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 09 1.29 2.71 31 2.71 31 0.00 0 0 11 5 21.8 6 3
Nov 09 0.95 0.82 30 0.82 30 0.00 0 0 3 1 9.3 3 8
Dec 09 0.72 1.05 31 1.05 31 0.00 0 0 9 3 21.8 10 20
Jan 10 0.59 0.27 31 0.27 31 0.00 0 0 3 3 4.9 4 21
Feb 10 0.61 0.99 28 0.99 28 0.00 0 0 10 2 17.6 10 15
March 10 1.83 2.67 31 2.67 31 0.00 0 0 8 3 22.7 7 9
April 10 2.22 3.12 30 3.12 30 0.00 0 0 10 6 5.8 6 2
May 10 2.59 2.77 31 2.77 31 0.00 0 0 8 4 4.1 2 2
June 10 2.03 2.64 30 2.64 30 0.00 0 0 8 1 0.0 0 0
July 10 1.69 1.83 31 1.83 31 0.00 0 0 12 5 0.0 0 0
Aug 10 1.60 1.43 31 1.43 31 0.00 0 0 11 6 0.0 0 0
Sept 10 1.56 0.21 30 0.21 30 0.00 0 0 2 3 0.0 0 0
Water Year Totals: 17.68" 20.51" 365 days 20.51" 365 0.00" 0 days 0 95 days 42 days 108.0" 48 days 80 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
10/1/2009 0.00
10/2/2009 0.00
10/3/2009 0.00
10/4/2009 0.00
10/5/2009 T
10/6/2009 0.30
10/7/2009 0.00
10/8/2009 0.02
10/9/2009 0.08
10/10/2009 0.17
10/11/2009 0.01
10/12/2009 T
10/13/2009 T
10/14/2009 T
10/15/2009 0.00
10/16/2009 0.00
10/17/2009 0.00
10/18/2009 0.00
10/19/2009 0.00
10/20/2009 0.00
10/21/2009 0.20
10/22/2009 0.12
10/23/2009 0.00
10/24/2009 0.00
10/25/2009 T
10/26/2009 0.14
10/27/2009 0.00
10/28/2009 0.70
10/29/2009 0.90
10/30/2009 0.07
10/31/2009 0.00
11/1/2009 0.00
11/2/2009 0.00
11/3/2009 0.00
11/4/2009 0.00
11/5/2009 0.00
11/6/2009 0.00
11/7/2009 0.00
11/8/2009 0.00
11/9/2009 0.00
11/10/2009 0.00
11/11/2009 0.00
11/12/2009 0.00
11/13/2009 0.00
11/14/2009 0.07
11/15/2009 0.73
11/16/2009 0.02
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.00
11/20/2009 0.00
11/21/2009 0.00
11/22/2009 0.00
11/23/2009 0.00
11/24/2009 0.00
11/25/2009 0.00
11/26/2009 0.00
11/27/2009 0.00
11/28/2009 0.00
11/29/2009 T
11/30/2009 0.00
12/1/2009 0.00
12/2/2009 0.22
12/3/2009 0.03
12/4/2009 T
12/5/2009 0.00
12/6/2009 0.12
12/7/2009 0.05
12/8/2009 0.04
12/9/2009 0.03
12/10/2009 0.00
12/11/2009 0.00
12/12/2009 0.00
12/13/2009 0.00
12/14/2009 T
12/15/2009 0.00
12/16/2009 0.00
12/17/2009 0.00
12/18/2009 0.00
12/19/2009 0.00
12/20/2009 0.00
12/21/2009 0.00
12/22/2009 0.00
12/23/2009 0.23
12/24/2009 0.31
12/25/2009 0.00
12/26/2009 T
12/27/2009 0.02
12/28/2009 0.00
12/29/2009 0.00
12/30/2009 0.00
12/31/2009 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.00
1/2/2010 0.00
1/3/2010 0.00
1/4/2010 0.02
1/5/2010 0.00
1/6/2010 0.00
1/7/2010 0.15
1/8/2010 0.00
1/9/2010 0.00
1/10/2010 0.00
1/11/2010 0.00
1/12/2010 0.00
1/13/2010 0.00
1/14/2010 0.00
1/15/2010 0.00
1/16/2010 0.00
1/17/2010 0.00
1/18/2010 T
1/19/2010 0.00
1/20/2010 0.00
1/21/2010 0.00
1/22/2010 0.00
1/23/2010 0.00
1/24/2010 0.00
1/25/2010 0.00
1/26/2010 0.00
1/27/2010 0.00
1/28/2010 0.10
1/29/2010 T
1/30/2010 T
1/31/2010 0.00
2/1/2010 0.00
2/2/2010 0.00
2/3/2010 0.00
2/4/2010 0.02
2/5/2010 T
2/6/2010 0.00
2/7/2010 0.03
2/8/2010 0.20
2/9/2010 0.05
2/10/2010 0.00
2/11/2010 0.00
2/12/2010 0.00
2/13/2010 0.00
2/14/2010 0.13
2/15/2010 T
2/16/2010 0.00
2/17/2010 0.00
2/18/2010 0.00
2/19/2010 0.17
2/20/2010 0.05
2/21/2010 0.21
2/22/2010 0.11
2/23/2010 0.00
2/24/2010 0.00
2/25/2010 0.00
2/26/2010 0.02
2/27/2010 0.00
2/28/2010 0.00
3/1/2010 0.06
3/2/2010 0.00
3/3/2010 0.00
3/4/2010 0.00
3/5/2010 0.00
3/6/2010 0.00
3/7/2010 0.00
3/8/2010 T
3/9/2010 T
3/10/2010 T
3/11/2010 0.11
3/12/2010 0.00
3/13/2010 0.00
3/14/2010 0.00
3/15/2010 0.28
3/16/2010 0.00
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 0.28
3/20/2010 0.53
3/21/2010 0.00
3/22/2010 0.00
3/23/2010 0.00
3/24/2010 1.38
3/25/2010 0.01
3/26/2010 0.00
3/27/2010 0.02
3/28/2010 0.00
3/29/2010 0.00
3/30/2010 0.00
3/31/2010 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2010 T
4/2/2010 T
4/3/2010 0.00
4/4/2010 0.00
4/5/2010 T
4/6/2010 0.06
4/7/2010 0.10
4/8/2010 0.01
