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 13 1.13 1.09 31 1.09 31 0.00 0 0 7 2 1.8 3 3
Nov 13 1.00 0.20 30 0.20 30 0.00 0 0 2 2 2.0 1 3
Dec 13 0.66 0.51 31 0.51 31 0.00 0 0 5 1 8.1 4 14
Jan 14 0.47 1.15 31 1.15 31 0.00 0 0 8 2 18.9 8 15
Feb 14 0.54 0.40 28 0.40 28 0.00 0 0 7 4 7.4 7 14
March 14 1.61 1.14 31 1.14 31 0.00 0 0 4 2 5.3 4 4
April 14 2.19 1.07 30 1.07 30 0.00 0 0 8 1 6.5 2 2
May 14 2.37 3.88 31 3.88 31 0.00 0 0 13 4 5.3 3 1
June 14 2.04 0.73 30 0.73 30 0.00 0 0 9 3 0.0 0 0
July 14 1.60 5.61 31 5.61 31 0.00 0 0 9 2 0.0 0 0
Aug 14 2.02 1.05 31 1.05 31 0.00 0 0 16 4 0.0 0 0
Sept 14 1.17 2.21 30 2.21 30 0.00 0 0 12 1 0.0 0 0
Water Year Totals: 16.80" 19.04" 365 days 19.04" 365 0.00" 0 days 0 100 days 28 days 55.3" 32 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
10/1/2013 0.00
10/2/2013 0.00
10/3/2013 0.00
10/4/2013 0.43
10/5/2013 0.06
10/6/2013 0.00
10/7/2013 0.00
10/8/2013 0.00
10/9/2013 0.00
10/10/2013 0.00
10/11/2013 0.07
10/12/2013 0.00
10/13/2013 0.00
10/14/2013 0.00
10/15/2013 0.00
10/16/2013 T
10/17/2013 0.00
10/18/2013 0.25
10/19/2013 0.00
10/20/2013 0.00
10/21/2013 0.12
10/22/2013 0.00
10/23/2013 0.00
10/24/2013 0.00
10/25/2013 0.00
10/26/2013 0.00
10/27/2013 0.00
10/28/2013 0.00
10/29/2013 0.05
10/30/2013 0.11
10/31/2013 T
11/1/2013 0.00
11/2/2013 0.00
11/3/2013 0.00
11/4/2013 0.00
11/5/2013 0.00
11/6/2013 0.00
11/7/2013 0.00
11/8/2013 0.00
11/9/2013 0.00
11/10/2013 0.00
11/11/2013 0.00
11/12/2013 0.00
11/13/2013 0.00
11/14/2013 0.00
11/15/2013 0.00
11/16/2013 0.00
11/17/2013 T
11/18/2013 0.00
11/19/2013 0.00
11/20/2013 0.00
11/21/2013 0.18
11/22/2013 0.02
11/23/2013 T
11/24/2013 0.00
11/25/2013 0.00
11/26/2013 0.00
11/27/2013 0.00
11/28/2013 0.00
11/29/2013 0.00
11/30/2013 0.00
12/1/2013 0.00
12/2/2013 0.00
12/3/2013 0.00
12/4/2013 0.18
12/5/2013 0.12
12/6/2013 0.00
12/7/2013 0.00
12/8/2013 0.00
12/9/2013 0.00
12/10/2013 0.00
12/11/2013 0.00
12/12/2013 0.00
12/13/2013 0.00
12/14/2013 0.00
12/15/2013 0.00
12/16/2013 0.00
12/17/2013 0.00
12/18/2013 0.00
12/19/2013 0.00
12/20/2013 T
12/21/2013 0.00
12/22/2013 0.02
12/23/2013 0.04
12/24/2013 0.00
12/25/2013 0.00
12/26/2013 0.00
12/27/2013 0.00
12/28/2013 0.00
12/29/2013 0.15
12/30/2013 0.00
12/31/2013 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2014 0.00
1/2/2014 0.04
1/3/2014 0.00
1/4/2014 0.23
1/5/2014 0.11
1/6/2014 0.04
1/7/2014 0.00
1/8/2014 0.00
1/9/2014 0.00
1/10/2014 0.00
1/11/2014 0.00
1/12/2014 0.00
1/13/2014 0.00
1/14/2014 T
1/15/2014 0.00
1/16/2014 0.00
1/17/2014 0.00
1/18/2014 0.00
1/19/2014 0.00
1/20/2014 0.00
1/21/2014 0.00
1/22/2014 0.00
1/23/2014 0.12
1/24/2014 T
1/25/2014 0.00
1/26/2014 0.00
1/27/2014 0.03
1/28/2014 0.17
1/29/2014 0.00
1/30/2014 0.00
1/31/2014 0.41
2/1/2014 0.16
2/2/2014 0.02
2/3/2014 0.00
2/4/2014 0.02
2/5/2014 0.09
2/6/2014 T
2/7/2014 0.00
2/8/2014 0.00
2/9/2014 0.00
2/10/2014 T
2/11/2014 T
2/12/2014 0.00
2/13/2014 0.00
2/14/2014 0.00
2/15/2014 0.00
2/16/2014 0.00
2/17/2014 T
2/18/2014 0.00
2/19/2014 0.00
2/20/2014 0.02
2/21/2014 0.00
2/22/2014 0.00
2/23/2014 0.04
2/24/2014 0.00
2/25/2014 0.00
2/26/2014 0.05
2/27/2014 0.00
2/28/2014 0.00
3/1/2014 T
3/2/2014 0.07
3/3/2014 0.00
3/4/2014 0.00
3/5/2014 0.41
3/6/2014 0.00
3/7/2014 0.00
3/8/2014 0.58
3/9/2014 0.00
3/10/2014 0.00
3/11/2014 0.00
