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 12 1.13 1.08 31 1.08 31 0.00 0 0 9 1 4.4 2 2
Nov 12 1.00 0.21 30 0.21 30 0.00 0 0 1 1 0.3 1 1
Dec 12 0.66 0.25 31 0.25 31 0.00 0 0 4 4 8.3 4 10
Jan 13 0.47 0.38 31 0.38 31 0.00 0 0 2 3 5.1 1 6
Feb 13 0.54 1.12 28 1.12 28 0.00 0 0 9 2 18.2 8 14
March 13 1.61 1.65 31 1.65 31 0.00 0 0 6 2 18.7 6 13
April 13 2.19 2.77 30 2.77 30 0.00 0 0 9 3 36.7 7 8
May 13 2.37 2.26 31 2.26 31 0.00 0 0 12 2 5.7 2 2
June 13 2.04 0.45 30 0.45 30 0.00 0 0 5 5 0.0 0 0
July 13 1.60 2.02 31 2.02 31 0.00 0 0 14 2 0.0 0 0
Aug 13 2.02 1.66 31 1.66 31 0.00 0 0 14 4 0.0 0 0
Sept 13 1.17 7.51 30 7.51 30 0.00 0 0 11 1 0.0 0 0
Water Year Totals: 16.80" 21.36" 365 days 21.36" 365 0.00" 0 days 0 96 days 30 days 97.4" 31 days 56 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
10/1/2012 0.02
10/2/2012 T
10/3/2012 0.00
10/4/2012 0.00
10/5/2012 0.06
10/6/2012 0.05
10/7/2012 0.04
10/8/2012 0.00
10/9/2012 0.00
10/10/2012 0.00
10/11/2012 0.00
10/12/2012 0.00
10/13/2012 0.03
10/14/2012 0.12
10/15/2012 0.00
10/16/2012 0.00
10/17/2012 0.01
10/18/2012 0.00
10/19/2012 0.00
10/20/2012 0.00
10/21/2012 0.00
10/22/2012 0.00
10/23/2012 0.00
10/24/2012 0.00
10/25/2012 0.66
10/26/2012 0.09
10/27/2012 0.00
10/28/2012 0.00
10/29/2012 0.00
10/30/2012 0.00
10/31/2012 0.00
11/1/2012 0.00
11/2/2012 0.00
11/3/2012 0.00
11/4/2012 0.00
11/5/2012 0.00
11/6/2012 0.00
11/7/2012 0.00
11/8/2012 0.00
11/9/2012 0.00
11/10/2012 0.00
11/11/2012 0.21
11/12/2012 0.00
11/13/2012 0.00
11/14/2012 0.00
11/15/2012 0.00
11/16/2012 0.00
11/17/2012 0.00
11/18/2012 0.00
11/19/2012 0.00
11/20/2012 0.00
11/21/2012 0.00
11/22/2012 0.00
11/23/2012 0.00
11/24/2012 0.00
11/25/2012 0.00
11/26/2012 0.00
11/27/2012 T
11/28/2012 0.00
11/29/2012 0.00
11/30/2012 0.00
12/1/2012 0.00
12/2/2012 0.00
12/3/2012 0.00
12/4/2012 0.00
12/5/2012 0.00
12/6/2012 0.00
12/7/2012 T
12/8/2012 0.00
12/9/2012 T
12/10/2012 0.00
12/11/2012 0.03
12/12/2012 0.00
12/13/2012 0.00
12/14/2012 0.00
12/15/2012 0.00
12/16/2012 0.00
12/17/2012 0.00
12/18/2012 0.00
12/19/2012 0.02
12/20/2012 0.10
12/21/2012 0.00
12/22/2012 0.00
12/23/2012 0.00
12/24/2012 0.00
12/25/2012 0.10
12/26/2012 0.00
12/27/2012 0.00
12/28/2012 T
12/29/2012 0.00
12/30/2012 0.00
12/31/2012 T
Day of YearDaily PrcpMultiday Prcp
1/1/2013 T
1/2/2013 0.00
1/3/2013 0.00
1/4/2013 0.00
1/5/2013 0.00
1/6/2013 0.00
1/7/2013 0.00
1/8/2013 0.00
1/9/2013 0.00
1/10/2013 0.00
1/11/2013 0.00
1/12/2013 0.00
1/13/2013 T
1/14/2013 T
1/15/2013 0.00
1/16/2013 0.00
1/17/2013 0.00
1/18/2013 0.00
1/19/2013 0.00
1/20/2013 0.00
1/21/2013 0.00
1/22/2013 0.00
1/23/2013 0.00
1/24/2013 0.00
1/25/2013 0.00
1/26/2013 0.00
1/27/2013 0.01
1/28/2013 0.00
1/29/2013 0.37
1/30/2013 0.00
1/31/2013 0.00
2/1/2013 0.00
2/2/2013 0.00
2/3/2013 0.00
2/4/2013 0.00
2/5/2013 0.00
2/6/2013 0.00
2/7/2013 0.02
2/8/2013 0.00
2/9/2013 0.00
2/10/2013 0.04
2/11/2013 0.02
2/12/2013 T
2/13/2013 0.00
2/14/2013 0.00
2/15/2013 0.08
2/16/2013 0.00
2/17/2013 0.00
2/18/2013 0.00
2/19/2013 0.00
2/20/2013 0.00
2/21/2013 0.39
2/22/2013 0.03
2/23/2013 0.00
2/24/2013 0.21
2/25/2013 0.26
2/26/2013 T
2/27/2013 0.07
2/28/2013 0.00
3/1/2013 0.00
3/2/2013 0.00
3/3/2013 0.00
3/4/2013 0.00
3/5/2013 0.04
