Station Overview Station Location
Station Number CO-BO-491 Latitude 40.02958
Station Name Boulder 1.8 W Longitude -105.28524
County Boulder Elevation (ft) 5427



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 18 1.33 0.31 6 0.31 6 0.00 0 0 1 1 0.0 0 0
Nov 18 1.04 1.19 30 1.19 30 0.00 0 0 6 2 16.0 3 8
Dec 18 0.80 0.00 25 0.00 25 0.00 0 0 0 5 0.7 1 2
Jan 19 0.63 0.86 25 0.86 25 0.00 0 0 7 1 9.9 6 9
Feb 19 0.66 0.54 28 0.54 28 0.00 0 0 5 4 10.3 6 5
March 19 1.85 2.05 26 2.05 26 0.00 0 0 9 1 13.2 6 6
April 19 2.33 1.04 22 0.40 19 0.64 3 1 4 1 2.8 1 1
May 19 2.76 3.94 28 3.65 26 0.29 2 1 14 3 4.4 2 2
June 19 2.55 2.71 26 2.52 24 0.19 2 1 10 0 0.0 0 0
July 19 1.67 2.34 30 2.34 30 0.00 0 0 13 4 0.0 0 0
Aug 19 1.88 0.32 31 0.32 31 0.00 0 0 6 2 0.0 0 0
Sept 19 1.45 0.78 26 0.78 26 0.00 0 0 6 0 0.0 0 0
Water Year Totals: 18.95" 16.08" 303 days 14.96" 296 1.12" 7 days 3 81 days 24 days 57.3" 25 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
10/1/2018 T
10/2/2018
10/3/2018
10/4/2018
10/5/2018
10/6/2018
10/7/2018
10/8/2018
10/9/2018
10/10/2018
10/11/2018
10/12/2018
10/13/2018
10/14/2018
10/15/2018
10/16/2018
10/17/2018
10/18/2018
10/19/2018
10/20/2018
10/21/2018
10/22/2018
10/23/2018
10/24/2018
10/25/2018
10/26/2018
10/27/2018 0.00
10/28/2018 0.00
10/29/2018 0.00
10/30/2018 0.00
10/31/2018 0.31
11/1/2018 0.00
11/2/2018 0.00
11/3/2018 0.14
11/4/2018 0.02
11/5/2018 0.00
11/6/2018 0.00
11/7/2018 0.00
11/8/2018 0.00
11/9/2018 0.00
11/10/2018 0.00
11/11/2018 0.42
11/12/2018 0.26
11/13/2018 0.00
11/14/2018 0.00
11/15/2018 0.00
11/16/2018 0.00
11/17/2018 0.03
11/18/2018 0.32
11/19/2018 0.00
11/20/2018 0.00
11/21/2018 0.00
11/22/2018 0.00
11/23/2018 0.00
11/24/2018 T
11/25/2018 T
11/26/2018 0.00
11/27/2018 0.00
11/28/2018 0.00
11/29/2018 0.00
11/30/2018 0.00
12/1/2018 0.00
12/2/2018
12/3/2018
12/4/2018
12/5/2018
12/6/2018 M
12/7/2018 T
12/8/2018 0.00
12/9/2018 0.00
12/10/2018 0.00
12/11/2018 0.00
12/12/2018 0.00
12/13/2018 0.00
12/14/2018 0.00
12/15/2018 0.00
12/16/2018 0.00
12/17/2018 0.00
12/18/2018 0.00
12/19/2018 0.00
12/20/2018 0.00
12/21/2018 0.00
12/22/2018 0.00
12/23/2018 0.00
12/24/2018 0.00
12/25/2018 0.00
12/26/2018 0.00
12/27/2018 T
12/28/2018 T
12/29/2018 T
12/30/2018
12/31/2018 T
Day of YearDaily PrcpMultiday Prcp
1/1/2019 0.17
1/2/2019 0.00
1/3/2019 0.00
1/4/2019 0.00
1/5/2019 0.00
1/6/2019 0.00
1/7/2019 0.00
1/8/2019 T
1/9/2019 0.00
1/10/2019 0.00
1/11/2019 0.14
1/12/2019
1/13/2019
1/14/2019
1/15/2019 0.00
1/16/2019 0.00
1/17/2019 0.00
1/18/2019 0.00
1/19/2019 0.20
1/20/2019
1/21/2019
1/22/2019
1/23/2019 0.00
1/24/2019 0.13
1/25/2019 0.02
1/26/2019 0.00
1/27/2019 0.00
1/28/2019 0.19
1/29/2019 0.01
1/30/2019 0.00
1/31/2019 0.00
2/1/2019 0.00
2/2/2019 0.00
2/3/2019 0.00