3/12/2014 0.08
3/13/2014 0.00
3/14/2014 0.00
3/15/2014 0.00
3/16/2014 0.00
3/17/2014 0.00
3/18/2014 0.00
3/19/2014 0.00
3/20/2014 0.00
3/21/2014 0.00
3/22/2014 0.00
3/23/2014 0.00
3/24/2014 T
3/25/2014 0.00
3/26/2014 0.00
3/27/2014 0.00
3/28/2014 0.00
3/29/2014 0.00
3/30/2014 0.00
3/31/2014 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2014 0.00
4/2/2014 0.00
4/3/2014 0.55
4/4/2014 0.00
4/5/2014 0.00
4/6/2014 0.00
4/7/2014 0.02
4/8/2014 0.00
4/9/2014 0.00
4/10/2014 0.00
4/11/2014 0.00
4/12/2014 0.00
4/13/2014 0.13
4/14/2014 0.23
4/15/2014 0.00
4/16/2014 0.00
4/17/2014 0.00
4/18/2014 0.00
4/19/2014 0.00
4/20/2014 0.09
4/21/2014 0.01
4/22/2014 0.01
4/23/2014 0.00
4/24/2014 0.03
4/25/2014 0.00
4/26/2014 0.00
4/27/2014 T
4/28/2014 0.00
4/29/2014 0.00
4/30/2014 0.00
5/1/2014 0.00
5/2/2014 0.00
5/3/2014 0.00
5/4/2014 0.00
5/5/2014 0.00
5/6/2014 0.00
5/7/2014 0.00
5/8/2014 0.42
5/9/2014 0.08
5/10/2014 T
5/11/2014 0.72
5/12/2014 0.82
5/13/2014 0.04
5/14/2014 T
5/15/2014 T
5/16/2014 0.00
5/17/2014 0.04
5/18/2014 T
5/19/2014 0.00
5/20/2014 0.00
5/21/2014 0.00
5/22/2014 0.38
5/23/2014 0.03
5/24/2014 0.04
5/25/2014 0.40
5/26/2014 0.44
5/27/2014 0.03
5/28/2014 0.00
5/29/2014 0.00
5/30/2014 0.00
5/31/2014 0.44
6/1/2014 0.00
6/2/2014 0.00
6/3/2014 0.00
6/4/2014 0.00
6/5/2014 0.00
6/6/2014 0.02
6/7/2014 0.00
6/8/2014 T
6/9/2014 0.35
6/10/2014 0.00
6/11/2014 0.00
6/12/2014 0.05
6/13/2014 0.06
6/14/2014 0.00
6/15/2014 0.02
6/16/2014 0.00
6/17/2014 0.00
6/18/2014 0.00
6/19/2014 0.11
6/20/2014 0.00
6/21/2014 0.00
6/22/2014 0.03
6/23/2014 T
6/24/2014 0.03
6/25/2014 T
6/26/2014 0.00
6/27/2014 0.00
6/28/2014 0.06
6/29/2014 0.00
6/30/2014 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2014 0.00
7/2/2014 0.00
7/3/2014 0.00
7/4/2014 0.00
7/5/2014 0.12
7/6/2014 0.00
7/7/2014 0.00
7/8/2014 2.22
7/9/2014 0.01
7/10/2014 T
7/11/2014 0.00
7/12/2014 0.02
7/13/2014 T
7/14/2014 0.00
7/15/2014 0.01
7/16/2014 0.00
7/17/2014 0.00
7/18/2014 0.00
7/19/2014 0.00
7/20/2014 0.00
7/21/2014 0.00
7/22/2014 0.00
7/23/2014 0.00
7/24/2014 0.00
7/25/2014 0.07
7/26/2014 0.00
7/27/2014 0.14
7/28/2014 0.00
7/29/2014 0.00
7/30/2014 1.52
7/31/2014 1.50
8/1/2014 0.07
8/2/2014 0.00
8/3/2014 0.00
8/4/2014 0.00
8/5/2014 0.00
8/6/2014 0.00
8/7/2014 T
8/8/2014 0.12
8/9/2014 T
8/10/2014 0.08
8/11/2014 T
8/12/2014 0.00
8/13/2014 0.00
8/14/2014 0.01
8/15/2014 0.05
8/16/2014 0.29
8/17/2014 0.00
8/18/2014 0.00
8/19/2014 0.00
8/20/2014 T
8/21/2014 0.10
8/22/2014 0.01
8/23/2014 0.01
8/24/2014 0.02
8/25/2014 0.00
8/26/2014 0.08
8/27/2014 0.05
8/28/2014 0.05
8/29/2014 0.04
8/30/2014 0.05
8/31/2014 0.02
9/1/2014 0.05
9/2/2014 0.00
9/3/2014 0.00
9/4/2014 0.00
9/5/2014 0.50
9/6/2014 0.05
9/7/2014 T
9/8/2014 0.00
9/9/2014 0.04
9/10/2014 0.41
9/11/2014 0.02
9/12/2014 0.26
9/13/2014 0.02
9/14/2014 0.00
9/15/2014 0.00
9/16/2014 0.00
9/17/2014 0.00
9/18/2014 0.00
9/19/2014 0.00
9/20/2014 0.00
9/21/2014 0.00
9/22/2014 0.06
9/23/2014 0.02
9/24/2014 0.00
9/25/2014 0.00
9/26/2014 0.00
9/27/2014 0.00
9/28/2014 0.00
9/29/2014 0.12
9/30/2014 0.66



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2013 7:00 AM 0.00 0.0 M M M
10/2/2013 7:00 AM 0.00 0.0 M M M
10/3/2013 7:00 AM 0.00 0.0 M M M
10/4/2013 7:00 AM 0.43 0.5 0.03 0.5 0.03 Rain snow mix occurring at end of observation period.
