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 10 1.13 0.71 31 0.71 31 0.00 0 0 7 4 0.0 0 0
Nov 10 1.00 0.38 30 0.38 30 0.00 0 0 6 2 0.8 3 2
Dec 10 0.66 0.29 31 0.29 31 0.00 0 0 2 3 5.5 2 2
Jan 11 0.47 0.60 31 0.60 31 0.00 0 0 4 2 8.8 3 14
Feb 11 0.54 1.12 28 1.12 28 0.00 0 0 7 3 13.9 7 15
March 11 1.61 0.21 31 0.21 31 0.00 0 0 5 4 1.0 3 3
April 11 2.19 1.77 30 1.77 30 0.00 0 0 9 5 3.3 4 3
May 11 2.37 4.14 31 4.14 31 0.00 0 0 12 2 0.1 1 1
June 11 2.04 2.15 30 2.15 30 0.00 0 0 6 0 0.0 0 0
July 11 1.60 3.75 31 3.75 31 0.00 0 0 17 3 0.0 0 0
Aug 11 2.02 0.51 31 0.51 31 0.00 0 0 4 5 0.0 0 0
Sept 11 1.17 1.50 30 1.50 30 0.00 0 0 6 2 0.0 0 0
Water Year Totals: 16.80" 17.13" 365 days 17.13" 365 0.00" 0 days 0 85 days 35 days 33.4" 23 days 40 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
10/1/2010 0.00
10/2/2010 0.00
10/3/2010 T
10/4/2010 0.00
10/5/2010 T
10/6/2010 0.00
10/7/2010 0.22
10/8/2010 0.00
10/9/2010 0.00
10/10/2010 0.00
10/11/2010 0.11
10/12/2010 0.06
10/13/2010 0.28
10/14/2010 0.00
10/15/2010 0.00
10/16/2010 0.00
10/17/2010 0.00
10/18/2010 T
10/19/2010 T
10/20/2010 0.00
10/21/2010 0.00
10/22/2010 0.00
10/23/2010 0.02
10/24/2010 0.00
10/25/2010 0.00
10/26/2010 0.01
10/27/2010 0.00
10/28/2010 0.00
10/29/2010 0.00
10/30/2010 0.00
10/31/2010 0.01
11/1/2010 0.02
11/2/2010 0.00
11/3/2010 0.00
11/4/2010 0.00
11/5/2010 0.00
11/6/2010 0.00
11/7/2010 0.00
11/8/2010 0.00
11/9/2010 0.00
11/10/2010 0.12
11/11/2010 0.06
11/12/2010 0.01
11/13/2010 0.00
11/14/2010 0.00
11/15/2010 0.00
11/16/2010 0.04
11/17/2010 0.13
11/18/2010 0.00
11/19/2010 0.00
11/20/2010 0.00
11/21/2010 0.00
11/22/2010 T
11/23/2010 0.00
11/24/2010 0.00
11/25/2010 0.00
11/26/2010 0.00
11/27/2010 0.00
11/28/2010 0.00
11/29/2010 T
11/30/2010 0.00
12/1/2010 0.00
12/2/2010 0.00
12/3/2010 0.00
12/4/2010 0.00
12/5/2010 0.00
12/6/2010 0.00
12/7/2010 T
12/8/2010 0.00
12/9/2010 0.00
12/10/2010 0.00
12/11/2010 0.00
12/12/2010 0.00
12/13/2010 0.00
12/14/2010 0.00
12/15/2010 0.00
12/16/2010 0.00
12/17/2010 0.03
12/18/2010 T
12/19/2010 0.00
12/20/2010 0.00
12/21/2010 0.00
12/22/2010 0.00
12/23/2010 0.00
12/24/2010 T
12/25/2010 0.00
12/26/2010 0.00
12/27/2010 0.00
12/28/2010 0.00
12/29/2010 0.00
12/30/2010 0.00
12/31/2010 0.26
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.00
1/2/2011 0.00
1/3/2011 0.00
1/4/2011 0.00
1/5/2011 0.00
1/6/2011 0.00
1/7/2011 0.00
1/8/2011 0.00
1/9/2011 0.08
1/10/2011 0.44
1/11/2011 0.00
1/12/2011 0.00
1/13/2011 0.00
1/14/2011 0.00
1/15/2011 0.00
1/16/2011 0.00
1/17/2011 T
1/18/2011 0.01
1/19/2011 0.00
1/20/2011 0.07
1/21/2011 0.00
1/22/2011 0.00
1/23/2011 0.00
1/24/2011 0.00
1/25/2011 0.00
1/26/2011 0.00
1/27/2011 0.00
1/28/2011 0.00
1/29/2011 0.00
1/30/2011 0.00
1/31/2011 T
2/1/2011 0.11
2/2/2011 T
2/3/2011 0.00
2/4/2011 0.05
2/5/2011 0.00
2/6/2011 0.61
2/7/2011 0.04
2/8/2011 0.23
2/9/2011 0.03
2/10/2011 0.00
2/11/2011 0.00
2/12/2011 0.00
2/13/2011 0.00
2/14/2011 0.00
2/15/2011 0.00
2/16/2011 0.00
2/17/2011 0.00
2/18/2011 0.00
2/19/2011 0.00
2/20/2011 0.05
2/21/2011 0.00
2/22/2011 0.00
2/23/2011 0.00
2/24/2011 0.00
2/25/2011 T
2/26/2011 T
2/27/2011 0.00
2/28/2011 0.00
3/1/2011 0.00
3/2/2011 0.00
3/3/2011 0.00
3/4/2011 0.00
3/5/2011 0.00
3/6/2011 0.00
3/7/2011 0.01
3/8/2011 0.01
