Station Overview Station Location
Station Number CO-BO-67 Latitude 39.999614
Station Name Boulder 4.7 E Longitude -105.179377
County Boulder Elevation (ft) 5325



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 1.31 1.81 31 1.81 31 0.00 0 0 6 1 9.1 2 5
Nov 11 1.00 0.89 30 0.89 30 0.00 0 0 2 2 9.6 2 5
Dec 11 0.70 1.95 31 1.95 31 0.00 0 0 8 0 32.8 8 31
Jan 12 0.57 0.36 31 0.36 31 0.00 0 0 5 0 7.9 5 19
Feb 12 0.54 1.73 29 1.73 29 0.00 0 0 6 5 30.7 9 22
March 12 1.80 0.00 31 0.00 31 0.00 0 0 0 5 0.0 0 0
April 12 2.13 1.09 28 1.09 28 0.00 0 0 7 1 1.7 2 0
May 12 2.38 1.61 23 1.61 23 0.00 0 0 6 1 0.0 0 0
June 12 1.84 0.12 24 0.12 24 0.00 0 0 5 5 0.0 0 0
July 12 1.68 2.46 29 2.46 29 0.00 0 0 13 3 0.0 0 0
Aug 12 1.64 0.12 27 0.12 27 0.00 0 0 5 4 0.0 0 0
Sept 12 1.40 0.81 13 0.81 13 0.00 0 0 6 0 0.0 0 0
Water Year Totals: 16.99" 12.95" 327 days 12.95" 327 0.00" 0 days 0 69 days 27 days 91.8" 28 days 82 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 0.04
10/6/2011 0.00
10/7/2011 0.00
10/8/2011 0.05
10/9/2011 0.35
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 0.01
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 1.06
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 0.87
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 0.00
11/27/2011 0.00
11/28/2011 0.00
11/29/2011 0.00
11/30/2011 0.00
12/1/2011 0.46
12/2/2011 0.18
12/3/2011 0.22
12/4/2011 0.07
12/5/2011 0.01
12/6/2011 0.00
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 0.06
12/21/2011 0.00
12/22/2011 0.90
12/23/2011 0.05
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 0.00
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 0.06
1/9/2012 0.00
1/10/2012 0.00
1/11/2012 0.00
1/12/2012 0.19
1/13/2012 0.00
1/14/2012 0.00
1/15/2012 0.00
1/16/2012 0.00
1/17/2012 0.05
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 0.04
1/26/2012 0.00
1/27/2012 0.00
1/28/2012 0.02
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 0.98
2/4/2012 0.40
2/5/2012 T
2/6/2012 0.00
2/7/2012 0.11
2/8/2012 T
2/9/2012 0.00
2/10/2012 0.00
2/11/2012 0.06
2/12/2012 T
2/13/2012 0.00
2/14/2012 0.00
2/15/2012 0.00
2/16/2012 0.00
2/17/2012 0.00
2/18/2012 T
2/19/2012 0.00
2/20/2012 0.03
2/21/2012 0.00
2/22/2012 0.00
2/23/2012 0.15
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 0.00
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 0.00
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
4/2/2012
4/3/2012 0.11
4/4/2012 0.30
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 0.14
4/13/2012 0.00
4/14/2012 0.00
4/15/2012 0.46
4/16/2012 0.04
4/17/2012 0.00
4/18/2012 0.00
4/19/2012 0.00
4/20/2012 0.01
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 0.03
4/28/2012 0.00
4/29/2012 0.00
4/30/2012 0.00
5/1/2012 0.00
5/2/2012
5/3/2012
5/4/2012 0.00
5/5/2012 0.00
5/6/2012 0.00
5/7/2012 0.44
5/8/2012 0.32
5/9/2012 0.00
5/10/2012 0.00
5/11/2012 0.00
5/12/2012 0.10
5/13/2012
5/14/2012 0.00
5/15/2012 0.00
5/16/2012 0.00
5/17/2012 T
5/18/2012 0.00
5/19/2012 0.06
5/20/2012 0.12
5/21/2012 0.00
5/22/2012 0.00
5/23/2012 0.00
5/24/2012 0.57
5/25/2012 0.00
5/26/2012 0.00
5/27/2012
5/28/2012
5/29/2012
5/30/2012
5/31/2012
6/1/2012
6/2/2012
6/3/2012
6/4/2012 0.05
6/5/2012 0.00
6/6/2012 T
6/7/2012 T
6/8/2012 T
6/9/2012
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 0.01
6/16/2012 T
6/17/2012 T
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 0.03
6/28/2012
6/29/2012
6/30/2012 0.02
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 0.02
7/7/2012 0.28
7/8/2012 1.26
7/9/2012 0.08
7/10/2012 0.25
7/11/2012 0.00
7/12/2012 0.00
7/13/2012
7/14/2012
7/15/2012 0.00
7/16/2012 0.00
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 0.01
7/23/2012 T
7/24/2012 0.03
7/25/2012 0.08
7/26/2012 T
7/27/2012 0.00
7/28/2012 0.01