3/6/2013 0.00
3/7/2013 0.00
3/8/2013 0.00
3/9/2013 0.00
3/10/2013 0.62
3/11/2013 0.00
3/12/2013 0.28
3/13/2013 0.02
3/14/2013 0.00
3/15/2013 0.00
3/16/2013 0.00
3/17/2013 0.00
3/18/2013 T
3/19/2013 0.00
3/20/2013 0.00
3/21/2013 0.00
3/22/2013 0.00
3/23/2013 0.56
3/24/2013 0.13
3/25/2013 T
3/26/2013 0.00
3/27/2013 0.00
3/28/2013 0.00
3/29/2013 0.00
3/30/2013 0.00
3/31/2013 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2013 0.00
4/2/2013 T
4/3/2013 0.19
4/4/2013 0.00
4/5/2013 0.00
4/6/2013 0.00
4/7/2013 0.00
4/8/2013 0.00
4/9/2013 0.29
4/10/2013 0.21
4/11/2013 0.00
4/12/2013 T
4/13/2013 0.00
4/14/2013 0.09
4/15/2013 0.07
4/16/2013 0.94
4/17/2013 T
4/18/2013 0.34
4/19/2013 0.00
4/20/2013 0.00
4/21/2013 0.00
4/22/2013 0.00
4/23/2013 0.60
4/24/2013 0.04
4/25/2013 0.00
4/26/2013 0.00
4/27/2013 0.00
4/28/2013 0.00
4/29/2013 0.00
4/30/2013 0.00
5/1/2013 0.25
5/2/2013 0.51
5/3/2013 0.00
5/4/2013 0.00
5/5/2013 0.00
5/6/2013 0.00
5/7/2013 0.00
5/8/2013 0.06
5/9/2013 0.47
5/10/2013 0.32
5/11/2013 0.03
5/12/2013 0.01
5/13/2013 0.00
5/14/2013 0.00
5/15/2013 T
5/16/2013 0.06
5/17/2013 0.00
5/18/2013 0.00
5/19/2013 0.00
5/20/2013 0.03
5/21/2013 0.21
5/22/2013 0.00
5/23/2013 0.01
5/24/2013 0.00
5/25/2013 0.00
5/26/2013 0.00
5/27/2013 0.00
5/28/2013 0.00
5/29/2013 T
5/30/2013 0.30
5/31/2013 0.00
6/1/2013 0.00
6/2/2013 0.00
6/3/2013 0.00
6/4/2013 0.00
6/5/2013 0.07
6/6/2013 0.02
6/7/2013 0.00
6/8/2013 0.00
6/9/2013 0.00
6/10/2013 0.00
6/11/2013 0.00
6/12/2013 0.00
6/13/2013 0.00
6/14/2013 T
6/15/2013 T
6/16/2013 T
6/17/2013 T
6/18/2013 0.00
6/19/2013 0.04
6/20/2013 0.00
6/21/2013 0.00
6/22/2013 0.00
6/23/2013 0.00
6/24/2013 0.14
6/25/2013 0.00
6/26/2013 0.00
6/27/2013 0.00
6/28/2013 0.00
6/29/2013 0.18
6/30/2013 T
Day of YearDaily PrcpMultiday Prcp
7/1/2013 0.03
7/2/2013 0.07
7/3/2013 0.00
7/4/2013 0.02
7/5/2013 T
7/6/2013 0.01
7/7/2013 0.34
7/8/2013 0.00
7/9/2013 0.00
7/10/2013 0.00
7/11/2013 0.00
7/12/2013 0.23
7/13/2013 0.08
7/14/2013 0.57
7/15/2013 0.15
7/16/2013 0.03
7/17/2013 0.00
7/18/2013 0.00
7/19/2013 0.00
7/20/2013 0.00
7/21/2013 0.00
7/22/2013 0.00
7/23/2013 0.00
7/24/2013 0.00
7/25/2013 0.02
7/26/2013 0.00
7/27/2013 T
7/28/2013 0.21
7/29/2013 0.17
7/30/2013 0.09
7/31/2013 0.00
8/1/2013 0.00
8/2/2013 0.00
8/3/2013 0.00
8/4/2013 0.12
8/5/2013 0.01
8/6/2013 T
8/7/2013 0.15
8/8/2013 0.00
8/9/2013 0.00
8/10/2013 0.01
8/11/2013 0.12
8/12/2013 0.02
8/13/2013 0.75
8/14/2013 0.04
8/15/2013 0.01
8/16/2013 0.00
8/17/2013 0.00
8/18/2013 0.00
8/19/2013 T
8/20/2013 0.00
8/21/2013 0.00
8/22/2013 0.32
8/23/2013 0.06
8/24/2013 0.01
8/25/2013 T
8/26/2013 0.02
8/27/2013 T
8/28/2013 0.00
8/29/2013 0.00
8/30/2013 0.00
8/31/2013 0.02
9/1/2013 0.02
9/2/2013 0.00
9/3/2013 0.00
9/4/2013 0.00
9/5/2013 0.00
9/6/2013 0.00
9/7/2013 0.00
9/8/2013 0.00
9/9/2013 T
9/10/2013 0.88
9/11/2013 0.93
9/12/2013 1.70
9/13/2013 2.44
9/14/2013 0.27
9/15/2013 0.18
9/16/2013 0.35
9/17/2013 0.01
9/18/2013 0.00
9/19/2013 0.00
9/20/2013 0.00
9/21/2013 0.00
9/22/2013 0.00
9/23/2013 0.44
9/24/2013 0.00
9/25/2013 0.00
9/26/2013 0.00
9/27/2013 0.00
9/28/2013 0.29
9/29/2013 0.00
9/30/2013 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2012 7:00 AM 0.02 M M M M Light drizzle over night.