2/4/2019 0.00
2/5/2019 0.00
2/6/2019 T
2/7/2019 0.32
2/8/2019 0.00
2/9/2019 0.00
2/10/2019 0.00
2/11/2019 0.00
2/12/2019 0.00
2/13/2019 0.00
2/14/2019 0.00
2/15/2019 0.01
2/16/2019 0.00
2/17/2019 0.00
2/18/2019 0.05
2/19/2019 T
2/20/2019 T
2/21/2019 0.00
2/22/2019 0.03
2/23/2019 0.13
2/24/2019 0.00
2/25/2019 0.00
2/26/2019 0.00
2/27/2019 T
2/28/2019 0.00
3/1/2019 0.00
3/2/2019 0.12
3/3/2019 0.39
3/4/2019 0.08
3/5/2019 0.00
3/6/2019 0.00
3/7/2019 0.08
3/8/2019 0.00
3/9/2019 0.01
3/10/2019 0.00
3/11/2019 0.00
3/12/2019 T
3/13/2019 0.44
3/14/2019 0.77
3/15/2019 0.00
3/16/2019 0.00
3/17/2019 0.00
3/18/2019 0.00
3/19/2019 0.00
3/20/2019 0.00
3/21/2019 0.00
3/22/2019 0.00
3/23/2019 0.07
3/24/2019
3/25/2019
3/26/2019
3/27/2019
3/28/2019 0.00
3/29/2019 0.09
3/30/2019 M
3/31/2019 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2019 0.00
4/2/2019 0.00
4/3/2019 0.01
4/4/2019 0.00
4/5/2019 0.00
4/6/2019 0.00
4/7/2019 0.00
4/8/2019 0.00
4/9/2019 0.00
4/10/2019
4/11/2019
4/12/2019
4/13/2019
4/14/2019
4/15/2019
4/16/2019
4/17/2019
4/18/2019 0.02
4/19/2019 0.00
4/20/2019 0.00
4/21/2019 **
4/22/2019 **
4/23/2019 0.64
4/24/2019 0.00
4/25/2019 0.00
4/26/2019 0.00
4/27/2019 0.02
4/28/2019 0.00
4/29/2019 T
4/30/2019 0.35
5/1/2019 0.11
5/2/2019 0.05
5/3/2019 0.00
5/4/2019 0.00
5/5/2019 0.00
5/6/2019 0.00
5/7/2019 0.10
5/8/2019 0.27
5/9/2019 1.07
5/10/2019 0.05
5/11/2019 0.00
5/12/2019 0.00
5/13/2019 0.00
5/14/2019 T
5/15/2019
5/16/2019 T
5/17/2019 T
5/18/2019 0.20
5/19/2019 0.01
5/20/2019 0.24
5/21/2019 0.96
5/22/2019 0.02
5/23/2019 0.32
5/24/2019 0.11
5/25/2019 0.00
5/26/2019
5/27/2019 **
5/28/2019 0.29
5/29/2019 0.14
5/30/2019 0.00
5/31/2019
6/1/2019
6/2/2019
6/3/2019
6/4/2019 0.10
6/5/2019 0.00
6/6/2019 0.09
6/7/2019 0.01
6/8/2019 **
6/9/2019 0.19
6/10/2019 0.00
6/11/2019 0.00
6/12/2019 0.00
6/13/2019 0.00
6/14/2019 0.00
6/15/2019 0.00
6/16/2019 0.00
6/17/2019 0.25
6/18/2019 0.94
6/19/2019 0.02
6/20/2019 M
6/21/2019 0.00
6/22/2019 0.88
6/23/2019 0.21
6/24/2019 0.01
6/25/2019 0.00
6/26/2019 0.00
6/27/2019 0.00
6/28/2019 0.00
6/29/2019 0.01
6/30/2019 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2019 0.03
7/2/2019 0.97
7/3/2019 0.00
7/4/2019 0.00
7/5/2019 0.22
7/6/2019 0.30
7/7/2019 0.00
7/8/2019 0.05
7/9/2019 T
7/10/2019 0.00
7/11/2019 0.00
7/12/2019 0.00
7/13/2019 0.02
7/14/2019 0.00
7/15/2019 0.06
7/16/2019 0.06
7/17/2019 T
7/18/2019 0.00
7/19/2019 0.00
7/20/2019 0.00
7/21/2019 0.23
7/22/2019 0.37
7/23/2019 T
7/24/2019 0.00
7/25/2019 0.01
7/26/2019 T
7/27/2019
7/28/2019 0.01
7/29/2019 0.00
7/30/2019 0.00
7/31/2019 0.01
8/1/2019 0.00
8/2/2019 0.04
8/3/2019 0.01
8/4/2019 0.00
8/5/2019 0.00
8/6/2019 0.10
8/7/2019 0.00
8/8/2019 0.00
8/9/2019 0.15
8/10/2019 0.00
8/11/2019 0.00
8/12/2019 0.01