3/9/2011 T
3/10/2011 0.00
3/11/2011 0.00
3/12/2011 0.00
3/13/2011 0.08
3/14/2011 0.00
3/15/2011 0.00
3/16/2011 0.00
3/17/2011 0.00
3/18/2011 0.08
3/19/2011 0.00
3/20/2011 0.00
3/21/2011 0.00
3/22/2011 T
3/23/2011 0.00
3/24/2011 0.00
3/25/2011 T
3/26/2011 0.00
3/27/2011 0.00
3/28/2011 0.03
3/29/2011 T
3/30/2011 0.00
3/31/2011 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.00
4/2/2011 0.00
4/3/2011 0.00
4/4/2011 0.24
4/5/2011 0.00
4/6/2011 0.00
4/7/2011 T
4/8/2011 0.00
4/9/2011 0.00
4/10/2011 0.22
4/11/2011 0.00
4/12/2011 0.00
4/13/2011 0.00
4/14/2011 0.70
4/15/2011 0.01
4/16/2011 0.00
4/17/2011 0.00
4/18/2011 0.00
4/19/2011 0.24
4/20/2011 T
4/21/2011 0.02
4/22/2011 0.06
4/23/2011 0.00
4/24/2011 T
4/25/2011 0.27
4/26/2011 T
4/27/2011 0.01
4/28/2011 0.00
4/29/2011 0.00
4/30/2011 T
5/1/2011 0.00
5/2/2011 T
5/3/2011 T
5/4/2011 0.00
5/5/2011 0.00
5/6/2011 0.00
5/7/2011 0.00
5/8/2011 0.00
5/9/2011 0.00
5/10/2011 0.00
5/11/2011 0.68
5/12/2011 1.10
5/13/2011 0.14
5/14/2011 0.00
5/15/2011 0.35
5/16/2011 0.02
5/17/2011 0.00
5/18/2011 0.03
5/19/2011 1.02
5/20/2011 0.54
5/21/2011 0.04
5/22/2011 0.00
5/23/2011 0.00
5/24/2011 0.04
5/25/2011 0.16
5/26/2011 0.00
5/27/2011 0.00
5/28/2011 0.00
5/29/2011 0.02
5/30/2011 0.00
5/31/2011 0.00
6/1/2011 0.00
6/2/2011 0.00
6/3/2011 0.00
6/4/2011 0.00
6/5/2011 0.00
6/6/2011 0.00
6/7/2011 0.00
6/8/2011 0.00
6/9/2011 0.02
6/10/2011 0.01
6/11/2011 0.00
6/12/2011 0.00
6/13/2011 0.00
6/14/2011 0.00
6/15/2011 0.00
6/16/2011 0.00
6/17/2011 0.01
6/18/2011 0.05
6/19/2011 0.00
6/20/2011 1.81
6/21/2011 0.25
6/22/2011 0.00
6/23/2011 0.00
6/24/2011 0.00
6/25/2011 0.00
6/26/2011 0.00
6/27/2011 0.00
6/28/2011 0.00
6/29/2011 0.00
6/30/2011 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.20
7/2/2011 T
7/3/2011 0.00
7/4/2011 T
7/5/2011 0.00
7/6/2011 0.04
7/7/2011 0.21
7/8/2011 0.56
7/9/2011 0.33
7/10/2011 0.37
7/11/2011 0.30
7/12/2011 0.11
7/13/2011 0.26
7/14/2011 0.46
7/15/2011 0.06
7/16/2011 0.02
7/17/2011 0.04
7/18/2011 0.00
7/19/2011 0.00
7/20/2011 0.32
7/21/2011 0.03
7/22/2011 0.00
7/23/2011 0.00
7/24/2011 0.00
7/25/2011 0.00
7/26/2011 0.00
7/27/2011 0.33
7/28/2011 0.11
7/29/2011 T
7/30/2011 0.00
7/31/2011 0.00
8/1/2011 0.00
8/2/2011 0.06
8/3/2011 T
8/4/2011 T
8/5/2011 0.01
8/6/2011 0.00
8/7/2011 0.00
8/8/2011 0.00
8/9/2011 0.00
8/10/2011 0.00
8/11/2011 0.00
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 0.00
8/15/2011 T
8/16/2011 0.00
8/17/2011 0.27
8/18/2011 0.00
8/19/2011 0.00
8/20/2011 0.17
8/21/2011 0.00
8/22/2011 0.00
8/23/2011 0.00
8/24/2011 0.00
8/25/2011 0.00
8/26/2011 T
8/27/2011 0.00
8/28/2011 0.00
8/29/2011 T
8/30/2011 0.00
8/31/2011 0.00
9/1/2011 0.00
9/2/2011 T
9/3/2011 0.03
9/4/2011 0.00
9/5/2011 0.00
9/6/2011 0.00
9/7/2011 0.09
9/8/2011 0.34
9/9/2011 0.00
9/10/2011 0.00
9/11/2011 0.00
9/12/2011 0.00
9/13/2011 0.00
9/14/2011 0.00
9/15/2011 0.98
9/16/2011 0.00
9/17/2011 0.00
9/18/2011 0.05
9/19/2011 0.00
9/20/2011 0.00
9/21/2011 T
9/22/2011 0.01
9/23/2011 0.00
9/24/2011 0.00
9/25/2011 0.00
9/26/2011 0.00
9/27/2011 0.00
9/28/2011 0.00
9/29/2011 0.00
9/30/2011 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 0.00 0.0 M M M
10/2/2010 7:00 AM 0.00 0.0 M M M
10/3/2010 7:00 AM T M M M M A few drops of rain toward sunset.
