Station Overview Station Location
Station Number CO-BO-159 Latitude 40.0395
Station Name Boulder 3.6 WNW Longitude -105.3275
County Boulder Elevation (ft) 6906



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 1.46 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 10 1.39 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 10 0.93 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 11 0.79 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 11 0.91 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 11 2.06 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 11 2.78 0.44 11 0.27 8 0.17 3 1 3 1 0.0 0 0
May 11 3.08 4.31 26 3.83 19 0.48 7 2 8 0 6.1 2 2
June 11 2.72 1.24 31 1.24 29 0.00 2 1 6 0 0.0 0 0
July 11 1.92 1.79 31 1.54 24 0.25 7 1 13 0 0.0 0 0
Aug 11 1.93 0.40 30 0.23 19 0.17 11 2 6 0 0.0 0 0
Sept 11 1.74 1.97 32 0.06 13 1.91 19 1 2 0 0.0 0 0
Water Year Totals: 21.71" 10.15" 161 days 7.17" 112 2.98" 49 days 8 38 days 1 days 6.1" 2 days 2 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
10/2/2010
10/3/2010
10/4/2010
10/5/2010
10/6/2010
10/7/2010
10/8/2010
10/9/2010
10/10/2010
10/11/2010
10/12/2010
10/13/2010
10/14/2010
10/15/2010
10/16/2010
10/17/2010
10/18/2010
10/19/2010
10/20/2010
10/21/2010
10/22/2010
10/23/2010
10/24/2010
10/25/2010
10/26/2010
10/27/2010
10/28/2010
10/29/2010
10/30/2010
10/31/2010
11/1/2010
11/2/2010
11/3/2010
11/4/2010
11/5/2010
11/6/2010
11/7/2010
11/8/2010
11/9/2010
11/10/2010
11/11/2010
11/12/2010
11/13/2010
11/14/2010
11/15/2010
11/16/2010
11/17/2010
11/18/2010
11/19/2010
11/20/2010
11/21/2010
11/22/2010
11/23/2010
11/24/2010
11/25/2010
11/26/2010
11/27/2010
11/28/2010
11/29/2010
11/30/2010
12/1/2010
12/2/2010
12/3/2010
12/4/2010
12/5/2010
12/6/2010
12/7/2010
12/8/2010
12/9/2010
12/10/2010
12/11/2010
12/12/2010
12/13/2010
12/14/2010
12/15/2010
12/16/2010
12/17/2010
12/18/2010
12/19/2010
12/20/2010
12/21/2010
12/22/2010
12/23/2010
12/24/2010
12/25/2010
12/26/2010
12/27/2010
12/28/2010
12/29/2010
12/30/2010
12/31/2010
Day of YearDaily PrcpMultiday Prcp
1/1/2011
1/2/2011
1/3/2011
1/4/2011
1/5/2011
1/6/2011
1/7/2011
1/8/2011
1/9/2011
1/10/2011
1/11/2011
1/12/2011
1/13/2011
1/14/2011
1/15/2011
1/16/2011
1/17/2011
1/18/2011
1/19/2011
1/20/2011
1/21/2011
1/22/2011
1/23/2011
1/24/2011
1/25/2011
1/26/2011
1/27/2011
1/28/2011
1/29/2011
1/30/2011
1/31/2011
2/1/2011
2/2/2011
2/3/2011
2/4/2011
2/5/2011
2/6/2011
2/7/2011
2/8/2011
2/9/2011
2/10/2011
2/11/2011
2/12/2011
2/13/2011
2/14/2011
2/15/2011
2/16/2011
2/17/2011
2/18/2011
2/19/2011
2/20/2011
2/21/2011
2/22/2011
2/23/2011
2/24/2011
2/25/2011
2/26/2011
2/27/2011
2/28/2011
3/1/2011
3/2/2011
3/3/2011
3/4/2011
3/5/2011
3/6/2011
3/7/2011
3/8/2011
3/9/2011
3/10/2011
3/11/2011
3/12/2011
3/13/2011
3/14/2011
3/15/2011
3/16/2011
3/17/2011
3/18/2011
3/19/2011
3/20/2011
3/21/2011
3/22/2011
3/23/2011
3/24/2011
3/25/2011
3/26/2011
3/27/2011
3/28/2011
3/29/2011
3/30/2011
3/31/2011
Day of YearDaily PrcpMultiday Prcp
4/1/2011
4/2/2011
4/3/2011
4/4/2011
4/5/2011
4/6/2011
4/7/2011
4/8/2011
4/9/2011
4/10/2011
4/11/2011
4/12/2011
4/13/2011
