Station Overview Station Location
Station Number CO-BO-120 Latitude 40.0132
Station Name Boulder 3.0 E Longitude -105.2064
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 1.23 2.12 31 0.46 19 1.66 12 4 5 2 0.0 0 2
Nov 09 0.91 0.66 29 0.07 17 0.59 12 6 1 0 0.0 0 3
Dec 09 0.68 0.83 31 0.72 17 0.11 14 6 6 1 12.5 6 10
Jan 10 0.55 0.20 31 0.20 20 0.00 11 5 3 1 4.0 4 10
Feb 10 0.56 0.81 28 0.24 18 0.57 10 3 5 0 3.4 4 4
March 10 1.75 2.08 31 2.02 23 0.06 8 4 6 1 17.1 2 4
April 10 2.12 3.40 30 0.60 13 2.80 17 4 1 1 1.0 1 0
May 10 2.46 1.88 31 1.88 22 0.00 9 2 8 5 1.0 1 0
June 10 1.95 2.89 29 2.30 14 0.59 15 2 5 2 0.0 0 0
July 10 1.67 1.25 31 0.68 12 0.57 19 5 5 1 0.0 0 0
Aug 10 1.57 1.25 31 1.01 17 0.24 14 3 9 0 0.0 0 0
Sept 10 1.51 0.43 30 0.12 14 0.31 16 5 2 0 0.0 0 0
Water Year Totals: 16.96" 17.80" 363 days 10.30" 206 7.50" 157 days 49 56 days 14 days 39.0" 18 days 33 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 **
10/2/2009 **
10/3/2009 **
10/4/2009 **
10/5/2009 **
10/6/2009 0.33
10/7/2009 0.00
10/8/2009 0.06
10/9/2009 0.04
10/10/2009 **
10/11/2009 0.14
10/12/2009 0.00
10/13/2009 0.00
10/14/2009 0.00
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 0.31
10/22/2009 T
10/23/2009 T
10/24/2009 **
10/25/2009 0.09
10/26/2009 0.04
10/27/2009 0.00
10/28/2009 **
10/29/2009 1.10
10/30/2009 0.01
10/31/2009 0.00
11/1/2009 **
11/2/2009 0.00
11/3/2009
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 **
11/16/2009 0.59
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.00
11/20/2009 0.00
11/21/2009 **
11/22/2009 0.00
11/23/2009 **
11/24/2009 0.00
11/25/2009 0.00
11/26/2009 **
11/27/2009 0.00
11/28/2009 0.00
11/29/2009 **
11/30/2009 0.00
12/1/2009 0.00
12/2/2009 0.17
12/3/2009 0.01
12/4/2009 0.00
12/5/2009 0.00
12/6/2009 0.10
12/7/2009 0.06
12/8/2009 0.06
12/9/2009 T
12/10/2009 0.00
12/11/2009 **
12/12/2009 0.00
12/13/2009 **
12/14/2009 0.00
12/15/2009 0.00
12/16/2009 0.00
12/17/2009 0.00
12/18/2009 0.00
12/19/2009 **
12/20/2009 0.00
12/21/2009 **
12/22/2009 0.00
12/23/2009 0.32
12/24/2009 **
12/25/2009 **
12/26/2009 0.11
12/27/2009 **
12/28/2009 0.00
12/29/2009 0.00
12/30/2009 0.00
12/31/2009 **
Day of YearDaily PrcpMultiday Prcp
1/1/2010 **
1/2/2010 0.00
1/3/2010 T
1/4/2010 0.00
1/5/2010 0.00
1/6/2010 0.08
1/7/2010 0.04
1/8/2010 **
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 **
1/18/2010 **
1/19/2010 0.00
1/20/2010 0.00
1/21/2010 **
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 0.08
1/29/2010 0.00
1/30/2010 **
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 0.00
2/6/2010 **
2/7/2010 **
2/8/2010 0.24
2/9/2010 0.01
2/10/2010 **
2/11/2010 0.00
2/12/2010 0.00
2/13/2010 0.00
2/14/2010 0.06
2/15/2010 0.00
2/16/2010 0.00
2/17/2010 0.00
2/18/2010 0.00
2/19/2010 0.12
2/20/2010 **
2/21/2010 **
2/22/2010 0.33
2/23/2010 0.00
2/24/2010 0.00
2/25/2010 0.00
2/26/2010 0.03
2/27/2010 **
2/28/2010 **
3/1/2010 0.06
3/2/2010 **
3/3/2010 0.00
3/4/2010 0.00
3/5/2010 0.00
3/6/2010 **
3/7/2010 0.00
3/8/2010 0.00
3/9/2010 0.00
3/10/2010 0.01
3/11/2010 0.05
3/12/2010 0.00
3/13/2010 0.00
3/14/2010 0.18
3/15/2010 0.09
3/16/2010 0.00
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 0.60
3/20/2010 **
3/21/2010 **
3/22/2010 T
3/23/2010 0.00
3/24/2010 1.09
3/25/2010 0.00
3/26/2010 0.00
3/27/2010 T
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 0.00
4/2/2010 T
4/3/2010 0.00
4/4/2010 **
4/5/2010 0.00
4/6/2010 **
4/7/2010 **
4/8/2010 **
4/9/2010 **
4/10/2010 **
4/11/2010 0.10
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 **