10/2/2012 7:00 AM T M M M M Trace of precipitation during morning rush hour.
10/3/2012 7:00 AM 0.00 0.0 M M M
10/4/2012 7:00 AM 0.00 0.0 M M M
10/5/2012 7:00 AM 0.06 M M M M Rain mixed with a little snow.
10/6/2012 7:00 AM 0.05 M M M M Mostly snow changing to rain.
10/7/2012 7:00 AM 0.04 M M M M Cold light drizzle
10/8/2012 7:00 AM 0.00 0.0 M M M
10/9/2012 7:00 AM 0.00 0.0 M M M
10/10/2012 7:00 AM 0.00 0.0 M M M
10/11/2012 7:00 AM 0.00 0.0 M M M
10/12/2012 7:00 AM 0.00 0.0 M M M
10/13/2012 7:00 AM 0.03 M M M M Drissling rain during the night.
10/14/2012 7:00 AM 0.12 M M M M Very light rain during two periods of the observation day. The first rain came during the early morning hours, the second period occurred in the afternoon and the final period of rain came during the 10 PM hour.
10/15/2012 7:00 AM 0.00 0.0 M M M
10/16/2012 7:00 AM 0.00 0.0 M M M
10/17/2012 7:00 AM 0.01 M M M M Drizzle over night.
10/18/2012 7:00 AM 0.00 0.0 M M M
10/19/2012 7:00 AM 0.00 0.0 M M M
10/20/2012 7:00 AM 0.00 0.0 M M M
10/21/2012 7:00 AM 0.00 0.0 M M M
10/22/2012 7:00 AM 0.00 0.0 M M M
10/23/2012 7:00 AM 0.00 0.0 M M M
10/24/2012 7:00 AM 0.00 0.0 M M M
10/25/2012 7:00 AM 0.66 3.4 M 3.4 M Snowing at time of observation. Precipation fell as rain until 9 PM when it changed over to snow.
10/26/2012 7:00 AM 0.09 1.0 M 3.0 M
10/27/2012 7:00 AM 0.00 0.0 M M M
10/28/2012 7:00 AM 0.00 0.0 M M M
10/29/2012 7:00 AM 0.00 0.0 M M M
10/30/2012 7:00 AM 0.00 0.0 M M M
10/31/2012 7:00 AM 0.00 0.0 M M M
11/1/2012 7:00 AM 0.00 0.0 M M M
11/2/2012 7:00 AM 0.00 0.0 M M M
11/3/2012 7:00 AM 0.00 0.0 M M M
11/4/2012 7:00 AM 0.00 0.0 M M M
11/5/2012 7:00 AM 0.00 0.0 M M M
11/6/2012 7:00 AM 0.00 0.0 M M M
11/7/2012 7:00 AM 0.00 0.0 M M M
11/8/2012 7:00 AM 0.00 0.0 M M M
11/9/2012 7:00 AM 0.00 0.0 M M M
11/10/2012 7:00 AM 0.00 0.0 M M M
11/11/2012 7:00 AM 0.21 0.3 0.04 0.3 0.04 Rain changing over to light snow over night. Melted value from core is an estimate.
11/12/2012 7:00 AM 0.00 0.0 M M M
11/13/2012 7:00 AM 0.00 0.0 M M M
11/14/2012 7:00 AM 0.00 0.0 M M M
11/15/2012 7:00 AM 0.00 0.0 M M M
11/16/2012 7:00 AM 0.00 0.0 M M M
11/17/2012 7:00 AM 0.00 0.0 M M M
11/18/2012 7:00 AM 0.00 0.0 M M M
11/19/2012 7:00 AM 0.00 0.0 M M M
11/20/2012 7:00 AM 0.00 0.0 M M M
11/21/2012 7:00 AM 0.00 0.0 M M M
11/22/2012 7:00 AM 0.00 0.0 M M M
11/23/2012 7:00 AM 0.00 0.0 M M M
11/24/2012 7:00 AM 0.00 0.0 M M M
11/25/2012 7:00 AM 0.00 0.0 M M M
11/26/2012 7:00 AM 0.00 0.0 M M M
11/27/2012 7:00 AM T M M M M Fine mist during the mornings hours froze to surfaces as it fell.
11/28/2012 7:00 AM 0.00 0.0 M M M
11/29/2012 7:00 AM 0.00 0.0 M M M
11/30/2012 7:00 AM 0.00 0.0 M M M
12/1/2012 7:00 AM 0.00 0.0 M M M
12/2/2012 7:00 AM 0.00 0.0 M M M
12/3/2012 7:00 AM 0.00 0.0 M M M
12/4/2012 7:00 AM 0.00 0.0 M M M
12/5/2012 7:00 AM 0.00 0.0 M M M
12/6/2012 7:00 AM 0.00 0.0 M M M
12/7/2012 7:00 AM T M M M M Very light drizzle during the morning.
12/8/2012 7:00 AM 0.00 0.0 M M M
12/9/2012 7:00 AM T T T T T Dusting of snow towards late evening. It becomes very cold (20-25 degrees F). The time when the snow ended is unknown.