10/4/2010 7:00 AM 0.00 0.0 M M M
10/5/2010 7:00 AM T M M M M A few drops of rain at twilight.
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 7:00 AM 0.22 M M M M Two thundershowers pasted over the observation location at two different times. Both shower events brought brief rain to the location. It is the first significant rain here since August 20th. The total rainfall amount shown is the combination of both showers. The first shower was milder in nature and started at 06:45 PM and lasted about 30 minutes. The second shower was much more robust and brought heavier rain to the area. It began at 12:15 AM and lasted for about 15 minutes.
10/8/2010 7:00 AM 0.00 0.0 M M M
10/9/2010 7:00 AM 0.00 0.0 M M M
10/10/2010 7:00 AM 0.00 0.0 M M M
10/11/2010 7:00 AM 0.11 M M M M Duration information unknown.
10/12/2010 7:00 AM 0.06 M M M M Light steady rain at time of observation.
10/13/2010 7:00 AM 0.28 M M M M Light rain through out most of the morning. Clearing skies beginning at 2 PM. A nice gentle rain.
10/14/2010 7:00 AM 0.00 0.0 M M M
10/15/2010 7:00 AM 0.00 0.0 M M M
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/18/2010 7:00 AM T M M M M A very brief light amount of precipitation occurring around 8:30 PM.
10/19/2010 7:00 AM T M M M M Intermittent drops of rain from about 5 PM until 7 PM. Light froast observed over a large area in and around observation location. First frost of the season. Not a killing frost.
10/20/2010 7:00 AM 0.00 0.0 M M M
10/21/2010 7:00 AM 0.00 0.0 M M M
10/22/2010 7:00 AM 0.00 0.0 M M M
10/23/2010 7:00 AM 0.02 M M M M Brief very light rain.
10/24/2010 7:00 AM 0.00 0.0 M M M
10/25/2010 7:00 AM 0.00 0.0 M M M
10/26/2010 7:00 AM 0.01 M M M M Very light rain. V
10/27/2010 7:00 AM 0.00 0.0 M M M
10/28/2010 7:00 AM 0.00 0.0 M M M The first hard frost of the season occurred this morning.
10/29/2010 7:00 AM 0.00 0.0 M M M
10/30/2010 7:00 AM 0.00 0.0 M M M
10/31/2010 7:00 AM 0.01 M M M M
11/1/2010 7:00 AM 0.02 M M M M Very light rain during the night.
11/2/2010 7:00 AM 0.00 0.0 M M M
11/3/2010 7:00 AM 0.00 0.0 M M M
11/4/2010 7:00 AM 0.00 0.0 M M M
11/5/2010 7:00 AM 0.00 0.0 M M M
11/6/2010 7:00 AM 0.00 0.0 M M M
11/7/2010 7:00 AM 0.00 0.0 M M M
11/8/2010 7:00 AM 0.00 0.0 M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.12 M M M M Snow during the day most of which melted as it reached the ground.
11/11/2010 7:00 AM 0.06 M M M M
11/12/2010 7:00 AM 0.01 M M M M
11/13/2010 7:00 AM 0.00 0.0 M M M
11/14/2010 7:00 AM 0.00 0.0 M M M
11/15/2010 7:00 AM 0.00 0.0 M M M
11/16/2010 7:00 AM 0.04 0.4 0.04 T 0.04
11/17/2010 7:00 AM 0.13 0.3 0.13 0.3 0.13 Precipitation event started as light rain but quickly changed to brief but heavy snow. The event began with strong gusty winds that lasted for 2 minutes before precipitation started. Snow quickly melted.
11/18/2010 7:00 AM 0.00 0.0 M M M
11/19/2010 7:00 AM 0.00 0.0 M M M
11/20/2010 7:00 AM 0.00 0.0 M M M
11/21/2010 7:00 AM 0.00 0.0 M M M
11/22/2010 7:00 AM T 0.1 T 0.1 T A 5 minute period where ice pellets were observed occurred at 12:45 PM but the day was mostly sunny. The main precipitation event occurred in the evening during the times stated below.
11/23/2010 7:00 AM 0.00 0.0 M M M
11/24/2010 7:00 AM 0.00 0.0 M M M
11/25/2010 7:00 AM 0.00 0.0 M M M
11/26/2010 7:00 AM 0.00 0.0 M M M
11/27/2010 7:00 AM 0.00 0.0 M M M
11/28/2010 7:00 AM 0.00 0.0 M M M
11/29/2010 7:00 AM T T T T T Snow flurries occurred for a five minute period at 4:45 PM. However, the trace of snow reported occurred at an unknown time during the night.