4/18/2010 0.03
4/19/2010 0.00
4/20/2010 0.00
4/21/2010 **
4/22/2010 **
4/23/2010 **
4/24/2010 **
4/25/2010 **
4/26/2010 2.67
4/27/2010 0.00
4/28/2010 0.00
4/29/2010 0.60
4/30/2010 **
5/1/2010 **
5/2/2010 **
5/3/2010 **
5/4/2010 T
5/5/2010 0.00
5/6/2010 0.02
5/7/2010 0.11
5/8/2010 T
5/9/2010 0.00
5/10/2010 0.00
5/11/2010 T
5/12/2010 1.11
5/13/2010 0.09
5/14/2010 0.17
5/15/2010 0.26
5/16/2010 T
5/17/2010 0.00
5/18/2010 T
5/19/2010 0.10
5/20/2010 0.00
5/21/2010 T
5/22/2010 0.00
5/23/2010 **
5/24/2010 0.00
5/25/2010 0.00
5/26/2010 0.00
5/27/2010 0.02
5/28/2010 0.00
5/29/2010 **
5/30/2010 **
5/31/2010 **
6/1/2010 **
6/2/2010 **
6/3/2010 **
6/4/2010 **
6/5/2010 0.48
6/6/2010 0.00
6/7/2010 0.00
6/8/2010 T
6/9/2010 0.04
6/10/2010 T
6/11/2010 0.16
6/12/2010 1.48
6/13/2010
6/14/2010 0.58
6/15/2010 0.04
6/16/2010 0.00
6/17/2010 0.00
6/18/2010 **
6/19/2010 **
6/20/2010 **
6/21/2010 0.11
6/22/2010 0.00
6/23/2010 0.00
6/24/2010 0.00
6/25/2010 **
6/26/2010 **
6/27/2010 **
6/28/2010 **
6/29/2010 **
6/30/2010 **
Day of YearDaily PrcpMultiday Prcp
7/1/2010 **
7/2/2010 **
7/3/2010 **
7/4/2010 **
7/5/2010 0.57
7/6/2010 0.00
7/7/2010 0.19
7/8/2010 **
7/9/2010 **
7/10/2010 **
7/11/2010 0.00
7/12/2010 **
7/13/2010 0.00
7/14/2010 0.00
7/15/2010 0.00
7/16/2010 0.00
7/17/2010 **
7/18/2010 **
7/19/2010 T
7/20/2010 0.01
7/21/2010 0.07
7/22/2010 T
7/23/2010 0.23
7/24/2010 0.00
7/25/2010 **
7/26/2010 0.00
7/27/2010 0.00
7/28/2010 0.18
7/29/2010 **
7/30/2010 **
7/31/2010 **
8/1/2010 **
8/2/2010 0.20
8/3/2010 0.05
8/4/2010 0.04
8/5/2010 0.02
8/6/2010 0.00
8/7/2010 0.02
8/8/2010 0.06
8/9/2010 0.01
8/10/2010 0.26
8/11/2010 0.00
8/12/2010 0.00
8/13/2010 0.00
8/14/2010 **
8/15/2010 **
8/16/2010 0.00
8/17/2010 0.45
8/18/2010 0.00
8/19/2010 **
8/20/2010 **
8/21/2010 **
8/22/2010 **
8/23/2010 0.04
8/24/2010 0.10
8/25/2010 0.00
8/26/2010 0.00
8/27/2010 0.00
8/28/2010 **
8/29/2010 **
8/30/2010 **
8/31/2010 **
9/1/2010 **
9/2/2010 **
9/3/2010 0.14
9/4/2010 0.00
9/5/2010 **
9/6/2010 0.00
9/7/2010 **
9/8/2010 **
9/9/2010 **
9/10/2010 **
9/11/2010 **
9/12/2010 **
9/13/2010 0.15
9/14/2010 0.00
9/15/2010 0.00
9/16/2010 0.00
9/17/2010 0.00
9/18/2010 **
9/19/2010 0.02
9/20/2010 0.00
9/21/2010 0.00
9/22/2010 0.02
9/23/2010 0.10
9/24/2010 0.00
9/25/2010 0.00
9/26/2010 **
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
10/7/2009 2:00 PM 0.00 0.0 M M M
10/8/2009 11:30 AM 0.06 M M M M Cloudy with misty rain continuing
10/9/2009 11:00 AM 0.04 M M M M partly cloudy
10/12/2009 5:00 PM 0.00 0.0 M M M
10/13/2009 3:00 PM 0.00 0.0 M M M Partly sunny.
10/14/2009 5:00 PM 0.00 0.0 M M M Sunny & breezy & warm
10/15/2009 3:30 PM 0.00 0.0 M M M Sunny, breezy, warm.
10/16/2009 11:15 AM 0.00 0.0 M M M Clear and sunny
10/17/2009 3:00 PM 0.00 0.0 M M M Clear and pleasant
10/18/2009 4:00 PM 0.00 0.0 M M M mostly sunny, very warm.
10/19/2009 12:05 PM 0.00 0.0 M M M Partly sunny and breezy.
10/20/2009 3:00 PM 0.00 0.0 M M M Cloudy, NE breeze.
10/21/2009 4:45 PM 0.31 M M M M Cloudy with slight drizzle earlier in p.m.
10/22/2009 12:10 PM T M M M M Sunny and clear.
10/23/2009 12:05 PM T M M M M Sunny and clear and breezy (SE)
10/26/2009 4:30 PM 0.04 M M M M Clear, chilly. Precip. is from yesterday p.m.
10/27/2009 10:45 AM 0.00 0.0 M M M Cloudy and breezy (SW-W)
10/30/2009 3:00 PM 0.01 M M 10.0 M about 1/2" new snow late evening 10/29/2009. All snow settling down and melting rapidly.
10/31/2009 3:50 PM 0.00 0.0 M 4.0 M Clear and sunny and breezy. Snow melting rapidly. Some bare spots already showing in grassy meadows.