8/13/2019 0.00
8/14/2019 0.00
8/15/2019 0.00
8/16/2019 0.00
8/17/2019 T
8/18/2019 0.00
8/19/2019 0.00
8/20/2019 0.00
8/21/2019 T
8/22/2019 0.01
8/23/2019 0.00
8/24/2019 0.00
8/25/2019 0.00
8/26/2019 0.00
8/27/2019 0.00
8/28/2019 0.00
8/29/2019 0.00
8/30/2019 0.00
8/31/2019 0.00
9/1/2019 0.00
9/2/2019 0.00
9/3/2019 0.00
9/4/2019 0.00
9/5/2019 0.00
9/6/2019 0.01
9/7/2019 0.07
9/8/2019 0.00
9/9/2019 0.17
9/10/2019 0.00
9/11/2019 0.12
9/12/2019 0.16
9/13/2019 0.00
9/14/2019 0.00
9/15/2019 0.00
9/16/2019 0.00
9/17/2019
9/18/2019
9/19/2019
9/20/2019
9/21/2019 0.00
9/22/2019 0.00
9/23/2019 0.00
9/24/2019 0.00
9/25/2019 0.00
9/26/2019 0.00
9/27/2019 0.00
9/28/2019 0.25
9/29/2019 0.00
9/30/2019 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2018 8:00 AM T M M M M Fine mist for a short period in the morning
10/27/2018 8:00 AM 0.00 0.0 M M M
10/28/2018 8:00 AM 0.00 0.0 M M M
10/29/2018 8:00 AM 0.00 0.0 M M M
10/30/2018 8:00 AM 0.00 0.0 M M M
10/31/2018 8:00 AM 0.31 T M M M Snow on board was too icy and hard to core. The snow/ice on board measured 0.16" deep. Not enough snow on ground to core.
11/1/2018 8:00 AM 0.00 0.0 M 0.0 M
11/2/2018 8:00 AM 0.00 0.0 M M M
11/3/2018 8:00 AM 0.14 M M M M
11/4/2018 8:00 AM 0.02 0.0 M M M Water in gauge was frozen this morning. Yesterday small graupel fell a couple times during the day.
11/5/2018 8:00 AM 0.00 0.0 M M M
11/6/2018 8:00 AM 0.00 0.0 M M M
11/7/2018 8:00 AM 0.00 0.0 M M M
11/8/2018 8:00 AM 0.00 0.0 M M M
11/9/2018 8:00 AM 0.00 0.0 M M M
11/10/2018 8:00 AM 0.00 0.0 M M M
11/11/2018 8:00 AM 0.42 6.9 M M M This was the 1st snow I measured this year and forgot to core the board.
11/12/2018 8:00 AM 0.26 6.7 0.37 11.4 0.65 Flurrying this morning at measuring time.
11/13/2018 8:00 AM 0.00 0.0 M M M
11/14/2018 8:00 AM 0.00 0.0 M 4.8 0.62
11/15/2018 8:00 AM 0.00 0.0 M 1.3 0.48 Snow covers about 1/3 to 1/2 of the yard measuring 3.9" in a deeper area. The melted core value, not averaged, is entered below.
11/16/2018 8:00 AM 0.00 0.0 M M M
11/17/2018 8:00 AM 0.03 0.0 M T M There was a small amount of slush mixed in the water in the gauge. Currently light sleet falling.
11/18/2018 8:00 AM 0.32 2.4 0.30 3.5 0.23
11/19/2018 8:00 AM 0.00 0.0 M 2.4 0.29 Snow covered entire grass area but tapered off at edges. Measurements were taken at approx middle of grass area.
11/20/2018 8:00 AM 0.00 0.0 M 0.8 0.37
11/21/2018 8:00 AM 0.00 0.0 M 0.8 0.43 Accumulated snow measurements don't make sense relative to yesterday's, however, it is what it is. There is more grass area exposed so I would seem where I cooked happened to be deeper than yesterday.
11/22/2018 8:00 AM 0.00 0.0 M 0.6 0.32 Accumulated snow depth is average. Melted figure is at core, not average.