11/30/2010 7:00 AM 0.00 0.0 M M M
12/1/2010 7:00 AM 0.00 0.0 M M M
12/2/2010 7:00 AM 0.00 0.0 M M M
12/3/2010 7:00 AM 0.00 0.0 M M M
12/4/2010 7:00 AM 0.00 0.0 M M M
12/5/2010 7:00 AM 0.00 0.0 M M M
12/6/2010 7:00 AM 0.00 0.0 M M M
12/7/2010 7:00 AM T T T T T Brief snow flurries during the 8 PM hour.
12/8/2010 7:00 AM 0.00 0.0 M M M
12/9/2010 7:00 AM 0.00 0.0 M M M
12/10/2010 7:00 AM 0.00 0.0 M M M
12/11/2010 7:00 AM 0.00 0.0 M M M
12/12/2010 7:00 AM 0.00 0.0 M M M
12/13/2010 7:00 AM 0.00 0.0 M M M
12/14/2010 7:00 AM 0.00 0.0 M M M
12/15/2010 7:00 AM 0.00 0.0 M M M
12/16/2010 7:00 AM 0.00 0.0 M M M
12/17/2010 7:00 AM 0.03 1.3 0.03 1.3 0.03 Brief rain between 4 and 5 PM then light snow overnight.
12/18/2010 7:00 AM T T T T T Snow flurries occurring near the beginning of the observation period. The snow flurries lasted for about 35 minutes.
12/19/2010 7:00 AM 0.00 0.0 M M M
12/20/2010 7:00 AM 0.00 0.0 M M M
12/21/2010 7:00 AM 0.00 0.0 M M M
12/22/2010 7:00 AM 0.00 0.0 M M M
12/23/2010 7:00 AM 0.00 0.0 M M M
12/24/2010 7:00 AM T T T T T Snow flurries around 4 PM
12/25/2010 7:00 AM 0.00 0.0 M M M
12/26/2010 7:00 AM 0.00 0.0 M M M
12/27/2010 7:00 AM 0.00 0.0 M M M
12/28/2010 7:00 AM 0.00 0.0 M M M
12/29/2010 7:00 AM 0.00 0.0 M M M
12/30/2010 7:00 AM 0.00 0.0 M M M
12/31/2010 7:00 AM 0.26 4.2 0.26 4.0 0.26
1/1/2011 7:00 AM 0.00 0.0 0.00 3.5 M
1/2/2011 7:00 AM 0.00 0.0 0.00 3.0 M
1/3/2011 7:00 AM 0.00 0.0 M 1.5 M
1/4/2011 7:00 AM 0.00 0.0 0.00 1.5 M
1/5/2011 7:00 AM 0.00 0.0 0.00 1.0 M
1/6/2011 7:00 AM 0.00 0.0 0.00 1.0 M
1/7/2011 7:00 AM 0.00 0.0 0.00 0.5 M
1/8/2011 7:00 AM 0.00 0.0 M M M
1/9/2011 7:00 AM 0.08 0.7 0.08 1.0 0.08 Snowing moderately at time of observation.
1/10/2011 7:00 AM 0.44 6.6 0.46 7.0 0.54 Snowing at the beginning of observation period and snow continues through out the day, evening and night. Light and continuous snow during the precipitation event but at times more moderate snowfall occurred.
1/11/2011 7:00 AM 0.00 0.0 0.00 7.0 M
1/12/2011 7:00 AM 0.00 0.0 0.00 6.0 M
1/13/2011 7:00 AM 0.00 0.0 0.00 4.0 M
1/14/2011 7:00 AM 0.00 0.0 M M M
1/15/2011 7:00 AM 0.00 0.0 M M M
1/16/2011 7:00 AM 0.00 0.0 M M M
1/17/2011 7:00 AM T 0.0 0.00 0.0 M Brief light rain.
1/18/2011 7:00 AM 0.01 0.0 0.00 0.0 M Rain
1/19/2011 7:00 AM 0.00 0.0 M M M
1/20/2011 7:00 AM 0.07 1.5 0.08 1.5 0.08
1/21/2011 7:00 AM 0.00 0.0 0.00 0.5 M
1/22/2011 7:00 AM 0.00 0.0 M M M
1/23/2011 7:00 AM 0.00 0.0 M M M
1/24/2011 7:00 AM 0.00 0.0 M M M
1/25/2011 7:00 AM 0.00 0.0 M M M
1/26/2011 7:00 AM 0.00 0.0 M M M
1/27/2011 7:00 AM 0.00 0.0 M M M
1/28/2011 7:00 AM 0.00 0.0 M M M
1/29/2011 7:00 AM 0.00 0.0 M M M
1/30/2011 7:00 AM 0.00 0.0 M M M
1/31/2011 7:00 AM T T T T T Freezing drizzle changing to snow grains just prior to end of observation period.
2/1/2011 7:00 AM 0.11 1.7 0.10 1.5 0.10 Freezing drizzle occurs just befor observation period and changes to very small snow pellets by 9 AM. It continues to snow throughout the day. Snow is light during most of the day with brief intermittent periods of moderate snow fall.
2/2/2011 7:00 AM T T T 1.5 M Very cold throughout the day. DIA's high temperature for the day is -1 F. Brief light snow pellet active in the afternoon.
2/3/2011 7:00 AM 0.00 0.0 0.00 T M
2/4/2011 7:00 AM 0.05 0.7 0.05 0.5 0.05 Light snow came in very quickly and ended just as quickly.