7/29/2012 T
7/30/2012 0.11
7/31/2012 0.13
8/1/2012 0.00
8/2/2012 0.03
8/3/2012 0.04
8/4/2012 0.00
8/5/2012 0.00
8/6/2012 0.00
8/7/2012
8/8/2012 0.00
8/9/2012 0.00
8/10/2012 0.00
8/11/2012 0.02
8/12/2012 0.01
8/13/2012 0.00
8/14/2012 0.00
8/15/2012 T
8/16/2012 0.00
8/17/2012 0.00
8/18/2012
8/19/2012 0.00
8/20/2012 0.00
8/21/2012 T
8/22/2012 0.00
8/23/2012 0.02
8/24/2012 0.00
8/25/2012
8/26/2012
8/27/2012 0.00
8/28/2012 0.00
8/29/2012 T
8/30/2012 T
8/31/2012 0.00
9/1/2012
9/2/2012 0.02
9/3/2012
9/4/2012
9/5/2012
9/6/2012
9/7/2012 0.03
9/8/2012 0.06
9/9/2012
9/10/2012
9/11/2012
9/12/2012
9/13/2012
9/14/2012
9/15/2012
9/16/2012
9/17/2012
9/18/2012
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 0.32
9/27/2012 0.31
9/28/2012 0.07
9/29/2012
9/30/2012



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2011 7:00 AM 0.00 0.0 M 0.0 M
10/2/2011 7:00 AM 0.00 0.0 M 0.0 M
10/3/2011 7:00 AM 0.00 0.0 M 0.0 M
10/4/2011 7:00 AM 0.00 0.0 M 0.0 M
10/5/2011 7:00 AM 0.04 0.0 M 0.0 M late afternoon showers
10/6/2011 7:00 AM 0.00 0.0 M 0.0 M
10/7/2011 7:00 AM 0.00 0.0 M 0.0 M May have been a trace in the afternoon but not there to see it. Wind died down overnight and dropped to 32. Too dry for frost but did have ~0.1" thick ice in the birdbath. Appears to be only marginal if any damage to uncovered garden plants.
10/8/2011 7:00 AM 0.05 0.0 M 0.0 M at 0700 38 (also the low) with very light rain
10/9/2011 7:00 AM 0.35 T M 0.0 M Mainly R- fell until the rain increased ~1100, when it mixed with big snow flakes. Mixed rain and snow (never any accumulation) fell until ~1230, then back to mostly R-, ocnl R in the early afternoon until rain ended about 1530 with partial clearing. Clouded back over with more R- 2200-probably after midnight. Clearing by morning with low of 33 and light frost on the roof.
10/10/2011 7:00 AM T 0.0 M 0.0 M Some sprinkles ~1700-2000, clearing after midnight with a low of 32, frost on the roofs and porch, very thin ice in the bird bath.
10/11/2011 7:00 AM 0.00 0.0 M 0.0 M
10/12/2011 7:00 AM 0.00 0.0 M 0.0 M
10/13/2011 7:00 AM 0.00 0.0 M 0.0 M
10/14/2011 7:00 AM 0.00 0.0 M 0.0 M
10/15/2011 7:00 AM 0.00 0.0 M 0.0 M
10/16/2011 7:00 AM 0.00 0.0 M 0.0 M
10/17/2011 7:00 AM 0.00 0.0 M 0.0 M
10/18/2011 7:00 AM 0.01 0.0 M 0.0 M Overnight low of 31 with frost on the roofs and lawn. Was 34 at 10pm but clouds came in by ~midnight.
10/19/2011 7:00 AM 0.00 0.0 M 0.0 M coldest night so far with a low of 26
10/20/2011 7:00 AM 0.00 0.0 M 0.0 M low of 32, even though 36 at 10pm
10/21/2011 7:00 AM 0.00 0.0 M 0.0 M
10/22/2011 7:00 AM 0.00 0.0 M 0.0 M
10/23/2011 7:00 AM 0.00 0.0 M 0.0 M
10/24/2011 7:00 AM 0.00 0.0 M 0.0 M
10/25/2011 7:00 AM 0.00 0.0 M 0.0 M
10/26/2011 7:00 AM 1.06 6.9 M 7.0 M Used surrounding stations for amounts
10/27/2011 7:00 AM 0.30 2.2 M 7.0 M Used surrounding stations for amounts
10/28/2011 7:00 AM 0.00 0.0 M 5.0 M Used surrounding stations for snow depth
10/29/2011 7:00 AM 0.00 0.0 M 3.0 M Used surrounding stations for snow depth
10/30/2011 7:00 AM 0.00 0.0 M 1.0 M Used surrounding stations for snow depth
10/31/2011 7:00 AM 0.00 0.0 M T M Used surrounding stations for snow depth
11/1/2011 7:00 AM 0.00 0.0 M T M Used surrounding stations for snow depth
11/2/2011 7:00 AM 0.87 9.3 M 8.5 M Started mostly as snow with R-- at times 630pm, then mixed with rain and snow pellets and thunder came down hard at times 645-~815pm (all snow by~730pm, but not much had accumulated beyond ~0.2" by 730pm). As of 10pm back to S- with 0.31" and 1.6" of snow. Then must have been S=~11-2am as by 230am had another ~7" or so. Mostly S- after 230am. Total new snow after 10pm 7.7" with 0.56" melted. (edit: daily precip initially recorded as 5.87". changed to 0.87" due to comments above. P.G.)
