Station Overview Station Location
Station Number CO-BO-280 Latitude 40.0295
Station Name Boulder 7.0 W Longitude -105.3842
County Boulder Elevation (ft) 7609



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 1.36 2.56 31 2.56 31 0.00 0 0 11 4 34.9 8 8
Nov 09 1.17 0.85 28 0.85 28 0.00 0 0 3 1 9.6 3 4
Dec 09 0.93 0.81 21 0.81 21 0.00 0 0 6 2 17.2 6 7
Jan 10 0.72 0.00 17 0.00 17 0.00 0 0 0 1 0.0 0 0
Feb 10 0.83 0.31 9 0.31 9 0.00 0 0 4 0 6.4 4 4
March 10 2.23 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 10 2.88 3.81 6 3.81 6 0.00 0 0 5 0 0.0 0 0
May 10 2.90 0.42 1 0.42 1 0.00 0 0 1 0 0.0 0 0
June 10 2.58 2.57 2 2.57 2 0.00 0 0 2 0 0.0 0 0
July 10 2.07 1.52 9 1.52 9 0.00 0 0 9 0 0.0 0 0
Aug 10 2.26 0.71 3 0.71 3 0.00 0 0 3 0 0.0 0 0
Sept 10 1.59 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 21.52" 13.56" 127 days 13.56" 127 0.00" 0 days 0 44 days 8 days 68.1" 21 days 23 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 0.02
10/6/2009 0.02
10/7/2009 0.00
10/8/2009 T
10/9/2009 0.15
10/10/2009 0.16
10/11/2009 0.02
10/12/2009 T
10/13/2009 T
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 0.32
10/22/2009 0.08
10/23/2009 0.00
10/24/2009 0.00
10/25/2009 0.05
10/26/2009 0.20
10/27/2009 0.00
10/28/2009 0.93
10/29/2009 0.61
10/30/2009 T
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 0.74
11/16/2009 0.04
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
11/29/2009 T
11/30/2009
12/1/2009 0.00
12/2/2009 0.25
12/3/2009 0.10
12/4/2009 T
12/5/2009 0.00
12/6/2009 0.22
12/7/2009 0.13
12/8/2009 0.05
12/9/2009 0.06
12/10/2009 T
12/11/2009 0.00
12/12/2009 0.00
12/13/2009 0.00
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 0.00
12/20/2009 0.00
12/21/2009 0.00
12/22/2009
12/23/2009
12/24/2009
12/25/2009
12/26/2009
12/27/2009
12/28/2009
12/29/2009
12/30/2009
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010
1/2/2010
1/3/2010
1/4/2010
1/5/2010
1/6/2010
1/7/2010
1/8/2010
1/9/2010
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
1/28/2010
1/29/2010
1/30/2010
1/31/2010
2/1/2010 0.00
2/2/2010 0.00
2/3/2010 0.00
2/4/2010 0.01
2/5/2010 0.00
2/6/2010 0.00
2/7/2010 0.07
2/8/2010 0.19
2/9/2010 0.04
2/10/2010
2/11/2010
2/12/2010
2/13/2010
2/14/2010
2/15/2010
2/16/2010
2/17/2010
2/18/2010
2/19/2010
2/20/2010
2/21/2010
2/22/2010
2/23/2010
2/24/2010
2/25/2010
2/26/2010
2/27/2010
2/28/2010
3/1/2010
3/2/2010
3/3/2010
3/4/2010
3/5/2010
3/6/2010
3/7/2010
3/8/2010
3/9/2010
3/10/2010
3/11/2010
3/12/2010
3/13/2010
3/14/2010
3/15/2010
3/16/2010
3/17/2010
3/18/2010
3/19/2010
3/20/2010
3/21/2010
3/22/2010
3/23/2010
3/24/2010
3/25/2010
3/26/2010
3/27/2010
3/28/2010
3/29/2010
3/30/2010
3/31/2010
Day of YearDaily PrcpMultiday Prcp
4/1/2010
4/2/2010
4/3/2010
4/4/2010
4/5/2010
4/6/2010
4/7/2010
4/8/2010
4/9/2010
4/10/2010
4/11/2010
4/12/2010
4/13/2010
4/14/2010
4/15/2010
4/16/2010
4/17/2010
4/18/2010
4/19/2010
4/20/2010
4/21/2010
4/22/2010 1.33
4/23/2010 0.88
4/24/2010 0.50
4/25/2010
4/26/2010 0.62
4/27/2010 0.00
4/28/2010
4/29/2010 0.48
4/30/2010
5/1/2010
5/2/2010
5/3/2010
5/4/2010
5/5/2010
5/6/2010 0.42
5/7/2010
5/8/2010
5/9/2010
5/10/2010
5/11/2010
5/12/2010
5/13/2010
5/14/2010
5/15/2010
5/16/2010
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010
5/27/2010
5/28/2010
5/29/2010
5/30/2010
5/31/2010
6/1/2010
6/2/2010
6/3/2010
6/4/2010
6/5/2010
6/6/2010
6/7/2010
6/8/2010
6/9/2010
6/10/2010
6/11/2010
6/12/2010 1.90
6/13/2010 0.67
6/14/2010
6/15/2010
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010
6/24/2010
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 0.10
7/4/2010 0.10