2/5/2011 7:00 AM 0.00 0.0 M M M
2/6/2011 7:00 AM 0.61 7.2 0.60 7.0 0.60 Snowing at time of observation.
2/7/2011 7:00 AM 0.04 0.3 0.04 6.0 M Snowing at the beginning of the observation period.
2/8/2011 7:00 AM 0.23 3.5 0.23 7.0 M
2/9/2011 7:00 AM 0.03 0.4 0.03 7.0 M
2/10/2011 7:00 AM 0.00 0.0 0.00 7.0 M
2/11/2011 7:00 AM 0.00 0.0 0.00 6.0 M
2/12/2011 7:00 AM 0.00 0.0 0.00 5.5 M
2/13/2011 7:00 AM 0.00 0.0 0.00 4.0 M
2/14/2011 7:00 AM 0.00 0.0 0.00 2.0 M
2/15/2011 7:00 AM 0.00 0.0 0.00 1.0 M
2/16/2011 7:00 AM 0.00 0.0 0.00 0.5 M
2/17/2011 7:00 AM 0.00 0.0 0.00 0.0 M
2/18/2011 7:00 AM 0.00 0.0 M M M
2/19/2011 7:00 AM 0.00 0.0 M M M
2/20/2011 7:00 AM 0.05 0.0 0.00 0.0 0.00 Precipitation fell as light rain.
2/21/2011 7:00 AM 0.00 0.0 M M M
2/22/2011 7:00 AM 0.00 0.0 M M M
2/23/2011 7:00 AM 0.00 0.0 M M M
2/24/2011 7:00 AM 0.00 0.0 M M M
2/25/2011 7:00 AM T T T T T Intermittent snow flurries during the day. Very light snow flurries
2/26/2011 7:00 AM T 0.1 T 0.1 T Very light snowfall between 8 AM and 10 AM and then brief snow flurry activity off and on during daylight hours.
2/27/2011 7:00 AM 0.00 0.0 M M M
2/28/2011 7:00 AM 0.00 0.0 M M M
3/1/2011 7:00 AM 0.00 0.0 M M M
3/2/2011 7:00 AM 0.00 0.0 M M M
3/3/2011 7:00 AM 0.00 0.0 M M M
3/4/2011 7:00 AM 0.00 0.0 M M M
3/5/2011 7:00 AM 0.00 0.0 M M M
3/6/2011 7:00 AM 0.00 0.0 M M M
3/7/2011 7:00 AM 0.01 M M M M Precipitation began just before dawn and was in the form of freezing drizzle. Precipitation occuring at the time of observation.
3/8/2011 7:00 AM 0.01 0.1 0.01 0.1 0.01
3/9/2011 7:00 AM T T T T T Very light and intermittent snow flurries.
3/10/2011 7:00 AM 0.00 0.0 M M M
3/11/2011 7:00 AM 0.00 0.0 M M M
3/12/2011 7:00 AM 0.00 0.0 M M M
3/13/2011 7:00 AM 0.08 M M M M Precipitation was rain.
3/14/2011 7:00 AM 0.00 0.0 M M M
3/15/2011 7:00 AM 0.00 0.0 M M M
3/16/2011 7:00 AM 0.00 0.0 M M M
3/17/2011 7:00 AM 0.00 0.0 M M M
3/18/2011 7:00 AM 0.08 0.5 0.08 0.5 0.08
3/19/2011 7:00 AM 0.00 0.0 M M M
3/20/2011 7:00 AM 0.00 0.0 M M M
3/21/2011 7:00 AM 0.00 0.0 M M M
3/22/2011 7:00 AM T 0.0 0.00 0.0 0.00 A trace of rain occurred during the night.
3/23/2011 7:00 AM 0.00 0.0 M M M
3/24/2011 7:00 AM 0.00 0.0 M M M
3/25/2011 7:00 AM T M M M M A brief rain/drizzle shower occurred during the afternoon.
3/26/2011 7:00 AM 0.00 0.0 M M M
3/27/2011 7:00 AM 0.00 0.0 M M M
3/28/2011 7:00 AM 0.03 0.4 0.03 0.5 0.03
3/29/2011 7:00 AM T T T T T Snowing at the beginning of the obervation period but it quickly ended. Forecast called for the possibility of a small amount of snow over night but it did not occur at observation location.
3/30/2011 7:00 AM 0.00 0.0 M M M
3/31/2011 7:00 AM 0.00 0.0 M M M
4/1/2011 7:00 AM 0.00 0.0 M M M
4/2/2011 7:00 AM 0.00 0.0 M M M
4/3/2011 7:00 AM 0.00 0.0 M M M
4/4/2011 7:00 AM 0.24 0.4 0.01 0.5 0.01 Precipitation event was a combination of rain and snow. Rain/snow mixed with a few drops/flakes falling beginning at 10:30. Precipitation changed to all rain at 12 Noon and was steady. Rain changed to all snow 50 minutes later and it remained snowing until 2:30 PM. The snow that had accumulated on grassy surfaces melted by evening. A second snowfall event occurred during the late evening/early morning hours. It was the snow from the early morning precipitation event that is reported as new snowfall.
4/5/2011 7:00 AM 0.00 0.0 M M M
4/6/2011 7:00 AM 0.00 0.0 M M M
4/7/2011 7:00 AM T M M M M Very, very light rain occurred during the late afternnon. Rainfall was enough to wet the walkways but not enough tc be measured.
