Station Overview Station Location
Station Number CO-JF-240 Latitude 39.817103
Station Name Arvada 3.8 W Longitude -105.177416
County Jefferson Elevation (ft) 5599



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 14 1.13 1.11 31 1.11 31 0.00 0 0 8 0 0.0 0 0
Nov 14 1.00 1.11 30 1.11 30 0.00 0 0 8 3 9.1 5 11
Dec 14 0.66 0.74 32 0.74 26 0.00 6 0 4 1 8.8 4 6
Jan 15 0.47 0.63 31 0.47 28 0.16 3 1 6 1 6.6 4 8
Feb 15 0.54 2.76 28 2.76 28 0.00 0 0 11 0 33.9 11 16
March 15 1.61 0.40 31 0.40 31 0.00 0 0 4 3 2.0 3 9
April 15 2.19 3.43 30 3.43 30 0.00 0 0 11 2 6.0 3 3
May 15 2.37 6.35 31 6.35 31 0.00 0 0 28 1 3.4 1 1
June 15 2.04 3.97 30 3.97 30 0.00 0 0 15 3 0.0 0 0
July 15 1.60 2.59 31 2.59 31 0.00 0 0 17 2 0.0 0 0
Aug 15 2.02 0.84 31 0.84 31 0.00 0 0 7 3 0.0 0 0
Sept 15 1.17 0.36 30 0.36 30 0.00 0 0 6 1 0.0 0 0
Water Year Totals: 16.80" 24.29" 366 days 24.13" 357 0.16" 9 days 1 125 days 20 days 69.8" 31 days 54 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
10/1/2014 0.00
10/2/2014 0.15
10/3/2014 0.02
10/4/2014 0.00
10/5/2014 0.00
10/6/2014 0.00
10/7/2014 0.00
10/8/2014 0.00
10/9/2014 0.00
10/10/2014 0.77
10/11/2014 0.01
10/12/2014 0.02
10/13/2014 0.07
10/14/2014 0.00
10/15/2014 0.00
10/16/2014 0.00
10/17/2014 0.00
10/18/2014 0.00
10/19/2014 0.00
10/20/2014 0.00
10/21/2014 0.00
10/22/2014 0.03
10/23/2014 0.00
10/24/2014 0.00
10/25/2014 0.00
10/26/2014 0.00
10/27/2014 0.00
10/28/2014 0.04
10/29/2014 0.00
10/30/2014 0.00
10/31/2014 0.00
11/1/2014 0.00
11/2/2014 0.00
11/3/2014 0.19
11/4/2014 0.02
11/5/2014 0.00
11/6/2014 0.00
11/7/2014 0.00
11/8/2014 0.40
11/9/2014 0.00
11/10/2014 0.00
11/11/2014 0.06
11/12/2014 0.19
11/13/2014 0.11
11/14/2014 0.00
11/15/2014 T
11/16/2014 0.08
11/17/2014 0.00
11/18/2014 0.00
11/19/2014 0.00
11/20/2014 0.00
11/21/2014 0.00
11/22/2014 0.00
11/23/2014 0.00
11/24/2014 T
11/25/2014 T
11/26/2014 0.06
11/27/2014 0.00
11/28/2014 0.00
11/29/2014 0.00
11/30/2014 0.00
12/1/2014 T
12/2/2014 0.00
12/3/2014 0.00
12/4/2014 0.00
12/5/2014 0.00
12/6/2014 0.00
12/7/2014 0.00
12/8/2014 0.00
12/9/2014 0.00
12/10/2014 0.00
12/11/2014 0.00
12/12/2014 0.00
12/13/2014 0.00
12/14/2014 0.00
12/15/2014 0.22
12/16/2014 0.00
12/17/2014 0.00
12/18/2014 0.00
12/19/2014 0.00
12/20/2014 0.00
12/21/2014 0.00
12/22/2014 0.25
12/23/2014 0.05
12/24/2014 0.00
12/25/2014 0.00
12/26/2014 0.22 **
12/27/2014 **
12/28/2014 **
12/29/2014 **
12/30/2014 **
12/31/2014 **
Day of YearDaily PrcpMultiday Prcp
1/1/2015 **
1/2/2015 **
1/3/2015 0.16
1/4/2015 0.10
1/5/2015 0.00
1/6/2015 0.00
1/7/2015 0.01
1/8/2015 0.01
1/9/2015 0.02
1/10/2015 0.00
1/11/2015 0.00
1/12/2015 0.00
1/13/2015 T
1/14/2015 0.05
1/15/2015 0.00
1/16/2015 0.00
1/17/2015 0.00
1/18/2015 0.00
1/19/2015 0.00
1/20/2015 0.00
1/21/2015 0.00
1/22/2015 0.28
1/23/2015 0.00
1/24/2015 0.00
1/25/2015 0.00
1/26/2015 0.00
1/27/2015 0.00
1/28/2015 0.00
1/29/2015 0.00
1/30/2015 0.00
1/31/2015 0.00
2/1/2015 0.21
2/2/2015 0.00
2/3/2015 0.00
2/4/2015 0.04
2/5/2015 0.16
2/6/2015 0.00
2/7/2015 0.00
2/8/2015 0.00
2/9/2015 0.00
2/10/2015 0.00
2/11/2015 0.19
2/12/2015 0.00
2/13/2015 0.00
2/14/2015 0.00
2/15/2015 0.00
2/16/2015 0.59
2/17/2015 0.08
2/18/2015 0.00
2/19/2015 0.00
2/20/2015 0.00
2/21/2015 0.22
2/22/2015 0.43
2/23/2015 0.10
2/24/2015 0.00
2/25/2015 0.00
2/26/2015 0.63
2/27/2015 0.11
2/28/2015 0.00
3/1/2015 0.00
3/2/2015 0.00
3/3/2015 0.00
3/4/2015 0.05
3/5/2015 0.01