12/10/2012 7:00 AM 0.00 0.0 M M M
12/11/2012 7:00 AM 0.03 0.4 0.03 0.5 0.03
12/12/2012 7:00 AM 0.00 0.0 M M M
12/13/2012 7:00 AM 0.00 0.0 M M M
12/14/2012 7:00 AM 0.00 0.0 M M M
12/15/2012 7:00 AM 0.00 0.0 M M M
12/16/2012 7:00 AM 0.00 0.0 M M M
12/17/2012 7:00 AM 0.00 0.0 M M M
12/18/2012 7:00 AM 0.00 0.0 M M M
12/19/2012 7:00 AM 0.02 0.9 0.02 1.0 0.02 Moderate snow at time of observation. Snow flakes during the ten o'clock hour. Snow stopped soon after it started then did not begin again until the 4 AM hour. It continued to snow past observation period.
12/20/2012 7:00 AM 0.10 3.3 0.10 4.0 0.12 Snow began before obervation period began and ended at the time indicated.
12/21/2012 7:00 AM 0.00 0.0 M M M
12/22/2012 7:00 AM 0.00 0.0 M M M
12/23/2012 7:00 AM 0.00 0.0 M M M
12/24/2012 7:00 AM 0.00 0.0 M M M
12/25/2012 7:00 AM 0.10 3.7 0.10 4.0 0.10 Light snow during the evening.
12/26/2012 7:00 AM 0.00 0.0 0.00 3.5 M
12/27/2012 7:00 AM 0.00 0.0 0.00 2.0 M
12/28/2012 7:00 AM T T T 1.0 M Dusting of snow over night
12/29/2012 7:00 AM 0.00 0.0 0.00 0.5 M
12/30/2012 7:00 AM 0.00 0.0 0.00 0.5 M
12/31/2012 7:00 AM T T T 0.5 M Light snow over night.
1/1/2013 7:00 AM T T T 0.5 M
1/2/2013 7:00 AM 0.00 0.0 0.00 0.5 M
1/3/2013 7:00 AM 0.00 0.0 0.00 0.5 M Last remainng snow from holiday storms lingers to provide one halff inc snow cover. With warmer weather predicted for tommorow, snow cover should be gone.
1/4/2013 7:00 AM 0.00 0.0 M M M
1/5/2013 7:00 AM 0.00 0.0 M M M
1/6/2013 7:00 AM 0.00 0.0 M M M
1/7/2013 7:00 AM 0.00 0.0 M M M
1/8/2013 7:00 AM 0.00 0.0 M M M
1/9/2013 7:00 AM 0.00 0.0 M M M
1/10/2013 7:00 AM 0.00 0.0 M M M
1/11/2013 7:00 AM 0.00 0.0 M M M
1/12/2013 7:00 AM 0.00 0.0 M M M
1/13/2013 7:00 AM T T T T T Very light snow flurries during the day. No accumulation.
1/14/2013 7:00 AM T T T T T Brief light snow flurries
1/15/2013 7:00 AM 0.00 0.0 M M M
1/16/2013 7:00 AM 0.00 0.0 M M M
1/17/2013 7:00 AM 0.00 0.0 M M M
1/18/2013 7:00 AM 0.00 0.0 M M M
1/19/2013 7:00 AM 0.00 0.0 M M M
1/20/2013 7:00 AM 0.00 0.0 M M M
1/21/2013 7:00 AM 0.00 0.0 M M M
1/22/2013 7:00 AM 0.00 0.0 M M M
1/23/2013 7:00 AM 0.00 0.0 M M M
1/24/2013 7:00 AM 0.00 0.0 M M M
1/25/2013 7:00 AM 0.00 0.0 M M M
1/26/2013 7:00 AM 0.00 0.0 M M M
1/27/2013 7:00 AM 0.01 0.0 0.00 0.0 0.00 Drizzle occurring briefly after dark. No snow mixed in with the drizzle.
1/28/2013 7:00 AM 0.00 0.0 M M M
1/29/2013 7:00 AM 0.37 5.1 0.23 5.0 0.23 Wind direction change at 1 PM. Snow arrived 3 hours later and snowed through out the night. Received more snow than originally predicted.
1/30/2013 7:00 AM 0.00 0.0 0.00 4.0 M
1/31/2013 7:00 AM 0.00 0.0 0.00 3.5 M
2/1/2013 7:00 AM 0.00 0.0 0.00 3.0 M
2/2/2013 7:00 AM 0.00 0.0 0.00 2.0 M
2/3/2013 7:00 AM 0.00 0.0 0.00 1.0 M
2/4/2013 7:00 AM 0.00 0.0 M M M
2/5/2013 7:00 AM 0.00 0.0 M M M
2/6/2013 7:00 AM 0.00 0.0 M M M
2/7/2013 7:00 AM 0.02 0.0 0.00 0.0 0.00 Precipitation fell as rain with a small amount of snow mixed in with the very light rain.
2/8/2013 7:00 AM 0.00 0.0 M M M
2/9/2013 7:00 AM 0.00 0.0 M M M
2/10/2013 7:00 AM 0.04 0.6 0.04 0.5 0.04
2/11/2013 7:00 AM 0.02 0.1 0.02 0.0 0.02
2/12/2013 7:00 AM T 0.0 0.00 0.0 0.00
2/13/2013 7:00 AM 0.00 0.0 M M M
2/14/2013 7:00 AM 0.00 0.0 M M M
2/15/2013 7:00 AM 0.08 2.0 0.08 2.0 0.08 Moderate snow for the first two hours of the precipitation event and then it tapered off to light snow.