11/3/2011 7:00 AM 0.02 0.3 M 6.0 M storm total was 9.6". S- pretty much over by 1000. Low of 12.
11/4/2011 7:00 AM 0.00 0.0 M 4.0 M
11/5/2011 7:00 AM 0.00 0.0 M 2.0 M Used surrounding stations for snow depth
11/6/2011 7:00 AM 0.00 0.0 M 1.0 M Used surrounding stations for snow depth
11/7/2011 7:00 AM 0.00 0.0 M T M Used surrounding stations for snow depth
11/8/2011 7:00 AM 0.00 0.0 M T M Still a solid 2-4" in the shady areas, generally little or nothing elsewhere.
11/9/2011 7:00 AM 0.00 0.0 M T M still a good 3" of snow in the shady areas
11/10/2011 7:00 AM 0.00 0.0 M T M About 2.5" in shady areas
11/11/2011 7:00 AM 0.00 0.0 M T M About 2" in the shade.
11/12/2011 7:00 AM 0.00 0.0 M T M about an inch of snow left in the shade
11/13/2011 7:00 AM 0.00 0.0 M T M just some patches of snow now left in the shade
11/14/2011 7:00 AM T 0.0 M 0.0 M A brief rain shower around 8pm. All snow now melted in the shade.
11/15/2011 7:00 AM 0.00 0.0 M 0.0 M
11/16/2011 7:00 AM 0.00 0.0 M 0.0 M
11/17/2011 7:00 AM 0.00 0.0 M 0.0 M
11/18/2011 7:00 AM 0.00 0.0 M 0.0 M
11/19/2011 7:00 AM T T M T M A solid dusting of snow but not quite measurable (0.1")
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 0.0 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 0.0 M
11/24/2011 7:00 AM 0.00 0.0 M 0.0 M
11/25/2011 7:00 AM 0.00 0.0 M 0.0 M
11/26/2011 7:00 AM 0.00 0.0 M 0.0 M
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 0.0 M
11/29/2011 7:00 AM 0.00 0.0 M 0.0 M
11/30/2011 7:00 AM 0.00 0.0 M 0.0 M
12/1/2011 7:00 AM 0.46 6.0 M 6.0 M S- began around midnight, only a dusting by 1am, but then ~1" new by 2am and ~2" total new by 3am.
12/2/2011 7:00 AM 0.18 3.0 M 7.0 M snow ended during the afternoon. Then another dusting late at night with some fog.
12/3/2011 7:00 AM 0.22 5.8 M 10.5 M S= and 20 at 0700. S-- began ~9pm, only a dusting at 1030pm.
12/4/2011 7:00 AM 0.07 2.0 M 9.0 M 1.8" between 0700-0915 then another 0.2" by 1200 when last flurries ended.
12/5/2011 7:00 AM 0.01 0.7 M 8.0 M S- began about 4pm, 0.1" by 5pm, basically over by 9pm. Low of -3
12/6/2011 7:00 AM 0.00 0.0 M 6.5 M low of -10
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 estimated snow depth
12/9/2011 7:00 AM 0.00 0.0 M 5.0 M estimated snow depth
12/10/2011 7:00 AM 0.00 0.0 M 4.5 M estimated snow depth
12/11/2011 7:00 AM 0.00 0.0 M 4.5 M estimated snow depth
12/12/2011 7:00 AM 0.00 0.0 M 4.0 M
12/13/2011 7:00 AM 0.00 0.0 M 4.0 M
12/14/2011 7:00 AM 0.00 0.0 M 4.0 M
12/15/2011 7:00 AM 0.00 0.0 M 4.0 M about 6" in the shade
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 6" in the shade
12/18/2011 7:00 AM 0.00 0.0 M 3.5 M about 6" in the shade
12/19/2011 7:00 AM 0.00 0.0 M 3.0 M still 6" left in the shade
12/20/2011 7:00 AM 0.06 0.8 M 3.5 M snow began around 1000, ended by 1800, mainly S-.
