Station Overview Station Location
Station Number CO-BO-165 Latitude 40.0124
Station Name Boulder 1.8 ESE Longitude -105.2307
County Boulder Elevation (ft) 5266



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 11 1.29 1.56 31 1.56 31 0.00 0 0 4 3 8.8 2 1
Nov 11 0.95 0.91 30 0.91 30 0.00 0 0 2 3 8.8 2 4
Dec 11 0.72 1.85 31 1.85 31 0.00 0 0 8 2 31.4 8 31
Jan 12 0.59 0.35 31 0.35 31 0.00 0 0 5 1 7.7 6 9
Feb 12 0.61 1.82 29 1.82 29 0.00 0 0 7 7 30.3 8 11
March 12 1.83 0.00 31 0.00 31 0.00 0 0 0 6 0.0 0 0
April 12 2.22 1.26 30 1.26 30 0.00 0 0 6 3 1.6 2 0
May 12 2.59 1.68 31 1.68 31 0.00 0 0 6 2 0.0 0 0
June 12 2.03 0.28 30 0.28 30 0.00 0 0 7 6 0.0 0 0
July 12 1.69 3.43 31 3.43 31 0.00 0 0 11 5 0.0 0 0
Aug 12 1.60 0.11 31 0.11 31 0.00 0 0 3 5 0.0 0 0
Sept 12 1.56 2.80 30 2.80 30 0.00 0 0 9 1 0.0 0 0
Water Year Totals: 17.68" 16.05" 366 days 16.05" 366 0.00" 0 days 0 68 days 44 days 88.6" 28 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
10/1/2011 0.00
10/2/2011 0.00
10/3/2011 0.00
10/4/2011 0.00
10/5/2011 T
10/6/2011 0.00
10/7/2011 T
10/8/2011 0.04
10/9/2011 0.24
10/10/2011 T
10/11/2011 0.00
10/12/2011 0.00
10/13/2011 0.00
10/14/2011 0.00
10/15/2011 0.00
10/16/2011 0.00
10/17/2011 0.00
10/18/2011 0.00
10/19/2011 0.00
10/20/2011 0.00
10/21/2011 0.00
10/22/2011 0.00
10/23/2011 0.00
10/24/2011 0.00
10/25/2011 0.00
10/26/2011 0.98
10/27/2011 0.30
10/28/2011 0.00
10/29/2011 0.00
10/30/2011 0.00
10/31/2011 0.00
11/1/2011 0.00
11/2/2011 0.89
11/3/2011 0.02
11/4/2011 0.00
11/5/2011 0.00
11/6/2011 0.00
11/7/2011 0.00
11/8/2011 0.00
11/9/2011 0.00
11/10/2011 0.00
11/11/2011 0.00
11/12/2011 0.00
11/13/2011 0.00
11/14/2011 T
11/15/2011 0.00
11/16/2011 0.00
11/17/2011 0.00
11/18/2011 0.00
11/19/2011 T
11/20/2011 0.00
11/21/2011 0.00
11/22/2011 0.00
11/23/2011 0.00
11/24/2011 0.00
11/25/2011 0.00
11/26/2011 T
11/27/2011 0.00
11/28/2011 0.00
11/29/2011 0.00
11/30/2011 0.00
12/1/2011 0.38
12/2/2011 0.15
12/3/2011 0.24
12/4/2011 0.04
12/5/2011 0.03
12/6/2011 T
12/7/2011 0.00
12/8/2011 0.00
12/9/2011 0.00
12/10/2011 0.00
12/11/2011 0.00
12/12/2011 0.00
12/13/2011 0.00
12/14/2011 0.00
12/15/2011 0.00
12/16/2011 0.00
12/17/2011 0.00
12/18/2011 0.00
12/19/2011 0.00
12/20/2011 0.05
12/21/2011 0.00
12/22/2011 0.92
12/23/2011 0.04
12/24/2011 0.00
12/25/2011 0.00
12/26/2011 0.00
12/27/2011 0.00
12/28/2011 0.00
12/29/2011 0.00
12/30/2011 T
12/31/2011 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2012 0.00
1/2/2012 0.00
1/3/2012 0.00
1/4/2012 0.00
1/5/2012 0.00
1/6/2012 0.00
1/7/2012 0.00
1/8/2012 0.08
1/9/2012 0.00
1/10/2012 0.00
1/11/2012 T
1/12/2012 0.14
1/13/2012 0.00
1/14/2012 0.00
1/15/2012 0.00
1/16/2012 0.00
1/17/2012 0.06
1/18/2012 0.00
1/19/2012 0.00
1/20/2012 0.00
1/21/2012 0.00
1/22/2012 0.00
1/23/2012 0.00
1/24/2012 0.00
1/25/2012 0.01
1/26/2012 0.00
1/27/2012 0.00
1/28/2012 0.06
1/29/2012 0.00
1/30/2012 0.00
1/31/2012 0.00
2/1/2012 0.00
2/2/2012 0.00
2/3/2012 1.03
2/4/2012 0.35
2/5/2012 T
2/6/2012 0.00
2/7/2012 0.11
2/8/2012 0.01
2/9/2012 0.00
2/10/2012 0.00
2/11/2012 0.07
2/12/2012 T
2/13/2012 0.00
2/14/2012 0.00
2/15/2012 T
2/16/2012 T
2/17/2012 0.00
2/18/2012 T
2/19/2012 0.00
2/20/2012 0.01
2/21/2012 0.00
2/22/2012 0.00
2/23/2012 0.24
2/24/2012 T
2/25/2012 0.00
2/26/2012 0.00
2/27/2012 0.00
2/28/2012 0.00
2/29/2012 T
3/1/2012 0.00
3/2/2012 T
3/3/2012 T
3/4/2012 0.00
3/5/2012 0.00
3/6/2012 0.00
3/7/2012 T
3/8/2012 T
3/9/2012 0.00
3/10/2012 0.00
3/11/2012 0.00
3/12/2012 T
3/13/2012 0.00
3/14/2012 0.00
3/15/2012 0.00
3/16/2012 0.00
3/17/2012 0.00
3/18/2012 0.00
3/19/2012 T
3/20/2012 0.00
3/21/2012 0.00
3/22/2012 0.00
3/23/2012 0.00
3/24/2012 0.00
3/25/2012 0.00
3/26/2012 0.00