4/9/2010 0.00
4/10/2010 0.00
4/11/2010 0.00
4/12/2010 0.00
4/13/2010 0.00
4/14/2010 0.00
4/15/2010 0.00
4/16/2010 0.00
4/17/2010 0.00
4/18/2010 0.01
4/19/2010 0.00
4/20/2010 0.00
4/21/2010 T
4/22/2010 0.74
4/23/2010 0.63
4/24/2010 0.96
4/25/2010 T
4/26/2010 0.28
4/27/2010 T
4/28/2010 0.00
4/29/2010 0.23
4/30/2010 0.10
5/1/2010 0.01
5/2/2010 0.00
5/3/2010 T
5/4/2010 0.00
5/5/2010 0.00
5/6/2010 0.00
5/7/2010 0.18
5/8/2010 0.00
5/9/2010 0.00
5/10/2010 0.00
5/11/2010 0.00
5/12/2010 1.19
5/13/2010 0.08
5/14/2010 0.15
5/15/2010 0.28
5/16/2010 T
5/17/2010 0.00
5/18/2010 0.00
5/19/2010 0.34
5/20/2010 T
5/21/2010 0.00
5/22/2010 0.00
5/23/2010 0.00
5/24/2010 0.00
5/25/2010 0.00
5/26/2010 0.00
5/27/2010 T
5/28/2010 0.00
5/29/2010 0.00
5/30/2010 0.54
5/31/2010 0.00
6/1/2010 0.00
6/2/2010 0.00
6/3/2010 0.00
6/4/2010 0.00
6/5/2010 0.00
6/6/2010 0.00
6/7/2010 0.00
6/8/2010 0.00
6/9/2010 0.06
6/10/2010 0.00
6/11/2010 0.05
6/12/2010 1.33
6/13/2010 0.61
6/14/2010 0.24
6/15/2010 0.10
6/16/2010 0.00
6/17/2010 T
6/18/2010 0.00
6/19/2010 0.00
6/20/2010 0.00
6/21/2010 0.00
6/22/2010 0.06
6/23/2010 0.00
6/24/2010 0.00
6/25/2010 0.00
6/26/2010 0.00
6/27/2010 0.19
6/28/2010 0.00
6/29/2010 0.00
6/30/2010 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2010 0.00
7/2/2010 0.16
7/3/2010 0.22
7/4/2010 0.02
7/5/2010 0.37
7/6/2010 0.00
7/7/2010 0.13
7/8/2010 0.53
7/9/2010 0.03
7/10/2010 T
7/11/2010 0.00
7/12/2010 0.00
7/13/2010 0.00
7/14/2010 0.00
7/15/2010 T
7/16/2010 0.00
7/17/2010 0.00
7/18/2010 0.00
7/19/2010 T
7/20/2010 0.02
7/21/2010 0.06
7/22/2010 T
7/23/2010 0.19
7/24/2010 0.00
7/25/2010 0.00
7/26/2010 0.00
7/27/2010 0.00
7/28/2010 0.07
7/29/2010 T
7/30/2010 0.03
7/31/2010 0.00
8/1/2010 0.00
8/2/2010 0.03
8/3/2010 0.02
8/4/2010 T
8/5/2010 0.03
8/6/2010 T
8/7/2010 0.03
8/8/2010 0.21
8/9/2010 T
8/10/2010 0.62
8/11/2010 0.00
8/12/2010 0.00
8/13/2010 T
8/14/2010 0.00
8/15/2010 0.00
8/16/2010 0.00
8/17/2010 0.36
8/18/2010 0.00
8/19/2010 0.00
8/20/2010 0.01
8/21/2010 0.00
8/22/2010 0.00
8/23/2010 0.00
8/24/2010 0.02
8/25/2010 T
8/26/2010 0.00
8/27/2010 0.00
8/28/2010 T
8/29/2010 0.01
8/30/2010 0.00
8/31/2010 0.09
9/1/2010 T
9/2/2010 0.00
9/3/2010 0.00
9/4/2010 0.00
9/5/2010 0.00
9/6/2010 0.00
9/7/2010 0.00
9/8/2010 0.00
9/9/2010 0.13
9/10/2010 0.00
9/11/2010 0.00
9/12/2010 0.00
9/13/2010 0.00
9/14/2010 0.00
9/15/2010 0.00
9/16/2010 0.00
9/17/2010 0.00
9/18/2010 0.00
9/19/2010 T
9/20/2010 0.00
9/21/2010 0.00
9/22/2010 T
9/23/2010 0.08
9/24/2010 0.00
9/25/2010 0.00
9/26/2010 0.00
9/27/2010 0.00
9/28/2010 0.00
9/29/2010 0.00
9/30/2010 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2009 7:00 AM 0.00 0.0 M M M Windy day ahead of cold front.
10/2/2009 7:00 AM 0.00 0.0 M M M
10/3/2009 7:00 AM 0.00 0.0 M M M
10/4/2009 7:00 AM 0.00 0.0 M M M
10/5/2009 7:00 AM T M M M M Late afternoons sprinkles (T) Early AM sprinkles (T)
10/6/2009 7:00 AM 0.30 M M M M A few sprinkles ~ 7:00-7:10am (T) Lt/mod rain showers ~ 9:30a-2:30p (.3)
10/7/2009 7:00 AM 0.00 0.0 M M M
10/8/2009 7:00 AM 0.02 M M M M Periods of lt rain/drizzle sometime after 4:00am, continuing at 7:00am. (.02)
10/9/2009 7:00 AM 0.08 T M 0.0 M Lt rain/drizzle ~ 7:00-8:00am (.01) Periods of drizzle/lt rain occasionally mixed w/ sleet/snow ~ 8:00am-6:00pm (.07)
10/10/2009 7:00 AM 0.17 3.0 0.18 3.0 M Lt snow began sometime after 10:00pm, slowly diminishing to flurries by 7:00am. (.17/3.0)
10/11/2009 7:00 AM 0.01 0.6 0.01 1.0 M Flurries from 7:00am ~ 12:45pm (.01/.6)
10/12/2009 7:00 AM T T M 0.5 M A few lt flurries/sleet late AM thru 1:00pm (T)
10/13/2009 7:00 AM T 0.0 M 0.0 M Lt overnight sprinkles sometime between 10:30p-3:00am (T)
10/14/2009 7:00 AM T M M M M Occasion lt am mist (T)
10/15/2009 7:00 AM 0.00 0.0 M M M Early morning fog lasting until ~ 10:00am.