3/6/2015 0.00
3/7/2015 0.00
3/8/2015 0.00
3/9/2015 0.00
3/10/2015 0.00
3/11/2015 0.00
3/12/2015 0.00
3/13/2015 0.00
3/14/2015 0.00
3/15/2015 0.00
3/16/2015 0.00
3/17/2015 0.00
3/18/2015 0.00
3/19/2015 0.10
3/20/2015 T
3/21/2015 0.00
3/22/2015 0.00
3/23/2015 0.00
3/24/2015 T
3/25/2015 T
3/26/2015 0.24
3/27/2015 0.00
3/28/2015 0.00
3/29/2015 0.00
3/30/2015 0.00
3/31/2015 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2015 0.00
4/2/2015 T
4/3/2015 0.22
4/4/2015 0.00
4/5/2015 0.00
4/6/2015 0.00
4/7/2015 0.00
4/8/2015 0.00
4/9/2015 0.04
4/10/2015 0.00
4/11/2015 0.00
4/12/2015 0.00
4/13/2015 0.00
4/14/2015 0.00
4/15/2015 0.00
4/16/2015 0.03
4/17/2015 1.56
4/18/2015 0.46
4/19/2015 0.12
4/20/2015 0.00
4/21/2015 0.02
4/22/2015 0.00
4/23/2015 T
4/24/2015 0.00
4/25/2015 0.02
4/26/2015 0.03
4/27/2015 0.91
4/28/2015 0.02
4/29/2015 0.00
4/30/2015 0.00
5/1/2015 0.02
5/2/2015 0.02
5/3/2015 0.02
5/4/2015 0.24
5/5/2015 0.21
5/6/2015 0.61
5/7/2015 0.34
5/8/2015 0.41
5/9/2015 1.24
5/10/2015 0.54
5/11/2015 0.01
5/12/2015 0.00
5/13/2015 0.01
5/14/2015 0.08
5/15/2015 0.01
5/16/2015 T
5/17/2015 0.03
5/18/2015 0.10
5/19/2015 0.74
5/20/2015 0.36
5/21/2015 0.05
5/22/2015 0.17
5/23/2015 0.26
5/24/2015 0.49
5/25/2015 0.05
5/26/2015 0.09
5/27/2015 0.03
5/28/2015 0.01
5/29/2015 0.03
5/30/2015 0.18
5/31/2015 0.00
6/1/2015 T
6/2/2015 0.03
6/3/2015 0.00
6/4/2015 0.03
6/5/2015 0.92
6/6/2015 0.24
6/7/2015 0.07
6/8/2015 0.00
6/9/2015 0.00
6/10/2015 1.01
6/11/2015 0.31
6/12/2015 0.74
6/13/2015 0.32
6/14/2015 T
6/15/2015 0.00
6/16/2015 0.02
6/17/2015 0.03
6/18/2015 0.00
6/19/2015 0.05
6/20/2015 0.00
6/21/2015 0.00
6/22/2015 0.00
6/23/2015 0.00
6/24/2015 0.01
6/25/2015 0.08
6/26/2015 0.11
6/27/2015 0.00
6/28/2015 0.00
6/29/2015 T
6/30/2015 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2015 T
7/2/2015 0.05
7/3/2015 0.12
7/4/2015 0.00
7/5/2015 0.02
7/6/2015 0.02
7/7/2015 0.18
7/8/2015 0.13
7/9/2015 0.91
7/10/2015 0.56
7/11/2015 0.17
7/12/2015 0.00
7/13/2015 0.00
7/14/2015 0.12
7/15/2015 0.01
7/16/2015 0.11
7/17/2015 0.02
7/18/2015 0.01
7/19/2015 0.01
7/20/2015 0.00
7/21/2015 T
7/22/2015 0.11
7/23/2015 0.00
7/24/2015 0.00
7/25/2015 0.04
7/26/2015 0.00
7/27/2015 0.00
7/28/2015 0.00
7/29/2015 0.00
7/30/2015 0.00
7/31/2015 0.00
8/1/2015 0.00
8/2/2015 0.00
8/3/2015 0.18
8/4/2015 0.00
8/5/2015 0.00
8/6/2015 0.00
8/7/2015 0.00
8/8/2015 0.00
8/9/2015 0.00
8/10/2015 0.00
8/11/2015 0.00
8/12/2015 0.00
8/13/2015 T
8/14/2015 T
8/15/2015 0.00
8/16/2015 0.11
8/17/2015 0.39
8/18/2015 0.02
8/19/2015 0.06
8/20/2015 0.00
8/21/2015 0.00
8/22/2015 0.00
8/23/2015 0.00
8/24/2015 0.00
8/25/2015 0.00
8/26/2015 0.00
8/27/2015 0.04
8/28/2015 0.04
8/29/2015 0.00
8/30/2015 0.00
8/31/2015 T
9/1/2015 0.08
9/2/2015 0.00
9/3/2015 0.00
9/4/2015 0.01
9/5/2015 T
9/6/2015 0.02
9/7/2015 0.00
9/8/2015 0.10
9/9/2015 0.00
9/10/2015 0.00
9/11/2015 0.00
9/12/2015 0.00
9/13/2015 0.00
9/14/2015 0.00
9/15/2015 0.00
9/16/2015 0.00
9/17/2015 0.00
9/18/2015 0.00
9/19/2015 0.00
9/20/2015 0.00
9/21/2015 0.00
9/22/2015 0.00
9/23/2015 0.00
9/24/2015 0.00
9/25/2015 0.00
9/26/2015 0.00
9/27/2015 0.00
9/28/2015 0.00
9/29/2015 0.04
9/30/2015 0.11



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2014 7:00 AM 0.00 0.0 M M M
10/2/2014 7:00 AM 0.15 M M M M A very mild afternoon thundershower dropped 0.06 of rain between 2:45 PM and 3:15 PM. This was followed by an nightime rain amount of 0.09.