2/16/2013 7:00 AM 0.00 0.0 0.00 0.5 M
2/17/2013 7:00 AM 0.00 0.0 M M M
2/18/2013 7:00 AM 0.00 0.0 M M M
2/19/2013 7:00 AM 0.00 0.0 M M M
2/20/2013 7:00 AM 0.00 0.0 M M M
2/21/2013 7:00 AM 0.39 4.8 0.36 5.0 0.36 Snowing during time of observation.
2/22/2013 7:00 AM 0.03 0.3 0.03 3.5 0.34 Snowing at beginning of observation period.
2/23/2013 7:00 AM 0.00 0.0 0.00 3.0 0.34
2/24/2013 7:00 AM 0.21 3.7 0.21 6.0 0.60
2/25/2013 7:00 AM 0.26 6.0 0.26 10.0 1.36 Total of 9.7 inches of snow since the beginning of the storm at 4:10 AM on 2/24/2013.
2/26/2013 7:00 AM T T T 10.0 M Brief snow flurries just before te end of the observation period.
2/27/2013 7:00 AM 0.07 0.7 0.07 10.0 M The snowfall became intermittent after 11 AM.
2/28/2013 7:00 AM 0.00 0.0 0.00 8.0 M
3/1/2013 7:00 AM 0.00 0.0 0.00 6.0 M
3/2/2013 7:00 AM 0.00 0.0 0.00 3.0 M
3/3/2013 7:00 AM 0.00 0.0 0.00 1.0 M
3/4/2013 7:00 AM 0.00 0.0 0.00 T M Warm temperatures during the past 24 hours melted much of the remaining snow on the ground.
3/5/2013 7:00 AM 0.04 0.4 0.04 0.5 0.04
3/6/2013 7:00 AM 0.00 0.0 M M M
3/7/2013 7:00 AM 0.00 0.0 M M M
3/8/2013 7:00 AM 0.00 0.0 M M M
3/9/2013 7:00 AM 0.00 0.0 M M M
3/10/2013 7:00 AM 0.62 6.8 0.62 7.0 0.57 Heavy wet snow. Windy conditions made snow depth determinations difficult.
3/11/2013 7:00 AM 0.00 0.0 0.00 6.0 0.57
3/12/2013 7:00 AM 0.28 3.6 0.28 5.0 M It was still snowing at the time of observation.
3/13/2013 7:00 AM 0.02 0.3 T 3.0 M Light snowfall at beginning of observation period. Snowfall came at the end of a snow event that began at 6:30 PM on 3/11.
3/14/2013 7:00 AM 0.00 0.0 0.00 T M
3/15/2013 7:00 AM 0.00 0.0 M M M
3/16/2013 7:00 AM 0.00 0.0 M M M
3/17/2013 7:00 AM 0.00 0.0 M M M
3/18/2013 7:00 AM T T T T T A brief spill over of snow from snow showers occurring in the foothills.
3/19/2013 7:00 AM 0.00 0.0 M M M
3/20/2013 7:00 AM 0.00 0.0 M M M
3/21/2013 7:00 AM 0.00 0.0 M M M
3/22/2013 7:00 AM 0.00 0.0 M M M
3/23/2013 7:00 AM 0.56 6.3 0.56 6.5 0.56 Typical wet spring snow begins Friday late afternoon. Still snowing at time of observation.
3/24/2013 7:00 AM 0.13 1.3 0.13 7.0 M Snows continously for 24 hours. Total snowfall from storm 7.6 inches
3/25/2013 7:00 AM T T T 5.0 M A brief amount of flurries followed by cold temperatures.
3/26/2013 7:00 AM 0.00 0.0 0.00 4.0 M
3/27/2013 7:00 AM 0.00 0.0 0.00 3.0 M
3/28/2013 7:00 AM 0.00 0.0 M T M
3/29/2013 7:00 AM 0.00 0.0 M M M
3/30/2013 7:00 AM 0.00 0.0 M M M
3/31/2013 7:00 AM 0.00 0.0 M M M
4/1/2013 7:00 AM 0.00 0.0 M M M
4/2/2013 7:00 AM T M M M M Drizzle occurred briefly after dark.
4/3/2013 7:00 AM 0.19 M M M M Cold light rain during afternoon and evening.
4/4/2013 7:00 AM 0.00 0.0 M M M
4/5/2013 7:00 AM 0.00 0.0 M M M
4/6/2013 7:00 AM 0.00 0.0 M M M
4/7/2013 7:00 AM 0.00 0.0 M M M
4/8/2013 7:00 AM 0.00 0.0 M M M
4/9/2013 7:00 AM 0.29 5.7 0.29 6.0 0.29 Light rain from 7:30 PM until 9:30 PM when the precipitation changed to snow and it continued to snow past the end of the observation period.
4/10/2013 7:00 AM 0.21 4.3 0.21 5.0 M Continuation of snowstorm from previous day. Temperatures in the twenties. Very cold for April. New record low set for the day at DIA.
4/11/2013 7:00 AM 0.00 0.0 0.00 T M
4/12/2013 7:00 AM T 0.0 M M M A light rainshower occur at nightfall and lasted about 12 minutes.
4/13/2013 7:00 AM 0.00 0.0 M M M
4/14/2013 7:00 AM 0.09 0.0 M M M
4/15/2013 7:00 AM 0.07 0.3 0.07 0.5 0.07 Snow begins before sunrise and continues throughout the day after observation period ends.
4/16/2013 7:00 AM 0.94 15.4 0.94 11.0 0.87 Snow began just before beginning of observation period (see 4/15/13 report). Continous snowfall heavy at times until 2:15 AM. Total of 15.7 inches for storm event. The most snow from one storm in Arvada since the March 2003.