10/16/2009 7:00 AM 0.00 0.0 M M M
10/17/2009 7:00 AM 0.00 0.0 M M M
10/18/2009 7:00 AM 0.00 0.0 M M M
10/19/2009 7:00 AM 0.00 0.0 M M M
10/20/2009 7:00 AM 0.00 0.0 M M M
10/21/2009 7:00 AM 0.20 T M M M
10/22/2009 7:00 AM 0.12 T M M M
10/23/2009 7:00 AM 0.00 0.0 M M M
10/24/2009 7:00 AM 0.00 0.0 M M M
10/25/2009 7:00 AM T 0.0 M M M
10/26/2009 7:00 AM 0.14 0.5 M M M
10/27/2009 7:00 AM 0.00 0.0 M M M
10/28/2009 7:00 AM 0.70 4.0 M M M
10/29/2009 7:00 AM 0.90 12.2 M M M
10/30/2009 7:00 AM 0.07 1.5 M M M
10/31/2009 7:00 AM 0.00 0.0 M M M
11/1/2009 7:00 AM 0.00 0.0 M 2.0 M
11/2/2009 7:00 AM 0.00 0.0 M T M
11/3/2009 7:00 AM 0.00 0.0 M M M
11/4/2009 7:00 AM 0.00 0.0 M M M
11/5/2009 7:00 AM 0.00 0.0 M M M
11/6/2009 7:00 AM 0.00 0.0 M M M
11/7/2009 7:00 AM 0.00 0.0 M M M
11/8/2009 7:00 AM 0.00 0.0 M M M
11/9/2009 7:00 AM 0.00 0.0 M M M
11/10/2009 7:00 AM 0.00 0.0 M M M
11/11/2009 7:00 AM 0.00 0.0 M M M
11/12/2009 7:00 AM 0.00 0.0 M M M
11/13/2009 7:00 AM 0.00 0.0 M M M
11/14/2009 7:00 AM 0.07 0.3 0.07 0.0 M Lt sprinkles ~ 1:50pm, mixing w/ sleet ~ 2:20pm, becoming lt/mod snow ~ 3:05pm. Tapered to flurries/sprinkles after 4:00p, ending ~ 4:30p (.07/.3" sn)
11/15/2009 7:00 AM 0.73 8.2 0.71 7.5 M Lt flurries began ~ 1:15pm, slowly increasing to lt snow by ~ 3:00pm (occ mixed w/ drizzle). Lt snow slowly increasing to mod snow by 7:00pm, continuing at 11:00pm (.37/4.2/.36) Overnight lt/mod snow, continuing at 7:00am (.36/4.0/.35)
11/16/2009 7:00 AM 0.02 0.8 M 6.0 M Lt snow 7:00am-10:30a (.02/.8) Occasional flurries until ~ 3:10p (T)
11/17/2009 7:00 AM 0.00 0.0 M 4.5 M
11/18/2009 7:00 AM 0.00 0.0 M 2.0 M
11/19/2009 7:00 AM 0.00 0.0 M 1.0 M
11/20/2009 7:00 AM 0.00 0.0 M 0.5 M
11/21/2009 7:00 AM 0.00 0.0 M 0.2 M
11/22/2009 7:00 AM 0.00 0.0 M T M
11/23/2009 7:00 AM 0.00 0.0 M T M
11/24/2009 7:00 AM 0.00 0.0 M T M
11/25/2009 7:00 AM 0.00 0.0 M 0.0 M
11/26/2009 7:00 AM 0.00 0.0 M 0.0 M
11/27/2009 7:00 AM 0.00 0.0 M 0.0 M
11/28/2009 7:00 AM 0.00 0.0 M 0.0 M
11/29/2009 7:00 AM T T M M M A few flurries before 2:30am.
11/30/2009 7:00 AM 0.00 0.0 M 0.0 M
12/1/2009 7:00 AM 0.00 0.0 M 0.0 M
12/2/2009 7:00 AM 0.22 4.1 0.22 4.1 M Flurries/snow pellets began ~ 10:30pm, becoming lt snow overnight, continuing at 7:00am.
12/3/2009 7:00 AM 0.03 1.1 0.03 3.0 M Lt snow 7:00-11:30am (.03/1.0/.03) Occasional flurries/lt snow thru 3:30p (T/T) Brief overnight lt snow (T/.1)
12/4/2009 7:00 AM T T M 2.5 M A few flurries around noon.
12/5/2009 7:00 AM 0.00 0.0 M 2.0 M
12/6/2009 7:00 AM 0.12 3.0 0.12 4.5 M Lt snow began ~ 10:00pm, continuing at 7:00am
12/7/2009 7:00 AM 0.05 2.0 0.05 5.0 M Lt snow at 7:00am w/ occsional flurries and snow showers (11:30a .02/.5) Lt snow began late afternoon, ending overnight (.03/1.5/.03)
12/8/2009 7:00 AM 0.04 0.6 0.04 5.0 M A few flurries ~ 8:15am. Lt snow after 3:00am, w flurries at 7:00am. (.04/.6)
12/9/2009 7:00 AM 0.03 0.6 0.03 5.0 M Flurries w occasion lt snow showers 7:00am-12:30pm (.02/.4) Lt snow shower ~ 2:30-4:00pm (.01/.2)
12/10/2009 7:00 AM 0.00 0.0 M 4.0 M Downsloping gusty winds warmed temps overnight from 5º to 22º. Some drifting occurred that may impact "total snow depth" value.
12/11/2009 7:00 AM 0.00 0.0 M 4.0 M
12/12/2009 7:00 AM 0.00 0.0 M 3.5 M
12/13/2009 7:00 AM 0.00 0.0 M 3.0 M
12/14/2009 7:00 AM T 0.0 M 2.0 M Brief wind-blown sprinkles/lt shower ~ 4:05-4:15pm (T)
12/15/2009 7:00 AM 0.00 0.0 M 1.5 M
12/16/2009 7:00 AM 0.00 0.0 M 1.0 M
12/17/2009 7:00 AM 0.00 0.0 M 0.5 M
12/18/2009 7:00 AM 0.00 0.0 M T M
12/19/2009 7:00 AM 0.00 0.0 M T M
12/20/2009 7:00 AM 0.00 0.0 M T M
12/21/2009 7:00 AM 0.00 0.0 M T M
12/22/2009 7:00 AM 0.00 0.0 M T M
12/23/2009 7:00 AM 0.23 2.3 0.23 M M
12/24/2009 7:00 AM 0.31 7.1 0.31 M M
12/25/2009 7:00 AM 0.00 0.0 M M M
12/26/2009 7:00 AM T 0.5 M M M
12/27/2009 7:00 AM 0.02 0.5 M M M
12/28/2009 7:00 AM 0.00 0.0 M 5.0 M
12/29/2009 7:00 AM 0.00 0.0 M 4.5 M
12/30/2009 7:00 AM 0.00 0.0 M 4.0 M
12/31/2009 7:00 AM 0.00 0.0 M 4.0 M
1/1/2010 7:00 AM 0.00 0.0 M 4.0 M
1/2/2010 7:00 AM 0.00 0.0 M 4.0 M
1/3/2010 7:00 AM 0.00 0.0 M 3.5 M
1/4/2010 7:00 AM 0.02 0.1 M 3.0 M Periods of Lt snow/flurries ~ 1:30-4:30pm (.02/.1), w snow mosly melting.