11/23/2018 8:00 AM 0.00 0.0 M T M
11/24/2018 8:00 AM T 0.0 M T M
11/25/2018 8:00 AM T M M 0.0 M Very very light fine spray of precipitation in the afternoon
11/26/2018 8:00 AM 0.00 0.0 M 0.0 M
11/27/2018 8:00 AM 0.00 0.0 M 0.0 M
11/28/2018 8:00 AM 0.00 0.0 M M M
11/29/2018 8:00 AM 0.00 0.0 M 0.0 M
11/30/2018 8:00 AM 0.00 0.0 M M M
12/1/2018 8:00 AM 0.00 0.0 M 0.0 M
12/6/2018 8:30 AM M 0.7 0.03 2.0 0.08
12/7/2018 8:00 AM T T M 1.5 0.05
12/8/2018 8:00 AM 0.00 0.0 M M M
12/9/2018 8:00 AM 0.00 0.0 M M M
12/10/2018 8:00 AM 0.00 0.0 M T M
12/11/2018 8:00 AM 0.00 0.0 M M M
12/12/2018 8:00 AM 0.00 0.0 M M M
12/13/2018 8:00 AM 0.00 0.0 M M M
12/14/2018 8:00 AM 0.00 0.0 M M M
12/15/2018 8:00 AM 0.00 0.0 M M M
12/16/2018 8:00 AM 0.00 0.0 M M M
12/17/2018 8:00 AM 0.00 0.0 M M M
12/18/2018 8:00 AM 0.00 0.0 M M M
12/19/2018 8:00 AM 0.00 0.0 M M M
12/20/2018 8:00 AM 0.00 0.0 M M M
12/21/2018 8:00 AM 0.00 0.0 M M M
12/22/2018 8:00 AM 0.00 0.0 M M M
12/23/2018 8:00 AM 0.00 0.0 M 0.0 M
12/24/2018 8:00 AM 0.00 0.0 M M M
12/25/2018 8:00 AM 0.00 0.0 M M M
12/26/2018 8:00 AM 0.00 0.0 M M M
12/27/2018 8:00 AM T 0.0 M 0.0 M
12/28/2018 8:00 AM T 0.0 M 0.0 M
12/29/2018 8:00 AM T 0.0 M 0.0 M
12/31/2018 8:00 AM T T M M M Started to snow several minutes ago. Now snowing moderately, large flakes.
1/1/2019 8:00 AM 0.17 2.8 0.18 3.9 0.16 Snow depth on ground is to solid ground, no deduction for depth of grass.
1/2/2019 8:00 AM 0.00 0.0 M M M
1/3/2019 8:00 AM 0.00 0.0 M M M
1/4/2019 8:00 AM 0.00 0.0 M M M
1/5/2019 8:00 AM 0.00 0.0 M M M
1/6/2019 8:00 AM 0.00 0.0 M M M
1/7/2019 8:00 AM 0.00 0.0 M M M
1/8/2019 8:00 AM T 0.0 M 0.0 M A few flakes around mid day. No accumulation.
1/9/2019 8:00 AM 0.00 0.0 M M M
1/10/2019 8:00 AM 0.00 0.0 M M M
1/11/2019 7:30 AM 0.14 0.0 M 0.0 M
1/15/2019 9:00 AM 0.00 0.0 M 1.5 0.45
1/16/2019 8:30 AM 0.00 0.0 M 0.4 0.07 Yard was about 1/3 covered by snow.
1/17/2019 8:30 AM 0.00 0.0 M M M
1/18/2019 8:30 AM 0.00 0.0 M T M
1/19/2019 9:00 AM 0.20 0.8 0.12 1.6 0.14 Precipitation started around 9:00AM, starting as rain and sleet then changing to snow.
1/23/2019 8:30 AM 0.00 0.0 M T M
1/24/2019 8:30 AM 0.13 2.5 0.13 5.3 0.20 At the bottom of ground core was a thin layer of grapple. The snow on top of that was light. Total snow includes grass depth, core was taken where there was no old snow.
1/25/2019 8:30 AM 0.02 0.5 0.03 3.9 0.35 Precipitation in tube was ice.
1/26/2019 8:30 AM 0.00 0.0 M 2.8 0.34 Cumulative snow on ground was from 1/2" to 5" deep. Average is reported. However, the core location was taken at the deeper side.
1/27/2019 9:00 AM 0.00 0.0 M M M
1/28/2019 8:30 AM 0.19 3.1 0.20 5.1 0.49 Moderate snow falling, about 21°f. Cumulative snow fall varied from 3.9" to 6.3". FYI, you probably know taking and melting so many cores takes quite a bit of time, an hour passed when i finished.
1/29/2019 8:30 AM 0.01 0.2 M M M Snow stopped early in measuring period. This morning there was light cloud cover, 13°F air temperature. Ice crystals covered the gauge and crystals were growing out from wood post on which gauge was mounted.