11/4/2009 2:00 PM 0.00 0.0 M M M Clear, sunny, pleasant. Ground bare (a few patches of snow still left on north side of bilding).
11/5/2009 2:00 PM 0.00 0.0 M M M partly cloudy, breezy, and very warm.
11/6/2009 3:30 PM 0.00 0.0 M M M Clear, warm and very breezy.
11/7/2009 1:10 PM 0.00 0.0 M M M Mostly sunny and warm
11/8/2009 3:00 PM 0.00 0.0 M M M
11/9/2009 3:30 PM 0.00 0.0 M M M Mostly sunny and pleasant.
11/10/2009 9:00 AM 0.00 0.0 M M M Sunny and clear
11/11/2009 3:00 PM 0.00 0.0 M M M Partly sunny and cool.
11/12/2009 3:00 PM 0.00 0.0 M M M Sunny, breezy (WSW), and warm (Chinook).
11/13/2009 2:00 PM 0.00 0.0 M M M Cloudy and threatening.
11/14/2009 4:00 PM 0.07 M M M M Snowfall has been melting and now (4 p.m.) it is just beginning to stick to the grass and fenceposts. Snow continuing.
11/17/2009 3:00 PM 0.00 0.0 M 6.7 M Clear and cool. Snow on north side of building averages 6.7" deep, but in sunny meadow it is only 2.0-2.5" deep with some patchy grass tufts showing.
11/18/2009 3:00 PM 0.00 0.0 M M M
11/19/2009 2:00 PM 0.00 0.0 M 5.0 M Clear and cool. Snow depth on north side of building is 5" but in open meadow it has melted into a mozaic pattern of bare spots and patches of snow about 1" deep maximum.
11/20/2009 3:00 PM 0.00 0.0 M 4.5 M Clear, sunny, and pleasant. Old snow depth on north side of building (shade) is 4.5". In sunny meadow a majority of ground is bare with patches of snow 1" or less in depth.
11/25/2009 4:00 PM 0.00 0.0 M M M Not reporting old snow on north side of building (3") anymore, as rest of the ground (meadow) in the sun is bare, and old snow in shade is crusted and needs a "Chinook" to remove it!
11/28/2009 3:00 PM 0.00 0.0 M M M High cirrus clouds; NE wind
12/1/2009 3:30 PM 0.00 0.0 M M M Partly cloudy.
12/2/2009 4:00 PM 0.17 3.0 M M M
12/3/2009 3:00 PM 0.01 0.2 M 2.6 M "Skiff" of new snow during the night.
12/4/2009 3:00 PM 0.00 0.0 M 2.2 M Mostly cloudy, breezy, and chilly.
12/5/2009 3:00 PM 0.00 0.0 M M M mostly sunny.
12/6/2009 11:15 AM 0.10 2.5 M M M Snow continuing. Storm started early this a.m. during the night.
12/7/2009 3:00 PM 0.06 1.0 M 5.5 M
12/8/2009 4:20 PM 0.06 0.8 M 6.0 M Cloudy, very cold; snow continues.
12/9/2009 3:00 PM T T M 5.5 M Mostly sunny and very cold.
12/10/2009 4:45 PM 0.00 0.0 M 5.0 M Strong wind last night caused drifting, so old snow depth not accurate anymore: varied from 4" to 9" with even some bare spots.
12/15/2009 4:00 PM 0.00 0.0 M 3.0 M Due to blowing and drifting snow last week, the 3" is just an approximate depth on north side of building (varies from 2" to 5"). In sunny meadow, the ground is mostly (three quarters) bare except for patches of snow 1" to 3" deep. Meadow, therefore, looks brown with a mozaic of scattered white patches.
12/16/2009 4:30 PM 0.00 0.0 M 3.0 M Ground mostly bare in meadow with a few patches of snow. Snow in shade on north side of building averages about 3" in depth with much variation.
12/17/2009 2:30 PM 0.00 0.0 M 3.0 M Ground mostly bare. Old snow on north side of building is crusty and 2" to 4" in depth (average 3").
12/18/2009 3:00 PM 0.00 0.0 M M M Clear and pleasant. Ground bare. Old crusted snow (2"-4") only on north side of bulding.
12/23/2009 4:30 PM 0.32 5.0 M M M Snow continuing.
12/29/2009 4:00 PM 0.00 0.0 M 4.0 M Old snow depth is variable (4" to 9") due to drifting during previous storm(s).
12/30/2009 5:00 PM 0.00 0.0 M M M no change from yesterday in snow depth.
1/3/2010 5:30 PM T 0.2 M 2.2 M Old snow varies from 2" to 3-7" on north side of building (old drifts). Mostly cloudy and chilly.
1/4/2010 5:00 PM 0.00 0.0 M M M
1/5/2010 2:00 PM 0.00 0.0 M 2.0 M Cloudy. Old snow is about 2" deep, except on north side of building where it varies from 4" to 9" (old drifts).
1/6/2010 5:15 PM 0.08 2.0 M 4.0 M Snow is continuing.
1/7/2010 5:00 PM 0.04 1.0 M 4.0 M Clear and very cold. Old and new snow is deeper on the north side of building (in the shade) because of former drifting.
1/10/2010 5:00 PM 0.00 0.0 M M M
1/11/2010 5:00 PM 0.00 0.0 M M M Clear
1/12/2010 12:40 PM 0.00 0.0 M 2.5 M Meadow still white with grassy patches showing more and more each day....snow depth average 2.2" but on north side of building (in shade) crusty snow depth is still 4-8" deep.