4/8/2011 7:00 AM 0.00 0.0 M M M
4/9/2011 7:00 AM 0.00 0.0 M M M
4/10/2011 7:00 AM 0.22 0.5 0.05 0.5 0.05 Graupel showers resulted in precipitation amount recorded and 0.5 of graupel on ground. Amount of graupel reported as new snow in this report. Out
4/11/2011 7:00 AM 0.00 0.0 M M M
4/12/2011 7:00 AM 0.00 0.0 M M M
4/13/2011 7:00 AM 0.00 0.0 M M M
4/14/2011 7:00 AM 0.70 2.3 0.31 2.5 0.31 Precipitation event began as drizzle at 7 PM and changed to snow after 11 PM. It was snowing at the time of observation.
4/15/2011 7:00 AM 0.01 0.1 0.01 0.0 0.00 Snow flurries during the beginning of the observation period quickly ended. Snow quickly melted.
4/16/2011 7:00 AM 0.00 0.0 M M M
4/17/2011 7:00 AM 0.00 0.0 M M M
4/18/2011 7:00 AM 0.00 0.0 M M M
4/19/2011 7:00 AM 0.24 M M M M Precipitation fell as rain only during the late evening and into the night.
4/20/2011 7:00 AM T M M M M A few drops of rain during mid-afternoon.
4/21/2011 7:00 AM 0.02 M M M M It was beginning to rain again at time of observation.
4/22/2011 7:00 AM 0.06 M M M M Light Rain after dark.
4/23/2011 7:00 AM 0.00 0.0 M M M
4/24/2011 7:00 AM T M M M M
4/25/2011 7:00 AM 0.27 M M M M Light steady rain towards evening.
4/26/2011 7:00 AM T M M M M A few drops of rain from a passing cloud.
4/27/2011 7:00 AM 0.01 M M M M Brief amount of rain around 10 PM.
4/28/2011 7:00 AM 0.00 0.0 M M M
4/29/2011 7:00 AM 0.00 0.0 M M M
4/30/2011 7:00 AM T M M M M A few drops oif rain,nothing of consequence
5/1/2011 7:00 AM 0.00 0.0 M M M
5/2/2011 7:00 AM T M M M M Very light rain/snow just before dawn.
5/3/2011 7:00 AM T T T 0.0 0.00 A mixture of snowflurries and rain occurred during the 11 AM hour.
5/4/2011 7:00 AM 0.00 0.0 M M M
5/5/2011 7:00 AM 0.00 0.0 M M M
5/6/2011 7:00 AM 0.00 0.0 M M M
5/7/2011 7:00 AM 0.00 0.0 M M M
5/8/2011 7:00 AM 0.00 0.0 M M M
5/9/2011 7:00 AM 0.00 0.0 M M M
5/10/2011 7:00 AM 0.00 0.0 M M M
5/11/2011 7:00 AM 0.68 0.1 0.06 0.1 0.06 Precipitation event began as rain and continued as rain through out the night switching to snow at 05:50 AM. Just a very wet dusting of snow on the ground at the time of observation. Rain/snow mix at time of observation.
5/12/2011 7:00 AM 1.10 M M M M Continous rain and snow for the 24 hour period. Snowing at the time the observation began but changed back to rain by 8AM and remained as rain for the remainer of the observation time. Snow melted as it touched the ground. Never more than a trace of snow on the ground at any one time.
5/13/2011 7:00 AM 0.14 M M M M
5/14/2011 7:00 AM 0.00 0.0 M M M
5/15/2011 7:00 AM 0.35 M M M M Upslope light rain all day.
5/16/2011 7:00 AM 0.02 M M M M Light drizzle at the beginning of observation period until late morning.
5/17/2011 7:00 AM 0.00 0.0 M M M
5/18/2011 7:00 AM 0.03 M M M M Brief moderate shower from cumulus congestus cloud passing over head.
5/19/2011 7:00 AM 1.02 M M M M Thundershowers beginning the rain at 12:10 PM and moderate rain at times continues through the day.
5/20/2011 7:00 AM 0.54 M M M M Yesterday's rain event continues through midday of this observation period.
5/21/2011 7:00 AM 0.04 M M M M Very mild thundershower passes overhead during 3 o'clock hour.
5/22/2011 7:00 AM 0.00 0.0 M M M
5/23/2011 7:00 AM 0.00 0.0 M M M
5/24/2011 7:00 AM 0.04 M M M M Brief rain shower but no lightning or thunder seen or heard during the shower. Lightning observed in the area at 08:50 PM but no rain associated with the distant lightning. 0.03 measured after late afternoon shower. An additional 0.01 fell during the night.
5/25/2011 7:00 AM 0.16 M M M M Moderate thundershowers begin mid morning and last for a couple of hours. Rain from showers is intermittent. No graupel or hail observed.