12/21/2011 7:00 AM 0.00 0.0 M 3.0 M About 6.5" left in the shade
12/22/2011 7:00 AM 0.90 13.2 M 16.0 M Close to 20" in shady areas on the ground. Snow began ~1630, 1.2"/0.05" at 1850, another 2.3"/0.14" at 2100, then another 5.4"/0.33" at 0130, and another 4.3"/0.38" by 0700. S- and 21 at 0700.
12/23/2011 7:00 AM 0.05 1.3 M 13.0 M snow mostly ended by 1100, dusting after that. Low of +2
12/24/2011 7:00 AM 0.00 0.0 M 11.0 M still 16" in the shade. low of 11
12/25/2011 7:00 AM 0.00 0.0 M 10.5 M about 15.5" in the shade
12/26/2011 7:00 AM 0.00 0.0 M 10.0 M 15" in the shade
12/27/2011 7:00 AM 0.00 0.0 M 9.0 M around 13" in the shade
12/28/2011 7:00 AM 0.00 0.0 M 7.5 M about 11" in the shade
12/29/2011 7:00 AM 0.00 0.0 M 7.0 M estimated snow depth
12/30/2011 7:00 AM 0.00 0.0 M 6.0 M estimated snow depth
12/31/2011 7:00 AM 0.00 0.0 M 5.0 M estimated snow depth
1/1/2012 7:00 AM 0.00 0.0 M 4.0 M snow cover variable - few bare spots in the sun but general 2-5" snow cover, 6-7" in the shade. Distant open fields mostly bare.
1/2/2012 7:00 AM 0.00 0.0 M 4.0 M hi of only 32 so no melting sunday. still 5-7" in the shade.
1/3/2012 7:00 AM 0.00 0.0 M 3.5 M Some bare spots and generally 1.5-5" in the sun, 5-7" in the shade.
1/4/2012 7:00 AM 0.00 0.0 M 3.0 M snow cover highly variable. Bare spots in the sun (distant fields all or mostly bare) but general cover of 1-4", with 5-7" in the shade.
1/5/2012 7:00 AM 0.00 0.0 M 2.5 M snow cover remains highly variable, from some bare spots to 7" in the shade
1/6/2012 7:00 AM 0.00 0.0 M 1.0 M Bare areas in the sunny sections, still 3 to 6" in the shade with good cover
1/7/2012 7:00 AM 0.00 0.0 M 1.0 M bare areas in the sun, solid 3-6" in the shade
1/8/2012 7:00 AM 0.06 0.6 M 1.5 M SW- began about 3pm, steady S- to ocnl S ~330 to ~5pm, then S- till about 6pm. only a dusting after 6pm and snow pretty much over by 630pm
1/9/2012 7:00 AM 0.00 0.0 M 1.0 M still about 6" in the shade
1/10/2012 7:00 AM 0.00 0.0 M 1.0 M Still a very solid snow cover in the back yard, 1 to 6". Bare areas in the sun.
1/11/2012 7:00 AM 0.00 0.0 M 1.0 M S-- by 0715, may have begun a little earlier but didn't see it. Snow cover from old snow quite variable; large bare areas in the sun but 2-5" over a large area of the back yard.
1/12/2012 7:00 AM 0.19 5.0 M 4.0 M snow began right around 0700, last flakes fell around 1900. Depth settled over night with the fluffy snow.
1/13/2012 7:00 AM 0.00 0.0 M 3.0 M
1/14/2012 7:00 AM 0.00 0.0 M 2.0 M
1/15/2012 7:00 AM 0.00 0.0 M 0.5 M
1/16/2012 7:00 AM 0.00 0.0 M 0.5 M About 50% snow cover in the sun, but solid 2-6" yet in the less sunny areas.
1/17/2012 7:00 AM 0.05 1.5 M 1.5 M Lots of snow settling overnight despite cold. A few snow grains and maybe even rain drops (with a temp around 30) around 2pm, then S- began about 415pm. Most of the accumulation (1.4") done by 8pm, but still S-- at 11pm.
1/18/2012 7:00 AM 0.00 0.0 M 1.0 M
1/19/2012 7:00 AM 0.00 0.0 M 0.5 M not much snow in the sunny areas but solid cover in the back yard.
1/20/2012 7:00 AM 0.00 0.0 M T M Considerable snow melt over the last couple of days with the warm nighttime temps and wind. Pretty much all gone in the sun and in the shade down to an average of 2" with few bare spots.
1/21/2012 7:00 AM 0.00 0.0 M T M some snow left in the shade
1/22/2012 7:00 AM 0.00 0.0 M T M some snow left in the shade
1/23/2012 7:00 AM 0.00 0.0 M T M some snow left in the shade
1/24/2012 7:00 AM 0.00 0.0 M T M some snow left in the shade
1/25/2012 7:00 AM 0.04 0.2 M T M Report estimated from nearby stations.