4/17/2013 7:00 AM T T T 6.0 M Corn snow around the 7 PM hour. Snow stops shortly and then starts up again just before 7 AM. Early morning snow is small pellets. Still snowing at end of observation period.
4/18/2013 7:00 AM 0.34 5.2 0.34 8.0 M Snowing at the beginnning of observation time. Steady light to moderate snowfall through out the day.
4/19/2013 7:00 AM 0.00 0.0 M M M
4/20/2013 7:00 AM 0.00 0.0 M M M
4/21/2013 7:00 AM 0.00 0.0 M M M
4/22/2013 7:00 AM 0.00 0.0 M M M
4/23/2013 7:00 AM 0.60 5.4 0.57 5.5 0.57
4/24/2013 7:00 AM 0.04 0.4 0.04 3.0 M Light to moderate snow continued to fall from a storm that started the day before at 11:15 AM.
4/25/2013 7:00 AM 0.00 0.0 M M M
4/26/2013 7:00 AM 0.00 0.0 M M M
4/27/2013 7:00 AM 0.00 0.0 M M M
4/28/2013 7:00 AM 0.00 0.0 M M M
4/29/2013 7:00 AM 0.00 0.0 M M M
4/30/2013 7:00 AM 0.00 0.0 M M M
5/1/2013 7:00 AM 0.25 1.7 0.14 2.0 0.14 Precipitation began as rain and switched over to snow at 5:30 AM. It was snowing at the end of the observation period.
5/2/2013 7:00 AM 0.51 4.0 0.43 4.5 0.43 Snowing at beginning of observation period and continues until nightfall.
5/3/2013 7:00 AM 0.00 0.0 M T M
5/4/2013 7:00 AM 0.00 0.0 M M M
5/5/2013 7:00 AM 0.00 0.0 M M M
5/6/2013 7:00 AM 0.00 0.0 M M M
5/7/2013 7:00 AM 0.00 0.0 M M M
5/8/2013 7:00 AM 0.06 M M M M Light rain with lightning observed.
5/9/2013 7:00 AM 0.47 M M M M Light to moderate rain during precipitation event. Lightning observed at beginning of event. Rain was intermittent throughout event.
5/10/2013 7:00 AM 0.32 M M M M light rain from 7 AM until 10 AM followed by a mild thunder shower in the afernoon.
5/11/2013 7:00 AM 0.03 M M M M Brief light rain from thundershowers passing to the south of observation location
5/12/2013 7:00 AM 0.01 M M M M Brief rain from a passing storm cloud.
5/13/2013 7:00 AM 0.00 0.0 M M M
5/14/2013 7:00 AM 0.00 0.0 M M M
5/15/2013 7:00 AM T M M M M Brief shower comprised of a few large size droplets.
5/16/2013 7:00 AM 0.06 M M M M Thundershowers moving in an unusual westerly direction provides a little light rain
5/17/2013 7:00 AM 0.00 0.0 M M M
5/18/2013 7:00 AM 0.00 0.0 M M M
5/19/2013 7:00 AM 0.00 0.0 M M M
5/20/2013 7:00 AM 0.03 M M M M Very light rain starts just before the end of the observation period and continued past the end of the period.
5/21/2013 7:00 AM 0.21 M M M M Intermittent light rain showers throughout the precipitation event. No thunder or hail observed.
5/22/2013 7:00 AM 0.00 0.0 M M M
5/23/2013 7:00 AM 0.01 M M M M Mild thundershower skits area. No hail. Heavier rain to the north of the area.
5/24/2013 7:00 AM 0.00 0.0 M M M
5/25/2013 7:00 AM 0.00 0.0 M M M
5/26/2013 7:00 AM 0.00 0.0 M M M
5/27/2013 7:00 AM 0.00 0.0 M M M
5/28/2013 7:00 AM 0.00 0.0 M M M
5/29/2013 7:00 AM T M M M M Rain Showers began light in intensity and the intensity was increasing as observation period ended.
5/30/2013 7:00 AM 0.30 M M M M Upslope rain started at approximately 6:25 AM during the previous observation period and continue into today's observation period. Moderate rain for most of the event.
5/31/2013 7:00 AM 0.00 0.0 M M M
6/1/2013 7:00 AM 0.00 0.0 M M M
6/2/2013 7:00 AM 0.00 0.0 M M M
6/3/2013 7:00 AM 0.00 0.0 M M M
6/4/2013 7:00 AM 0.00 0.0 M M M
6/5/2013 7:00 AM 0.07 M M M M Misting at the end of the observation period. The reported rainfall is the result of mild thundershowers rumbling through the area during the late evening hours. Ranfall from these thundershowers was intermittent. One thundershower would roll through then several hours would pass and another thundershower would start up.
6/6/2013 7:00 AM 0.02 M M M M Misty during the first 5 hours of the observation period. Misting ends but skies remain cloudy until 6 PM.
6/7/2013 7:00 AM 0.00 0.0 M M M
6/8/2013 7:00 AM 0.00 0.0 M M M
6/9/2013 7:00 AM 0.00 0.0 M M M
6/10/2013 7:00 AM 0.00 0.0 M M M
6/11/2013 7:00 AM 0.00 0.0 M M M
6/12/2013 7:00 AM 0.00 0.0 M M M
6/13/2013 7:00 AM 0.00 0.0 M M M
6/14/2013 7:00 AM T M M M M A few drops off rain in the afternoon.
6/15/2013 7:00 AM T M M M M A few drops of rain from afternoon showers.
6/16/2013 7:00 AM T M M M M A few drops of rain in the afternoon.