4/14/2011
4/15/2011
4/16/2011
4/17/2011
4/18/2011
4/19/2011
4/20/2011 0.00
4/21/2011 0.22
4/22/2011 T
4/23/2011 **
4/24/2011 **
4/25/2011 0.17
4/26/2011 0.02
4/27/2011 0.03
4/28/2011 0.00
4/29/2011 0.00
4/30/2011 0.00
5/1/2011
5/2/2011 0.00
5/3/2011
5/4/2011 0.00
5/5/2011
5/6/2011
5/7/2011
5/8/2011
5/9/2011
5/10/2011 **
5/11/2011 0.45 0.00
5/12/2011 1.11
5/13/2011 0.09 **
5/14/2011 **
5/15/2011 **
5/16/2011 **
5/17/2011 0.48
5/18/2011 0.06
5/19/2011 1.31
5/20/2011 0.43
5/21/2011 0.00
5/22/2011 0.00
5/23/2011 0.00
5/24/2011 0.13
5/25/2011 0.25
5/26/2011 0.00
5/27/2011 0.00
5/28/2011 0.00
5/29/2011 0.00
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 0.03
6/10/2011 0.04
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 0.03
6/18/2011 0.00
6/19/2011 0.00
6/20/2011 1.08
6/21/2011 0.03
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 0.03
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.03
7/2/2011 0.00
7/3/2011 0.00
7/4/2011 0.00
7/5/2011 0.00
7/6/2011 0.04
7/7/2011 0.03
7/8/2011 0.62
7/9/2011 0.01
7/10/2011 0.01
7/11/2011 0.19
7/12/2011 0.09
7/13/2011 0.12
7/14/2011 0.36
7/15/2011 **
7/16/2011 **
7/17/2011 M 0.25
7/18/2011 0.00
7/19/2011 0.01
7/20/2011
7/21/2011 0.01
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 0.00
7/28/2011 0.02 **
7/29/2011 **
7/30/2011 **
7/31/2011 **
8/1/2011 **
8/2/2011 **
8/3/2011 **
8/4/2011 **
8/5/2011 **
8/6/2011 **
8/7/2011 **
8/8/2011 0.04
8/9/2011 0.00
8/10/2011 0.00
8/11/2011 0.01
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 0.00
8/15/2011 0.04
8/16/2011 0.00
8/17/2011 0.01
8/18/2011 0.00
8/19/2011 0.00
8/20/2011 **
8/21/2011 0.13
8/22/2011 0.01
8/23/2011 0.00
8/24/2011 0.00
8/25/2011 0.00
8/26/2011 0.00
8/27/2011 0.00
8/28/2011
8/29/2011 0.15
8/30/2011
8/31/2011 0.01 **
9/1/2011 **
9/2/2011 **
9/3/2011 **
9/4/2011 **
9/5/2011 **
9/6/2011 **
9/7/2011 **
9/8/2011 **
9/9/2011 **
9/10/2011 **
9/11/2011 **
9/12/2011 **
9/13/2011 **
9/14/2011 **
9/15/2011 **
9/16/2011 **
9/17/2011 0.01 **
9/18/2011 0.00 **
9/19/2011 0.00 1.91
9/20/2011 0.00
9/21/2011 0.00
9/22/2011 0.05
9/23/2011 0.00
9/24/2011 0.00
9/25/2011 0.00
9/26/2011 0.00
9/27/2011
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
4/20/2011 7:00 AM 0.00 0.0 M M M
4/21/2011 7:00 AM 0.22 M M M M
4/22/2011 7:00 AM T M M M M
4/26/2011 7:00 AM 0.02 M M M M
4/27/2011 7:00 AM 0.03 M 0.03 M M
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 0.00 0.0 M M M
5/2/2011 7:00 AM 0.00 0.0 M M M
5/4/2011 7:00 AM 0.00 0.0 M M M
5/11/2011 7:00 AM 0.45 3.0 M 3.0 M
5/12/2011 7:00 AM 1.11 3.1 M 3.5 M
5/13/2011 7:00 AM 0.09 M M M M
5/18/2011 7:00 AM 0.06 M M M M
5/19/2011 7:00 AM 1.31 M M M M 7 AM - 4 PM = .52 4 PM - 10 PM = .61 10 PM - 12 AM -.18
5/20/2011 7:00 AM 0.43 M M M M
5/21/2011 7:00 AM 0.00 0.0 M M M
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 0.13 M M M M
5/25/2011 7:00 AM 0.25 M M M M
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 0.00 0.0 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 0.03 M M M M Part of this was melted snow, rice sized diameter. Turned in hail board.