10/3/2014 7:00 AM 0.02 M M M M
10/4/2014 7:00 AM 0.00 0.0 M M M
10/5/2014 7:00 AM 0.00 0.0 M M M
10/6/2014 7:00 AM 0.00 0.0 M M M
10/7/2014 7:00 AM 0.00 0.0 M M M
10/8/2014 7:00 AM 0.00 0.0 M M M
10/9/2014 7:00 AM 0.00 0.0 M M M
10/10/2014 7:00 AM 0.77 M M M M Upslope rain a result of the remnants of Hurricane Simon.
10/11/2014 7:00 AM 0.01 M M M M Early morning residue rain from yesterday's upslope precipitation event.
10/12/2014 7:00 AM 0.02 M M M M
10/13/2014 7:00 AM 0.07 M M M M Cold light rain during afternoon.
10/14/2014 7:00 AM 0.00 0.0 M M M
10/15/2014 7:00 AM 0.00 0.0 M M M
10/16/2014 7:00 AM 0.00 0.0 M M M
10/17/2014 7:00 AM 0.00 0.0 M M M
10/18/2014 7:00 AM 0.00 0.0 M M M
10/19/2014 7:00 AM 0.00 0.0 M M M
10/20/2014 7:00 AM 0.00 0.0 M M M
10/21/2014 7:00 AM 0.00 0.0 M M M
10/22/2014 7:00 AM 0.03 M M M M Drizzle very early in the morning. A few wet spots in the area at dawn.
10/23/2014 7:00 AM 0.00 0.0 M M M
10/24/2014 7:00 AM 0.00 0.0 M M M
10/25/2014 7:00 AM 0.00 0.0 M M M
10/26/2014 7:00 AM 0.00 0.0 M M M
10/27/2014 7:00 AM 0.00 0.0 M M M
10/28/2014 7:00 AM 0.04 M M M M A brief light rain in afternoon. Patchy frost this morning but not quite a killing frost.
10/29/2014 7:00 AM 0.00 0.0 M M M
10/30/2014 7:00 AM 0.00 0.0 M M M
10/31/2014 7:00 AM 0.00 0.0 M M M
11/1/2014 7:00 AM 0.00 0.0 M M M
11/2/2014 7:00 AM 0.00 0.0 M M M
11/3/2014 7:00 AM 0.19 M M M M Heavy rain during the first 10 minutes then a light drizzle for the remainder of the precipitation event. Light drizzle at the end of the observation period.
11/4/2014 7:00 AM 0.02 M M M M Light drizzle at beginning of observation period.
11/5/2014 7:00 AM 0.00 0.0 M M M
11/6/2014 7:00 AM 0.00 0.0 M M M
11/7/2014 7:00 AM 0.00 0.0 M M M
11/8/2014 7:00 AM 0.40 M M M M Heavy rain at beginning of event.
11/9/2014 7:00 AM 0.00 0.0 M M M
11/10/2014 7:00 AM 0.00 0.0 M M M
11/11/2014 7:00 AM 0.06 1.3 0.08 1.3 0.08 Frontal passage at 9:54 AM. Temperature was 62 F prior to frontal passage and fell to 18 degrees by 3PM
11/12/2014 7:00 AM 0.19 4.2 0.22 5.5 M Snowing at the end of the observation period and it snowed during the entire day.
11/13/2014 7:00 AM 0.11 1.0 0.11 4.0 M
11/14/2014 7:00 AM 0.00 0.0 0.00 4.0 M
11/15/2014 7:00 AM T T T 4.0 M Snowing at beginning of observation
11/16/2014 7:00 AM 0.08 2.0 0.08 4.5 M
11/17/2014 7:00 AM 0.00 0.0 0.00 3.5 M
11/18/2014 7:00 AM 0.00 0.0 0.00 3.0 M
11/19/2014 7:00 AM 0.00 0.0 0.00 1.0 M Snow gradually melting from the warmer temperatures.
11/20/2014 7:00 AM 0.00 0.0 0.00 0.5 M
11/21/2014 7:00 AM 0.00 0.0 M M M
11/22/2014 7:00 AM 0.00 0.0 M M M
11/23/2014 7:00 AM 0.00 0.0 M M M
11/24/2014 7:00 AM T T T T T Flurries that never amounted to much.
11/25/2014 7:00 AM T T T T T Snow squall moves through the area bringing brief snow flurries with no accumulation.
11/26/2014 7:00 AM 0.06 0.6 0.06 0.5 0.06 Mixture of snow and sleet that eventually turned to very light snow before it ended by dawn.
11/27/2014 7:00 AM 0.00 0.0 M M M
11/28/2014 7:00 AM 0.00 0.0 M M M
11/29/2014 7:00 AM 0.00 0.0 M M M
11/30/2014 7:00 AM 0.00 0.0 M M M
12/1/2014 7:00 AM T T T T T Flurries that only amount to a trace.
12/2/2014 7:00 AM 0.00 0.0 M M M
12/3/2014 7:00 AM 0.00 0.0 M M M
12/4/2014 7:00 AM 0.00 0.0 M M M
12/5/2014 7:00 AM 0.00 0.0 M M M
12/6/2014 7:00 AM 0.00 0.0 M M M
12/7/2014 7:00 AM 0.00 0.0 M M M
12/8/2014 7:00 AM 0.00 0.0 M M M
12/9/2014 7:00 AM 0.00 0.0 M M M
12/10/2014 7:00 AM 0.00 0.0 M M M
12/11/2014 7:00 AM 0.00 0.0 M M M
12/12/2014 7:00 AM 0.00 0.0 M M M
12/13/2014 7:00 AM 0.00 0.0 M M M
12/14/2014 7:00 AM 0.00 0.0 M M M
12/15/2014 7:00 AM 0.22 1.5 0.22 0.5 M Wet snow that melted as it hit the ground. Total snowfall is an estimate since much it did not remain on the ground long enough for a measurement.