1/5/2010 7:00 AM 0.00 0.0 M 3.0 M
1/6/2010 7:00 AM 0.00 0.0 M 2.5 M
1/7/2010 7:00 AM 0.15 3.8 0.15 6.0 M Flurries/snow pellets began ~ 8:20am. Lt snow/flurries ~ 9:30am-1:00pm (.03/.5) Lt snow ~ 1:00pm-8:30pm (.11/3) Lt snow/flurries ending ~ 9:30pm (.01/.3)
1/8/2010 7:00 AM 0.00 0.0 M 5.0 M
1/9/2010 7:00 AM 0.00 0.0 M 4.5 M
1/10/2010 7:00 AM 0.00 0.0 M 4.0 M
1/11/2010 7:00 AM 0.00 0.0 M 3.5 M
1/12/2010 7:00 AM 0.00 0.0 M 3.0 M
1/13/2010 7:00 AM 0.00 0.0 M 3.0 M
1/14/2010 7:00 AM 0.00 0.0 M 2.5 M
1/15/2010 7:00 AM 0.00 0.0 M 2.0 M
1/16/2010 7:00 AM 0.00 0.0 M 1.5 M
1/17/2010 7:00 AM 0.00 0.0 M 1.5 M
1/18/2010 7:00 AM T 0.0 M 0.5 M A few sprinkles ~ 2:00pm.
1/19/2010 7:00 AM 0.00 0.0 M 0.5 M
1/20/2010 7:00 AM 0.00 0.0 M T M
1/21/2010 7:00 AM 0.00 0.0 M T M
1/22/2010 7:00 AM 0.00 0.0 M T M
1/23/2010 7:00 AM 0.00 0.0 M T M
1/24/2010 7:00 AM 0.00 0.0 M T M
1/25/2010 7:00 AM 0.00 0.0 M T M
1/26/2010 7:00 AM 0.00 0.0 M T M
1/27/2010 7:00 AM 0.00 0.0 M T M
1/28/2010 7:00 AM 0.10 0.9 0.10 0.5 M Lt snow ~ 6:05-9:45pm.
1/29/2010 7:00 AM T 0.1 T 0.5 M Periods of very lt snow/pellets ~ 8:15-11:30am (T/T) Lt snow mist sometime after 5:30am, continuing at 7:00am (T/.1)
1/30/2010 7:00 AM T T T T M Lt snow mist 7:00-8:15am (T/T)
1/31/2010 7:00 AM 0.00 0.0 M T M
2/1/2010 7:00 AM 0.00 0.0 M M M
2/2/2010 7:00 AM 0.00 0.0 M 0.0 M
2/3/2010 7:00 AM 0.00 0.0 M 0.0 M
2/4/2010 7:00 AM 0.02 0.4 0.02 0.4 M Period of lt snow sometime between 5:00-7:00am (.02/.4)
2/5/2010 7:00 AM T 0.0 M 0.0 M A few sprinkles shortly after noon (T)
2/6/2010 7:00 AM 0.00 0.0 M 0.0 M
2/7/2010 7:00 AM 0.03 0.5 0.03 0.5 M Lt smow began sometime after 5:00am, lt/mod snow continuing at 7:00am. (.03/.5)
2/8/2010 7:00 AM 0.20 2.4 0.20 1.5 M Lt/mod snow 7:00-8:45am, becoming lt snow/flurries thru 11:30am (.1/1.1) Lt snow/flurries 11:30am-9:45pm (.06/.6) Flurries/lt snow ~ 1:30-7:00am(.04/.7)
2/9/2010 7:00 AM 0.05 3.4 0.05 4.2 M Lt snow slowly diminishing to flurries 7:00a-3:30pm (.05/2.8) Flurries 3:30-9:30pm (T/.6)
2/10/2010 7:00 AM 0.00 0.0 M 2.5 M
2/11/2010 7:00 AM 0.00 0.0 M 1.5 M
2/12/2010 7:00 AM 0.00 0.0 M M M
2/13/2010 7:00 AM 0.00 0.0 M M M
2/14/2010 7:00 AM 0.13 1.8 0.13 M M
2/15/2010 7:00 AM T T M M M
2/16/2010 7:00 AM 0.00 0.0 M T M
2/17/2010 7:00 AM 0.00 0.0 M 0.0 M
2/18/2010 7:00 AM 0.00 0.0 M 0.0 M
2/19/2010 7:00 AM 0.17 2.2 0.17 2.0 M Sprinkles/flurries mix ~ 1:30p becoming lt snow ~ 1:40p, increasing to mod snow w/ accumulation ~ 3:15pm. Diminished to flurries by 4:10pm (.02/.4) Periods of Lt snow / flurries continue until around midnight. (.15/1.8)
2/20/2010 7:00 AM 0.05 0.5 0.05 2.0 M Flurries ~ 7:15-9:15am (T/T) Lt snow/flurries ~ 2:15-9:00pm (.05/.5)
2/21/2010 7:00 AM 0.21 3.7 0.21 5.5 M Lt flurries 7:15-11:00am (T/T) Lt flurries ~ 1:00pm, becoming lt snow ~ 3:15pm, diminishing to lt flurries at 7:00am. (.21/3.7)
2/22/2010 7:00 AM 0.11 2.5 0.11 6.0 M Lt flurries w/ occasional lt snow 7:00am-4:00pm (.04/.8) Lt flurries w brief lt snow 4:00pm thru 4:30am (.07/1.7)
2/23/2010 7:00 AM 0.00 0.0 M 4.0 M
2/24/2010 7:00 AM 0.00 0.0 M 2.5 M
2/25/2010 7:00 AM 0.00 0.0 M 2.5 M
2/26/2010 7:00 AM 0.02 0.2 0.02 2.0 M Lt snow shower ~ 3-3:20pm (T/T) Lt flurries w occasional snow showers ~ 3:45-6:15pm (.02/.2)
2/27/2010 7:00 AM 0.00 0.0 M 0.5 M
2/28/2010 7:00 AM 0.00 0.0 M T M
3/1/2010 7:00 AM 0.06 0.8 0.06 0.5 0.05 Periods of snow flurries began ~ 2:30p, becoming lt snow ~ 3:25-10:30pm (.02/.3 at 4:45pm) ).04/.5
3/2/2010 7:00 AM 0.00 0.0 M 0.0 M
3/3/2010 7:00 AM 0.00 0.0 M 0.0 M
3/4/2010 7:00 AM 0.00 0.0 M 0.0 M
3/5/2010 7:00 AM 0.00 0.0 M 0.0 M
3/6/2010 7:00 AM 0.00 0.0 M 0.0 M
3/7/2010 7:00 AM 0.00 0.0 M 0.0 M
3/8/2010 7:00 AM T M M 0.0 M Brief overnight rain shower. (T)
3/9/2010 7:00 AM T M M 0.0 M A few sprinkles ~ 7:40pm
3/10/2010 7:00 AM T 0.0 M 0.0 M Lt overnight shower. (T)
3/11/2010 7:00 AM 0.11 0.1 0.11 T M Lt snow occ mixed w rain 2:45-5:00pm (.06/T) Lt snow mixed w rain early 5:00pm-late evening. (.05/.1)
3/12/2010 7:00 AM 0.00 0.0 M 0.0 M
3/13/2010 7:00 AM 0.00 0.0 M 0.0 M
3/14/2010 7:00 AM 0.00 0.0 M 0.0 M
3/15/2010 7:00 AM 0.28 0.3 0.28 0.3 0.02 Lt rain ~ 12:30-2:15pm (.06), changing to lt snow occ mixed w rain, going back to rain occ mixed w snow ~ 3:15-9:45pm, changing to lt snow (.21/.1 @ 10:00pm). Lt snow thru approx 12AM. (.01/.2)