1/26/2012 7:00 AM 0.00 0.0 M T M
1/27/2012 7:00 AM 0.00 0.0 M T M
1/28/2012 7:00 AM 0.02 0.6 M T M
1/29/2012 7:00 AM 0.00 0.0 M T M
1/30/2012 7:00 AM 0.00 0.0 M T M Just a little snow left in the shade, likely to disappear today
1/31/2012 7:00 AM 0.00 0.0 M 0.0 M all the snow is gone, even the small amount in the shade.
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 0.98 13.0 M 12.0 M Melted the first 3" and got 0.25" liguid. Snow began 620pm, 3.0" by 10pm, another 10 overnight with 0.73". Lots of drifting, at least 18" drifts. S- and 25 at 0700 but now S again at 0750.
2/4/2012 7:00 AM 0.40 9.1 M 18.0 M Storm total now up to 22.1"/1.38" Measurements: 13.0/0.98 start (1820/2 Feb) to 0700/3 Feb, then 1.0/0.07" 0700-1200, stopped ~1200-~1430, then 1.5/0.04" 1430-1730, and another 4.8/0.20" 1730-2200, then another 1.8/0.07". Season total now >80"
2/5/2012 7:00 AM T 0.2 M 13.0 M Low of 7. S- to S-- with some huge flakes from 0700 until about 0930. Final total was 22.3" and 1.38" melted.
2/6/2012 7:00 AM 0.00 0.0 M 12.0 M
2/7/2012 7:00 AM 0.11 3.3 M 14.0 M Few flurries ~1900-2200 then snow increased, over 2" by ~0300. Still S- and 19 at 0700.
2/8/2012 7:00 AM T 0.3 M 13.0 M Could have been more snow but left house around 0915 and that is when 0.3" of fluff was measured. Off and on S- much of the day.
2/9/2012 7:00 AM 0.00 0.0 M 11.0 M
2/10/2012 7:00 AM 0.00 0.0 M 10.0 M
2/11/2012 7:00 AM 0.06 2.4 M 12.0 M
2/12/2012 7:00 AM T T M 11.0 M snowfall estimated from surrounding sites. Snow depth estimated
2/13/2012 7:00 AM 0.00 0.0 M 10.0 M snow depth estimated
2/14/2012 7:00 AM 0.00 0.0 M 8.0 M snow depth estimated
2/15/2012 7:00 AM 0.00 0.0 M 7.0 M snow depth estimated
2/16/2012 7:00 AM 0.00 0.0 M 6.0 M
2/17/2012 7:00 AM 0.00 0.0 M 6.0 M
2/18/2012 7:00 AM T 0.2 M 6.0 M A period of light snow between 5 and and about 7pm, very fluffy.
2/19/2012 7:00 AM 0.00 0.0 M 5.0 M
2/20/2012 7:00 AM 0.03 0.6 M 5.5 M snow began after 11pm but before midnight, pretty much all had fallen by ~1am with S- then that soon ended.
2/21/2012 7:00 AM 0.00 0.0 M 5.0 M
2/22/2012 7:00 AM 0.00 0.0 M 4.0 M Low of only 41 with occasional wind from the west. Snow cover getting more variable, a few bare spots showing up, more in the shade.
2/23/2012 7:00 AM 0.15 1.6 M 2.0 M Appeared to be a rain shower sometime after 11pm but before 2am (Trace), then S to S+ at 230am, suspect most of the snow was done by 3am or so. Lots of melting during the day, large bare areas with about 4" cover left in the shade.
2/24/2012 7:00 AM T T M 1.0 M Some flurries in the morning and possible aftn as well. about 3-6" of snow depth in the shade.
2/25/2012 7:00 AM 0.00 0.0 M T M
2/26/2012 7:00 AM 0.00 0.0 M T M No snow left in any sunny areas but a solid 3" of dense stuff in large patches in the shade
2/27/2012 7:00 AM 0.00 0.0 M T M no snow in the sun, but solid patches of 2-4" in the shade, my yard and all around the neighborhood.
2/28/2012 7:00 AM 0.00 0.0 M T M still 1-4" areas of snow left in the shade.
2/29/2012 7:00 AM 0.00 0.0 M T M
3/1/2012 7:00 AM 0.00 0.0 M T M patches of snow remain in the shade but took a hit yesterday; now generally trace to 2.5"
3/2/2012 7:00 AM T T M T M brief period of snow mid morning
3/3/2012 7:00 AM T T M T M snow shower between 5-630pm, may have been others during the day.
3/4/2012 7:00 AM 0.00 0.0 M T M
3/5/2012 7:00 AM 0.00 0.0 M T M
3/6/2012 7:00 AM 0.00 0.0 M T M still a little snow left in the shade.
3/7/2012 7:00 AM T T M T M Freezing drizzle with occasional snow flakes estimated to have begun a little before 6am. Left a thin coating of ice on the porch. Still a bit of old snow left in the shade.
3/8/2012 7:00 AM T T M T M Some freezing drizzle, believe only in the morning. Still a little snow left in the shade.