5/26/2011 7:00 AM 0.00 0.0 M M M
5/27/2011 7:00 AM 0.00 0.0 M M M
5/28/2011 7:00 AM 0.00 0.0 M M M
5/29/2011 7:00 AM 0.02 M M M M
5/30/2011 7:00 AM 0.00 0.0 M M M
5/31/2011 7:00 AM 0.00 0.0 M M M
6/1/2011 7:00 AM 0.00 0.0 M M M
6/2/2011 7:00 AM 0.00 0.0 M M M
6/3/2011 7:00 AM 0.00 0.0 M M M
6/4/2011 7:00 AM 0.00 0.0 M M M
6/5/2011 7:00 AM 0.00 0.0 M M M
6/6/2011 7:00 AM 0.00 0.0 M M M
6/7/2011 7:00 AM 0.00 0.0 M M M
6/8/2011 7:00 AM 0.00 0.0 M M M
6/9/2011 7:00 AM 0.02 M M M M Thundershower begins at 10:28 PM and rains for 11 minutes. Small marble size hail falls after the first two minutes of rain and lasts for about 3 minutes. Hail is sparce with no damage. Upslope drizzle beginsjust before observation period ends. Less than a trace falls before end of observation period.
6/10/2011 7:00 AM 0.01 M M M M Light rain and drizzle from upslope precipitation.
6/11/2011 7:00 AM 0.00 0.0 M M M
6/12/2011 7:00 AM 0.00 0.0 M M M
6/13/2011 7:00 AM 0.00 0.0 M M M
6/14/2011 7:00 AM 0.00 0.0 M M M Lightning and thunder from a thunderstorm cell just to the south and east of observation area. No rain from the cell. Lightning and thunder occurred during the 9 PM hour. However, Colorado Rockies game delayed for about 90 minutes due to the lightning.
6/15/2011 7:00 AM 0.00 0.0 M M M
6/16/2011 7:00 AM 0.00 0.0 M M M
6/17/2011 7:00 AM 0.01 M M M M
6/18/2011 7:00 AM 0.05 M M M M
6/19/2011 7:00 AM 0.00 0.0 M M M
6/20/2011 7:00 AM 1.81 M M M M Thunder showers begin during early evening and showers become steady and heavy throughout the night. It was still raining at the time of observation.
6/21/2011 7:00 AM 0.25 M M M M Rain showers mixed with sunshine throughout the day. 0.23 inches of rain fell as of 7 PM. Majority of rain fell prior to 4 PM. Another 0.02 inches fell overnight.
6/22/2011 7:00 AM 0.00 0.0 M M M
6/23/2011 7:00 AM 0.00 0.0 M M M
6/24/2011 7:00 AM 0.00 0.0 M M M
6/25/2011 7:00 AM 0.00 0.0 M M M
6/26/2011 7:00 AM 0.00 0.0 M M M
6/27/2011 7:00 AM 0.00 0.0 M M M
6/28/2011 7:00 AM 0.00 0.0 M M M
6/29/2011 7:00 AM 0.00 0.0 M M M
6/30/2011 7:00 AM 0.00 0.0 M M M
7/1/2011 7:00 AM 0.20 M M M M Afternoon thundershower followed by a late evening (9:45 PM) thundershower.
7/2/2011 7:00 AM T M M M M Few drops from a passing afternoon shower.
7/3/2011 7:00 AM 0.00 0.0 M M M
7/4/2011 7:00 AM T M M M M
7/5/2011 7:00 AM 0.00 0.0 M M M
7/6/2011 7:00 AM 0.04 M M M M
7/7/2011 7:00 AM 0.21 M M M M Afternoon Thundershowers
7/8/2011 7:00 AM 0.56 M M M M Afternoon thundershowers bring steady rain through the night time hours. Showers stopped briefly at times but were steady for the most part.
7/9/2011 7:00 AM 0.33 M M M M Afternoon thundershowers but time of occurrence not recorded.
7/10/2011 7:00 AM 0.37 M M M M Afternoon thundershowers but time of occurrence not recorded.
7/11/2011 7:00 AM 0.30 M M M M Total Precipitation occurred from two separate rain events. The first occurred at 02:05 PM when a thunderstorm with a developing wall cloud passed overhead. It dumped 0.15 inches of rain in about 13 minutes. The wall cloud did not develop sufficiently to become a concern. The second rain event occurred at 4:50 PM with the passage of a thundershower which provided a light to moderate rainfall over a time period of about 40 minutes. Both events left 0.15 inches of rain so that for a 24 hour period 0.30 inches had occurred.
7/12/2011 7:00 AM 0.11 M M M M Mild intermittent afternoon thundershowers produce light rain. No hail observed.
7/13/2011 7:00 AM 0.26 M M M M Unusual late night thunderstorms with more lightning than rain. No hail observed.
7/14/2011 7:00 AM 0.46 M M M M Downpour from thundershower ocurring late in the evening.
7/15/2011 7:00 AM 0.06 M M M M Afternoon showers.
7/16/2011 7:00 AM 0.02 M M M M Brief afternoon shower
7/17/2011 7:00 AM 0.04 M M M M Early evening shower
7/18/2011 7:00 AM 0.00 0.0 M M M
7/19/2011 7:00 AM 0.00 0.0 M M M
7/20/2011 7:00 AM 0.32 M M M M Afternoon thundershowers with multiple lightning strikes.
7/21/2011 7:00 AM 0.03 M M M M
7/22/2011 7:00 AM 0.00 0.0 M M M
7/23/2011 7:00 AM 0.00 0.0 M M M
7/24/2011 7:00 AM 0.00 0.0 M M M
7/25/2011 7:00 AM 0.00 0.0 M M M
7/26/2011 7:00 AM 0.00 0.0 M M M
7/27/2011 7:00 AM 0.33 M M M M Afternoon downpour from thundershower.