7/5/2010 0.38
7/6/2010
7/7/2010 0.30
7/8/2010 0.29
7/9/2010 0.05
7/10/2010
7/11/2010
7/12/2010
7/13/2010
7/14/2010
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010
7/21/2010
7/22/2010
7/23/2010
7/24/2010
7/25/2010
7/26/2010
7/27/2010
7/28/2010 0.11
7/29/2010 0.07
7/30/2010 0.12
7/31/2010
8/1/2010
8/2/2010 0.14
8/3/2010 0.12
8/4/2010
8/5/2010
8/6/2010
8/7/2010
8/8/2010
8/9/2010
8/10/2010 0.45
8/11/2010
8/12/2010
8/13/2010
8/14/2010
8/15/2010
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010
9/2/2010
9/3/2010
9/4/2010
9/5/2010
9/6/2010
9/7/2010
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010
9/13/2010
9/14/2010
9/15/2010
9/16/2010
9/17/2010
9/18/2010
9/19/2010
9/20/2010
9/21/2010
9/22/2010
9/23/2010
9/24/2010
9/25/2010
9/26/2010
9/27/2010
9/28/2010
9/29/2010
9/30/2010



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
10/2/2009 8:00 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 8:00 AM 0.02 M M M M light rain evening of 10/4, morning of 10/5
10/6/2009 8:00 AM 0.02 M M M M All Precip. before 4:30 PM on 10/5
10/7/2009 8:00 AM 0.00 0.0 M M M
10/8/2009 8:00 AM T M M M M
10/9/2009 8:00 AM 0.15 0.9 M 0.9 M freezing precip. morning of 10/8 gave way to light snow the rest of the day.
10/10/2009 8:00 AM 0.16 4.0 0.17 4.0 0.17 9 degrees Fahrenheit and snow with 4.2% SWE (super fluffy!) Snow from 10/9 observation melted before onset of new snow recorded on 10/10
10/11/2009 8:00 AM 0.02 T M 3.6 1.60 fog
10/12/2009 8:00 AM T M M M M fog
10/13/2009 8:00 AM T M M M M fog/dew
10/14/2009 7:00 AM 0.00 0.0 M M M
10/15/2009 7:00 AM 0.00 0.0 M M M
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 8:00 AM 0.32 2.0 0.19 2.0 0.19 started as fog, began snowing after midnight
10/22/2009 8:00 AM 0.08 0.5 0.08 2.3 0.26
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 8:00 AM 0.05 M M M M Very gusty winds on 10/24. Much fog AM 10/25.
10/26/2009 8:00 AM 0.20 2.3 0.20 2.3 0.20
10/27/2009 7:00 AM 0.00 0.0 M M M
10/28/2009 8:00 AM 0.93 11.2 0.93 11.2 0.93 17" as of 1:25PM 10/28/2009 1.2"/hr. during 8:55-->10:10PM 10/27 .6"/hr. during 12:00AM-->7:50AM 10/28
10/29/2009 8:00 AM 0.61 13.0 0.61 21.5 1.54 Very light fluffy snow 10/28 PM, gave way to very small granular snow on 10/29 AM. Much compaction of light snow observed (snow persisted, but total depths changed very little). 21.5" core was too messy to get a good core SWE for total depth. (assumed to be 1.54" SWE based on two days 'new' with temps always below zero C)
10/30/2009 8:00 AM T 1.0 M M M snow gauge messed with by 4 year old! No real data today...
10/31/2009 7:00 AM 0.00 0.0 M M M
11/1/2009 7:00 AM 0.00 0.0 M M M
11/2/2009 7:00 AM 0.00 0.0 M M M
11/3/2009 7:00 AM 0.00 0.0 M M M
11/4/2009 8:00 AM 0.00 0.0 M M M frost
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 8:00 AM 0.07 0.7 0.07 0.7 0.07
11/15/2009 8:00 AM 0.74 8.3 0.74 7.0 0.84
11/16/2009 8:00 AM 0.04 0.6 0.05 7.2 0.83
11/17/2009 8:00 AM 0.00 0.0 M 4.7 0.71
11/18/2009 7:00 AM 0.00 0.0 M M M
11/19/2009 7:00 AM 0.00 0.0 M M M
11/20/2009 7:00 AM 0.00 0.0 M M M
11/21/2009 7:00 AM 0.00 0.0 M M M
11/22/2009 7:00 AM 0.00 0.0 M M M
11/23/2009 7:00 AM 0.00 0.0 M M M
11/24/2009 7:00 AM 0.00 0.0 M M M
11/25/2009 7:00 AM 0.00 0.0 M M M
11/26/2009 7:00 AM 0.00 0.0 M M M
11/27/2009 7:00 AM 0.00 0.0 M M M
11/29/2009 8:00 AM T T T T T
12/1/2009 7:00 AM 0.00 0.0 M M M
12/2/2009 8:00 AM 0.25 5.8 0.25 5.8 0.25 9.5 degrees F at observation! 4.3% SWE
12/3/2009 8:00 AM 0.10 2.2 0.10 6.6 0.38
12/4/2009 8:00 AM T T T 6.0 0.37 lows around -2 degrees F New trace precip. most likely wind blown snow.