3/16/2010 7:00 AM 0.00 0.0 M 0.0 M
3/17/2010 7:00 AM 0.00 0.0 M 0.0 M
3/18/2010 7:00 AM 0.00 0.0 M 0.0 M
3/19/2010 7:00 AM 0.28 2.0 0.28 2.0 M Lt snow began sometime after 2:00am, becoming mod snow by 7:00am (.28/2)
3/20/2010 7:00 AM 0.53 8.8 0.53 9.0 M Mod w occ hvy snow 7:00-11:00a (.31/4.8) Mod/lt snow w occ hvy snow showers 11:00a-3:00p, diminishing to flurries (.16/3) Flurries/lt snow 3:00-7:00pm (.06/1)
3/21/2010 7:00 AM 0.00 0.0 M 3.0 M
3/22/2010 7:00 AM 0.00 0.0 M 0.5 0.10 The Total Snow amount was taken near regular snow measuring station. The total Liquid Equiv was .2". Since there are many areas in the neighborhood with little or no snow, I averaged this to about 50%, or .1".
3/23/2010 7:00 AM 0.00 0.0 M 0.0 M
3/24/2010 7:00 AM 1.38 10.5 1.25 10.0 M Sprinkles began ~ 12:30p, becoming lt rain ~ 1:00-3:10p (.13), changing to snow/rain mix. Mod/lt wet snow ~ 3:55-6:30pm (.68/4) Mod/lt snow 6:30p-12:00am (.38/4) Lt/mod snow ~ 12:00-2:30am, diminishing to lt snow 2:30-7:00am (.19/2.5) THIS IS THE WETTEST SNOW STORM I HAVE EVER MEASURED, ALMOST .12" LIQUID PER 1" SNOW!
3/25/2010 7:00 AM 0.01 0.2 0.01 5.0 M Lt snow/flurries at 7:00a, ending ~ 8:45am (.01/.2)
3/26/2010 7:00 AM 0.00 0.0 M 3.0 M
3/27/2010 7:00 AM 0.02 T T 0.0 M Lt rain ~ 3:55-4:25pm (.01) A brief burst of lt snow ~ 4:25p, followed by lt rain until ~ 6:30pm (.01/T)
3/28/2010 7:00 AM 0.00 0.0 M 0.0 M
3/29/2010 7:00 AM 0.00 0.0 M 0.0 M
3/30/2010 7:00 AM 0.00 0.0 M M M
3/31/2010 7:00 AM 0.00 0.0 M 0.0 M
4/1/2010 7:00 AM T 0.0 M M M Brief hail.
4/2/2010 7:00 AM T T T 0.0 M
4/3/2010 7:00 AM 0.00 0.0 M 0.0 M
4/4/2010 7:00 AM 0.00 0.0 M M M
4/5/2010 7:00 AM T T T M M Brief lt snow shower ~ 8:25-8:35am (T/T)
4/6/2010 7:00 AM 0.06 0.0 M M M Overnight sprinkles and brief shower w/ hail ~ 4:17am
4/7/2010 7:00 AM 0.10 1.8 1.80 1.8 M Lt snow started sometime after 3:00am, continuing at 7:00am (.1/1.8)
4/8/2010 7:00 AM 0.01 0.1 0.01 0.0 M Lt snow/flurries 7:00-8:25am (.01/.1) A few fluries ~ 11:22am (T/T)
4/9/2010 7:00 AM 0.00 0.0 M 0.0 M
4/10/2010 7:00 AM 0.00 0.0 M 0.0 M
4/11/2010 7:00 AM 0.00 0.0 M 0.0 M
4/12/2010 7:00 AM 0.00 0.0 M 0.0 M
4/13/2010 7:00 AM 0.00 0.0 M M M
4/14/2010 7:00 AM 0.00 0.0 M M M High winds and gusts (~50mph) from ~9:00am-4:30pm.
4/15/2010 7:00 AM 0.00 0.0 M M M
4/16/2010 7:00 AM 0.00 0.0 M M M
4/17/2010 7:00 AM 0.00 0.0 M M M
4/18/2010 7:00 AM 0.01 0.0 M M M Lt rain ~ 12:05p-3:15p (.01+)
4/19/2010 7:00 AM 0.00 0.0 M M M
4/20/2010 7:00 AM 0.00 0.0 M M M
4/21/2010 7:00 AM T M M M M A few sprinkles ~ 12:50pm and ~ 2:20pm.
4/22/2010 7:00 AM 0.74 M M M M Lt rain/sprinkles w thunder ~ 4:30-5:45p (.01) Lt/mod rain mid-evening (.16 @ 10:30pm), ending sometime before 3:00am (.57)
4/23/2010 7:00 AM 0.63 0.0 M M M Lt rain w occasional mod showers ~ 8:25-10:15am (.05) Sprinkles w thunder ~ 2:30-2:40pm (T) Mod rain ~ 7:30-10:10pm (.38) Lt rain began sometime after 3:45am, continuing at 7:00am (.2)
4/24/2010 7:00 AM 0.96 0.9 0.23 0.0 M Lt rain 7:00-9:15am (.02) Lt/mod rain ~ 10:05am, changing to snow ~ 12:35pm (.71/.2) Mod snow 12:35-1:00 (.17/.7) Changing back to lt rain until 1:50pm (.01) Lt rain ~ 8:00pm-12:15am (.03) Overnight periods of sprinkles/lt rain from 12:15am (.02)
4/25/2010 7:00 AM T 0.0 M M M Occasional sprinkles ~ 7:30-10:30am (T)
4/26/2010 7:00 AM 0.28 1.6 0.12 1.0 0.10 A few sprinkles ~ 1:20-1:35pm (T) Occasional sprinklels ~ 3:05-5:45pm (T), becoming lt rain 5:45-9:50pm (.16), changing to lt snow ~9:50pm-12:30am (.03/.4) Lt snow/flurries 12:30a-sometime before 4:00am (.09/1.2)
4/27/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 12:30pm (T)
4/28/2010 7:00 AM 0.00 0.0 M M M
4/29/2010 7:00 AM 0.23 0.5 0.10 T M Lt rain sometime after midnight becoming mixed w snow ~ 5:00am (.13/T), becoming mostly wet snow ~ 6:25-7:00am (.1/.5 snow and slush)
4/30/2010 7:00 AM 0.10 0.9 0.10 0.0 M Lt wet snow 7:00-9:00am (.1/.9)
5/1/2010 7:00 AM 0.01 T M 0.0 M Lt flurry/sleet/sprinkle mix ~ 1:05-1:45pm, w imbedded 3 min sleet shower. (.01)
5/2/2010 7:00 AM 0.00 0.0 M M M
5/3/2010 7:00 AM T 0.0 M M M A few sprinkles ~12:25pm (T)
5/4/2010 7:00 AM 0.00 0.0 M M M Windy w/ high gusts after midnight.
