a trickle of street gutter flow.
7/18/2019 7:00 AM 0.01 M M M M Brief, intense rainfall with small coverage area. Around 6:20 PM.
7/21/2019 7:00 AM 0.70 M M M M
7/22/2019 7:00 AM 0.50 M M M M Received 0.1" rain around 5:45 PM. Larger storms in the evening.
9/9/2019 7:00 AM 0.38 M M M M Evening thunderstorms. Frequent lightning. Light wind. Temperature cooler than past several days.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
5/6/2019 5/08/2019 7:00 AM 3 0.50 M M Most of this precipitation fell on May 7. Cloudy & cool weather. Periods of light, sustained rain.
5/17/2019 5/19/2019 7:00 AM 3 0.14 M M Cool and cloudy weather.



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
7/5/2019 7:07 PM 3/8" 1/4" Pea Size Rice Mixed 8 3min minor leaf damage Continuous True Before rain Same time as smaller hail 10-20