6/17/2013 7:00 AM T M M M M A few drops or rain in the afternoon.
6/18/2013 7:00 AM 0.00 0.0 M M M
6/19/2013 7:00 AM 0.04 M M M M A thunder shower briefly drop a moderate amount of rain and quickly ended. A brief shower past through at 7:30 PM it rained for about 5 minutes.
6/20/2013 7:00 AM 0.00 0.0 M M M
6/21/2013 7:00 AM 0.00 0.0 M M M
6/22/2013 7:00 AM 0.00 0.0 M M M
6/23/2013 7:00 AM 0.00 0.0 M M M
6/24/2013 7:00 AM 0.14 M M M M Twp waves of thundershowers came through obervation area last night. The first began at 05:05PM and ended at at 06:25 PM and dropped 0.05 inches of rain. A second wave began at 09:35 PM and ended at 10:10 PM. It dropped 0.09 inches or rain. No hail was observed during either preceipitaion event. The times of the two events are combined under the duration information that appears below.
6/25/2013 7:00 AM 0.00 0.0 M M M
6/26/2013 7:00 AM 0.00 0.0 M M M
6/27/2013 7:00 AM 0.00 0.0 M M M
6/28/2013 7:00 AM 0.00 0.0 M M M
6/29/2013 7:00 AM 0.18 M M M M Moderate thundershower late in the evening. More powerful portion of the shower occurred just to the east of the observation area. 0.06 of the precipitation amount reported occurred from 6PM until 6:15 PM.
6/30/2013 7:00 AM T M M M M A few drops of rain from a passing thundershower.
7/1/2013 7:00 AM 0.03 M M M M Thundershower passing from north to south along front range dropped a little rain.
7/2/2013 7:00 AM 0.07 M M M M Thundershowers during the afternoon. Heavier showers to the east of obs station.
7/3/2013 7:00 AM 0.00 0.0 M M M
7/4/2013 7:00 AM 0.02 M M M M High base thundershower produces a few drops of rain.
7/5/2013 7:00 AM T M M M M High base thundershower produces a few drops of rain.
7/6/2013 7:00 AM 0.01 M M M M A very drops of rain from a passing shower that was enough to briefly wet the sidewalk.
7/7/2013 7:00 AM 0.34 M M M M A rare occurrence in recent years occurred on Saturday afternoon. A heavy thunderstorm pasted over head producing moderate amounts of rain. I loved every minute of it! First hour of precipitation was marked by intermittent light rain before picking up in intensity.
7/8/2013 7:00 AM 0.00 0.0 M M M
7/9/2013 7:00 AM 0.00 0.0 M M M
7/10/2013 7:00 AM 0.00 0.0 M M M
7/11/2013 7:00 AM 0.00 0.0 M M M
7/12/2013 7:00 AM 0.23 M M M M A lot of lightning but no hail associated with a moderate thundershower. The Colorado monsoon has arrived!
7/13/2013 7:00 AM 0.08 M M M M Mild intermittent thundershowers from from mid afternoon to early evening.
7/14/2013 7:00 AM 0.57 M M M M Heavy rain from thundershowers during late afternoon. No hail observed. Rain became intermittent after 6:30 PM. Much heavy rainfall reports just to the east of observation station.
7/15/2013 7:00 AM 0.15 M M M M Upslope rains begin during the night and it continues to rain intermittently after observation period ends.
7/16/2013 7:00 AM 0.03 M M M M Upslope precipitation event. Brief shower in afternoon. Most of the precipitation from the event fell before 7 AM and was documented in yesterday's report.
7/17/2013 7:00 AM 0.00 0.0 M M M
7/18/2013 7:00 AM 0.00 0.0 M M M
7/19/2013 7:00 AM 0.00 0.0 M M M
7/20/2013 7:00 AM 0.00 0.0 M M M
7/21/2013 7:00 AM 0.00 0.0 M M M
7/22/2013 7:00 AM 0.00 0.0 M M M
7/23/2013 7:00 AM 0.00 0.0 M M M
7/24/2013 7:00 AM 0.00 0.0 M M M
7/25/2013 7:00 AM 0.02 M M M M Very light rain just befor the end of the observatio period. Intermittent rain at the end of the observation period.
7/26/2013 7:00 AM 0.00 0.0 M M M
7/27/2013 7:00 AM T M M M M During the afternoon,there were a few drops of rain.
7/28/2013 7:00 AM 0.21 M M M M Cloudy most of the day then upslope conditions result in continuous light to moderate rain. Rain stopped briefly at end of observation period before restarting again.
7/29/2013 7:00 AM 0.17 M M M M Upslope rain continued through the start of this observation period. It ended during the afternoon.
7/30/2013 7:00 AM 0.09 M M M M Mist and fog until about 3:30 PM and it resulted in a very light rain during part of the day.
7/31/2013 7:00 AM 0.00 0.0 M M M
8/1/2013 7:00 AM 0.00 0.0 M M M
8/2/2013 7:00 AM 0.00 0.0 M M M
8/3/2013 7:00 AM 0.00 0.0 M M M
8/4/2013 7:00 AM 0.12 M M M M Observation location was just on the western edge of the heavy precipitation.
8/5/2013 7:00 AM 0.01 M M M M
8/6/2013 7:00 AM T M M M M A few drops of rain in afternoon
8/7/2013 7:00 AM 0.15 M M M M Passing thundershowers in afternoon. A times the rain was heavy. time of occurrence not recorded.