3/9/2012 7:00 AM 0.00 0.0 M T M A diminishing bit of snow in the shade, probably the last day.
3/10/2012 7:00 AM 0.00 0.0 M T M just a little snow left in the shade
3/11/2012 7:00 AM 0.00 0.0 M 0.0 M last of the snow in the shade gone with a high of 69
3/12/2012 7:00 AM T 0.0 M 0.0 M some off and on R-/R-- 0700-1000
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 0.0 M
3/19/2012 7:00 AM 0.00 0.0 M 0.0 M may have been a trace around 5pm but not there and saw no evidence of it
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
4/3/2012 7:00 AM 0.11 0.2 M T M Not sure what fell in the day before 1900, but no precip was in the gage so a trace at most. Occasional drizzle with a few snow flakes/grains at times mixed in began by 1930 then increased by 2200, with 0.01" by 2300. Over to all snow by 0400.
4/4/2012 7:00 AM 0.30 1.5 M T M 0700-0900: snowed 1.1"/0.17 0900-1600: liquid of 0.08" Suspect snow kept melting as it fell, but driving out to Louisville at 335pm snow increase east of Boulder to moderate, now S- to S that has accumulated new of 0.2" on table. 1600-1700 0.04/0.1" wet snow, then another 0.01/T snow until quick end at 1730. Storm total to 4pm of 1.7" snow with 0.41" liquid.
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 some sprinkles around 7pm
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 low of 27
4/9/2012 7:00 AM 0.00 0.0 M 0.0 M low of 29
4/10/2012 7:00 AM 0.00 0.0 M 0.0 M
4/11/2012 7:00 AM 0.00 0.0 M 0.0 M
4/12/2012 7:00 AM 0.14 0.0 M 0.0 M thunderstorm! thunder began ~1030 with ocnl R- then some heavier rain by ~1100pm. not sure when it ended.
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 0.46 0.0 M 0.0 M report estimated based on surrounding stations and 2 day gage total of 0.50". Not sure if there was any snow at the end of the precip late Sat night.
4/16/2012 7:00 AM 0.04 0.0 M 0.0 M report estimated based on surrounding stations and 2 day gage total of 0.50".
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 0.01 0.0 M 0.0 M Brief tstm around 2pm
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
4/26/2012 7:00 AM 0.00 0.0 M 0.0 M
4/27/2012 7:00 AM 0.03 0.0 M 0.0 M few sprinkles around 615pm, then showers with some distant lightning and gusty winds at times ~900-10pm (0.02") with a few showers and another 0.01" after that.
4/28/2012 7:00 AM 0.00 0.0 M 0.0 M
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
5/4/2012 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 0.44 0.0 M 0.0 M report based on nearby CoCoRaHS report
5/8/2012 7:00 AM 0.32 0.0 M 0.0 M report based on a nearby CoCoRaHS station
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 0.10 0.0 M 0.0 M
5/14/2012 7:00 AM 0.00 0.0 M 0.0 M
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 T 0.0 M 0.0 M few sprinkles around 6pm
5/18/2012 7:00 AM 0.00 0.0 M 0.0 M
5/19/2012 7:00 AM 0.06 0.0 M 0.0 M saw lightning around 8-10pm, but rain began after midnight and over by 0700
5/20/2012 7:00 AM 0.12 0.0 M 0.0 M a few sprinkles 0700-1000 then period of R- 1000-noon with 0.02". A shower with harder rain about 1500-1600 dropped 0.10" Cleared off with a low of 37.
5/21/2012 7:00 AM 0.00 0.0 M 0.0 M
5/22/2012 7:00 AM 0.00 0.0 M 0.0 M
5/23/2012 7:00 AM 0.00 0.0 M 0.0 M hi of 92
5/24/2012 7:00 AM 0.57 0.0 M 0.0 M 0.56" of it fell between ~4pm and 10pm, with thunder ~8-9pm. 0.01" after midnight some time.
5/25/2012 7:00 AM 0.00 0.0 M 0.0 M
5/26/2012 7:00 AM 0.00 0.0 M 0.0 M
6/4/2012 7:00 AM 0.05 0.0 M 0.0 M
6/5/2012 7:00 AM 0.00 0.0 M 0.0 M
6/6/2012 7:00 AM T 0.0 M 0.0 M some sprinkles off and on between about 345-430pm
6/7/2012 7:00 AM T 0.0 M 0.0 M hours of off and on thunder and some sprinkles or R-- and R- from 530pm until about 830pm, then lightning in sight until at least 11pm.
6/8/2012 7:00 AM T 0.0 M 0.0 M some light showers late morning between about 1100am - noon.
6/10/2012 7:00 AM 0.00 0.0 M 0.0 M
6/11/2012 7:00 AM 0.00 0.0 M 0.0 M
6/12/2012 7:00 AM 0.00 0.0 M 0.0 M quite smoky this morning, can definitely smell it.