12/16/2014 7:00 AM 0.00 0.0 0.00 0.5 M
12/17/2014 7:00 AM 0.00 0.0 M M M
12/18/2014 7:00 AM 0.00 0.0 M M M
12/19/2014 7:00 AM 0.00 0.0 M M M
12/20/2014 7:00 AM 0.00 0.0 M M M
12/21/2014 7:00 AM 0.00 0.0 M M M
12/22/2014 7:00 AM 0.25 0.2 0.03 0.5 M Precipitation begins as rain and turns to snow late during the precipitation event. Rain is light to moderate during the first two hours of the event. The majority of precipitation fell as rain. During the event 80 percent of the precipitation fell as rain.
12/23/2014 7:00 AM 0.05 0.8 0.05 1.0 0.05 Snow came in during the afternoon and snowed moderately during the event..
12/24/2014 7:00 AM 0.00 0.0 0.00 0.5 M
12/25/2014 7:00 AM 0.00 0.0 M M M
12/26/2014 7:00 AM 0.22 6.3 0.22 6.5 0.22 First wave of snow ended at 10:30 PM. Second wave of snow started after midnight. It was snowing at the time of this observation.
1/4/2015 7:00 AM 0.10 2.1 0.10 5.2 M
1/5/2015 7:00 AM 0.00 0.0 0.00 4.5 M
1/6/2015 7:00 AM 0.00 0.0 0.00 3.0 M
1/7/2015 7:00 AM 0.01 T T 0.0 M Freezing drizzle/fog overnight. It had turn to a few flakes for snow falling just at the end of the observation period. Chinook winds during the day yesterday caused three inches of snow cover at the observation location to melt. Now only bare ground remains.
1/8/2015 7:00 AM 0.01 T 0.01 T 0.01 Freezing drizzle that switched over to very light snow at the beginning of the observation period and lasted for about 1 hour before it quit.
1/9/2015 7:00 AM 0.02 0.2 0.02 0.5 0.02 Light snow. Duration not recorded.
1/10/2015 7:00 AM 0.00 0.0 M M M
1/11/2015 7:00 AM 0.00 0.0 M M M
1/12/2015 7:00 AM 0.00 0.0 M M M
1/13/2015 7:00 AM T M M M M Very light snowfall for a very brief amount of time.
1/14/2015 7:00 AM 0.05 0.3 0.05 0.5 0.05 Light snow. Duration not recorded.
1/15/2015 7:00 AM 0.00 0.0 M M M
1/16/2015 7:00 AM 0.00 0.0 M M M
1/17/2015 7:00 AM 0.00 0.0 M M M
1/18/2015 7:00 AM 0.00 0.0 M M M
1/19/2015 7:00 AM 0.00 0.0 M M M
1/20/2015 7:00 AM 0.00 0.0 M M M
1/21/2015 7:00 AM 0.00 0.0 M M M
1/22/2015 7:00 AM 0.28 4.0 0.28 4.0 0.28 First flakes began at 07:10 AM. However, the majority of the snow fell between 10 AM and 2 PM. Snowfall was moderate at times. Snow would melt on streets until mid-afternoon where it pack down on streets making next day's morning commute very tricky.
1/23/2015 7:00 AM 0.00 0.0 0.00 2.5 M
1/24/2015 7:00 AM 0.00 0.0 0.00 1.0 M
1/25/2015 7:00 AM 0.00 0.0 M M M
1/26/2015 7:00 AM 0.00 0.0 M M M
1/27/2015 7:00 AM 0.00 0.0 M M M
1/28/2015 7:00 AM 0.00 0.0 M M M
1/29/2015 7:00 AM 0.00 0.0 M M M
1/30/2015 7:00 AM 0.00 0.0 M M M
1/31/2015 7:00 AM 0.00 0.0 M M M
2/1/2015 7:00 AM 0.21 3.5 0.21 3.5 0.21
2/2/2015 7:00 AM 0.00 0.0 0.00 2.0 M
2/3/2015 7:00 AM 0.00 0.0 0.00 0.0 M Snow cover melted quickly. Bare ground now present.
2/4/2015 7:00 AM 0.04 0.3 0.04 0.5 0.04 Small flakes falling at moderate intensity at the time of observation.
2/5/2015 7:00 AM 0.16 1.9 0.16 2.0 0.16 Snow that fell was wet and some melting occurred prior to 7 AM observation. Timing of snowfall is unknown.
2/6/2015 7:00 AM 0.00 0.0 0.00 T M
2/7/2015 7:00 AM 0.00 0.0 M M M
2/8/2015 7:00 AM 0.00 0.0 M M M
2/9/2015 7:00 AM 0.00 0.0 M M M
2/10/2015 7:00 AM 0.00 0.0 M M M
2/11/2015 7:00 AM 0.19 0.1 0.03 T 0.03 A mixture of snow and rain. It fell mostly as rain. Snow cover amounted to a dusting making grass areas white but not much more.
2/12/2015 7:00 AM 0.00 0.0 M M M
2/13/2015 7:00 AM 0.00 0.0 M M M
2/14/2015 7:00 AM 0.00 0.0 M M M
2/15/2015 7:00 AM 0.00 0.0 M M M
2/16/2015 7:00 AM 0.59 5.8 0.59 6.0 0.59 An unusual wet snowfall for February. It was still snowing at the end of the observation period.
2/17/2015 7:00 AM 0.08 2.0 0.08 5.5 M It was snowing at the beginning of the observation period.
2/18/2015 7:00 AM 0.00 0.0 0.00 5.0 M
2/19/2015 7:00 AM 0.00 0.0 0.00 1.5 M
2/20/2015 7:00 AM 0.00 0.0 M M M
2/21/2015 7:00 AM 0.22 2.2 0.22 2.0 0.22 Precipitation started as rain but within one half hour became light snow. Very wet snow, 1:10 ratio. A snow more typical for March/April than February.