1/13/2010 11:30 AM 0.00 0.0 M 2.0 M Meadows still generally white with snow, but becomming more patchy (grass tufts showing). Chinook today with temp. in the 50s causing more melting. Partly cloudy (prominent convection cloud).
1/14/2010 3:00 PM 0.00 0.0 M 2.0 M Meadow snow more patchy as more grass tufts show through and snow melts back, but sill looks generally white.
1/15/2010 5:00 PM 0.00 0.0 M 2.0 M Crusty snow patches in meadow melted enough so they now make a mazaic pattern (not solid white) with the grassy tufts. Clear, cool, and still.
1/16/2010 5:00 PM 0.00 0.0 M 2.0 M Clear. Pleasant. No significant change from yesterday: patchy snow melted slightly more.
1/20/2010 1:00 PM 0.00 0.0 M M M Cloudy and cool.
1/23/2010 2:00 PM 0.00 0.0 M M M Mostly cloudy with breeze; pleasant.
1/24/2010 3:00 PM 0.00 0.0 M M M Mostly cloudy and windy.
1/25/2010 1:30 PM 0.00 0.0 M M M Mostly sunny and cool. Ground bare in meadows. Old crusted snow only on north facing slopes and in shade on north side of building.
1/26/2010 2:00 PM 0.00 0.0 M M M Partly cloudy, cool, breezy.
1/27/2010 3:00 PM 0.00 0.0 M M M Cloudy and chilly.
1/28/2010 2:30 PM 0.08 0.8 M 0.8 M Cloudy. Snow started after dark on Wednesday (Jan. 27) and ended about 11 p.m., with a few fluries after midnight.
1/29/2010 4:00 PM 0.00 0.0 M M M All new snow from two nights ago is melted (in the meadow ground is bare). Only remaining snow is on north-facing slopes and on north side of building in shade. Sunny and clear.
2/1/2010 1:30 PM 0.00 0.0 M M M Clear and cool.
2/2/2010 4:30 PM 0.00 0.0 M M M Partly cloudy and cool.
2/3/2010 1:00 PM 0.00 0.0 M M M Cloudy (high cirrus clouds) and cool.
2/4/2010 2:00 PM 0.02 T M M M Partly cloudy and windy. Slight snow/rain showers last evening. Any new snow is melted by now.
2/5/2010 4:00 PM 0.00 0.0 M M M Partly Cloudy and cool.
2/9/2010 3:00 PM 0.01 0.2 M 4.6 M
2/12/2010 10:30 AM 0.00 0.0 M M M Partly cloudy.
2/13/2010 5:00 PM 0.00 0.0 M M M
2/14/2010 3:00 PM 0.06 1.0 M 1.0 M Snow began around midnight and ended in mid-morning on Saturday.
2/15/2010 3:30 PM 0.00 0.0 M M M Partly cloudy. New snow from Saturday has melted. A few snow patches in meadow, but mostly bare ground. There is stil 1" to 9" of very old snow on north side of building (in shade) that has persisted for a long time. We will not keep reporting this on a daily basis.
2/16/2010 10:30 AM 0.00 0.0 M M M Clear and cool.
2/17/2010 4:30 PM 0.00 0.0 M M M Cloudy and cool.
2/18/2010 1:00 PM 0.00 0.0 M M M Cloudy, about to start snowing.
2/19/2010 12:50 PM 0.12 1.9 M 1.9 M Cloudy, calm, chilly.
2/23/2010 5:00 PM 0.00 0.0 M M M Clear and cool
2/24/2010 5:00 PM 0.00 0.0 M M M
2/25/2010 1:00 PM 0.00 0.0 M 1.0 M Mostly cloudy. Meadow has patchy old snow about 1" in depth so even though it is patchy, the meadow appears to be fairly white.
2/26/2010 3:30 PM 0.03 0.3 M 0.0 M Clear and Sunny. Snow all melted on south side of building, and mostly melted in meadow with a few patches of old snow persisting, expecially on north-facing slopes and on north side of building in the shade.
3/4/2010 4:00 PM 0.00 0.0 M M M Clear and pleasant. Still some old snow on north side of building in the shade and on a few north-facing slopes, otherwise meadow is bare (all snow melted).
3/5/2010 4:00 PM 0.00 0.0 M 0.0 M Partly to mostly cloudy, cool, and breezy.
3/8/2010 3:30 PM 0.00 0.0 M M M Cloudy
3/9/2010 3:30 PM 0.00 0.0 M M M Mostly cloudy
3/10/2010 11:30 AM 0.01 M M M M Mostly sunny with clouds over the mountains. Shower last evening.
3/11/2010 2:00 PM 0.05 M M M M Mostly sunny and pleasant. Wet (melting) snow showers yesterday afternoon and evening.
3/12/2010 3:00 PM 0.00 0.0 M M M Clear, sunny, calm, pleasant.
3/13/2010 3:00 PM 0.00 0.0 M M M mostly clear
3/14/2010 6:30 PM 0.18 M M M M Cloudy, and rain continuing.
3/15/2010 1:00 PM 0.09 M M M M Mostly clear. Precip. is from yesteday.
3/16/2010 2:00 PM 0.00 0.0 M M M Clear and pleasant.
3/17/2010 2:00 PM 0.00 0.0 M M M Clear and pleasant
3/18/2010 3:00 PM 0.00 0.0 M M M high thin clouds, pleasant.
3/19/2010 2:50 PM 0.60 8.1 M 8.1 M Heavy snow from early morning until afternoon, with some blowing snow. North to northeast wind. Light snow continuing. Cold.
3/23/2010 10:50 AM 0.00 0.0 M M M Mostly cloudy.