5/5/2010 7:00 AM 0.00 0.0 M M M Winds and high gusts to 70mph from 7:00am-6:30pm. Broken limbs, felled trees, and damaged flowers.
5/6/2010 7:00 AM 0.00 0.0 M M M
5/7/2010 7:00 AM 0.18 0.6 0.06 0.5 M A few sprinkles ~ 12:17pm. (T) Lt rain/sprinkles ~ 1:40-2:15p (.025) Periods of sprinkles/lt rain ~ 2:40p (.005), becoming lt rain shower ~ 4:20-6:00p (.07) Occasional sprinkles lt/rain to ~ 11:15pm (.02), changing to lt snow ending sometime after midnight (.06/.6)
5/8/2010 7:00 AM 0.00 0.0 M 0.0 M
5/9/2010 7:00 AM 0.00 0.0 M M M
5/10/2010 7:00 AM 0.00 0.0 M M M
5/11/2010 7:00 AM 0.00 0.0 M M M
5/12/2010 7:00 AM 1.19 3.5 0.77 3.5 M Frequent Sprinkles ~ 12:45-3:50pm (T), becoming lt rain ~ 3:50pm (.01) and more steady lt rain ~ 4:55-8:05pm (.41/T) mixing with sleet/snow until 10:30pm (.09/.2), changing to snow ~ 10;30pm-after 3:00am (.68/3.3) Broken tree limbs from weight of snow.
5/13/2010 7:00 AM 0.08 T M T M Periods of drizzle/snow pellets ~ 8:45a-12:30p (T/T) Lt rain occasionally mixed w snow 5:45p-9:30p (.08/T) Lt rain ~ 9:30p-before midnight (T)
5/14/2010 7:00 AM 0.15 0.0 M 0.0 M Lt rain ~ 6:15pm until around midnight. (.15)
5/15/2010 7:00 AM 0.28 0.0 M M M A few sprinkles ~ 1:30p (T) Sprinkles ~ 4:45p, becoming lt rain ~ 5:20-9:20pm (.2) Sprinkles/lt rain ~ 10:30p-before 1:30am (.08)
5/16/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 11:45am (T)
5/17/2010 7:00 AM 0.00 0.0 M M M
5/18/2010 7:00 AM 0.00 0.0 M M M
5/19/2010 7:00 AM 0.34 0.0 M M M Brief sprinkles/lt rain ~ 11:35am (T) Brief lt shower w thunder ~ 5:45p (T) TS w hail(6:58-7:05p, rice/pea/rice) and mod/heavy rain ~ 6:58-7:15p (.33) Brief lt shower after midnight (.01)
5/20/2010 7:00 AM T 0.0 M M M Brief lt shower ~ 12:02p (T) A few sprinkles ~ 12:50p (T)
5/21/2010 7:00 AM 0.00 0.0 M M M
5/22/2010 7:00 AM 0.00 0.0 M M M
5/23/2010 7:00 AM 0.00 0.0 M M M
5/24/2010 7:00 AM 0.00 0.0 M M M
5/25/2010 7:00 AM 0.00 0.0 M M M Windy w very high gusts > 50mph. Broken tree limbs and branches, blowing debris and dirt.
5/26/2010 7:00 AM 0.00 0.0 M M M
5/27/2010 7:00 AM T 0.0 M M M Brief lt shower ~ 6:55-7:05pm (T)
5/28/2010 7:00 AM 0.00 0.0 M M M
5/29/2010 7:00 AM 0.00 0.0 M M M
5/30/2010 7:00 AM 0.54 0.0 M M M Lt/mod rain ~ 5:59-6:10pm (w hail (rice/pea ~ 650/sqft) ~ 6:01-6:13p and 6:20-6:22pm (rice/pea), mod rain 6:10-7:20pm, becoming lt rain/sprinkles thru 8:10pm (.51) Lt rain/sprinkles 8:10-9:15pm (.03)
5/31/2010 7:00 AM 0.00 0.0 M M M
6/1/2010 7:00 AM 0.00 0.0 M M M
6/2/2010 7:00 AM 0.00 0.0 M M M
6/3/2010 7:00 AM 0.00 0.0 M M M
6/4/2010 7:00 AM 0.00 0.0 M M M
6/5/2010 7:00 AM 0.00 0.0 M M M
6/6/2010 7:00 AM 0.00 0.0 M M M
6/7/2010 7:00 AM 0.00 0.0 M M M
6/8/2010 7:00 AM 0.00 0.0 M M M
6/9/2010 7:00 AM 0.06 0.0 M M M A shower ~ 4:45-5:00pm (.05) A couple of brief periods of sprinkles/lt rain early to mid-evening (.01) NOTE: Boulder and South Boulder creeks running at very high (abnormal) levels. Took out bridge on Boulder Creek leading to the Red Lion Inn in Boulder Canyon. Bridge created a temporary dam that threatened a large surge when it broke. Fortunately, it was broken up before it released, creating a brief, minor surge.