6/10/2011 7:00 AM 0.04 M M M M
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
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 0.03 0.0 M M M
6/18/2011 7:00 AM 0.00 0.0 M M M
6/19/2011 7:00 AM 0.00 0.0 M M M
6/20/2011 7:00 AM 1.08 M M M M
6/21/2011 7:00 AM 0.03 0.0 M M M
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
6/28/2011 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 0.03 M M M M
7/1/2011 7:00 AM 0.03 M M M M
7/2/2011 7:00 AM 0.00 0.0 M M M
7/3/2011 7:00 AM 0.00 0.0 M M M
7/4/2011 7:00 AM 0.00 0.0 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 0.03 M M M M
7/8/2011 7:00 AM 0.62 M M M M
7/9/2011 7:00 AM 0.01 M M M M
7/10/2011 7:00 AM 0.01 M M M M
7/11/2011 7:00 AM 0.19 M M M M
7/12/2011 7:00 AM 0.09 M M M M
7/13/2011 7:00 AM 0.12 M M M M
7/14/2011 7:00 AM 0.36 M M M M We had no hail at our house yesterday even though I was watching the whole time it rained. Neighbors at 86 Misty Vale reported a lot of large (~1/2 inch) hail that threatened to break their windows. Other neighbors at 7400 Sunshine Canyon Drive also had a lot of 1/2 inch hail that came down hard and bounced many feet up into the air. It also covered the road and made it almost completely white.
7/17/2011 7:00 AM M M M M M We were out of town on 7/15 & 7/16, so the reading shown above is the total of the precipitation readings on 7/15, 7/16, & 7/17. (edit: daily precip initially recorded as 0.25". MDR will be recorded as this report is deleted. P.G.)
7/18/2011 7:00 AM 0.00 0.0 M M M
7/19/2011 7:00 AM 0.01 M M M M
7/21/2011 7:00 AM 0.01 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 A neighbor at about 7500 Sunshine Canyon Drive had about 15 minutes of rain yesterday afternoon. We got nothing.
7/27/2011 7:00 AM 0.00 0.0 M M M
7/28/2011 7:00 AM 0.02 M 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 0.01 M 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 0.04 M M M M
8/16/2011 7:00 AM 0.00 0.0 M M M
8/17/2011 7:00 AM 0.01 M M M M I walked the length of County Road 83, about 2 miles west of us, this morning and saw signs of significant rainfall, i.e. puddles, mud, and runoff. They must have had significantly more rain than we did.
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
8/22/2011 7:00 AM 0.01 M 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 0.00 0.0 M M M
8/27/2011 7:00 AM 0.00 0.0 M M M
8/29/2011 7:00 AM 0.15 M M M M
8/31/2011 7:00 AM 0.01 M M M M
9/17/2011 7:00 AM 0.01 M M M M
9/18/2011 7:00 AM 0.00 0.0 M M M
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 0.00 0.0 M M M
9/22/2011 7:00 AM 0.05 M M M M
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
9/28/2011 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
4/23/2011 4/25/2011 7:00 AM 3 0.17 0.8 M
5/10/2011 5/11/2011 12:00 AM 2 0.00 0.0 0.00
5/13/2011 5/17/2011 7:00 AM 5 0.48 0.0 M
6/26/2011 6/27/2011 7:00 AM 2 0.00 M M
7/15/2011 7/17/2011 7:00 AM 3 0.25 M M
7/28/2011 8/08/2011 12:00 AM 12 0.04 M M
8/20/2011 8/21/2011 1:00 PM 2 0.13 0.0 M
8/31/2011 9/19/2011 7:00 AM 20 1.91 M 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
4/26/2011 12:20 PM In an unusual manner, the hail was not accompanied by rain and fell at about the same speeed throughout 45 minutes. The hail appeared to all be the same size. (rice/pea size) 1/4" Pea Size 1/4" Pea Size Rice Hard|Mixed|White Ice 45 3min no damage Continuous False 10-20 .45
5/20/2011 3:00 PM This was observed at 11th and Walnut St. in Boulder. CO NA NA 1/4" Pea Size White Ice 7 3min minor leaf damage Continuous True After rain 10-20 .5