3/24/2010 4:00 PM 1.09 9.0 M 9.0 M Clear and cool. Big snowstorm that started mid-day yesterday and ended this morning is melting fast, so snow has settled to about 8" or less in many places.
3/25/2010 2:00 PM 0.00 0.0 M 3.0 M Mostly sunny. 44 degrees F. Snow in meadow settled to 3" deep. Snow in shade on north side of building 8" deep.
3/26/2010 1:45 PM 0.00 0.0 M 2.0 M Cloudy. SW breeze. 46 degrees F. Snow on ground is melted and settled a lot (2" deep), but meadow still white.
3/27/2010 5:00 PM T 0.0 M 0.0 M Partly cloudy. Breezy. 45 degrees F. Snow in meadow is mostly melted with bare ground. Old snow persists on north side of building and on north-facing slopes.
3/28/2010 3:00 PM 0.00 0.0 M M M
3/29/2010 4:00 PM 0.00 0.0 M M M Sunny with high thin clouds. Warm 70 degrees F. Old snow all melted, except for small patch on north side of building.
3/30/2010 1:30 PM 0.00 0.0 M M M Mostly sunny with high clouds. Warm: 72 degrees F. Breezy (South wind).
3/31/2010 11:15 AM 0.00 0.0 M M M Partly Cloudy. 55 degrees F. SW Breeze.
4/1/2010 3:00 PM 0.00 0.0 M M M Cloudy and threatening. 55 degrees F. Strong West wind.
4/2/2010 3:00 PM T 0.0 M M M Partly cloudy. 49 degrees F. West breeze. Yesterday afternoon there was a slight sprinkle of small sleet and later a few drops of rain, not enough to measure.
4/3/2010 4:00 PM 0.00 0.0 M M M Partly cloudy and very windy (from SSW). 55 degrees F.
4/12/2010 2:45 PM 0.00 0.0 M M M Cloudy and strong breeze (S). 72 degrees F.
4/13/2010 2:15 PM 0.00 0.0 M M M Partly cloudy and very windy (WSW). 59 degrees F.
4/14/2010 1:45 PM 0.00 0.0 M M M Clear except for a few high cirrus clouds. Breezy (SSW). 65 degrees F.
4/15/2010 2:00 PM 0.00 0.0 M M M Mostly sunny with high cirrus clouds, SW breeze. 64 degrees F.
4/16/2010 2:15 PM 0.00 0.0 M M M Cloudy. Calm to slight breeze (WSW). 56 degrees F.
4/19/2010 7:30 PM 0.00 0.0 M M M Partly cloudy. Calm. 62 degrees F.
4/20/2010 5:20 PM 0.00 0.0 M M M Mostly cloudy. Calm. 51 degrees F.
4/27/2010 5:30 PM 0.00 0.0 M M M Mostly cloudy. 54 degrees F. Slight breeze from the West.
4/28/2010 2:45 PM 0.00 0.0 M M M Partly cloudy and windy (SW). 76 degrees F.
4/29/2010 2:30 PM 0.60 1.0 M 0.0 M Partly cloudy and breezy (W). 52 degrees F. Snow and rain this a.m. early. All snow melted by the time of observation.
5/5/2010 11:50 AM 0.00 0.0 M M M Partly Cloudy. 58 degrees F. SSW breeze.
5/6/2010 2:00 PM 0.02 M M M M Cloudy with light rain (rain continuing). 54 degrees F. Slight breeze from the West.
5/7/2010 2:00 PM 0.11 M M M M Partly cloudy. 55 degrees F. Slight breeze from the North. Skif of snow (about a half inch) on the ground this morning soon melted.
5/8/2010 3:20 PM T M M M M Cloudy. 57 degrees F. Very slight West breeze.
5/9/2010 8:30 PM 0.00 0.0 M M M Calm. Partly cloudy. 61 degreees F.
5/10/2010 10:00 AM 0.00 0.0 M M M Partly cloudy. 62 degrees F. North breeze.
5/11/2010 2:15 PM T M M M M Cloudy (threatening to rain), 46 degrees F., NW Breeze.
5/12/2010 10:15 AM 1.11 1.0 M M M Cloudy, NE breeze, 39 degrees F. Precipitation started early p.m. on 5/11 and became heavier in the late afternoon and evening, mostly in the form of rain, then turning to snow near midnight.
5/13/2010 2:10 PM 0.09 M M M M Cloudy. 54 degrees F. SE gentle breeze. Rain and snow yesterday late afternoon and evening.
5/14/2010 10:30 AM 0.17 M M M M Partly cloudy (low cumulus); 56 degrees F.; Light NE breeze. Rain last evening.
5/15/2010 3:20 PM 0.26 M M M M Partly cloudy (cumulus and cirus clouds). 61 degrees F. with a NE breeze. Rain last evening.
5/16/2010 8:50 PM T M M M M Clear. 60 degrees F. Calm. Slight shower yesterday afternoon.
5/17/2010 3:45 PM 0.00 0.0 M M M Mostly sunny. 72 degrees F. Light NW breeze.
5/18/2010 2:10 PM T M M M M Partly cloudy. 67 degrees F. NNE-NE breeze. Few drops of rain in late morning.
5/19/2010 3:00 PM 0.10 M M M M Mostly cloudy. 69 degrees F. NE wind. Rain yesterday evening (thunderstorm) 0.09" and slight rain at mid-day today 0.01" (total 0.10").
5/20/2010 2:00 PM 0.00 0.0 M M M Partly cloudy, mostly sunny, 68 degrees F., SE breeze.
5/21/2010 2:00 PM T 0.0 M M M Mostly sunny. 73 degrees F. SSE-SE breeze.