3/27/2012 0.00
3/28/2012 0.00
3/29/2012 0.00
3/30/2012 0.00
3/31/2012 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2012 0.00
4/2/2012 0.00
4/3/2012 0.11
4/4/2012 0.32
4/5/2012 0.00
4/6/2012 T
4/7/2012 0.00
4/8/2012 0.00
4/9/2012 0.00
4/10/2012 0.00
4/11/2012 0.00
4/12/2012 0.23
4/13/2012 0.00
4/14/2012 0.00
4/15/2012 0.54
4/16/2012 0.04
4/17/2012 0.00
4/18/2012 0.00
4/19/2012 0.00
4/20/2012 T
4/21/2012 0.00
4/22/2012 0.00
4/23/2012 0.00
4/24/2012 0.00
4/25/2012 0.00
4/26/2012 0.00
4/27/2012 0.02
4/28/2012 T
4/29/2012 0.00
4/30/2012 0.00
5/1/2012 0.00
5/2/2012 0.00
5/3/2012 0.00
5/4/2012 0.00
5/5/2012 0.00
5/6/2012 0.00
5/7/2012 0.49
5/8/2012 0.33
5/9/2012 0.00
5/10/2012 0.00
5/11/2012 0.00
5/12/2012 0.16
5/13/2012 0.04
5/14/2012 T
5/15/2012 0.00
5/16/2012 0.00
5/17/2012 0.00
5/18/2012 0.00
5/19/2012 0.00
5/20/2012 0.13
5/21/2012 T
5/22/2012 0.00
5/23/2012 0.00
5/24/2012 0.53
5/25/2012 0.00
5/26/2012 0.00
5/27/2012 0.00
5/28/2012 0.00
5/29/2012 0.00
5/30/2012 0.00
5/31/2012 0.00
6/1/2012 0.00
6/2/2012 T
6/3/2012 T
6/4/2012 T
6/5/2012 0.00
6/6/2012 T
6/7/2012 0.05
6/8/2012 T
6/9/2012 0.00
6/10/2012 0.00
6/11/2012 0.00
6/12/2012 0.00
6/13/2012 0.00
6/14/2012 0.00
6/15/2012 0.07
6/16/2012 T
6/17/2012 0.00
6/18/2012 0.00
6/19/2012 0.00
6/20/2012 0.00
6/21/2012 0.00
6/22/2012 0.00
6/23/2012 0.00
6/24/2012 0.00
6/25/2012 0.01
6/26/2012 0.00
6/27/2012 0.02
6/28/2012 0.02
6/29/2012 0.04
6/30/2012 0.07
Day of YearDaily PrcpMultiday Prcp
7/1/2012 0.00
7/2/2012 0.00
7/3/2012 0.11
7/4/2012 0.00
7/5/2012 0.00
7/6/2012 0.29
7/7/2012 0.44
7/8/2012 1.62
7/9/2012 0.06
7/10/2012 0.34
7/11/2012 0.00
7/12/2012 0.00
7/13/2012 T
7/14/2012 0.00
7/15/2012 0.00
7/16/2012 T
7/17/2012 0.09
7/18/2012 0.00
7/19/2012 0.00
7/20/2012 0.00
7/21/2012 0.00
7/22/2012 0.00
7/23/2012 0.00
7/24/2012 0.13
7/25/2012 0.18
7/26/2012 T
7/27/2012 0.00
7/28/2012 T
7/29/2012 T
7/30/2012 0.07
7/31/2012 0.10
8/1/2012 0.00
8/2/2012 0.07
8/3/2012 T
8/4/2012 0.00
8/5/2012 0.00
8/6/2012 0.00
8/7/2012 T
8/8/2012 0.00
8/9/2012 0.00
8/10/2012 0.00
8/11/2012 0.00
8/12/2012 0.02
8/13/2012 0.00
8/14/2012 0.00
8/15/2012 0.00
8/16/2012 T
8/17/2012 T
8/18/2012 0.00
8/19/2012 0.00
8/20/2012 0.00
8/21/2012 0.00
8/22/2012 0.00
8/23/2012 0.02
8/24/2012 T
8/25/2012 0.00
8/26/2012 0.00
8/27/2012 0.00
8/28/2012 0.00
8/29/2012 0.00
8/30/2012 0.00
8/31/2012 0.00
9/1/2012 0.00
9/2/2012 0.06
9/3/2012 T
9/4/2012 0.00
9/5/2012 0.00
9/6/2012 0.00
9/7/2012 0.03
9/8/2012 0.05
9/9/2012 0.00
9/10/2012 0.00
9/11/2012 0.97
9/12/2012 0.28
9/13/2012 0.00
9/14/2012 0.00
9/15/2012 0.00
9/16/2012 0.00
9/17/2012 0.00
9/18/2012 0.00
9/19/2012 0.00
9/20/2012 0.00
9/21/2012 0.00
9/22/2012 0.00
9/23/2012 0.00
9/24/2012 0.00
9/25/2012 0.00
9/26/2012 0.33
9/27/2012 0.87
9/28/2012 0.20
9/29/2012 0.00
9/30/2012 0.01



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2011 7:00 AM 0.00 0.0 M M M
10/2/2011 7:00 AM 0.00 0.0 M M M
10/3/2011 7:00 AM 0.00 0.0 M M M
10/4/2011 7:00 AM 0.00 0.0 M M M
10/5/2011 7:00 AM T 0.0 M M M Sprinkles ~ 3:35-3:45pm (T) Sprinkles ~ 4:25-4:30pm (T) More sprinkles ~ 6:15pm (T)
10/6/2011 7:00 AM 0.00 0.0 M M M
10/7/2011 7:00 AM T 0.0 M M M Brief period of lt sprinkles/rain ~ 3:00-3:15pm (T)
10/8/2011 7:00 AM 0.04 0.0 M M M Lt rain/sprinkles sometime between 3:00-6:00am (.04)
10/9/2011 7:00 AM 0.24 T M M M Periods of drizzle/lt rain ~ 8:15-10:00am (.005) Drizzle becoming lt rain ~ 10:45am, mixing with snow ~ 11:30am-1:00pm, becoming lt rain (.205/T at 2:00pm) Lt rain ending by 3:30pm. Periods of sprinkles/lt rain ~ 4:15pm thru midnight (.03)
10/10/2011 7:00 AM T 0.0 M M M Some sprinkles ~ 4:40pm (T). Moderate frost this morning.