2/22/2015 7:00 AM 0.43 5.7 0.43 8.0 M Light snow off and on throughout the day and night after snow began. However, between 3:25 and 3:45 visibility drop to one hundred feet and snow was heavy. Winds were less than 20 mph so no blizzard conditions. Snowing at end of observation time.
2/23/2015 7:00 AM 0.10 1.2 0.10 7.1 M Storm lingers until after midnight. Snowfall very light towards evening. Snowing at beginning of observation period. Total of 9.1 inches of snow at the end of the precipitation event.
2/24/2015 7:00 AM 0.00 0.0 0.00 7.0 M
2/25/2015 7:00 AM 0.00 0.0 0.00 4.0 M
2/26/2015 7:00 AM 0.63 8.9 0.63 10.8 M Heavy snow fell quickly in the first few hours then tapered off during the evening hours. Snowing at end of observation period.
2/27/2015 7:00 AM 0.11 2.3 0.11 10.5 M Snowing at the beginning of observation period. Snow gradually tapers off to a few flurries during the day.
2/28/2015 7:00 AM 0.00 0.0 0.00 10.0 M
3/1/2015 7:00 AM 0.00 0.0 0.00 9.5 M
3/2/2015 7:00 AM 0.00 0.0 0.00 9.0 M
3/3/2015 7:00 AM 0.00 0.0 0.00 8.5 M
3/4/2015 7:00 AM 0.05 1.4 0.05 9.5 M Just a few flakes of snow occasionally during the day. The snow did not begin in earnest until after 7 PM. The bulk of the snow occurred after midnight. The ending time is approximate.
3/5/2015 7:00 AM 0.01 0.2 0.01 9.0 M Periods of intermittent snow flurries until about 4 PM.
3/6/2015 7:00 AM 0.00 0.0 0.00 8.5 M
3/7/2015 7:00 AM 0.00 0.0 0.00 4.5 M
3/8/2015 7:00 AM 0.00 0.0 0.00 2.5 M
3/9/2015 7:00 AM 0.00 0.0 M M M
3/10/2015 7:00 AM 0.00 0.0 M M M
3/11/2015 7:00 AM 0.00 0.0 M M M
3/12/2015 7:00 AM 0.00 0.0 M M M
3/13/2015 7:00 AM 0.00 0.0 M M M
3/14/2015 7:00 AM 0.00 0.0 M M M
3/15/2015 7:00 AM 0.00 0.0 M M M
3/16/2015 7:00 AM 0.00 0.0 M M M
3/17/2015 7:00 AM 0.00 0.0 M M M
3/18/2015 7:00 AM 0.00 0.0 M M M
3/19/2015 7:00 AM 0.10 M M M M All rain during the precipitation event. Although a few drops of rain occurred at 03:25, the rain did not become significant until 6:40 PM. However, even during the evening hours the rain was intermittent. It was a very fine drizzle at the time the observation period ended.
3/20/2015 7:00 AM T 0.0 0.00 0.0 M A very fine drizzle was observed at the beginning of the observation period but it stop drizzling soon afterwards.
3/21/2015 7:00 AM 0.00 0.0 M M M
3/22/2015 7:00 AM 0.00 0.0 M M M
3/23/2015 7:00 AM 0.00 0.0 M M M
3/24/2015 7:00 AM T 0.0 0.00 0.0 0.00 Trace of precipitation sometime after midnight. The time was not recorded.
3/25/2015 7:00 AM T 0.0 0.00 0.0 0.00 Just started to rain prior to the end of the observation period. Rain pick up in intensity after 7 AM. Will report totals tomorrow.
3/26/2015 7:00 AM 0.24 0.4 0.24 0.5 0.24 Precipitation began as rain and quickly changed to snow about one hour after it began and the snow remained moderate until the end of the event. skies became partly cloudy by 3:30 PM. Snow melted quickly without much accumulation.
3/27/2015 7:00 AM 0.00 0.0 M M M
3/28/2015 7:00 AM 0.00 0.0 M M M
3/29/2015 7:00 AM 0.00 0.0 M M M
3/30/2015 7:00 AM 0.00 0.0 M M M
3/31/2015 7:00 AM 0.00 0.0 M M M
4/1/2015 7:00 AM 0.00 0.0 M M M
4/2/2015 7:00 AM T M M M M An occasional drop or two of rain during afternoon from high based status clouds. Clouds are a harbinger of an early spring snow storm that is forecasted for the next day.
4/3/2015 7:00 AM 0.22 2.3 0.22 2.5 0.22 Rain changing to snow over night.
4/4/2015 7:00 AM 0.00 0.0 M M M
4/5/2015 7:00 AM 0.00 0.0 M M M
4/6/2015 7:00 AM 0.00 0.0 M M M
4/7/2015 7:00 AM 0.00 0.0 M M M
4/8/2015 7:00 AM 0.00 0.0 M M M
4/9/2015 7:00 AM 0.04 M M M M A very brief rain shower with one report of thunder.
4/10/2015 7:00 AM 0.00 0.0 M M M
4/11/2015 7:00 AM 0.00 0.0 M M M
4/12/2015 7:00 AM 0.00 0.0 M M M
4/13/2015 7:00 AM 0.00 0.0 M M M
4/14/2015 7:00 AM 0.00 0.0 M M M
4/15/2015 7:00 AM 0.00 0.0 M M M
4/16/2015 7:00 AM 0.03 0.4 0.03 0.5 0.03 Snowing at time of observation.
4/17/2015 7:00 AM 1.56 3.3 0.50 3.5 0.50 Rain mixed with snow frequently falling at a heavy rate through out the observation period. Temperature was never higher than 38 F throughout the day. Measured snow after it changed to rain (about 11 AM). Melted values represent the water content of the snow. The remaining amount of precipitation in gauge is from the rain that fell. precipitation fell during the entire 24 hour observation period.