10/5/2013 7:00 AM 0.06 T T M M Rain and snow mix until end of precipitation event.
10/6/2013 7:00 AM 0.00 0.0 M M M
10/7/2013 7:00 AM 0.00 0.0 M M M
10/8/2013 7:00 AM 0.00 0.0 M M M
10/9/2013 7:00 AM 0.00 0.0 M M M
10/10/2013 7:00 AM 0.00 0.0 M M M
10/11/2013 7:00 AM 0.07 T T T T Rain mixed with snow.
10/12/2013 7:00 AM 0.00 0.0 M M M
10/13/2013 7:00 AM 0.00 0.0 M M M
10/14/2013 7:00 AM 0.00 0.0 M M M
10/15/2013 7:00 AM 0.00 0.0 M M M
10/16/2013 7:00 AM T M M M M Snow Flurries observed in the morning. No accumulation.
10/17/2013 7:00 AM 0.00 0.0 M M M
10/18/2013 7:00 AM 0.25 1.0 0.12 1.0 0.12 Precipitation starts as rain and converts to snow over the night.
10/19/2013 7:00 AM 0.00 0.0 M M M
10/20/2013 7:00 AM 0.00 0.0 M M M
10/21/2013 7:00 AM 0.12 T T T T Rain mixed with snow during late afternoon.
10/22/2013 7:00 AM 0.00 0.0 M M M
10/23/2013 7:00 AM 0.00 0.0 M M M
10/24/2013 7:00 AM 0.00 0.0 M M M
10/25/2013 7:00 AM 0.00 0.0 M M M
10/26/2013 7:00 AM 0.00 0.0 M M M
10/27/2013 7:00 AM 0.00 0.0 M M M
10/28/2013 7:00 AM 0.00 0.0 M M M
10/29/2013 7:00 AM 0.05 M M M M Light drizzlebegins in the afternoon that continues through the end of the observation period.
10/30/2013 7:00 AM 0.11 0.3 0.08 0.5 0.08 Light drizzle at begining of observation period. It turns to snow sometime during the night.
10/31/2013 7:00 AM T M M M M Very light drizzle at mid-day.
11/1/2013 7:00 AM 0.00 0.0 M M M
11/2/2013 7:00 AM 0.00 0.0 M M M
11/3/2013 7:00 AM 0.00 0.0 M M M
11/4/2013 7:00 AM 0.00 0.0 M M M
11/5/2013 7:00 AM 0.00 0.0 M M M
11/6/2013 7:00 AM 0.00 0.0 M M M
11/7/2013 7:00 AM 0.00 0.0 M M M
11/8/2013 7:00 AM 0.00 0.0 M M M
11/9/2013 7:00 AM 0.00 0.0 M M M
11/10/2013 7:00 AM 0.00 0.0 M M M
11/11/2013 7:00 AM 0.00 0.0 M M M
11/12/2013 7:00 AM 0.00 0.0 M M M
11/13/2013 7:00 AM 0.00 0.0 M M M
11/14/2013 7:00 AM 0.00 0.0 M M M
11/15/2013 7:00 AM 0.00 0.0 M M M
11/16/2013 7:00 AM 0.00 0.0 M M M
11/17/2013 7:00 AM T M M M M Brief rain blew in and is a result of high winds blowing precipitation over the top of the front range.
11/18/2013 7:00 AM 0.00 0.0 M M M
11/19/2013 7:00 AM 0.00 0.0 M M M
11/20/2013 7:00 AM 0.00 0.0 M M M
11/21/2013 7:00 AM 0.18 2.0 0.21 2.0 0.21 Light snow over night.
11/22/2013 7:00 AM 0.02 T 0.02 T 0.02 Trace of snow over night. It was just a dusting of snow at this location.
11/23/2013 7:00 AM T T T 1.0 M
11/24/2013 7:00 AM 0.00 0.0 0.00 1.0 M
11/25/2013 7:00 AM 0.00 0.0 0.00 T M
11/26/2013 7:00 AM 0.00 0.0 M M M
11/27/2013 7:00 AM 0.00 0.0 M M M
11/28/2013 7:00 AM 0.00 0.0 M M M
11/29/2013 7:00 AM 0.00 0.0 M M M
11/30/2013 7:00 AM 0.00 0.0 M M M
12/1/2013 7:00 AM 0.00 0.0 M M M
12/2/2013 7:00 AM 0.00 0.0 M M M
12/3/2013 7:00 AM 0.00 0.0 M M M
12/4/2013 7:00 AM 0.18 3.9 0.18 4.0 0.18 Very dry snow combined with very cold temperatures for the season. snowing at time of observation
12/5/2013 7:00 AM 0.12 1.2 0.12 4.0 M Snowing at the beginning of the observation period.