10/11/2011 7:00 AM 0.00 0.0 M M M
10/12/2011 7:00 AM 0.00 0.0 M M M
10/13/2011 7:00 AM 0.00 0.0 M M M
10/14/2011 7:00 AM 0.00 0.0 M M M
10/15/2011 7:00 AM 0.00 0.0 M M M
10/16/2011 7:00 AM 0.00 0.0 M M M
10/17/2011 7:00 AM 0.00 0.0 M M M
10/18/2011 7:00 AM 0.00 0.0 M M M
10/19/2011 7:00 AM 0.00 0.0 M M M
10/20/2011 7:00 AM 0.00 0.0 M M M
10/21/2011 7:00 AM 0.00 0.0 M M M
10/22/2011 7:00 AM 0.00 0.0 M M M
10/23/2011 7:00 AM 0.00 0.0 M M M
10/24/2011 7:00 AM 0.00 0.0 M M M
10/25/2011 7:00 AM 0.00 0.0 M M M
10/26/2011 7:00 AM 0.98 6.3 0.92 6.3 M Lt rain becoming lt/mod snow evening thru 7:00am
10/27/2011 7:00 AM 0.30 2.5 0.30 M M Lt snow most of the day (snow accum may not reflect some melting) Lots of down trees and limbs from heavy snow on leafed trees.
10/28/2011 7:00 AM 0.00 0.0 M M M
10/29/2011 7:00 AM 0.00 0.0 M M M
10/30/2011 7:00 AM 0.00 0.0 M M M
10/31/2011 7:00 AM 0.00 0.0 M M M
11/1/2011 7:00 AM 0.00 0.0 M M M
11/2/2011 7:00 AM 0.89 8.4 0.89 8.4 M Snow ~7:30pm-7:00am
11/3/2011 7:00 AM 0.02 0.4 0.02 M M Lt snow 7:00-10:30am (.02/.4) Periods of flurries 10:30am-12:30pm (T/T)
11/4/2011 7:00 AM 0.00 0.0 M 3.5 M
11/5/2011 7:00 AM 0.00 0.0 M 2.0 M
11/6/2011 7:00 AM 0.00 0.0 M 0.5 M
11/7/2011 7:00 AM 0.00 0.0 M T M
11/8/2011 7:00 AM 0.00 0.0 M M M
11/9/2011 7:00 AM 0.00 0.0 M 0.0 M
11/10/2011 7:00 AM 0.00 0.0 M 0.0 M
11/11/2011 7:00 AM 0.00 0.0 M 0.0 M
11/12/2011 7:00 AM 0.00 0.0 M M M
11/13/2011 7:00 AM 0.00 0.0 M M M Very windy ~ 9:00am-4:30pm. Winds 50+ with gusts to 80-90mph. Broken limbs and downed trees.
11/14/2011 7:00 AM T 0.0 M M M Moderated winds continue most of the day, diminishing at dusk. Lt rain shower sometime between 7:30-9:00pm (T)
11/15/2011 7:00 AM 0.00 0.0 M M M Moderated winds continue most of the day and thru the night (30-40mph gusts)
11/16/2011 7:00 AM 0.00 0.0 M M M Moderated winds continue thru early afternoon (30-40mph gusts).
11/17/2011 7:00 AM 0.00 0.0 M M M
11/18/2011 7:00 AM 0.00 0.0 M M M Strong winds began after midnight continuing at 7:00am, gusts 40-50+ mph.
11/19/2011 7:00 AM T T M 0.0 M Brief lt snow/flurries sometime between 4-6:00am (T)
11/20/2011 7:00 AM 0.00 0.0 M 0.0 M
11/21/2011 7:00 AM 0.00 0.0 M M M
11/22/2011 7:00 AM 0.00 0.0 M 0.0 M
11/23/2011 7:00 AM 0.00 0.0 M M M
11/24/2011 7:00 AM 0.00 0.0 M M M
11/25/2011 7:00 AM 0.00 0.0 M M M
11/26/2011 7:00 AM T 0.0 M 0.0 M Sprinkles/lt rain shower ~ 5:30pm (T)
11/27/2011 7:00 AM 0.00 0.0 M 0.0 M
11/28/2011 7:00 AM 0.00 0.0 M M M
11/29/2011 7:00 AM 0.00 0.0 M M M
11/30/2011 7:00 AM 0.00 0.0 M M M
12/1/2011 7:00 AM 0.38 5.7 0.38 5.7 M Lt/mod snow started sometime around midnight, continuing at 7:00am (.38/5.7)
12/2/2011 7:00 AM 0.15 2.6 0.15 7.0 M Lt/mod snow 7:00am-noon w blustery winds around 8:30-10:30am. (.1/1.9) Occ periods of flurries/lt snow 12:00-4:30pm (.05/.6) Some flurries 4:30-8:00pm (T/.1)
12/3/2011 7:00 AM 0.24 6.6 0.24 11.0 M Flurries/lt snow ~ 9:15pm-4:30am. Lt snow ~ 5:30am, continuing at 7:00am (.24/6.6/11.0)
12/4/2011 7:00 AM 0.04 1.3 0.04 8.5 M Lt snow 7:00-9:30am diminishing to flurries and ending at 11:30am (.04/1.3)
12/5/2011 7:00 AM 0.03 1.0 0.03 7.5 M Lt snow ~ 3:45-8:30pm w a couple of imbedded heavier showers (.03/1.0)
12/6/2011 7:00 AM T T T 6.5 M Flurries ~ 7:40-8:45am (T) Occ flurries between 12:15-1:00pm (T)
12/7/2011 7:00 AM 0.00 0.0 M 5.5 M
12/8/2011 7:00 AM 0.00 0.0 M 5.0 M
12/9/2011 7:00 AM 0.00 0.0 M 5.0 M
12/10/2011 7:00 AM 0.00 0.0 M 4.5 M
12/11/2011 7:00 AM 0.00 0.0 M 4.0 M
12/12/2011 7:00 AM 0.00 0.0 M 4.0 5.20 Core sample kind of fell apart. Did best by using spoon to gather what didn't remain in initial core.