5/22/2010 2:00 PM 0.00 0.0 M M M Partly cloudy. 85 degrees F. (warm). Fairly strong SW wind.
5/25/2010 2:00 PM 0.00 0.0 M M M Partly Cloudy. Strong SW breeze. 71 degrees F.
5/26/2010 11:10 AM 0.00 0.0 M M M Partly cloudy. 70 degrees F with NE breeze.
5/27/2010 4:50 PM 0.02 M M M M Partly cloudy. NE breeze. 82 degrees F. Shower last evening.
5/28/2010 11:25 AM 0.00 0.0 M M M Partly cloudy. 80 degrees F. N breeze.
6/6/2010 4:20 PM 0.00 0.0 M M M Mostly cloudy. 87 degrees F. NNE-NE Breeze.
6/7/2010 6:10 PM 0.00 0.0 M M M Partly Cloudy; 87 degrees F.; Very slight NE breeze.
6/8/2010 12:50 PM T 0.0 M M M Partly cloudy. 76 degrees F. S-SW wind.
6/9/2010 2:00 PM 0.04 M M M M Partly Cloudy. 82 degrees F. NNE Breeze. Showers yesterday afternoon.
6/10/2010 4:40 PM T M M M M Cloudy. 78 degrees F. Slight N Breeze.
6/11/2010 4:25 PM 0.16 M M M M Cloudy and raining. Shower last night and this afternoon. Rain continuing. 64 degrees F. Slight W breeze.
6/12/2010 1:30 PM 1.48 M M M M Cloudy. 54 degrees F. Slight NE breeze. Heavy rainstorms yesterday afternoon, evening, and this morning.
6/14/2010 3:20 PM 0.58 M M M M Cloudy. 65 degrees F. Breeze from the S. Rain ended this morning, but a thunderstorm is now threatening.
6/15/2010 2:30 PM 0.04 M M M M Clear, 77 degrees F., SE breeze. Shower yesterday afternoon.
6/16/2010 5:45 PM 0.00 0.0 M M M Partly cloudy. SW fairly strong breeze. 84 degrees F.
6/17/2010 3:00 PM 0.00 0.0 M M M Clear. 84 degrees F. Strong breeze from the E or NNE.
6/22/2010 2:55 PM 0.00 0.0 M M M Mostly clear; 85 degrees F.; NNE slight breeze.
6/23/2010 4:30 PM 0.00 0.0 M M M Mostly clear. 79 degrees F. Fairly strong E breeze.
6/24/2010 7:00 AM 0.00 0.0 M M M Clear. 85 degrees F. Breeze from the NE.
7/6/2010 11:00 AM 0.00 0.0 M M M Mostly clear. 82 degrees F. Slight N breeze.
7/7/2010 2:30 PM 0.19 M M M M Cloudy and raining; 58 degrees F.; calm (no breeze).
7/14/2010 4:00 PM 0.00 0.0 M M M Mostly cloudy; 88 degrees F.; NE breeze.
7/15/2010 2:00 PM 0.00 0.0 M M M Clear; 84 degrees F.; NNE Breeze.
7/16/2010 2:15 PM 0.00 0.0 M M M Clear; 90 degrees F.; NNE breeze.
7/20/2010 1:30 PM 0.01 M M M M Partly cloudy and spitting a few drops of rain; 70 degrees F.; slight East breeze.
7/21/2010 5:30 PM 0.07 M M M M Partly cloudy; 81 degrees F.; ENE breeze.
7/22/2010 5:00 PM T M M M M Partly cloudy; 85 degrees F.; fairly strong NE wind.
7/23/2010 4:50 PM 0.23 M M M M Partly cloudy; 89 degrees F.; NE breeze; heavy shower last evening at about 6 p.m.
7/24/2010 3:15 PM 0.00 0.0 M M M Partly cloudy; 83 degrees F.; S to SE strong breeze
7/27/2010 2:20 PM 0.00 0.0 M M M Cloudy; 87 degrees F.; strong SE wind. Threatening to storm.
7/28/2010 5:00 PM 0.18 M M M M Cloudy with light rain that just began; 78 degrees F.; slight South breeze. Most precip. is from shower yesterday afternoon.
8/3/2010 11:30 AM 0.05 M M M M Partly cloudy; 82 degrees F.; slight NE breeze.
8/4/2010 4:30 PM 0.04 M M M M Cloudy and raining; 67 degrees F.; NW wind. Thundershowers in area. Rain continuing.
8/5/2010 3:45 PM 0.02 M M M M Partly Cloudy; 82 degrees F.; Slight NW breeze.
8/6/2010 12:10 PM 0.00 0.0 M M M Partly Cloudy; 82 degrees F.; light SE breeze.
8/7/2010 1:00 PM 0.02 M M M M Partly cloudy; 84 degrees F.; NE breeze.
8/8/2010 5:15 PM 0.06 M M M M Partly cloudy; 84 degrees F.; SE breeze.
8/9/2010 3:45 PM 0.01 M M M M Mostly cloudy with very dark clouds to the west; 75 degrees F.; strong west wind.
8/10/2010 10:40 AM 0.26 M M M M Clear; 77 degrees F.; North breeze. Heavy shower yesterday afternoon starting at aboout 3:45 p.m.
8/11/2010 5:55 PM 0.00 0.0 M M M Partly cloudy; 83 degrees F.; strong West breeze.
8/12/2010 2:40 PM 0.00 0.0 M M M Mostly cloudy; 85 degrees F.; Light NNE breeze.
8/13/2010 2:35 PM 0.00 0.0 M M M Clear; 81 degrees F.; East breeze.