12/6/2013 7:00 AM 0.00 0.0 M 4.0 M
12/7/2013 7:00 AM 0.00 0.0 M 4.0 M
12/8/2013 7:00 AM 0.00 0.0 M 3.5 M
12/9/2013 7:00 AM 0.00 0.0 M 3.5 M
12/10/2013 7:00 AM 0.00 0.0 M 3.0 M
12/11/2013 7:00 AM 0.00 0.0 0.00 2.0 M
12/12/2013 7:00 AM 0.00 0.0 0.00 1.0 M
12/13/2013 7:00 AM 0.00 0.0 0.00 1.0 M Old snowfall snow cover.
12/14/2013 7:00 AM 0.00 0.0 0.00 0.5 M Old snow cover on the ground is reported here.
12/15/2013 7:00 AM 0.00 0.0 0.00 T M Old snow cover reported here.
12/16/2013 7:00 AM 0.00 0.0 M M M
12/17/2013 7:00 AM 0.00 0.0 M M M
12/18/2013 7:00 AM 0.00 0.0 M M M
12/19/2013 7:00 AM 0.00 0.0 M M M
12/20/2013 7:00 AM T T 0.00 0.0 0.00 Drizzle at the end of observation period. Drizzle is coating trees and then freezes. A great look for the Winter Soltice.
12/21/2013 7:00 AM 0.00 0.0 M M M
12/22/2013 7:00 AM 0.02 T T T T
12/23/2013 7:00 AM 0.04 0.5 0.04 0.5 0.04
12/24/2013 7:00 AM 0.00 0.0 M M M
12/25/2013 7:00 AM 0.00 0.0 M M M
12/26/2013 7:00 AM 0.00 0.0 M M M
12/27/2013 7:00 AM 0.00 0.0 M M M
12/28/2013 7:00 AM 0.00 0.0 M M M
12/29/2013 7:00 AM 0.15 2.5 0.15 2.5 0.15
12/30/2013 7:00 AM 0.00 0.0 0.00 0.5 M
12/31/2013 7:00 AM 0.00 0.0 M M M
1/1/2014 7:00 AM 0.00 0.0 M M M
1/2/2014 7:00 AM 0.04 1.1 0.04 1.0 0.04
1/3/2014 7:00 AM 0.00 0.0 0.00 0.5 M
1/4/2014 7:00 AM 0.23 3.8 0.23 3.8 0.23 Estimate of when snow began. Snowing at time of observation
1/5/2014 7:00 AM 0.11 2.5 0.11 6.0 M Snowing at time of observation. Continuous snowfall for the most part during the observation period.
1/6/2014 7:00 AM 0.04 0.4 0.04 4.5 M Snow fall intensity varied during observation period.
1/7/2014 7:00 AM 0.00 0.0 0.00 3.0 M
1/8/2014 7:00 AM 0.00 0.0 0.00 1.5 M
1/9/2014 7:00 AM 0.00 0.0 0.00 1.0 M
1/10/2014 7:00 AM 0.00 0.0 0.00 0.5 M
1/11/2014 7:00 AM 0.00 0.0 0.00 T M
1/12/2014 7:00 AM 0.00 0.0 M M M
1/13/2014 7:00 AM 0.00 0.0 M M M
1/14/2014 7:00 AM T T T T T Snow Flurries in the air at the end of the observation period.
1/15/2014 7:00 AM 0.00 0.0 M M M
1/16/2014 7:00 AM 0.00 0.0 M M M
1/17/2014 7:00 AM 0.00 0.0 M M M
1/18/2014 7:00 AM 0.00 0.0 M M M
1/19/2014 7:00 AM 0.00 0.0 M M M
1/20/2014 7:00 AM 0.00 0.0 M M M
1/21/2014 7:00 AM 0.00 0.0 M M M
1/22/2014 7:00 AM 0.00 0.0 M M M
1/23/2014 7:00 AM 0.12 3.5 0.12 3.5 0.12 Snowing at time of observation.
1/24/2014 7:00 AM T T T 2.0 M One or two snow flakes per minute at time observation began. Snow quickly ended
1/25/2014 7:00 AM 0.00 0.0 0.00 T M
1/26/2014 7:00 AM 0.00 0.0 M M M
1/27/2014 7:00 AM 0.03 1.8 0.03 2.0 0.03 Light snow flurries at time of observation.
1/28/2014 7:00 AM 0.17 2.5 0.17 3.5 M Duration information is for second wave of snow that came in during the afternoon. There were flurries in the air at the beginning of the observation but they ended before 8 AM. The second wave of snow began in the afternoon.
1/29/2014 7:00 AM 0.00 0.0 0.00 2.0 M
1/30/2014 7:00 AM 0.00 0.0 M M M
1/31/2014 7:00 AM 0.41 3.3 0.35 3.8 0.41 A wet snow that is unusual for late January.
2/1/2014 7:00 AM 0.16 3.0 0.16 6.1 M
2/2/2014 7:00 AM 0.02 0.5 0.02 6.0 M
2/3/2014 7:00 AM 0.00 0.0 0.00 6.0 M
2/4/2014 7:00 AM 0.02 0.3 0.02 5.0 M
2/5/2014 7:00 AM 0.09 1.5 0.09 6.0 M Light Snow for nearly the entire day.