12/13/2011 7:00 AM 0.00 0.0 M 3.5 M
12/14/2011 7:00 AM 0.00 0.0 M 3.5 M
12/15/2011 7:00 AM 0.00 0.0 M 3.5 M
12/16/2011 7:00 AM 0.00 0.0 M 3.5 M
12/17/2011 7:00 AM 0.00 0.0 M 3.5 M
12/18/2011 7:00 AM 0.00 0.0 M 3.0 M
12/19/2011 7:00 AM 0.00 0.0 M 2.5 0.70
12/20/2011 7:00 AM 0.05 0.8 0.05 3.5 M Flurries/lt snow ~ 9:50am-8:00pm (.05/.8)
12/21/2011 7:00 AM 0.00 0.0 M 2.5 M
12/22/2011 7:00 AM 0.92 12.0 0.92 14.5 M Flurries ~ 5:50p, becoming lt/mod snow ~ 6:15-9:00pm. (.25/3") Mod snow ~ 9:45p, continuing at 7:00am (.67/9")
12/23/2011 7:00 AM 0.04 1.4 0.04 13.0 M Lt snow diminishing to flurries 7:00am-12:30pm (.04/1.4)
12/24/2011 7:00 AM 0.00 0.0 M 11.0 M
12/25/2011 7:00 AM 0.00 0.0 M 10.0 M
12/26/2011 7:00 AM 0.00 0.0 M 10.0 M
12/27/2011 7:00 AM 0.00 0.0 M 8.5 M
12/28/2011 7:00 AM 0.00 0.0 M 8.5 M
12/29/2011 7:00 AM 0.00 0.0 M 5.5 M
12/30/2011 7:00 AM T 0.0 M 3.0 M Wind-blown sprinkles ~ 12:15-1:00pm (T)
12/31/2011 7:00 AM 0.00 0.0 M 1.0 M
1/1/2012 7:00 AM 0.00 0.0 M 1.0 M
1/2/2012 7:00 AM 0.00 0.0 M 1.0 0.33
1/3/2012 7:00 AM 0.00 0.0 M 0.5 M
1/4/2012 7:00 AM 0.00 0.0 M T M
1/5/2012 7:00 AM 0.00 0.0 M 0.5 M
1/6/2012 7:00 AM 0.00 0.0 M 0.0 M
1/7/2012 7:00 AM 0.00 0.0 M 0.0 M
1/8/2012 7:00 AM 0.08 0.9 0.08 0.8 M Lt snow ~ 2:45-6:30pm (.08/.9)
1/9/2012 7:00 AM 0.00 0.0 M T M
1/10/2012 7:00 AM 0.00 0.0 M 0.0 M
1/11/2012 7:00 AM T 0.1 T 0.1 T Flurries/lt snow ~ 6:20-7:00am (T/.01)
1/12/2012 7:00 AM 0.14 4.4 0.14 3.0 M Lt snow 7:00-8:20am(T/.1), becoming mod/hvy snow 8:20a-noon (.12/3.7). Mod/lt snow noon-3:10pm (.02/.6)
1/13/2012 7:00 AM 0.00 0.0 M 0.5 M
1/14/2012 7:00 AM 0.00 0.0 M T M
1/15/2012 7:00 AM 0.00 0.0 M 0.0 M
1/16/2012 7:00 AM 0.00 0.0 M 0.0 M
1/17/2012 7:00 AM 0.06 1.4 0.06 1.0 M Occ lt flurries ~ 1:45-2:30pm (T) Lt snow ~ 4:10p, becoming moderate 5:15-5:45p, ending ~6:30p (.06/1.4)
1/18/2012 7:00 AM 0.00 0.0 M T M
1/19/2012 7:00 AM 0.00 0.0 M 0.0 M Very high winds overnight continuing at 7:00am. Damage to trees, lots of 'flying' trash. Easily 35-50 mph sustained winds w gusts over 70mph.
1/20/2012 7:00 AM 0.00 0.0 M 0.0 M Winds moderated nicely during the day making for a very pleasant, warm Jan day. Winds picked up around 9-10:00pm. Sustained overnight winds 15-30 mph with gusts over 50mph.
1/21/2012 7:00 AM 0.00 0.0 M 0.0 M Winds of 10-25mph w gusts to 50mph slowly moderated to lt winds by 4:00pm.