6/13/2012 7:00 AM 0.00 0.0 M 0.0 M
6/14/2012 7:00 AM 0.00 0.0 M 0.0 M
6/15/2012 7:00 AM 0.01 0.0 M 0.0 M off and on sprinkles from ~6-830pm with a little thunder around 7pm, with a trace. then overnight around 2-3 am a thunderstorm with some R- dropped 0.01"
6/16/2012 7:00 AM T 0.0 M 0.0 M an early start with sprinkles a little after noon until about 2pm, with some thunder briefly around 1pm.
6/17/2012 7:00 AM T 0.0 M 0.0 M Another period of sprinkles mid afternoon with a cell mainly well south.
6/18/2012 7:00 AM 0.00 0.0 M 0.0 M Hi of 99
6/19/2012 7:00 AM 0.00 0.0 M 0.0 M high of 101 a very warm low of 67
6/20/2012 7:00 AM 0.00 0.0 M 0.0 M saw a few drops in Boulder ~930pm but no evidence here of anything
6/21/2012 7:00 AM 0.00 0.0 M 0.0 M
6/22/2012 7:00 AM 0.00 0.0 M 0.0 M
6/23/2012 7:00 AM 0.00 0.0 M 0.0 M
6/24/2012 7:00 AM 0.00 0.0 M 0.0 M Hi of 104
6/25/2012 7:00 AM 0.01 0.0 M 0.0 M a tstm with some gusty winds in the early evening.
6/26/2012 7:00 AM 0.00 0.0 M 0.0 M Hi of 103. 4th day in a row at or above 100
6/27/2012 7:00 AM 0.03 0.0 M 0.0 M Thunder began shortly after noon, with some drops by ~1230, then period of showers with some big drops until close to 1400 (0.03" from this). No real wind until the end (around 1400). Then another period of thunder with occasional sprinkles and some gusty winds from ~1900-2030, with a trace. Overnight low was a warm 68. But the high ONLY 96 (ending a streak of 4 days aob 100).
6/30/2012 7:00 AM 0.02 0.0 M 0.0 M a brief tstm around 530pm
7/1/2012 7:00 AM 0.00 0.0 M 0.0 M thunder from ~4-430pm but never saw a drop of rain.
7/2/2012 7:00 AM 0.00 0.0 M 0.0 M some thunder at 11am, then less cloudiness during the afternoon. High of 102.
7/3/2012 7:00 AM 0.11 0.0 M 0.0 M Thunderstorm with actual rain ~730-830pm
7/4/2012 7:00 AM 0.00 0.0 M 0.0 M lots of clouds and wind at times but no rain. However, for first time in awhile high < 90 (only 88!).
7/5/2012 7:00 AM 0.00 0.0 M 0.0 M
7/6/2012 7:00 AM 0.02 0.0 M 0.0 M estimate based on nearby reports
7/7/2012 7:00 AM 0.28 0.0 M 0.0 M estimate based on nearby reports
7/8/2012 7:00 AM 1.26 0.0 M 0.0 M Heavy downpour around 530pm, by 830pm still steady rain and had gotten 0.92. Another good burst of rain w/o thunder around 10pm.
7/9/2012 7:00 AM 0.08 0.0 M 0.0 M only 0.04" in the heavy tstm around 630pm that dumped >2" about 8 miles away in W Boulder. Another 0.04" after midnight.
7/10/2012 7:00 AM 0.25 0.0 M 0.0 M tropical like showers with no thunder from ~0730 through late morning. Cleared as the afternoon went on.
7/11/2012 7:00 AM 0.00 0.0 M 0.0 M
7/12/2012 7:00 AM 0.00 0.0 M 0.0 M
7/15/2012 7:00 AM 0.00 0.0 M 0.0 M
7/16/2012 7:00 AM 0.00 0.0 M 0.0 M
7/17/2012 7:00 AM 0.09 0.0 M 0.0 M Heavy downpour at NOAA ~420pm dropped only 0.08" by ~6pm at my house, then some R- around 10pm.
7/18/2012 7:00 AM 0.00 0.0 M 0.0 M off and on thunder ~1730-1815. May have been some sprinkles but not home.
7/19/2012 7:00 AM 0.00 0.0 M 0.0 M
7/20/2012 7:00 AM 0.00 0.0 M 0.0 M thunder off and on from ~1745 to ~1915
7/21/2012 7:00 AM 0.00 0.0 M 0.0 M
7/22/2012 7:00 AM 0.01 0.0 M 0.0 M thunder began ~1845 as storm moved up from the south, tiny period of real rain but mostly ocnl R- with thunder, all ended by ~1945.
7/23/2012 7:00 AM T 0.0 M 0.0 M trace based on surrounding obs
7/24/2012 7:00 AM 0.03 0.0 M 0.0 M Evening tstm with a lot of wind
7/25/2012 7:00 AM 0.08 0.0 M 0.0 M long period of lightning beginning around 830pm gradually got closer, finally a tstm began around 1015pm with some R at times, ended before midnight.