2/6/2014 7:00 AM T T T 6.0 M Snow flurries very earlier during observation period
2/7/2014 7:00 AM 0.00 0.0 0.00 5.5 M
2/8/2014 7:00 AM 0.00 0.0 0.00 4.0 M
2/9/2014 7:00 AM 0.00 0.0 0.00 2.0 M
2/10/2014 7:00 AM T T T 1.5 M Just a few tiny flakes of snow in amidst the fog.
2/11/2014 7:00 AM T T T 1.5 M
2/12/2014 7:00 AM 0.00 0.0 M M M
2/13/2014 7:00 AM 0.00 0.0 M M M
2/14/2014 7:00 AM 0.00 0.0 M M M
2/15/2014 7:00 AM 0.00 0.0 M M M
2/16/2014 7:00 AM 0.00 0.0 M M M
2/17/2014 7:00 AM T M M M M A very light rain blew across the front range. The precipitation fell as rain because chinook winds had warmed temperatures enough for the precipitation to briefly fall as rain.
2/18/2014 7:00 AM 0.00 0.0 M M M
2/19/2014 7:00 AM 0.00 0.0 M M M
2/20/2014 7:00 AM 0.02 0.3 0.02 0.5 0.02
2/21/2014 7:00 AM 0.00 0.0 M M M
2/22/2014 7:00 AM 0.00 0.0 M M M
2/23/2014 7:00 AM 0.04 0.7 0.04 0.5 0.04 Light Snow during the snow event.
2/24/2014 7:00 AM 0.00 0.0 M M M
2/25/2014 7:00 AM 0.00 0.0 M M M
2/26/2014 7:00 AM 0.05 1.1 0.05 1.0 0.05 Started to snow very lightly at 12:20 PM but intensity increased at 6:20 PM and the majority of snow fell in about one hour.
2/27/2014 7:00 AM 0.00 0.0 M M M
2/28/2014 7:00 AM 0.00 0.0 M M M
3/1/2014 7:00 AM T T T T T Precipitation event started just before end of observation period. A very light freezing drizzle began the event.
3/2/2014 7:00 AM 0.07 1.0 0.07 1.0 0.07 Snowing at beginning of observation period.
3/3/2014 7:00 AM 0.00 0.0 M M M
3/4/2014 7:00 AM 0.00 0.0 M M M
3/5/2014 7:00 AM 0.41 1.8 0.41 1.8 0.41 Rain changes to snow at about 09:30 PM and remains as snowfall until end of precipitation event.
3/6/2014 7:00 AM 0.00 0.0 M M M
3/7/2014 7:00 AM 0.00 0.0 M M M
3/8/2014 7:00 AM 0.58 1.8 0.58 2.0 0.58 Precipitation began as light rain and after one hour turned to snow. Melting of the snow occurred during the entire time it snowed.
3/9/2014 7:00 AM 0.00 0.0 M M M
3/10/2014 7:00 AM 0.00 0.0 M M M
3/11/2014 7:00 AM 0.00 0.0 M M M
3/12/2014 7:00 AM 0.08 0.7 0.08 0.7 0.08
3/13/2014 7:00 AM 0.00 0.0 0.00 T M A small amount of snow remains from yesterday's snow event.
3/14/2014 7:00 AM 0.00 0.0 M M M
3/15/2014 7:00 AM 0.00 0.0 M M M
3/16/2014 7:00 AM 0.00 0.0 M M M
3/17/2014 7:00 AM 0.00 0.0 M M M
3/18/2014 7:00 AM 0.00 0.0 M M M
3/19/2014 7:00 AM 0.00 0.0 M M M
3/20/2014 7:00 AM 0.00 0.0 M M M
3/21/2014 7:00 AM 0.00 0.0 M M M
3/22/2014 7:00 AM 0.00 0.0 M M M
3/23/2014 7:00 AM 0.00 0.0 M M M
3/24/2014 7:00 AM T T T T T Just a few small flakes observed for a brief period of time.
3/25/2014 7:00 AM 0.00 0.0 M M M
3/26/2014 7:00 AM 0.00 0.0 M M M
3/27/2014 7:00 AM 0.00 0.0 M M M
3/28/2014 7:00 AM 0.00 0.0 M M M
3/29/2014 7:00 AM 0.00 0.0 M M M
3/30/2014 7:00 AM 0.00 0.0 M M M
3/31/2014 7:00 AM 0.00 0.0 M M M
4/1/2014 7:00 AM 0.00 0.0 M M M
4/2/2014 7:00 AM 0.00 0.0 M M M
4/3/2014 7:00 AM 0.55 3.9 0.46 3.9 0.46 Precipitation began as light rain and changes to snow during the night at some time after midnight. Lightly snowing at time of observation this morning.
4/4/2014 7:00 AM 0.00 0.0 M M M
4/5/2014 7:00 AM 0.00 0.0 M M M
4/6/2014 7:00 AM 0.00 0.0 M M M
4/7/2014 7:00 AM 0.02 M M M M A trace of rain during the 5 PM hour and then light rain early this morning.
4/8/2014 7:00 AM 0.00 0.0 M M M
4/9/2014 7:00 AM 0.00 0.0 M M M
4/10/2014 7:00 AM 0.00 0.0 M M M
4/11/2014 7:00 AM 0.00 0.0 M M M
4/12/2014 7:00 AM 0.00 0.0 M M M
4/13/2014 7:00 AM 0.13 M M M M Precipitation fell as all rain before changing to snow after the end of the observation period. See tomorrow's report for snow totals from this storm. Raining at end of observation period.