1/22/2012 7:00 AM 0.00 0.0 M 0.0 M
1/23/2012 7:00 AM 0.00 0.0 M 0.0 M
1/24/2012 7:00 AM 0.00 0.0 M M M
1/25/2012 7:00 AM 0.01 0.1 0.01 T M Lt snow ~ 8:05-10:45am (.01/.1)
1/26/2012 7:00 AM 0.00 0.0 M 0.0 M
1/27/2012 7:00 AM 0.00 0.0 M 0.0 M
1/28/2012 7:00 AM 0.06 0.8 0.06 T M Lt am snow showers (.06/.8)
1/29/2012 7:00 AM 0.00 0.0 M 0.0 M
1/30/2012 7:00 AM 0.00 0.0 M 0.0 M
1/31/2012 7:00 AM 0.00 0.0 M 0.0 M
2/1/2012 7:00 AM 0.00 0.0 M 0.0 M
2/2/2012 7:00 AM 0.00 0.0 M 0.0 M
2/3/2012 7:00 AM 1.03 13.3 1.03 12.0 M Lt snow/flurries ~ 6:45pm, becoming lt mod snow by 7:30pm. Mod/hvy snow 7:30-11:00pm (.36/4.8) Mod/hvy snow w occ wind gusts causing drifting 11:00pm-2:30am becoming mod/lt snow thru 7:00am (.67/8.5)
2/4/2012 7:00 AM 0.35 7.4 0.35 17.5 M Lt snow diminishing to flurries by 9:45am, ending ~ 10:40pm (.04/.8) Flurries to lt snow beginning at 1:15pm, ending sometime near/after midnight. (.31/6.6) STORM TOTALS: 1.38" / 20.7"
2/5/2012 7:00 AM T T T M M Lt flurries ~ 7:50-9:30a (T/T)
2/6/2012 7:00 AM 0.00 0.0 M 11.5 1.41
2/7/2012 7:00 AM 0.11 3.6 0.11 13.5 M Lt snow/flurries ~ 9:30pm, continuing at 7:00am (.11/3.6)
2/8/2012 7:00 AM 0.01 0.8 0.10 10.5 M Flurries/lt snow 7:00-10:45am (.01/.7) Periods of flurries ~ 1:00-5:30pm (T.1)
2/9/2012 7:00 AM 0.00 0.0 M M M
2/10/2012 7:00 AM 0.00 0.0 M M M
2/11/2012 7:00 AM 0.07 2.8 0.07 9.0 M Lt snow ~ 9:30pm, ending before 3:00am (.07/2.7) Flurries began sometime after 5:00am, continuing at 7:00am (T/.01)
2/12/2012 7:00 AM T 0.1 T M M Flurries 7:00-9:45am(T/.1) Afternoon flurries (T/T)
2/13/2012 7:00 AM 0.00 0.0 M 7.0 1.44
2/14/2012 7:00 AM 0.00 0.0 M M M
2/15/2012 7:00 AM T T T 4.5 M Brief period of lt graupel/flurries sometime after 5:00am (T/T)
2/16/2012 7:00 AM T T T M M Periods of lt graupel/flurries ~ 7:30-10:45am (T/T)
2/17/2012 7:00 AM 0.00 0.0 M 4.0 M
2/18/2012 7:00 AM T T T M M Brief period of lt flurries sometime between 7:30-9:30pm (T/T)
2/19/2012 7:00 AM 0.00 0.0 M M M
2/20/2012 7:00 AM 0.01 0.2 0.01 4.0 1.10 Brief period of lt/snow sometime between midnight and 2:30am (.01/.2)
2/21/2012 7:00 AM 0.00 0.0 M M M
2/22/2012 7:00 AM 0.00 0.0 M M M
2/23/2012 7:00 AM 0.24 2.1 0.24 2.0 M Very high winds after about 10:30am, 30-50mph w gusts 70-80mph. A few wind-blown sprinkles ~ 10-10:15pm (T/0) Lt snow began sometime after 3:00am. Flurries continue at 7:00am (.24/2.1)
2/24/2012 7:00 AM T T T M M Flurries 7:00-8:45a (T/T) Brief periods of lt snow flurries/shower ~ 11:35-1:50p (T/T)
2/25/2012 7:00 AM 0.00 0.0 M M M
2/26/2012 7:00 AM 0.00 0.0 M 0.0 M Breezy and mild
2/27/2012 7:00 AM 0.00 0.0 M 0.0 M
2/28/2012 7:00 AM 0.00 0.0 M 0.0 M
2/29/2012 7:00 AM T T T 0.0 M Some flurries ~ 8:30am (T/T). Brief lt snow shower/flurries ~ 2:25-2:30pm (T/T)
3/1/2012 7:00 AM 0.00 0.0 M 0.0 M
3/2/2012 7:00 AM T T T 0.0 M Lt flurries ~ 10:30-10:45am (T/T). Flurries ~ 2:20-3:00pm (T/T)
3/3/2012 7:00 AM T T T 0.0 M Brief flurries ~ 2:20-2:30pm (T/T). A few flurries/lt snow shower ~ 3:45-3:55pm (T/T) A few flurries ~ 4:55pm (T/T)
3/4/2012 7:00 AM 0.00 0.0 M M M
3/5/2012 7:00 AM 0.00 0.0 M 0.0 M Breezy and mild.
3/6/2012 7:00 AM 0.00 0.0 M 0.0 M
3/7/2012 7:00 AM T T T 0.0 M Freezing drizzle mixing w graupel sometime after 5:30am, continuing at 7:00am (T/T).
3/8/2012 7:00 AM T T T 0.0 M Periods of Freezing drizzle mixed w graupel 7:00-9:30am(T/T) Occ drizzle/graupel ~ 11:30a-1:15p (T/T)
3/9/2012 7:00 AM 0.00 0.0 M 0.0 M
3/10/2012 7:00 AM 0.00 0.0 M 0.0 M
3/11/2012 7:00 AM 0.00 0.0 M 0.0 M
3/12/2012 7:00 AM T 0.0 M 0.0 M Occ Sprinkles/lt rain showers ~ 8:00-9:15am (T)
3/13/2012 7:00 AM 0.00 0.0 M 0.0 M
3/14/2012 7:00 AM 0.00 0.0 M 0.0 M
3/15/2012 7:00 AM 0.00 0.0 M 0.0 M
3/16/2012 7:00 AM 0.00 0.0 M 0.0 M
3/17/2012 7:00 AM 0.00 0.0 M 0.0 M
3/18/2012 7:00 AM 0.00 0.0 M M M
3/19/2012 7:00 AM T 0.0 M 0.0 M Some sprinkles.