4/18/2015 7:00 AM 0.46 T T T T Rain mixed with a little snow. Snow was in trace amounts. True ice pellets (not graupel) fell during the last hour of the precipitation event.
4/19/2015 7:00 AM 0.12 M M M M Moderate rain fell in the early morning hours.
4/20/2015 7:00 AM 0.00 0.0 M M M
4/21/2015 7:00 AM 0.02 M M M M Brief moderate shower dropping a couple of hundredths of rain.
4/22/2015 7:00 AM 0.00 0.0 M M M
4/23/2015 7:00 AM T M M M M Just a few drops during the evening hours.
4/24/2015 7:00 AM 0.00 0.0 M M M
4/25/2015 7:00 AM 0.02 0.0 M M M Brief shower in the afternoon.
4/26/2015 7:00 AM 0.03 M M M M Rain is intermittent at the beginning and doesn't become constant until near the end of the observation period.
4/27/2015 7:00 AM 0.91 M M M M Raining at beginning of observation but begins in earnest at 08:30. Too many periods of heavier precipitation to designated one time period for being the heaviest rain. Raining at end of observation period.
4/28/2015 7:00 AM 0.02 M M M M Raining at the beginning of observation period but it was a light/drizzle kind of rain.
4/29/2015 7:00 AM 0.00 0.0 M M M
4/30/2015 7:00 AM 0.00 0.0 M M M
5/1/2015 7:00 AM 0.02 M M M M Brief shower in afternoon.
5/2/2015 7:00 AM 0.02 M M M M Brief shower in afternoon.
5/3/2015 7:00 AM 0.02 M M M M Brief shower in afternoon.
5/4/2015 7:00 AM 0.24 M M M M Early morning rain that fall hard enough to wake me from my sleep.
5/5/2015 7:00 AM 0.21 M M M M Moderate rain during the late evening hours. No thunder observed.
5/6/2015 7:00 AM 0.61 M M M M Heavy rain with thunder beginning in the early afternoon. Rain ended for several hours. Rain began again at 9:20 as a light rain shower that ended at 10:30 PM. Times shown below reflect the beginning of the rain in the afternoon and when it ended late in the evening.
5/7/2015 7:00 AM 0.34 M M M M Heavy rain in the afternoon with thunder.
5/8/2015 7:00 AM 0.41 M M M M Light to moderate rain showers throughout the precipitation event. Raining at the end of the observation period.
5/9/2015 7:00 AM 1.24 M M M M Rain continuously throughout the day. Light to moderate rainfall throughout the observation period.
5/10/2015 7:00 AM 0.54 3.4 0.35 3.4 0.35 Rain at the beginning of the observation but turned to snow beginning at 6:50PM and continued as snow until end. Rainfall measured 0.19 inches. Snowfall made up the remainder of the total. Precipitation was light through the entire observation period.
5/11/2015 7:00 AM 0.01 M M M M Very light rain fell briefly in the late afternoon.
5/12/2015 7:00 AM 0.00 0.0 M M M
5/13/2015 7:00 AM 0.01 M M M M Brief thundershower moving moving from the south western portion of the front range to the northeast briefly drops some light rain. Main part of the shower moves just to the south and east of the observation location.
5/14/2015 7:00 AM 0.08 M M M M Late afternoon rain shower with some thunder.
5/15/2015 7:00 AM 0.01 M M M M
5/16/2015 7:00 AM T M M M M
5/17/2015 7:00 AM 0.03 M M M M Brief rain shower.
5/18/2015 7:00 AM 0.10 M M M M Several brief showers throughout the afternoon but the duration information reflects the time of the shower that brought the majority of the recorded rainfall.
5/19/2015 7:00 AM 0.74 M M M M Light to moderate rain began last night and continues through the end of the observation period. Heaviest precipitation period reported was only one od several periods throughout the night.
5/20/2015 7:00 AM 0.36 M M M M Heavy rainfall during the night. Raining at the end of the observation period.
5/21/2015 7:00 AM 0.05 M M M M Intermittent rainfall amounted to either mist or a very light drizzle during the entire observation period. Times reported are for the period when it rained for the longest time.
5/22/2015 7:00 AM 0.17 M M M M Mild thundershower with no hail.
5/23/2015 7:00 AM 0.26 M M M M Upslope rain throughout most of the day.
5/24/2015 7:00 AM 0.49 M M M M Two lines of thundershowers moved through the observation area in the afternoon and evening. The afternoon shower had the heavier amount of rainfall and small hail. The hail was slightly larger than rice. The times for the afternoon rainshower are reported here. The evening shower occurred at 07:25 to 07:40 PM and had less rain a one minute of hail the size of rice grains.
5/25/2015 7:00 AM 0.05 M M M M Brief thundershower without hail.
5/26/2015 7:00 AM 0.09 M M M M Two thundershowers the first began at 03:05 PM and lasted 20 minutes and the second thundershower's time of occurrence is listed below. It brought the majority of the rain.
5/27/2015 7:00 AM 0.03 M M M M Two occurrences of showers. The first occurred with thunder late in the afternoon. The times are reported in the duration information. A second occurrence of brief light showers without thunder occurred between 06:35 and 06:45 PM. The majority of the rain reported occurred during the afternoon.
5/28/2015 7:00 AM 0.01 M M M M Brief shower in afternoon. Time not recorded.
5/29/2015 7:00 AM 0.03 M M M M Brief thundershower in afternoon. Time not recorded.
5/30/2015 7:00 AM 0.18 M M M M Thunderstorm with graupel.
5/31/2015 7:00 AM 0.00 0.0 M M M
6/1/2015 7:00 AM T M M M M Just a trace of rain in early morning hours.
6/2/2015 7:00 AM 0.03 M M M M Two brief showers at two different times. One wave of showers passed through at 1:30 PM and next wave at about 5 PM
6/3/2015 7:00 AM 0.00 0.0 M M M
6/4/2015 7:00 AM 0.03 M M M M Light rain and pea size hail with an afternoon thundershower. Very little damage with the brief period of hail. A few shredded leaves. Please see hail report.