4/14/2014 7:00 AM 0.23 2.6 0.23 2.6 0.23 Snow often mixed with rain particularly during he morning hours. Temperatures dropped in the afternoon and precipitation became all snow.
4/15/2014 7:00 AM 0.00 0.0 M M M
4/16/2014 7:00 AM 0.00 0.0 M M M
4/17/2014 7:00 AM 0.00 0.0 M M M
4/18/2014 7:00 AM 0.00 0.0 M M M
4/19/2014 7:00 AM 0.00 0.0 M M M
4/20/2014 7:00 AM 0.09 M M M M Off and on rain showers throughout the day and night.
4/21/2014 7:00 AM 0.01 M M M M Brief rain shower in the evening. The rain was enough to wet the streets.
4/22/2014 7:00 AM 0.01 M M M M A brief light rain shower.
4/23/2014 7:00 AM 0.00 0.0 M M M
4/24/2014 7:00 AM 0.03 M M M M Intermittent rain showers during the time indicated. The showers were always light in intensity.
4/25/2014 7:00 AM 0.00 0.0 M M M
4/26/2014 7:00 AM 0.00 0.0 M M M
4/27/2014 7:00 AM T M M M M Brief rain just before the end of the observation period.
4/28/2014 7:00 AM 0.00 0.0 M M M
4/29/2014 7:00 AM 0.00 0.0 M M M
4/30/2014 7:00 AM 0.00 0.0 M M M
5/1/2014 7:00 AM 0.00 0.0 M M M
5/2/2014 7:00 AM 0.00 0.0 M M M
5/3/2014 7:00 AM 0.00 0.0 M M M
5/4/2014 7:00 AM 0.00 0.0 M M M
5/5/2014 7:00 AM 0.00 0.0 M M M
5/6/2014 7:00 AM 0.00 0.0 M M M
5/7/2014 7:00 AM 0.00 0.0 M M M
5/8/2014 7:00 AM 0.42 M M M M Thundershowers begin during evening and bring pea sized hail. It hails from 7:25 to 7:33 PM and briefly rains after the hail. Then a second wave of rain starts sometime after 11 PM and ends during the night. Times that appear below are a guess for when the rail ends. It did not rain continously between the times shown for beginning and end.
5/9/2014 7:00 AM 0.08 M M M M Brief shower in afternoon due to instability.
5/10/2014 7:00 AM T M M M M A very brief shower in afternoon.
5/11/2014 7:00 AM 0.72 0.1 M M M Precipitation began as rain but became a rain snow mix after sunrise. Raining/snowing at end of observation period.
5/12/2014 7:00 AM 0.82 5.1 0.82 5.1 0.82 Precipitation occurred throughout the day but snow became heavy over night. Precipitation occurring for more than 24 hours.
5/13/2014 7:00 AM 0.04 0.1 0.04 T 0.01
5/14/2014 7:00 AM T M M M M 30 second light rain shower due to atmospheric instability.
5/15/2014 7:00 AM T M M M M Brief shower in the morning and again late in the evening. The morning shower lasted one minute and began at 10:30 AM. The times listed below are for the evening shower.
5/16/2014 7:00 AM 0.00 0.0 M M M
5/17/2014 7:00 AM 0.04 M M M M Light rain over night.
5/18/2014 7:00 AM T M M M M Enough rain to wet the side walk.
5/19/2014 7:00 AM 0.00 0.0 M M M
5/20/2014 7:00 AM 0.00 0.0 M M M
5/21/2014 7:00 AM 0.00 0.0 M M M
5/22/2014 7:00 AM 0.38 M M M M It began raining intermittently at 1 PM but the majority of the rain came during the night. See the duration information below.
5/23/2014 7:00 AM 0.03 M M M M Light rain showers in afternoon. Time not recorded.
5/24/2014 7:00 AM 0.04 M M M M Weak thundershowers in afternoon. Time not recorded.
5/25/2014 7:00 AM 0.40 M M M M Heavy rain and light thunder after dark.
5/26/2014 7:00 AM 0.44 M M M M Heavy rain and moderate hail. Please see my separate hail report.
5/27/2014 7:00 AM 0.03 M M M M Intermittent very light rain.
5/28/2014 7:00 AM 0.00 0.0 M M M
5/29/2014 7:00 AM 0.00 0.0 M M M
5/30/2014 7:00 AM 0.00 0.0 M M M
5/31/2014 7:00 AM 0.44 M M M M Mild thundershower with no wind and only a few occurrences of thunder. Rainfall was light to moderate in intensity. No hail observed.
6/1/2014 7:00 AM 0.00 0.0 M M M
6/2/2014 7:00 AM 0.00 0.0 M M M
6/3/2014 7:00 AM 0.00 0.0 M M M
6/4/2014 7:00 AM 0.00 0.0 M M M
6/5/2014 7:00 AM 0.00 0.0 M M M
6/6/2014 7:00 AM 0.02 M M M M Brief rain in afternoon
6/7/2014 7:00 AM 0.00 0.0 M M M
6/8/2014 7:00 AM T M M M M
6/9/2014 7:00 AM 0.35 M M M M Thunder observed at the beginning of the precipitation event and then light to moderate rain steady through out the rest of the event.