8/8/2013 7:00 AM 0.00 0.0 M M M
8/9/2013 7:00 AM 0.00 0.0 M M M
8/10/2013 7:00 AM 0.01 M M M M Just enough rain to wet the streets. No thunder with rain.
8/11/2013 7:00 AM 0.12 M M M M Thundershower approached observation staion as a high based thundershower but shower came directly over observation area and dropped moderate rainfall for about 20 minutes.
8/12/2013 7:00 AM 0.02 M M M M Typical afternoon thundershower routine. Clouds up by 2 -3 PM and a thundershower rolls through the observation area.
8/13/2013 7:00 AM 0.75 M M M M Total precipitation reported was the result of two thundershowers passing over observation location. The first shower occurred around 4:00 PM and dropped about 0.06 inches of rain in approximity 10 minutes. The main storm dropped another 0.69 inches of rain. It is this second storm that the duration information is reported. This is the largest amount of rainfall to occur in a 24 hour period this summer at this location.
8/14/2013 7:00 AM 0.04 M M M M Brief afternoon shower.
8/15/2013 7:00 AM 0.01 M M M M Brief light rain associated with a thunder shower that passed to the north of the observation location.
8/16/2013 7:00 AM 0.00 0.0 M M M
8/17/2013 7:00 AM 0.00 0.0 M M M
8/18/2013 7:00 AM 0.00 0.0 M M M
8/19/2013 7:00 AM T M M M M A few drops of rain as the sky clouds up in the afternoon.
8/20/2013 7:00 AM 0.00 0.0 M M M
8/21/2013 7:00 AM 0.00 0.0 M M M
8/22/2013 7:00 AM 0.32 M M M M Afternoon thundershowers from late season monsoon flow.
8/23/2013 7:00 AM 0.06 M M M M Late afternoon shower passes through the area.
8/24/2013 7:00 AM 0.01 M M M M
8/25/2013 7:00 AM T M M M M
8/26/2013 7:00 AM 0.02 M M M M
8/27/2013 7:00 AM T M M M M
8/28/2013 7:00 AM 0.00 0.0 M M M
8/29/2013 7:00 AM 0.00 0.0 M M M
8/30/2013 7:00 AM 0.00 0.0 M M M
8/31/2013 7:00 AM 0.02 M M M M
9/1/2013 7:00 AM 0.02 M M M M
9/2/2013 7:00 AM 0.00 0.0 M M M
9/3/2013 7:00 AM 0.00 0.0 M M M
9/4/2013 7:00 AM 0.00 0.0 M M M
9/5/2013 7:00 AM 0.00 0.0 M M M
9/6/2013 7:00 AM 0.00 0.0 M M M
9/7/2013 7:00 AM 0.00 0.0 M M M
9/8/2013 7:00 AM 0.00 0.0 M M M
9/9/2013 7:00 AM T M M M M A few drops of rain but not enough to wet the surface of the local streets.
9/10/2013 7:00 AM 0.88 M M M M Thundershowers in the area drop a large quantity of rain and hail. No hail observed here but just to the south of this location a lot of graupel sized hail was reported. Rain began at 3:50 PM will an initial wave of thundershowers then stopped. It began again in earnest at 07:15 PM and did not quit until near midnight.
9/11/2013 7:00 AM 0.93 M M M M Intermittent upslope rain of varying intensity through out the day. Large amounts of rain recorded due to upslope conditions combined with late summer monsoonal flow of moisture. The monsoon flow is very late for the season and is considered unusual for this time of year. It was raining at the beginning and end of the observation period so no duration information given with this report.
9/12/2013 7:00 AM 1.70 M M M M Rain, Rain, Rain. I get the message. I am building a boat. Moderate rain off and on all day so no times given. As a meteorologist, I have seen nothing like this rain in my 36 years in Denver.
9/13/2013 7:00 AM 2.44 M M M M An incredible amount of rain unprecedented for the Denver area. 1.93 inches were recorded between 7 AM and 7 PM. The remainder fell after 7 PM. No start and stop times given in duration information since the rainfall was almost continuous for the 24 hr period and it is still raining at 7 AM on Sept. 13, 2013.
9/14/2013 7:00 AM 0.27 M M M M Light rain begins again during the late afternoon hours.
9/15/2013 7:00 AM 0.18 M M M M Light rain during the afternoon.
9/16/2013 7:00 AM 0.35 M M M M Raining at the beginning of observation. Light rain most of the day bu intensity varied through out the day.
9/17/2013 7:00 AM 0.01 M M M M Light rain during the night.
9/18/2013 7:00 AM 0.00 0.0 M M M
9/19/2013 7:00 AM 0.00 0.0 M M M
9/20/2013 7:00 AM 0.00 0.0 M M M
9/21/2013 7:00 AM 0.00 0.0 M M M
9/22/2013 7:00 AM 0.00 0.0 M M M
9/23/2013 7:00 AM 0.44 M M M M Steady rain shower during the night. No thunder heard during shower.
9/24/2013 7:00 AM 0.00 0.0 M M M
9/25/2013 7:00 AM 0.00 0.0 M M M
9/26/2013 7:00 AM 0.00 0.0 M M M
9/27/2013 7:00 AM 0.00 0.0 M M M
9/28/2013 7:00 AM 0.29 M M M M Rain started as mist and became light rain by mid-afternoon from upslope conditions through out the day and into the evening. Intensity picked up during the evening then rapidly clearing by 10:30 PM. Frost was possible but temperature dropped only to 38F by sunrise.
9/29/2013 7:00 AM 0.00 0.0 M M M
9/30/2013 7:00 AM 0.00 0.0 M M M



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