3/20/2012 7:00 AM 0.00 0.0 M 0.0 M
3/21/2012 7:00 AM 0.00 0.0 M 0.0 M
3/22/2012 7:00 AM 0.00 0.0 M 0.0 M
3/23/2012 7:00 AM 0.00 0.0 M 0.0 M
3/24/2012 7:00 AM 0.00 0.0 M 0.0 M
3/25/2012 7:00 AM 0.00 0.0 M 0.0 M
3/26/2012 7:00 AM 0.00 0.0 M 0.0 M
3/27/2012 7:00 AM 0.00 0.0 M 0.0 M
3/28/2012 7:00 AM 0.00 0.0 M 0.0 M
3/29/2012 7:00 AM 0.00 0.0 M 0.0 M
3/30/2012 7:00 AM 0.00 0.0 M 0.0 M
3/31/2012 7:00 AM 0.00 0.0 M 0.0 M
4/1/2012 7:00 AM 0.00 0.0 M 0.0 M
4/2/2012 7:00 AM 0.00 0.0 M 0.0 M
4/3/2012 7:00 AM 0.11 0.2 0.11 0.0 M
4/4/2012 7:00 AM 0.32 1.4 0.32 0.0 M
4/5/2012 7:00 AM 0.00 0.0 M 0.0 M
4/6/2012 7:00 AM T 0.0 M 0.0 M
4/7/2012 7:00 AM 0.00 0.0 M 0.0 M
4/8/2012 7:00 AM 0.00 0.0 M 0.0 M
4/9/2012 7:00 AM 0.00 0.0 M 0.0 M
4/10/2012 7:00 AM 0.00 0.0 M M M
4/11/2012 7:00 AM 0.00 0.0 M 0.0 M
4/12/2012 7:00 AM 0.23 0.0 M 0.0 M Some sprinkles ~ 4:50-5:10pm (T) TS w/ some mod/hvy rain ~ 10:50-11:15pm (.23)
4/13/2012 7:00 AM 0.00 0.0 M 0.0 M
4/14/2012 7:00 AM 0.00 0.0 M 0.0 M
4/15/2012 7:00 AM 0.54 T T 0.0 0.00 Lt rain ~ 6:15pm-10:00pm (.11) Continuing and changing to a snow mix ~ 12:45am (.50/T) Lt rain/snow mix overnight. (.04/T)
4/16/2012 7:00 AM 0.04 0.0 0.00 0.0 M Periods of lt rain/sprinkles. (.04)
4/17/2012 7:00 AM 0.00 0.0 M 0.0 M
4/18/2012 7:00 AM 0.00 0.0 M 0.0 M
4/19/2012 7:00 AM 0.00 0.0 M 0.0 M
4/20/2012 7:00 AM T 0.0 M 0.0 M Brief lt shower ~ 1:36p (T)
4/21/2012 7:00 AM 0.00 0.0 M 0.0 M
4/22/2012 7:00 AM 0.00 0.0 M 0.0 M
4/23/2012 7:00 AM 0.00 0.0 M 0.0 M
4/24/2012 7:00 AM 0.00 0.0 M 0.0 M
4/25/2012 7:00 AM 0.00 0.0 M 0.0 M Boulder record high 87º
4/26/2012 7:00 AM 0.00 0.0 M 0.0 M
4/27/2012 7:00 AM 0.02 0.0 M 0.0 M Lt shower ending by 10:30p (.01) Overnight lt rain sometime between 1-4:00am (.01)
4/28/2012 7:00 AM T 0.0 M 0.0 M Some sprinkles ~ 7:15-7:45am (T)
4/29/2012 7:00 AM 0.00 0.0 M 0.0 M
4/30/2012 7:00 AM 0.00 0.0 M 0.0 M
5/1/2012 7:00 AM 0.00 0.0 M 0.0 M
5/2/2012 7:00 AM 0.00 0.0 M 0.0 M
5/3/2012 7:00 AM 0.00 0.0 M 0.0 M
5/4/2012 7:00 AM 0.00 0.0 M 0.0 M
5/5/2012 7:00 AM 0.00 0.0 M 0.0 M
5/6/2012 7:00 AM 0.00 0.0 M 0.0 M
5/7/2012 7:00 AM 0.49 0.0 M 0.0 M Sprinkles/lt rain began ~ 5:30pm, becoming lt/mod rain ~ 6:15pm (.18 at 8:00pm) No rain at 1:30am (.14) Lt rain sometime after 2:00-7:00am (.17)
5/8/2012 7:00 AM 0.33 0.0 M 0.0 M Lt rain at 7:00am (.10 @ 9am) Lt rain ending ~ 12:30pm (.23)
5/9/2012 7:00 AM 0.00 0.0 M 0.0 M
5/10/2012 7:00 AM 0.00 0.0 M 0.0 M
5/11/2012 7:00 AM 0.00 0.0 M 0.0 M
5/12/2012 7:00 AM 0.16 0.0 M 0.0 M Occ sprinkles ~ 10:45a-12:30p (T), becoming lt rain ~ 12:33-2:10pm (.05) Lt rain/drizzle ~ 3:00-4:10pm (.02) Lt Mid-evening shower ending by 10:00pm (.09)
5/13/2012 7:00 AM 0.04 0.0 M 0.0 M Early evening lt showers sometime between 6:00-8:00pm (.03) Occ overnight sprinkles/drizzle (.01)
5/14/2012 7:00 AM T 0.0 M 0.0 M A bit of drizzle before 8:15am (T)
5/15/2012 7:00 AM 0.00 0.0 M 0.0 M
5/16/2012 7:00 AM 0.00 0.0 M 0.0 M
5/17/2012 7:00 AM 0.00 0.0 M 0.0 M
5/18/2012 7:00 AM 0.00 0.0 M 0.0 M
5/19/2012 7:00 AM 0.00 0.0 M 0.0 M
5/20/2012 7:00 AM 0.13 0.0 M 0.0 M Occ sprinkles/lt drizzle ~ 9:00-10:55am (T) Lt rain/sprinkles 10:55-11:55am (.03) Lt rain ~ 3:50-4:55pm (.09) Overnight shower (.01)
5/21/2012 7:00 AM T 0.0 M 0.0 M A few sprinkles ~ 3:30p (T)
5/22/2012 7:00 AM 0.00 0.0 M M M
5/23/2012 7:00 AM 0.00 0.0 M 0.0 M
5/24/2012 7:00 AM 0.53 0.0 M 0.0 M Periods of sprinkles and brief lt showers ~ 12:20-3:15pm (.01), becoming lt rain 3:15-9:15pm (.51) Overnight shower (.01)
5/25/2012 7:00 AM 0.00 0.0 M M M
5/26/2012 7:00 AM 0.00 0.0 M 0.0 M
5/27/2012 7:00 AM 0.00 0.0 M 0.0 M
5/28/2012 7:00 AM 0.00 0.0 M 0.0 M
5/29/2012 7:00 AM 0.00 0.0 M 0.0 M
5/30/2012 7:00 AM 0.00 0.0 M 0.0 M
5/31/2012 7:00 AM 0.00 0.0 M 0.0 M
6/1/2012 7:00 AM 0.00 0.0 M M M
6/2/2012 7:00 AM T 0.0 M M M
6/3/2012 7:00 AM T 0.0 M M M
6/4/2012 7:00 AM T 0.0 M M M
6/5/2012 7:00 AM 0.00 0.0 M M M
6/6/2012 7:00 AM T 0.0 M M M A few sprinkles ~ 4:55pm (T)
6/7/2012 7:00 AM 0.05 0.0 M M M Sprinkles w thunder ~ 5:05-5:35pm (T) Shower sometime between 7:15-8:15pm (.05)
6/8/2012 7:00 AM T 0.0 M M M Some sprinkles ~ 11:10-11:45am (T)
6/9/2012 7:00 AM 0.00 0.0 M M M
6/10/2012 7:00 AM 0.00 0.0 M M M
6/11/2012 7:00 AM 0.00 0.0 M M M
6/12/2012 7:00 AM 0.00 0.0 M M M Moderately smokey air from Larimer County 'High Park' fire.