6/10/2014 7:00 AM 0.00 0.0 M M M
6/11/2014 7:00 AM 0.00 0.0 M M M
6/12/2014 7:00 AM 0.05 M M M M Brief rain shower in the afternoon followed by very light precipitation (almost drizzle) during the hour before dawn.
6/13/2014 7:00 AM 0.06 M M M M Afternoon showers provide a little rain.
6/14/2014 7:00 AM 0.00 0.0 M M M
6/15/2014 7:00 AM 0.02 M M M M A light rain from high-based thundershowers.
6/16/2014 7:00 AM 0.00 0.0 M M M
6/17/2014 7:00 AM 0.00 0.0 M M M
6/18/2014 7:00 AM 0.00 0.0 M M M
6/19/2014 7:00 AM 0.11 M M M M Mild thundershower with light rain that came straight down.
6/20/2014 7:00 AM 0.00 0.0 M M M
6/21/2014 7:00 AM 0.00 0.0 M M M
6/22/2014 7:00 AM 0.03 M M M M Brief shower but time of the event was not recorded.
6/23/2014 7:00 AM T M M M M Off and on rain drops between the hours indicated below. No organized showers just a few drops then the rain would stop only to start up again with a few drops of rain. Nothing significant.
6/24/2014 7:00 AM 0.03 M M M M Thundershower in afternoon moved rapidly over the area and headed to the northeast.
6/25/2014 7:00 AM T M M M M
6/26/2014 7:00 AM 0.00 0.0 M M M
6/27/2014 7:00 AM 0.00 0.0 M M M
6/28/2014 7:00 AM 0.06 M M M M
6/29/2014 7:00 AM 0.00 0.0 M M M
6/30/2014 7:00 AM 0.00 0.0 M M M
7/1/2014 7:00 AM 0.00 0.0 M M M
7/2/2014 7:00 AM 0.00 0.0 M M M
7/3/2014 7:00 AM 0.00 0.0 M M M
7/4/2014 7:00 AM 0.00 0.0 M M M
7/5/2014 7:00 AM 0.12 M M M M Afternoon thundershowers. Duration information not recorded.
7/6/2014 7:00 AM 0.00 0.0 M M M
7/7/2014 7:00 AM 0.00 0.0 M M M
7/8/2014 7:00 AM 2.22 M M M M Severe thunderstorm begins at 8:20 PM. Pea sized hail begins at 8:25 PM and at 8:35 hail sizes changes. At that point, a few marble sized hail stones are observed mixed in with the pea sized hail. Please see my hail report for more information. Storm subsizes by 09:30. New storm cell spotted on radar over Boulder. Moves over station and heavy downpours begin at 10:30 PM. Rain tapers down after midnight and eventually winds down to upslope drizzle lasting until near end of observation period.
7/9/2014 7:00 AM 0.01 M M M M Drizzle in the morning as a result of upslope conditions. These conditions had settled into the front range after heavy thundershowers passed through the area the night before. It was drizzling at the beginning of the observation period.
7/10/2014 7:00 AM T M M M M Trace of rain with thunder.
7/11/2014 7:00 AM 0.00 0.0 M M M
7/12/2014 7:00 AM 0.02 M M M M Afternoon thundershowers
7/13/2014 7:00 AM T M M M M Afternoon thundershowers
7/14/2014 7:00 AM 0.00 0.0 M M M
7/15/2014 7:00 AM 0.01 M M M M Trace of rain from passing afternoon showers.
7/16/2014 7:00 AM 0.00 0.0 M M M
7/17/2014 7:00 AM 0.00 0.0 M M M
7/18/2014 7:00 AM 0.00 0.0 M M M
7/19/2014 7:00 AM 0.00 0.0 M M M
7/20/2014 7:00 AM 0.00 0.0 M M M
7/21/2014 7:00 AM 0.00 0.0 M M M
7/22/2014 7:00 AM 0.00 0.0 M M M
7/23/2014 7:00 AM 0.00 0.0 M M M
7/24/2014 7:00 AM 0.00 0.0 M M M
7/25/2014 7:00 AM 0.07 M M M M Brief afternoon thundershowers. Time not recorded.
7/26/2014 7:00 AM 0.00 0.0 M M M
7/27/2014 7:00 AM 0.14 M M M M Two rain events occurred. The main event dropped 0.11 inches at the reported times below. A second event occurred towards 7 PM and lasted 5 minutes dropping 0.03 of an inch.
7/28/2014 7:00 AM 0.00 0.0 M M M
7/29/2014 7:00 AM 0.00 0.0 M M M
7/30/2014 7:00 AM 1.52 M M M M Upslope precipitation, at times heavy, throughout the day. Heavy rain periods too numerious to list. Raining at the end of the observation period.
7/31/2014 7:00 AM 1.50 M M M M Continous upslope rain during the most of the day. Raining at the beginning of observation period. Heavy precipation at too numerious times to list.
8/1/2014 7:00 AM 0.07 M M M M Residual rain showers from the 48 hour upslope preciptation event. Raining at the beginning of the observation period. Precipitation was light through out the event.
8/2/2014 7:00 AM 0.00 0.0 M M M
8/3/2014 7:00 AM 0.00 0.0 M M M
8/4/2014 7:00 AM 0.00 0.0 M M M
8/5/2014 7:00 AM 0.00 0.0 M M M
8/6/2014 7:00 AM 0.00 0.0 M M M
8/7/2014 7:00 AM T M M M M
8/8/2014 7:00 AM 0.12 M M M M Thundershowers in the late afternoon and again at 7 PM. Many cloud to ground lightning strikes with both thundershower events. Time shown are for the second thundershower to pass through area. Earlier thundershower occurred at 12:30 PM and lasted 15 minutes. It was a rapidly moving shower.