6/10/2010 7:00 AM 0.00 0.0 M M M
6/11/2010 7:00 AM 0.05 0.0 M M M TS w lt rain/sprinkles ~ 5:56-6:20pm (.05)
6/12/2010 7:00 AM 1.33 0.0 M M M Sprinkles w lt/mod rain shower ~ 2:10-3:15pm (.06) Sprinkles w lt rain shower and thunder 3:15-4:45pm (.04) Sprinkles w lt/mod rain and thunder 4:45-5:25p (.07) Periods of lt/mod rain 5:55-10:00pm (.39) Lt/mod rain 10:00p-7:00am (.77)
6/13/2010 7:00 AM 0.61 0.0 M M M Lt rain w periods of mod rain/sprinkles 7:00-Noon (.18), continuing Noon-1:15pm (.01) Frequent Lt rain/sprinkles 2:20-4:15p (.03) Lt rain ~ 8:00-10:00p (.08) Lt rain 10:00p-7:00am (.31)
6/14/2010 7:00 AM 0.24 0.0 M M M Lt rain 7:00-8:15a (.09) Lt rain 9:45-11:00a (.09) Lt rain showers ~ 6:40p and late evening (.06)
6/15/2010 7:00 AM 0.10 0.0 M M M Sprinkles/lt rain ~ 8:45-10:20am (.03) TSh ~ 3:20-3:40pm (.07)
6/16/2010 7:00 AM 0.00 0.0 M M M
6/17/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 1:40-2:00pm.
6/18/2010 7:00 AM 0.00 0.0 M M M
6/19/2010 7:00 AM 0.00 0.0 M M M
6/20/2010 7:00 AM 0.00 0.0 M M M
6/21/2010 7:00 AM 0.00 0.0 M M M
6/22/2010 7:00 AM 0.06 0.0 M M M Lt rain shower w thunder NA-3:15pm (.06) NOTE: Experienced hail (pea-marble) and lt/mod rain on way home from US36 & McCaslin to Cherryvale and US 36, Louisville, Boulder County CO.
6/23/2010 7:00 AM 0.00 0.0 M M M
6/24/2010 7:00 AM 0.00 0.0 M M M
6/25/2010 7:00 AM 0.00 0.0 M M M
6/26/2010 7:00 AM 0.00 0.0 M M M
6/27/2010 7:00 AM 0.19 0.0 M M M A few occasional periods of sprinkles ~ 1:45-3:05pm (T) Mod TS 3:50-4:05pm (.17, minor st flooding) Occasional sprinkles/lt rain w thunder 4:30-5:30 (.02)
6/28/2010 7:00 AM 0.00 0.0 M M M
6/29/2010 7:00 AM 0.00 0.0 M M M
6/30/2010 7:00 AM 0.00 0.0 M M M
7/1/2010 7:00 AM 0.00 0.0 M M M
7/2/2010 7:00 AM 0.16 0.0 M M M
7/3/2010 7:00 AM 0.22 0.0 M M M
7/4/2010 7:00 AM 0.02 0.0 M M M
7/5/2010 7:00 AM 0.37 0.0 M M M
7/6/2010 7:00 AM 0.00 0.0 M M M
7/7/2010 7:00 AM 0.13 0.0 M M M
7/8/2010 7:00 AM 0.53 0.0 M M M
7/9/2010 7:00 AM 0.03 0.0 M M M
7/10/2010 7:00 AM T 0.0 M M M
7/11/2010 7:00 AM 0.00 0.0 M M M
7/12/2010 7:00 AM 0.00 0.0 M M M
7/13/2010 7:00 AM 0.00 0.0 M M M
7/14/2010 7:00 AM 0.00 0.0 M M M
7/15/2010 7:00 AM T 0.0 M M M 'Dry' TS w virga and a few sprinkles ~ 6:15-6:35pm (T)
7/16/2010 7:00 AM 0.00 0.0 M M M
7/17/2010 7:00 AM 0.00 0.0 M M M
7/18/2010 7:00 AM 0.00 0.0 M M M
7/19/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 1:40-1:48pm (T) Lt rain w thunder ~ 3:40-4:00pm(T)
7/20/2010 7:00 AM 0.02 0.0 M M M Brief lt TS ~ 4:10-4:20pm (.02). Sprinkles ~ 4:25-4:45pm(T).
7/21/2010 7:00 AM 0.06 0.0 M M M A few sprinkles ~ 1:30p (T) A lot of lightning/thunder ~ 3:10-4:10pm w sprinkles/lt rain(4:00-4:09pm) 3:45-4:20pm (.05) Brief lt shower ~ 5:50-6:10pm (.01)
7/22/2010 7:00 AM T M M M M Lt sprinkles w thunder ~ 3:10-3:30pm (T)
7/23/2010 7:00 AM 0.19 0.0 M M M TS w Sprinkles and lt/mod rain (~6:10-6:25pm) ~ 6:05-6:40pm (.18) Brief lt shower sometime after dark and before 2:30am (.01)
7/24/2010 7:00 AM 0.00 0.0 M M M
7/25/2010 7:00 AM 0.00 0.0 M M M
7/26/2010 7:00 AM 0.00 0.0 M M M
7/27/2010 7:00 AM 0.00 0.0 M M M
7/28/2010 7:00 AM 0.07 0.0 M M M Lt sprinkles ~ 1:45p (T) Sprinkles/lt rain(~3:22-4:25p) ~ 3:05-4:35pm (.07)
7/29/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 11:00am (T) Occasional periods of sprinkles ~ 3:00-6:15pm (T).