8/17/2010 1:20 PM 0.45 M M M M Partly cloudy; 77 degrees F.; East breeze. Very heavy rainstorm yesterday early evening (around 6 p.m.).
8/18/2010 11:40 AM 0.00 0.0 M M M Partly Cloudy; 84 degrees F.; slight East breeze.
8/24/2010 3:15 PM 0.10 M M M M Partly cloudy; 73 degrees F.; North breeze; shower yesterday afternoon.
8/25/2010 4:20 PM 0.00 0.0 M M M Clear (a few clouds over the mountains); 80 degrees F.; NNE-NE breeze.
8/26/2010 2:45 PM 0.00 0.0 M M M Mostly clear; 86 degrees F.; moderate ESE breeze.
8/27/2010 3:35 PM 0.00 0.0 M M M Partly cloudy; 84 degrees F., gusty SW wind.
9/4/2010 8:10 PM 0.00 0.0 M M M Clear and calm. 76 degrees F.
9/14/2010 5:35 PM 0.00 0.0 M M M Partly cloudy; slight SW breeze; 78 degrees F.
9/15/2010 3:00 PM 0.00 0.0 M M M Partly cloudy; 78 degrees F.; fairly strong NE wind.
9/16/2010 1:45 PM 0.00 0.0 M M M Mostly clear; 74 degrees F.; NNE Breeze.
9/17/2010 4:30 PM 0.00 0.0 M M M Mostly clear; 75 degrees F.; NNE breeze
9/20/2010 12:30 PM 0.00 0.0 M M M Partly cloudy; 86 degrees F.; West wind with fairly strong gusts.
9/21/2010 11:35 AM 0.00 0.0 M M M Clear; 62 degrees F.; slight East breeze.
9/22/2010 2:40 PM 0.02 M M M M Cloudy and raining; 64 degrees F.; Slight WNW breeze. Rain continuing.
9/23/2010 5:00 PM 0.10 M M M M Mostly clear; 72 degrees F.; North breeze. Precip. is from rain yesterday afternoon.
9/24/2010 1:20 PM 0.00 0.0 M M M Partly Cloudy; 71 degrees F.; slight NE breeze.
9/25/2010 2:45 PM 0.00 0.0 M M M Clear; 69 degrees F.; light North breeze.
9/28/2010 2:45 PM 0.00 0.0 M M M Clear; 78 degrees F.; South breeze.
9/29/2010 11:15 AM 0.00 0.0 M M M Clear; 75 degrees F.; Strong NE/ENE breeze.
9/30/2010 4:15 PM 0.00 0.0 M M M Clear; 67 degrees F.; Light NNE breeze.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
9/25/2009 10/06/2009 12:40 PM 12 0.33 M M Observer was away for 12 days, so this is what was in the guage upon return. It was mostly rain from 10/5/2009 (yesterday).
10/10/2009 10/11/2009 7:00 PM 2 0.14 1.0 M Snowstorm on Saturday had about 5" of snow on the ground that had mostly melted by evening on Sunday.
10/24/2009 10/25/2009 4:15 PM 2 0.09 M M Cloudy, chilly. Wet snow showers (melting) earlier in the day.
10/28/2009 10/29/2009 4:15 PM 2 1.10 15.0 1.10 Storm started late p.m. 10/27/2009 and continued to present time with most of snow falling on 10/28/2009 all day and into the night. Cloudy and still spitting slight snow.
11/1/2009 11/02/2009 1:20 PM 2 0.00 0.0 M All snow is melted except on north side of bulding and on north slope of meadow.
11/15/2009 11/16/2009 3:00 PM 2 0.59 7.0 M Snowstorm started to accululate on Saturday afternoon 11/14/2009 and ended evening of 11/15/2009 and was 7" in amount with high water content.
11/21/2009 11/22/2009 5:00 PM 2 0.00 3.0 M Ground bare except on north side of building where the snow depth is now about 3" (old packed frozen snow).
11/23/2009 11/24/2009 12:30 PM 2 0.00 M M
11/26/2009 11/27/2009 4:00 PM 2 0.00 M M Clear and pleasant.
11/29/2009 11/30/2009 1:30 PM 2 0.00 M M Clear and pleasant.
12/11/2009 12/12/2009 3:00 PM 2 0.00 4.0 M Mostly sunny and breezy and pleasant. Old snow depth is just an average due to drifts from former blowing snow.
12/13/2009 12/14/2009 4:30 PM 2 0.00 3.0 M Old snow depth on north side of building is 3" approx. due to former blowing and drifting snow. Ground mostly bare in sunny meadow with patches of snow about 1" to 2" deep.
12/19/2009 12/20/2009 2:15 PM 2 0.00 M M clear; 51 degres F.
12/21/2009 12/22/2009 2:45 PM 2 0.00 M M Cloudy
12/24/2009 12/26/2009 4:30 PM 3 0.11 7.0 M
12/27/2009 12/28/2009 6:00 PM 2 0.00 4.0 M Because of drifting from previous storms, snow on ground varies from 4" to 9" on north side of building.
12/31/2009 1/02/2010 5:00 PM 3 0.00 M M
1/8/2010 1/09/2010 5:00 PM 2 0.00 4.0 M Meadow looks white with few tufts of taller grass showing in spots; old snow 2-4" deep is crusted. On north side of building old snow is 4-7" deep, crusted.
1/17/2010 1/19/2010 5:00 PM 3 0.00 0.0 M Snow mostly melted, except on north side of building.
1/21/2010 1/22/2010 12:55 PM 2 0.00 M M Ground mostly bare (brownish-tan grass in meadows). A few patches of snow in shady areas or on north-facing slopes.