6/13/2012 7:00 AM 0.00 0.0 M M M
6/14/2012 7:00 AM 0.00 0.0 M M M
6/15/2012 7:00 AM 0.07 0.0 M M M Overnight shower (.07)
6/16/2012 7:00 AM T 0.0 M M M Sprinkles ~ 12:42p (T)
6/17/2012 7:00 AM 0.00 0.0 M M M
6/18/2012 7:00 AM 0.00 0.0 M M M
6/19/2012 7:00 AM 0.00 0.0 M M M
6/20/2012 7:00 AM 0.00 0.0 M M M
6/21/2012 7:00 AM 0.00 0.0 M M M
6/22/2012 7:00 AM 0.00 0.0 M M M
6/23/2012 7:00 AM 0.00 0.0 M M M
6/24/2012 7:00 AM 0.00 0.0 M M M Tied Boulder record high 102º (highest June temp ever) Quite smokey at observation time from CO forest fires.
6/25/2012 7:00 AM 0.01 0.0 M M M Boulder record high 101º Smokey/hazy day until 4-5:00pm Brief shower w thunder sometime between 7:15-7:50pm (.01)
6/26/2012 7:00 AM 0.00 0.0 M M M
6/27/2012 7:00 AM 0.02 0.0 M M M Occ Sprinkles/brief shower ~ 1:00-1:45pm (.02) Lightning caused fire burns Boulder Mtn Park behind Flatirons. So far this am, very little smoke from area, but warm temps near 80º and sw breezes at 7am may flare it up again.
6/28/2012 7:00 AM 0.02 M M M M Occ periods of sprinkles/lt rain ~ 1:15-6:15pm (.02)
6/29/2012 7:00 AM 0.04 0.0 M M M Occ sprinkles/lt rain 1:00-2:00pm (.04)
6/30/2012 7:00 AM 0.07 0.0 M M M PM shower sometime between 1:30-5:30pm (.07)
7/1/2012 7:00 AM 0.00 0.0 M M M
7/2/2012 7:00 AM 0.00 0.0 M M M
7/3/2012 7:00 AM 0.11 0.0 M M M Lt TS ~ 7:30-8:45p (.11)
7/4/2012 7:00 AM 0.00 0.0 M M M
7/5/2012 7:00 AM 0.00 0.0 M M M
7/6/2012 7:00 AM 0.29 0.0 M M M Brief sprinkles w thunder ~ 3:49pm (T) Lt/mod TS ~ 4:38-4:51p (w/ mod heavy rain ~ 4:41-4:48p). Brief lt pea-sized (soft) hail ~ 4:43p (.29)
7/7/2012 7:00 AM 0.44 0.0 M M M Brief sprinkles/lt shower ~ 2:35-2:45p (.01) Lt Ts ~ 4:30-5:30pm (.07) Lt Evening showers, continuing at 10:30p (.17), ending sometime between 3-5:00am (.19)
7/8/2012 7:00 AM 1.62 0.0 M M M Tstorm w significant cloud rotation began ~ 5:00p w mod-heavy rain, mod rain continuing at 5:33p (1.02) Lt/mod rain continiuing at 9:30p (.41) Late night showers followed by periods of sprinkles/drizzle, ending ~ 5:00am (.19)
7/9/2012 7:00 AM 0.06 0.0 M M M Lt rain shower ~ 7-7:35pm (.04) Overnight shower (.02)
7/10/2012 7:00 AM 0.34 0.0 M M M Rain Shower ~ 9:30-11:00am (.34)
7/11/2012 7:00 AM 0.00 0.0 M M M
7/12/2012 7:00 AM 0.00 0.0 M M M
7/13/2012 7:00 AM T 0.0 M M M A few sprinkles ~ 4:45p (T) More sprinkles ~ 5:05pm (T)
7/14/2012 7:00 AM 0.00 0.0 M M M
7/15/2012 7:00 AM 0.00 0.0 M M M
7/16/2012 7:00 AM T 0.0 M M M Some periods of sprinkles w occ thunder and wind between 4:40-7:15pm (T)
7/17/2012 7:00 AM 0.09 0.0 M M M Ts w lt rain/sprinkles ~ 5:25-5:50p (.06) Sprinkles/lt rain w thunder ~ 5:55-6:30p (.02) Occ sprinkles/lt rain thru 9:00p (.01)
7/18/2012 7:00 AM 0.00 0.0 M M M
7/19/2012 7:00 AM 0.00 0.0 M M M
7/20/2012 7:00 AM 0.00 0.0 M M M
7/21/2012 7:00 AM 0.00 0.0 M M M
7/22/2012 7:00 AM 0.00 0.0 M M M
7/23/2012 7:00 AM 0.00 0.0 M M M
7/24/2012 7:00 AM 0.13 0.0 M M M Sprinkles ~ 4:50 pm (T). Sprinkles at 6:45pm becoming Ts w lt/mod rain ~ 6:55-7:15pm(.11), continued lt rain/sprinkles thru 7:25pm (.02).