12/5/2009 7:00 AM 0.00 0.0 M M M
12/6/2009 8:00 AM 0.22 6.0 0.22 6.0 0.22
12/7/2009 8:00 AM 0.13 1.3 0.13 7.3 0.37
12/8/2009 8:00 AM 0.05 0.8 0.05 7.8 0.34
12/9/2009 8:00 AM 0.06 1.1 0.06 5.6 0.39
12/10/2009 8:00 AM T M M M M Wind blown snow, very windy
12/11/2009 7:00 AM 0.00 0.0 M M M
12/12/2009 7:00 AM 0.00 0.0 M M M
12/13/2009 7:00 AM 0.00 0.0 M M M
12/14/2009 7:00 AM 0.00 0.0 M M M
12/15/2009 7:00 AM 0.00 0.0 M M M
12/16/2009 7:00 AM 0.00 0.0 M M M
12/17/2009 7:00 AM 0.00 0.0 M M M
12/18/2009 7:00 AM 0.00 0.0 M M M
12/19/2009 7:00 AM 0.00 0.0 M M M
12/20/2009 7:00 AM 0.00 0.0 M M M
12/21/2009 7:00 AM 0.00 0.0 M M M
1/10/2010 7:00 AM 0.00 0.0 M M M
1/11/2010 7:00 AM 0.00 0.0 M M M
1/12/2010 8:00 AM 0.00 0.0 M M M
1/13/2010 7:00 AM 0.00 0.0 M M M
1/14/2010 7:00 AM 0.00 0.0 M M M
1/15/2010 7:00 AM 0.00 0.0 M M M
1/16/2010 7:00 AM 0.00 0.0 M M M
1/17/2010 7:00 AM 0.00 0.0 M M M
1/18/2010 8:00 AM T M M M M
1/19/2010 7:00 AM 0.00 0.0 M M M
1/20/2010 7:00 AM 0.00 0.0 M M M
1/21/2010 7:00 AM 0.00 0.0 M M M
1/22/2010 7:00 AM 0.00 0.0 M M M
1/23/2010 7:00 AM 0.00 0.0 M M M
1/24/2010 7:00 AM 0.00 0.0 M M M
1/25/2010 7:00 AM 0.00 0.0 M M M
1/26/2010 7:00 AM 0.00 0.0 M M 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 M M
2/3/2010 7:00 AM 0.00 0.0 M M M
2/4/2010 8:00 AM 0.01 0.4 0.01 0.4 0.01
2/5/2010 7:00 AM 0.00 0.0 M M M
2/6/2010 7:00 AM 0.00 0.0 M M M
2/7/2010 8:00 AM 0.07 1.3 0.07 1.3 0.07
2/8/2010 8:00 AM 0.19 2.7 0.19 3.5 0.24
2/9/2010 8:00 AM 0.04 2.0 0.04 4.7 0.29
4/22/2010 7:30 AM 1.33 M M M M Heavy rain/hail/lightning
4/23/2010 8:00 AM 0.88 M M M M mix rain/heavy snow
4/24/2010 8:00 AM 0.50 M M M M
4/26/2010 8:00 AM 0.62 M M M M
4/27/2010 8:00 AM 0.00 0.0 M M M
4/29/2010 8:00 AM 0.48 M M M M ~5-6" new snow, not specifically measured.
5/6/2010 8:00 AM 0.42 M M M M
6/12/2010 8:00 AM 1.90 M M M M
6/13/2010 8:00 AM 0.67 M M M M
7/3/2010 8:00 AM 0.10 M M M M
7/4/2010 8:00 AM 0.10 M M M M
7/5/2010 8:00 AM 0.38 M M M M
7/7/2010 8:00 AM 0.30 M M M M
7/8/2010 8:00 AM 0.29 M M M M
7/9/2010 8:00 AM 0.05 M M M M
7/28/2010 8:00 AM 0.11 M M M M
7/29/2010 8:00 AM 0.07 M M M M
7/30/2010 8:00 AM 0.12 M M M M
8/2/2010 8:00 AM 0.14 M M M M
8/3/2010 8:00 AM 0.12 M M M M
8/10/2010 8:00 AM 0.45 M M M M heavy rain/large fast moving T-storm



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