7/30/2010 7:00 AM 0.03 0.0 M M M Sprinkles/lt rain ~ 3:40-4:50pm (.03) Occasional sprinkles ~ 5:15-6:45pm (T) A few sprinkles after 7:00pm (T)
7/31/2010 7:00 AM 0.00 0.0 M M M
8/1/2010 7:00 AM 0.00 0.0 M M M
8/2/2010 7:00 AM 0.03 0.0 M M M Lt rain/sprinkles ~ 4:4:30p (.01) Sprinkles w brief lt rain(~5 min) ~ 4:35-6:45p (.01) Lt Rain after 8:00pm (.01)
8/3/2010 7:00 AM 0.02 0.0 M M M Lt rain/sprinkles ~ 4:40-5:15pm (.02)
8/4/2010 7:00 AM T 0.0 M M M Lt rain/sprinkles ~ 3:43p to after 4:05pm (T)
8/5/2010 7:00 AM 0.03 0.0 M M M Sprinkles ~ 3:40-4:45p, with lt TSh ~ 3:51-4:10pm (.03)
8/6/2010 7:00 AM T 0.0 M M M Brief lt rain shower PM. (T)
8/7/2010 7:00 AM 0.03 0.0 M M M Midday rain shower (.03)
8/8/2010 7:00 AM 0.21 0.0 M M M Overnight rain shower. (.21)
8/9/2010 7:00 AM T 0.0 M M M Brief sprinkles right before 7:00am (T)
8/10/2010 7:00 AM 0.62 0.0 M M M Occasional AM sprinkles 7:00-9:10am (T) TS began w/ sprinkles ~ 3:22p, increasing to mod rain ~ 3:26-3:30p (.04 est), becoming hvy/mod rain 3:30-3:42pm wind gusts to 30-40 mph. (.52) Storm continues w/ mod / lt rain and lesser winds 3:42-5:40p. (.05) Brief lt shower after 6:00pm (.01)
8/11/2010 7:00 AM 0.00 0.0 M M M
8/12/2010 7:00 AM 0.00 0.0 M M M
8/13/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 12:10pm
8/14/2010 7:00 AM 0.00 0.0 M M M
8/15/2010 7:00 AM 0.00 0.0 M M M
8/16/2010 7:00 AM 0.00 0.0 M M M
8/17/2010 7:00 AM 0.36 0.0 M M M Lt rain ~ 5:35p w/ brief lt hail ~ 5:42p, becoming mod to hvy rain 5:45-5:49p w hail @ 5:46 (for 2 min), becoming lt rain/sprinkles 5:49-6:01pm (.36)
8/18/2010 7:00 AM 0.00 0.0 M M M
8/19/2010 7:00 AM 0.00 0.0 M M M
8/20/2010 7:00 AM 0.01 0.0 M M M A few sprinkles ~ 6:10pm (T) and a brief lt shower later in the evening (.01)
8/21/2010 7:00 AM 0.00 0.0 M M M
8/22/2010 7:00 AM 0.00 0.0 M M M
8/23/2010 7:00 AM 0.00 0.0 M M M
8/24/2010 7:00 AM 0.02 0.0 M M M A few sprinkles w thunder ~ 2:45-2:50pm (T). Lt rain shower ~ 3:48-4:08pm (.01) Lt overnight shower (.01)
8/25/2010 7:00 AM T 0.0 M M M Mist/lt drizzle ~ 7:55-8:15am (T)
8/26/2010 7:00 AM 0.00 0.0 M M M
8/27/2010 7:00 AM 0.00 0.0 M M M
8/28/2010 7:00 AM T 0.0 M M M Sprinkle/lt rain ~ 2:38-2:55p (T) A few sprinkles ~ 3:30-3:35p (T)
8/29/2010 7:00 AM 0.01 0.0 M M M A few sprinkles ~ 4:25pm (T) A brief evening rain shower (.01)
8/30/2010 7:00 AM 0.00 0.0 M M M
8/31/2010 7:00 AM 0.09 0.0 M M M Sprinkles/lt rain with short period of mod rain ~12:05-12:45pm (.07) Overnight shower (.02)
9/1/2010 7:00 AM T 0.0 M M M A few sprinkles ~ 1:30p (T) (NOTE: This was from an almost cloudless blue sky!)
9/2/2010 7:00 AM 0.00 0.0 M M M
9/3/2010 7:00 AM 0.00 0.0 M M M
9/4/2010 7:00 AM 0.00 0.0 M M M
9/5/2010 7:00 AM 0.00 0.0 M M M
9/6/2010 7:00 AM 0.00 0.0 M M M
9/7/2010 7:00 AM 0.00 0.0 M M M Little or no precipitation since at least Aug 16 set the stage for the Four Mile Canyon fire, which was spread by 35-50+ mph winds causing heavy smoke and light ash to fall across northern and central Boulder county on 9/6. Air was acrid and made breathing uncomfortable to difficult. The air this morning in Boulder is very hazy and smoky. Luckily, the winds have abated. Overnight low temps in the upper 30's-low 40's and light winds should help the fire 'settle', and changing wind direction could throw the fire back on itself, helping to reduce the danger.
9/8/2010 7:00 AM 0.00 0.0 M M M Four Mile fire was bad again, especially midday. Lt Winds out of the south pushed the fire to new areas to the north, more than doubling the size to over 7000 acres. At 7:00a this morning, visibility in Boulder is much better and the plume of smoke to the NW is mostly a haze, not a towering cloud. Over 90 buildings have been destroyed.
9/9/2010 7:00 AM 0.13 0.0 M M M A few sprinkles ~ 3:05p (T) and again at 3:35pm (T). Lt/mod rain ~ 4:50-5:45pm (.13) Beautiful double rainbow at end of shower.
9/10/2010 7:00 AM 0.00 0.0 M M M
9/11/2010 7:00 AM 0.00 0.0 M M M
9/12/2010 7:00 AM 0.00 0.0 M M M
9/13/2010 7:00 AM 0.00 0.0 M M M
9/14/2010 7:00 AM 0.00 0.0 M M M
9/15/2010 7:00 AM 0.00 0.0 M M M
9/16/2010 7:00 AM 0.00 0.0 M M M
9/17/2010 7:00 AM 0.00 0.0 M M M
9/18/2010 7:00 AM 0.00 0.0 M M M
9/19/2010 7:00 AM T 0.0 M M M Occ periods of very lt drizzle ~ 8:30-12:45am (T)
9/20/2010 7:00 AM 0.00 0.0 M M M
9/21/2010 7:00 AM 0.00 0.0 M M M
9/22/2010 7:00 AM T 0.0 M M M Some sprinkles w Lightning/Thunder ~ 10:37pm (T)
9/23/2010 7:00 AM 0.08 0.0 M M M Sprinkles/lt rain ~ 1:25-5:10pm (.08)
9/24/2010 7:00 AM 0.00 0.0 M M M
9/25/2010 7:00 AM 0.00 0.0 M M M
9/26/2010 7:00 AM 0.00 0.0 M M M
9/27/2010 7:00 AM 0.00 0.0 M M M
9/28/2010 7:00 AM 0.00 0.0 M M M
9/29/2010 7:00 AM 0.00 0.0 M M M Boulder record high 90º
9/30/2010 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
1/1/0001 12:00 AM No notes from substituting observer. NA NA NA False
4/6/2010 4:17 AM No pad .. eye observation. Depth was basically the width of the hail stones (rice). Rice Rice Rice Hard|White Ice 1 1min no damage Continuous True Before rain Same time as smaller hail 10-20 .1
5/18/2010 6:58 PM Started as rice, increased in size to pea, then back to rice. Approx 170 per sq foot. 1/4" Pea Size 1/4" Pea Size Rice Mixed 7 1min minor leaf damage Continuous False Same time as rain After smaller hail 10-20
6/21/2010 3:00 PM Experienced hail (pea-marble) and lt/mod rain on way home from US36 & McCaslin to Cherryvale and US 36. This was a lt/mod hail event with max size at least 1/2 inch in diameter. Storm appeared to be moving from SW to NE across Louisville CO toward Lafayette CO. Did not see if rain or hail started first, but hail ended before rain. 1/2" Grape NA 1/4" Pea Size Mixed 12 1min Continuous False Same time as smaller hail vertical
8/16/2010 5:42 PM Lt hail (~ 12-15/sq ft). came in two periods: 5:42 (~1 min) mostly rice 5:46 (~2 min) mixed rice/pea 1/4" Pea Size Rice Rice White Ice no damage False After rain Same time as smaller hail 10-20