7/25/2012 7:00 AM 0.18 0.0 M M M Periods of sprinkles/lt rain starting ~ 9:00p, with a Ts ~ 11:00-12:30a (.18)
7/26/2012 7:00 AM T 0.0 M M M A few sprinkles ~ 3:25pm (T)
7/27/2012 7:00 AM 0.00 0.0 M M M
7/28/2012 7:00 AM T 0.0 M M M Sprinkles w brief rain shower ~12:25-2:00pm (T) Sprinkles/lt rain 2:00-2:50pm (T) Lt sprinkles/shower at 9:30p (T) and 10:15p (T)
7/29/2012 7:00 AM T 0.0 M M M Some sprinkles ~ 5:35pm (T)
7/30/2012 7:00 AM 0.07 0.0 M M M Some sprinkles ~ 2:30-2:50pm (T) More sprinkles w thunder ~ 3:35pm (T) Sprinkles becoming lt rain w occ thunder ~ 6:35-8:00pm (.07)
7/31/2012 7:00 AM 0.10 0.0 M M M
8/1/2012 7:00 AM 0.00 0.0 M M M
8/2/2012 7:00 AM 0.07 0.0 M M M Ts knocked out power (20 min) ~ 2:15-2:25p (.02) Ts w sprinkles/lt rain ~ 4:00-4:10p (T) Ts w lt/mod rain ~ 4:55-5:50pm (.05)
8/3/2012 7:00 AM T 0.0 M M M Sprinkles ~ 4:15pm (T)
8/4/2012 7:00 AM 0.00 0.0 M M M
8/5/2012 7:00 AM 0.00 0.0 M M M
8/6/2012 7:00 AM 0.00 0.0 M M M
8/7/2012 7:00 AM T 0.0 M M M A few sprinkles ~ 2:45pm.
8/8/2012 7:00 AM 0.00 0.0 M M M
8/9/2012 7:00 AM 0.00 0.0 M M M
8/10/2012 7:00 AM 0.00 0.0 M M M
8/11/2012 7:00 AM 0.00 0.0 M M M
8/12/2012 7:00 AM 0.02 0.0 M M M Rain shower sometime between 6:30-10:00pm (.02)
8/13/2012 7:00 AM 0.00 0.0 M M M
8/14/2012 7:00 AM 0.00 0.0 M M M
8/15/2012 7:00 AM 0.00 0.0 M M M
8/16/2012 7:00 AM T 0.0 M M M Brief lt rain shower ~ 5:30pm (T)
8/17/2012 7:00 AM T 0.0 M M M
8/18/2012 7:00 AM 0.00 0.0 M M M
8/19/2012 7:00 AM 0.00 0.0 M M M
8/20/2012 7:00 AM 0.00 0.0 M M M
8/21/2012 7:00 AM 0.00 0.0 M M M
8/22/2012 7:00 AM 0.00 0.0 M M M
8/23/2012 7:00 AM 0.02 0.0 M M M Sprinkles/lt rain ~ 4:07-4:15pm (T) Some sprinkles ~ 5:25p (T) Late night shower (.02)
8/24/2012 7:00 AM T 0.0 M M M Some sprinkles ~ 4:10pm (T)
8/25/2012 7:00 AM 0.00 0.0 M M M
8/26/2012 7:00 AM 0.00 0.0 M M M
8/27/2012 7:00 AM 0.00 0.0 M M M
8/28/2012 7:00 AM 0.00 0.0 M M M
8/29/2012 7:00 AM 0.00 0.0 M M M
8/30/2012 7:00 AM 0.00 0.0 M M M
8/31/2012 7:00 AM 0.00 0.0 M M M
9/1/2012 7:00 AM 0.00 0.0 M M M
9/2/2012 7:00 AM 0.06 0.0 M M M Sprinkles/lt rain ~ 12:25-12:35pm (T) Brief lt/mod rain shower sometime between 2:30-3:00pm (.06)
9/3/2012 7:00 AM T 0.0 M M M Sprinkles/lt showers ~ 4:35-5:05pm (T)
9/4/2012 7:00 AM 0.00 0.0 M M M
9/5/2012 7:00 AM 0.00 0.0 M M M
9/6/2012 7:00 AM 0.00 0.0 M M M
9/7/2012 7:00 AM 0.03 0.0 M M M Lt showers/sprinkles ~ 3-5:00am (.03)
9/8/2012 7:00 AM 0.05 0.0 M M M Occ Sprinkles/lt rain ~ 12:05-12:45pm (.015) Lt Ts ~ 3:00-3:40pm (.035) More sprinkles ~ 4:35-4:50pm (T) Some sprinkles ~ 5:15pm (T)
9/9/2012 7:00 AM 0.00 0.0 M M M
9/10/2012 7:00 AM 0.00 0.0 M M M
9/11/2012 7:00 AM 0.97 0.0 M M M Occ lt sprinkles ~ 1:50-4:45pm (T) Lt rain showers ~ 7:50p, becoming mod rain ~ 4:45am, continuing at 7:00am (.97)
9/12/2012 7:00 AM 0.28 0.0 M M M Mod rain becoming lt rain ~ 7:30am, ending around noon. (.15 @ 9:00a, .12 @ noon) Brief periods of lt drizzle ~ 2:50-7:00pm (.01)
9/13/2012 7:00 AM 0.00 0.0 M M M
9/14/2012 7:00 AM 0.00 0.0 M M M
9/15/2012 7:00 AM 0.00 0.0 M M M
9/16/2012 7:00 AM 0.00 0.0 M M M
9/17/2012 7:00 AM 0.00 0.0 M M M
9/18/2012 7:00 AM 0.00 0.0 M M M
9/19/2012 7:00 AM 0.00 0.0 M M M
9/20/2012 7:00 AM 0.00 0.0 M M M
9/21/2012 7:00 AM 0.00 0.0 M M M
9/22/2012 7:00 AM 0.00 0.0 M M M
9/23/2012 7:00 AM 0.00 0.0 M M M
9/24/2012 7:00 AM 0.00 0.0 M M M
9/25/2012 7:00 AM 0.00 0.0 M M M
9/26/2012 7:00 AM 0.33 0.0 M M M Lt rain shower ~ 3:44-3:55pm (.03) Late evening lt rain continuing into the early morning (.30)
9/27/2012 7:00 AM 0.87 0.0 M M M TS with hail and heavy rain (not observed) (.72) Late evening shower ending ~ 11:00pm (.15)
9/28/2012 7:00 AM 0.20 0.0 M M M Lt/mod rain shower ~ 4-4:30pm (.19) Lt evening shower (.01)
9/29/2012 7:00 AM 0.00 0.0 M M M
9/30/2012 7:00 AM 0.01 0.0 M M M Sprinkles/lt rain ~ 8:30-8:50pm (.01)



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