7/28/2011 7:00 AM 0.11 M M M M Afternoon thundershowers produced moderate rain for a short time then light rain persisted until 8 PM.
7/29/2011 7:00 AM T M M M M A few drops of rain from a nearby thundershower.
7/30/2011 7:00 AM 0.00 0.0 M M M
7/31/2011 7:00 AM 0.00 0.0 M M M
8/1/2011 7:00 AM 0.00 0.0 M M M
8/2/2011 7:00 AM 0.06 M M M M Afternoon thundershower lasting only a few minutes.
8/3/2011 7:00 AM T 0.0 M M M Nearby thundershower drop a little rain in the area.
8/4/2011 7:00 AM T M M M M Trace of rain in late afternoon
8/5/2011 7:00 AM 0.01 M M M M Sun and very light rain in the afternoon.
8/6/2011 7:00 AM 0.00 0.0 M M M
8/7/2011 7:00 AM 0.00 0.0 M M M
8/8/2011 7:00 AM 0.00 0.0 M M M
8/9/2011 7:00 AM 0.00 0.0 M M M
8/10/2011 7:00 AM 0.00 0.0 M M M
8/11/2011 7:00 AM 0.00 0.0 M M M
8/12/2011 7:00 AM 0.00 0.0 M M M
8/13/2011 7:00 AM 0.00 0.0 M M M
8/14/2011 7:00 AM 0.00 0.0 M M M
8/15/2011 7:00 AM T M M M M Off and on sprinkles toward sunset.
8/16/2011 7:00 AM 0.00 0.0 M M M
8/17/2011 7:00 AM 0.27 M M M M Moderate Thundershower that was a result of monsoon flow passes through the area during the late afternoon.
8/18/2011 7:00 AM 0.00 0.0 M M M
8/19/2011 7:00 AM 0.00 0.0 M M M
8/20/2011 7:00 AM 0.17 M M M M Night time thunder showers with no hail observed.
8/21/2011 7:00 AM 0.00 0.0 M M M
8/22/2011 7:00 AM 0.00 0.0 M M M
8/23/2011 7:00 AM 0.00 0.0 M M M
8/24/2011 7:00 AM 0.00 0.0 M M M
8/25/2011 7:00 AM 0.00 0.0 M M M
8/26/2011 7:00 AM T M M M M A few drops of rain from high based thundershowers. However, no thunder or lightning observed in observation area.
8/27/2011 7:00 AM 0.00 0.0 M M M
8/28/2011 7:00 AM 0.00 0.0 M M M
8/29/2011 7:00 AM T M M M M A few drops of rain from high based thundershowers. However, no thunder or lightning observed in observation area.
8/30/2011 7:00 AM 0.00 0.0 M M M
8/31/2011 7:00 AM 0.00 0.0 M M M
9/1/2011 7:00 AM 0.00 0.0 M M M
9/2/2011 7:00 AM T 0.0 M M M
9/3/2011 7:00 AM 0.03 M M M M Developing thundershowers dropped a small amount of rain before they grow into much larger storms to the east.
9/4/2011 7:00 AM 0.00 0.0 M M M
9/5/2011 7:00 AM 0.00 0.0 M M M
9/6/2011 7:00 AM 0.00 0.0 M M M
9/7/2011 7:00 AM 0.09 M M M M Intermitent rain begins towards evening and continues through the night.
9/8/2011 7:00 AM 0.34 M M M M Upslope rain occurs off and on throughout the day.
9/9/2011 7:00 AM 0.00 0.0 M M M
9/10/2011 7:00 AM 0.00 0.0 M M M
9/11/2011 7:00 AM 0.00 0.0 M M M
9/12/2011 7:00 AM 0.00 0.0 M M M
9/13/2011 7:00 AM 0.00 0.0 M M M
9/14/2011 7:00 AM 0.00 0.0 M M M
9/15/2011 7:00 AM 0.98 M M M M A lovely night time rain due to upslope conditions. The time the precipitation began is accurate. The time the precipitation ended is an estimate.
9/16/2011 7:00 AM 0.00 0.0 M M M
9/17/2011 7:00 AM 0.00 0.0 M M M
9/18/2011 7:00 AM 0.05 M M M M Light and intermittent drizzle began at 1:50 PM. Drizzle stopped and very mild thunder shower began at 4:10 and lasted about 30 minutes.
9/19/2011 7:00 AM 0.00 0.0 M M M
9/20/2011 7:00 AM 0.00 0.0 M M M
9/21/2011 7:00 AM T M M M M A brief light rain just before sunset.
9/22/2011 7:00 AM 0.01 M M M M Brief thunder as a very mild thundershower passes through the area.
9/23/2011 7:00 AM 0.00 0.0 M M M
9/24/2011 7:00 AM 0.00 0.0 M M M
9/25/2011 7:00 AM 0.00 0.0 M M M
9/26/2011 7:00 AM 0.00 0.0 M M M
9/27/2011 7:00 AM 0.00 0.0 M M M
9/28/2011 7:00 AM 0.00 0.0 M M M
9/29/2011 7:00 AM 0.00 0.0 M M M
9/30/2011 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
6/8/2011 10:28 PM Did not expose a hail pad. Only a few stones fell. 3/8" 3/8" 3/8" Soft|White Ice 3 1min no damage Intermittent True After rain Same time as smaller hail vertical 0