7/26/2012 7:00 AM T 0.0 M 0.0 M some sprinkles in the afternoon
7/27/2012 7:00 AM 0.00 0.0 M 0.0 M
7/28/2012 7:00 AM 0.01 0.0 M 0.0 M about 3.5 h of thunder from ~1145-~1515 but only 0.01" with sprinkles noon - ~3pm then a period of R- to R--. Another period of R- in the evening for a trace.
7/29/2012 7:00 AM T 0.0 M 0.0 M Estimated from nearby reports
7/30/2012 7:00 AM 0.11 0.0 M 0.0 M Estimated from nearby reports (and my 2-day total)
7/31/2012 7:00 AM 0.13 0.0 M 0.0 M Estimated from nearby reports (and my 2-day total)
8/1/2012 7:00 AM 0.00 0.0 M 0.0 M
8/2/2012 7:00 AM 0.03 0.0 M 0.0 M late afternoon tstsm, then a trace of rain in a shower near 2100.
8/3/2012 7:00 AM 0.04 0.0 M 0.0 M another late afternoon tstm
8/4/2012 7:00 AM 0.00 0.0 M 0.0 M
8/5/2012 7:00 AM 0.00 0.0 M 0.0 M
8/6/2012 7:00 AM 0.00 0.0 M 0.0 M After a refreshing low of 52 sunday am was back to 94.
8/8/2012 7:00 AM 0.00 0.0 M 0.0 M
8/9/2012 7:00 AM 0.00 0.0 M 0.0 M
8/10/2012 7:00 AM 0.00 0.0 M 0.0 M
8/11/2012 7:00 AM 0.02 0.0 M 0.0 M evening shower, after 7pm, done by 10pm; not sure if there was thunder
8/12/2012 7:00 AM 0.01 0.0 M 0.0 M
8/13/2012 7:00 AM 0.00 0.0 M 0.0 M
8/14/2012 7:00 AM 0.00 0.0 M 0.0 M
8/15/2012 7:00 AM T 0.0 M 0.0 M Appeared to be storms just to the north but hard to see through the smoke. A few sprinkles did fall around 630pm.
8/16/2012 7:00 AM 0.00 0.0 M 0.0 M
8/17/2012 7:00 AM 0.00 0.0 M 0.0 M may have been some sprinkles but not around to see. Cooler was nice but disappointing lack of precip. Low of 45 this morning.
8/19/2012 7:00 AM 0.00 0.0 M 0.0 M
8/20/2012 7:00 AM 0.00 0.0 M 0.0 M
8/21/2012 7:00 AM T 0.0 M 0.0 M some big drops and gusty winds with a 3-5 min shower around 745pm.
8/22/2012 7:00 AM 0.00 0.0 M 0.0 M
8/23/2012 7:00 AM 0.02 0.0 M 0.0 M some R- around 10-11pm for a trace, then a period of R- later.
8/24/2012 7:00 AM 0.00 0.0 M 0.0 M
8/27/2012 7:00 AM 0.00 0.0 M 0.0 M
8/28/2012 7:00 AM 0.00 0.0 M 0.0 M
8/29/2012 7:00 AM T 0.0 M 0.0 M a brief shower around 730pm
8/30/2012 7:00 AM T 0.0 M 0.0 M a few sprinkles very late afternoon
8/31/2012 7:00 AM 0.00 0.0 M 0.0 M
9/2/2012 7:00 AM 0.02 0.0 M 0.0 M a shower around noon then a tstm around 2-230pm
9/7/2012 7:00 AM 0.03 0.0 M 0.0 M R- overnight beginning about 1030pm
9/8/2012 7:00 AM 0.06 0.0 M 0.0 M off and on showers (maybe some thunder too at times) during the afternoon.
9/19/2012 7:00 AM 0.00 0.0 M 0.0 M
9/20/2012 7:00 AM 0.00 0.0 M 0.0 M
9/21/2012 7:00 AM 0.00 0.0 M 0.0 M
9/22/2012 7:00 AM 0.00 0.0 M 0.0 M
9/23/2012 7:00 AM 0.00 0.0 M 0.0 M
9/24/2012 7:00 AM 0.00 0.0 M 0.0 M
9/25/2012 7:00 AM 0.00 0.0 M 0.0 M
9/26/2012 7:00 AM 0.32 0.0 M 0.0 M showers began late afternoon, some thunder 8-9pm then rain after 9pm well into the night.
9/27/2012 7:00 AM 0.31 0.0 M 0.0 M 0.01" by 7pm with late day storms, then 0.29" between about 8-1030pm with some thunder at times. 0.01" after 1030pm with most rain over by midnight or so.
9/28/2012 7:00 AM 0.07 0.0 M 0.0 M Afternoon shower, then another sprinkle (T) around 8pm



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