6/5/2015 7:00 AM 0.92 M M M M Quarter sized hail and torrential rains in thunderstorms that began after nightfall. Two periods of rain associated with these storms. The first line of storms began at 09:10 PM and ended at 09:55 PM. This line of storms brought 0.35 inches of rain and quarter sized hail (see hail report). Second wave of storms began at 10:35 and lasted about one hour. This line of storm brought torrential rainfall that added the remaining 0.57 inches of rain. Only one or two hail stones in this line of storms.
6/6/2015 7:00 AM 0.24 M M M M Two shower events. The first occurred at 12:45 PM and dropped 0.02 inches during the fifteen minute period. The second event was a thundershower; occurred during the early evening and produced the majority of the rain received during the day. The times for the afternoon rain are shown below.
6/7/2015 7:00 AM 0.07 M M M M Mild thundershower during the early evening.
6/8/2015 7:00 AM 0.00 0.0 M M M
6/9/2015 7:00 AM 0.00 0.0 M M M
6/10/2015 7:00 AM 1.01 M M M M Moderate thundershower dropped a lot of precipitation in a short amount of time (see significant weather report). The amount of rain dropped in the short amount of time has not been seen at this location since records have been kept.
6/11/2015 7:00 AM 0.31 M M M M All but 0.01 of the rain fell during an afternoon thunderstorm that passed directly over the observation location. A brief shower the next morning before dawn dropped the remaining rain.
6/12/2015 7:00 AM 0.74 M M M M Thundershower with heavy rainfall.
6/13/2015 7:00 AM 0.32 M M M M Raining at the beginning of the observation period. At the point of heaviest precipitation, the rainfall was heavy falling at a rate of 0.01 per minute.
6/14/2015 7:00 AM T M M M M Trace of rain in the afternoon.
6/15/2015 7:00 AM 0.00 0.0 M M M
6/16/2015 7:00 AM 0.02 M M M M Brief light rain without thunder at sunset.
6/17/2015 7:00 AM 0.03 M M M M
6/18/2015 7:00 AM 0.00 0.0 M M M
6/19/2015 7:00 AM 0.05 M M M M Late evening thundershower passes overhead giving a brief amount of rain without hail.
6/20/2015 7:00 AM 0.00 0.0 M M M
6/21/2015 7:00 AM 0.00 0.0 M M M
6/22/2015 7:00 AM 0.00 0.0 M M M
6/23/2015 7:00 AM 0.00 0.0 M M M
6/24/2015 7:00 AM 0.01 M M M M Big drops but not much rain. Thunder observed but no hail at this location.
6/25/2015 7:00 AM 0.08 M M M M The first thunderstorm began at 4:26 PM and lasted about ten minutes. It dropped 0.03 inches at the observation station. This same storm later dropped as much as 2.5 inches in areas east of the downtown Denver area. A second thundershower began after 8 PM and dropped 0.05 inches of rain. The begin and end times reflect the second precipitation event.
6/26/2015 7:00 AM 0.11 M M M M Brief shower with moderate rain during the evening.
6/27/2015 7:00 AM 0.00 0.0 M M M
6/28/2015 7:00 AM 0.00 0.0 M M M
6/29/2015 7:00 AM T M M M M Few drops of rain during late afternoon.
6/30/2015 7:00 AM 0.00 0.0 M M M
7/1/2015 7:00 AM T M M M M Light shower with no thunder observed.
7/2/2015 7:00 AM 0.05 M M M M A light shower in afternoon.
7/3/2015 7:00 AM 0.12 M M M M Afternoon thundershowers.
7/4/2015 7:00 AM 0.00 0.0 M M M
7/5/2015 7:00 AM 0.02 M M M M Brief, light shower in afternoon.
7/6/2015 7:00 AM 0.02 M M M M Light drizzle from upslope. Drizzling at observation time.
7/7/2015 7:00 AM 0.18 M M M M Light rain off and on throughout the day with a heavier period of rain occurring just after 10 PM.
7/8/2015 7:00 AM 0.13 M M M M Light rain off and on throughout the day.
7/9/2015 7:00 AM 0.91 M M M M Rain off and on throughout the day but very heavy during the afternoon.
7/10/2015 7:00 AM 0.56 M M M M Thundershower overhead drop more than one half inch of rain in a little over 30 minutes. It was directly overhead because lightning and thunder occurred simultaneously.
7/11/2015 7:00 AM 0.17 M M M M Late evening thundershower with frequent lightning.
7/12/2015 7:00 AM 0.00 0.0 M M M
7/13/2015 7:00 AM 0.00 0.0 M M M
7/14/2015 7:00 AM 0.12 M M M M Showers with no thunder observed.
7/15/2015 7:00 AM 0.01 M M M M Brief thunder shower in afternoon.
7/16/2015 7:00 AM 0.11 M M M M
7/17/2015 7:00 AM 0.02 M M M M
7/18/2015 7:00 AM 0.01 M M M M
7/19/2015 7:00 AM 0.01 M M M M
7/20/2015 7:00 AM 0.00 0.0 M M M
7/21/2015 7:00 AM T M M M M
7/22/2015 7:00 AM 0.11 M M M M Quick moving storm cell.
7/23/2015 7:00 AM 0.00 0.0 M M M
7/24/2015 7:00 AM 0.00 0.0 M M M
7/25/2015 7:00 AM 0.04 M M M M Brief light rain in afternoon. Time not recorded.