8/9/2014 7:00 AM T M M M M
8/10/2014 7:00 AM 0.08 M M M M Mild thundershowers in afternoon.
8/11/2014 7:00 AM T M M M M
8/12/2014 7:00 AM 0.00 0.0 M M M
8/13/2014 7:00 AM 0.00 0.0 M M M
8/14/2014 7:00 AM 0.01 M M M M Thundershowers developed late in the afternoon and produced a little rain.
8/15/2014 7:00 AM 0.05 M M M M Afternoon shower.
8/16/2014 7:00 AM 0.29 M M M M Moderate rain from a thundershower that was centered over the observation location. Lightning strikes nearby. No delay between lightning and thunder. No hail or graupel observed.
8/17/2014 7:00 AM 0.00 0.0 M M M
8/18/2014 7:00 AM 0.00 0.0 M M M
8/19/2014 7:00 AM 0.00 0.0 M M M
8/20/2014 7:00 AM T M M M M Trace of rain from a weak high base thundershower.
8/21/2014 7:00 AM 0.10 M M M M Mild thundershowers with frequent lightning rumble through the area late in the evening. Two occurrences of rain one begins at 7:50 and lasts for ten minutes. The second occurrence begins at 08:55 and last for 40 minutes.
8/22/2014 7:00 AM 0.01 M M M M High base thundershowers produced little rain.
8/23/2014 7:00 AM 0.01 M M M M Briefed rain from upslope cloudiness that last most of the day.
8/24/2014 7:00 AM 0.02 M M M M
8/25/2014 7:00 AM 0.00 0.0 M M M
8/26/2014 7:00 AM 0.08 M M M M
8/27/2014 7:00 AM 0.05 M M M M
8/28/2014 7:00 AM 0.05 M M M M
8/29/2014 7:00 AM 0.04 M M M M
8/30/2014 7:00 AM 0.05 M M M M
8/31/2014 7:00 AM 0.02 M M M M
9/1/2014 7:00 AM 0.05 M M M M
9/2/2014 7:00 AM 0.00 0.0 M M M
9/3/2014 7:00 AM 0.00 0.0 M M M
9/4/2014 7:00 AM 0.00 0.0 M M M
9/5/2014 7:00 AM 0.50 M M M M Upslope rain that developed late in the evening and continued most of the night. At times the rain went from light to moderate in intensity.
9/6/2014 7:00 AM 0.05 M M M M Raining at beginning of observation period. Rain was more of a heavy mist.
9/7/2014 7:00 AM T M M M M High base rain clouds produced a few drops of rain in the area.
9/8/2014 7:00 AM 0.00 0.0 M M M
9/9/2014 7:00 AM 0.04 M M M M Light rain in the afternoon. Time of precipitation not recorded.
9/10/2014 7:00 AM 0.41 M M M M Precipitation began in afternoon with a light drizzle that changed to a light rain before changing back to drizzle. The rain ended for several hours beginning at 3 PM and picked up again after 9 AM. A moderate rain was observed just before 5 AM and was reduced to a drizzle at the end of the observation period.
9/11/2014 7:00 AM 0.02 M M M M
9/12/2014 7:00 AM 0.26 M M M M Overnight upslope rains that, at times, were heavy.
9/13/2014 7:00 AM 0.02 M M M M
9/14/2014 7:00 AM 0.00 0.0 M M M
9/15/2014 7:00 AM 0.00 0.0 M M M
9/16/2014 7:00 AM 0.00 0.0 M M M
9/17/2014 7:00 AM 0.00 0.0 M M M
9/18/2014 7:00 AM 0.00 0.0 M M M
9/19/2014 7:00 AM 0.00 0.0 M M M
9/20/2014 7:00 AM 0.00 0.0 M M M
9/21/2014 7:00 AM 0.00 0.0 M M M
9/22/2014 7:00 AM 0.06 M M M M Light rain changing to drizzleat times. Rain began at 05:30 PM but got heavier after 9 PM.
9/23/2014 7:00 AM 0.02 M M M M
9/24/2014 7:00 AM 0.00 0.0 M M M
9/25/2014 7:00 AM 0.00 0.0 M M M
9/26/2014 7:00 AM 0.00 0.0 M M M
9/27/2014 7:00 AM 0.00 0.0 M M M
9/28/2014 7:00 AM 0.00 0.0 M M M
9/29/2014 7:00 AM 0.12 M M M M
9/30/2014 7:00 AM 0.66 M M M M Upslope rain during the early afternoon continuing until very early morning hours.



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
5/7/2014 7:25 PM No hail pad used. 3/8" 1/4" Pea Size Rice Soft|White Ice 8 no damage Continuous True Same time as rain Same time as smaller hail 10-20
5/25/2014 3:10 PM No hail pad deployed. 3/8" 1/4" Pea Size Rice Soft 7 1min minor leaf damage Continuous True Same time as rain After smaller hail
7/7/2014 8:20 PM No hail pad deployed during storm. See my obervation report for 7/8/14 for more information. 1/2" Grape 1/4" Pea Size Rice Mixed|White Ice 20 1min shredded leaves Continuous False After rain After smaller hail 30-40