1/30/2010 1/31/2010 5:00 PM 2 0.00 M M Mostly clear. Ground bare except for old crusted snow in shade on north side of building.
2/6/2010 2/08/2010 2:30 PM 3 0.24 4.5 M Cloudy, snow continuing.
2/10/2010 2/11/2010 2:00 PM 2 0.00 1.0 M Partly cloudy. Only patches of snow left unmelted in meadow. Patches about 1.0" in depth, but a majority of ground is bare.
2/20/2010 2/22/2010 12:30 PM 3 0.33 5.5 M Clear and cool. 5.0" of new snow in storm that persisted over the weekend. Snow depth 7" in the shade on north side of building.
2/27/2010 3/01/2010 3:30 PM 3 0.06 0.0 M Partly Cloudy. New snow yesterday is all melted (0.06"). Much of it came down as wet snow that melted right away where it fell, so there was very little accumulation (around 0.5"), which was melted by the time of this reading. On the north side of building in the shade there is still old snow about 4.0" deep up to 12.0" in a few spots where it had drifted. This snow has persisted for a long time because of the relatively cool/cold weather with nights usually below freezing.
3/2/2010 3/03/2010 9:15 AM 2 0.00 0.0 M Partly sunny.
3/6/2010 3/07/2010 5:00 PM 2 0.00 M M Clear and pleasant
3/20/2010 3/22/2010 3:00 PM 3 T M M Clear and warm (65 degrees F.) All snow from 3/19 storm is melted.
4/4/2010 4/05/2010 6:50 PM 2 0.00 M M 4/4/10 mostly sunny. 4/5/10 partly sunny becomming mostly cloudy and 57 degrees F. at 6:50 p.m. with slight SW breeze.
4/6/2010 4/11/2010 6:00 PM 6 0.10 0.0 M Observer was away for one week, so this is an approximate reading from a small (extra) guage, since precip. in the large cylinder had completely evaporated. I know there was snow, rain, and sleet or hail during this period.
4/17/2010 4/18/2010 6:00 PM 2 0.03 M M Partly cloudy. 62 degrees F. Slight SE breeze. Rain shower(s) on Saturday 4/17/2010.
4/21/2010 4/26/2010 3:30 PM 6 2.67 0.0 M Mostly cloudy. 56 degrees F. Slight NE/NNE breeze. Primary observer was away for five days, so report is cumulative. There were considerable periods of rain and snow during my absence.
4/30/2010 5/04/2010 2:00 PM 5 T M M Primary observer was out-of-town for four days, so no observarions were made. Today, 5/4/10, is clear and very windy (WSW to W) at 30-50 mph with gusts up to 80 mph (Chinook wind). 70 degrees F.
5/23/2010 5/24/2010 11:15 AM 2 0.00 M M Today 5/24/10 partly cloudy and very windy (strong SW wind). 77 degrees F.
5/29/2010 6/05/2010 5:50 PM 8 0.48 M M Mostly Cloudy. N-NE breeze. 83 degrees F. NOTE: Observer was out of town for a week, so 0.48" of precip. was in the guage when I returned today.
6/18/2010 6/21/2010 3:35 PM 4 0.11 M M Partly cloudy. 78 degrees F. ENE-E Breeze. Rain and hail storm today from about 2:58 to about 3:07 p.m.
6/25/2010 7/05/2010 3:15 PM 11 0.57 M M Mostly clear. 81 degrees F. Breeze from NE. Observer was out of town for nine days, so measurement is what was in the guage when I returned. There was a major rainstorm last night right after I returned.
7/8/2010 7/11/2010 5:25 PM 4 0.00 M M Cloudy. Strong WSW wind. 67 degrees F. Threatening to shower.
7/12/2010 7/13/2010 4:45 PM 2 0.00 M M Mostly Cloudy; 91 degrees F.; ENE breeze.
7/17/2010 7/19/2010 2:50 PM 3 T M M Partly cloudy; 90 degrees F.; East breeze.
7/25/2010 7/26/2010 3:55 PM 2 0.00 M M Mostly clear; 90 degrees F.; NNE breeze.
7/29/2010 8/02/2010 2:00 PM 5 0.20 M M Mostly cloudy; 84 degrees F.; strong North breeze. Note that obsever was out-of-town for four days, so precip. is what was in the guage this aftenoon. There were showers in the area last evening.
8/14/2010 8/16/2010 2:50 PM 3 0.00 M M Mostly cloudy. 76 degrees F. NNW Breeze.
8/19/2010 8/23/2010 2:45 PM 5 0.04 M M Partly cloudy; 81 degrees F.; Strong east breeze. Note that observer has been out-of-town since 8/18.
8/28/2010 9/03/2010 3:15 PM 7 0.14 M M Clear; 79 degrees F.; Slight NE breeze. NOTE: Observer was out-of-town for a week, so some of the precip. might have evaporated from the guage.
9/5/2010 9/06/2010 5:15 PM 2 0.00 M M Clear, except for smoke cloud from major forest fire west of Boulder in the foothills; 73 degrees F.; breeze from the East.
9/7/2010 9/13/2010 3:00 PM 7 0.15 M M Partly cloudy; 82 degreees F.; NW srong breeze. NOTE: observer was away for a week. Precip. measured on 9/9/10 by a volunteer had 0.15" of moisture.
9/18/2010 9/19/2010 8:20 PM 2 0.02 M M Clerar; 67 degrees F.; very slight SE breeze. Precip. is from Saturday morning 9/18/2010.
9/26/2010 9/27/2010 12:25 PM 2 0.00 M M Clear; 76 degrees F.; strong NE breeze



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