7/26/2015 7:00 AM 0.00 0.0 M M M
7/27/2015 7:00 AM 0.00 0.0 M M M
7/28/2015 7:00 AM 0.00 0.0 M M M
7/29/2015 7:00 AM 0.00 0.0 M M M
7/30/2015 7:00 AM 0.00 0.0 M M M
7/31/2015 7:00 AM 0.00 0.0 M M M
8/1/2015 7:00 AM 0.00 0.0 M M M
8/2/2015 7:00 AM 0.00 0.0 M M M
8/3/2015 7:00 AM 0.18 M M M M Moderate shower in afternoon. No lightning or thunder observed.
8/4/2015 7:00 AM 0.00 0.0 M M M
8/5/2015 7:00 AM 0.00 0.0 M M M
8/6/2015 7:00 AM 0.00 0.0 M M M
8/7/2015 7:00 AM 0.00 0.0 M M M
8/8/2015 7:00 AM 0.00 0.0 M M M
8/9/2015 7:00 AM 0.00 0.0 M M M
8/10/2015 7:00 AM 0.00 0.0 M M M
8/11/2015 7:00 AM 0.00 0.0 M M M
8/12/2015 7:00 AM 0.00 0.0 M M M
8/13/2015 7:00 AM T M M M M Brief afternoon raindrops.
8/14/2015 7:00 AM T M M M M Brief afternoon raindrops.
8/15/2015 7:00 AM 0.00 0.0 M M M
8/16/2015 7:00 AM 0.11 M M M M Thundershowers at 11:30 PM . Observed thunder at 11:30, ten minutes after it began to rain
8/17/2015 7:00 AM 0.39 M M M M Afternoon heavy thundershower passes quickly through the area. Duration information reflects the time of occurrance. 0.31 inches fell during the afternoon. A small amount of rain fell during the night. The time of occurrence was not recorded. However, weather observers reports suggest that the core of the storm passed to the south of this observation station. 0.08 inches fell during the night.
8/18/2015 7:00 AM 0.02 M M M M Brief shower during the night. Time not recorded
8/19/2015 7:00 AM 0.06 M M M M Intermittent upslope rain. Duration information shows the actual time the rain started and estimated time it stopped based on TV model predictions. It did not rain continuously during the duration period.
8/20/2015 7:00 AM 0.00 0.0 M M M
8/21/2015 7:00 AM 0.00 0.0 M M M
8/22/2015 7:00 AM 0.00 0.0 M M M
8/23/2015 7:00 AM 0.00 0.0 M M M
8/24/2015 7:00 AM 0.00 0.0 M M M
8/25/2015 7:00 AM 0.00 0.0 M M M
8/26/2015 7:00 AM 0.00 0.0 M M M
8/27/2015 7:00 AM 0.04 M M M M
8/28/2015 7:00 AM 0.04 M M M M
8/29/2015 7:00 AM 0.00 0.0 M M M
8/30/2015 7:00 AM 0.00 0.0 M M M
8/31/2015 7:00 AM T M M M M
9/1/2015 7:00 AM 0.08 M M M M
9/2/2015 7:00 AM 0.00 0.0 M M M
9/3/2015 7:00 AM 0.00 0.0 M M M
9/4/2015 7:00 AM 0.01 M M M M
9/5/2015 7:00 AM T M M M M
9/6/2015 7:00 AM 0.02 M M M M
9/7/2015 7:00 AM 0.00 0.0 M M M
9/8/2015 7:00 AM 0.10 M M M M Breezy thundershower goes quickly through the area.
9/9/2015 7:00 AM 0.00 0.0 M M M
9/10/2015 7:00 AM 0.00 0.0 M M M
9/11/2015 7:00 AM 0.00 0.0 M M M
9/12/2015 7:00 AM 0.00 0.0 M M M
9/13/2015 7:00 AM 0.00 0.0 M M M
9/14/2015 7:00 AM 0.00 0.0 M M M
9/15/2015 7:00 AM 0.00 0.0 M M M
9/16/2015 7:00 AM 0.00 0.0 M M M
9/17/2015 7:00 AM 0.00 0.0 M M M
9/18/2015 7:00 AM 0.00 0.0 M M M
9/19/2015 7:00 AM 0.00 0.0 M M M
9/20/2015 7:00 AM 0.00 0.0 M M M
9/21/2015 7:00 AM 0.00 0.0 M M M
9/22/2015 7:00 AM 0.00 0.0 M M M
9/23/2015 7:00 AM 0.00 0.0 M M M
9/24/2015 7:00 AM 0.00 0.0 M M M
9/25/2015 7:00 AM 0.00 0.0 M M M
9/26/2015 7:00 AM 0.00 0.0 M M M
9/27/2015 7:00 AM 0.00 0.0 M M M
9/28/2015 7:00 AM 0.00 0.0 M M M
9/29/2015 7:00 AM 0.04 M M M M
9/30/2015 7:00 AM 0.11 M M M M Fast moving thunderstorm dumped rain and hail in about ten minutes. Hail was rice size (see hail report).



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
12/26/2014 1/03/2015 7:00 AM 9 0.16 3.4 M



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
5/24/2015 1:10 PM No pad exposed to hail. Hail was too small 1/4" Pea Size Rice Rice Soft|White Ice 3 1min no damage Continuous True After rain Same time as smaller hail 0
6/3/2015 2:30 PM No hail pad exposed for this thundershower. 1/4" Pea Size Rice Rice Soft|White Ice 3 3min minor leaf damage True Same time as rain After smaller hail 10-20
6/4/2015 9:40 PM No hail pad exposed for this storm. This storm marks the largest hail stones observed at this location in the last five years. Although hail stones were large, damage was light at this location due to the fact that the large hail stones were infrequent. They were falling at the rate of one dozen per minute. Smaller stones were falling more frequently than the larger stones during the eight minute duration of the storm. 1" Quarter Size 1/4" Pea Size Rice Mixed|White Ice 8 1min shredded leaves Continuous True After rain After smaller hail 10-20
9/29/2015 4:35 PM No pad exposed to hail. 1/4" Pea Size Rice Rice Soft 2 1min no damage Intermittent True Same time as rain Same time as smaller hail