1/30/2019 8:00 AM 0.00 0.0 M M M
1/31/2019 8:30 AM 0.00 0.0 M 2.4 0.34 Clear blue sky, 32°F. Snow depth in shade measured 4.7". At edges of grass and at hard surfaced areas snow depth was 0". Figures given for cumulative snow are average.
2/1/2019 8:00 AM 0.00 0.0 M M M
2/2/2019 8:00 AM 0.00 0.0 M M M
2/3/2019 8:00 AM 0.00 0.0 M M M
2/4/2019 8:00 AM 0.00 0.0 M M M
2/5/2019 8:30 AM 0.00 0.0 M T M Old snow remains in areas under deep shade.
2/6/2019 8:30 AM T T M T M Snow is in the form of very small graupel, I think, and a very sparse scattering of it.
2/7/2019 8:30 AM 0.32 4.5 0.32 5.6 0.30 Mostly clear sky, sunny, -1°F. Snow is light, fluffy. The day began with small pellets of snow and sometime between 9:00am and 9:30am snow started to come down more heavily in clusters of flakes. It snowed continuously during day light hours. I didn't note when it stopped
2/8/2019 8:30 AM 0.00 0.0 M M M Mostly cloudy, light cloud cover, 3°F.
2/9/2019 8:00 AM 0.00 0.0 M M M
2/10/2019 8:00 AM 0.00 0.0 M M M
2/11/2019 8:00 AM 0.00 0.0 M M M
2/12/2019 8:00 AM 0.00 0.0 M M M
2/13/2019 8:00 AM 0.00 0.0 M M M
2/14/2019 8:00 AM 0.00 0.0 M M M
2/15/2019 8:30 AM 0.01 0.1 M T M Snow is small clusters, about 1/16" diameter, of crystals. On the ground snow is between grass blades, difficult to measure a depth. Trace amount of snow from previous snowfall. Light cloud cover, 22°F
2/16/2019 8:30 AM 0.00 0.0 M T M
2/17/2019 8:00 AM 0.00 0.0 M M M
2/18/2019 8:30 AM 0.05 2.5 0.06 3.7 0.05 Heavily Overcast sky, snowing lightly. 8°F
2/19/2019 9:00 AM T 0.6 T 2.3 0.03 Light flurries, heavily overcast sky, 12°F. Small loose clusters of snow flakes.
2/20/2019 8:30 AM T T M M M
2/21/2019 8:30 AM 0.00 0.0 M T M
2/22/2019 8:30 AM 0.03 0.8 0.04 1.5 0.02 Heavily Overcast sky, very light snow flurries, no wind, 20°F
2/23/2019 8:30 AM 0.13 1.8 0.12 3.1 0.14 Light cloud cover with clear areas, sunny, 25°, calm.
2/24/2019 8:00 AM 0.00 0.0 M M M
2/25/2019 8:00 AM 0.00 0.0 M M M
2/26/2019 8:00 AM 0.00 0.0 M M M
2/27/2019 8:30 AM T T M T M Accumulated snow remains on the ground where there is deep shade. The sky is a consistent gray, what I call heavily overcast. 14°F
2/28/2019 8:00 AM 0.00 0.0 M M M
3/1/2019 8:00 AM 0.00 0.0 M M M
3/2/2019 9:00 AM 0.12 1.9 0.12 3.1 0.12
3/3/2019 9:30 AM 0.39 4.3 0.40 6.2 0.51 5°F, mostly cloudy
3/4/2019 8:30 AM 0.08 1.1 0.08 5.9 0.62 Mostly clear sky, 2°F, still.
3/5/2019 8:00 AM 0.00 0.0 M M M
3/6/2019 8:00 AM 0.00 0.0 M M M
3/7/2019 8:30 AM 0.08 0.2 0.08 3.4 0.65 Heavily Overcast sky, 24°F, still air. Precipitation on ground is small ice balls, sleet.
3/8/2019 8:00 AM 0.00 0.0 M M M
3/9/2019 12:00 PM 0.01 0.0 M T M It rained yesterday evening. (Forgot to check gauge this morning.) Snow remains on the ground only where there is deep shade.
3/10/2019 8:00 AM 0.00 0.0 M M M
3/11/2019 8:30 AM 0.00 0.0 M T M
3/12/2019 8:30 AM T 0.0 M T M There was brief rain yesterday afternoon. A very small amount of snow remains on the ground in deep shade Mostly sunny, 32°F
3/13/2019 8:30 AM 0.44 0.0 M T M Heavy overcast sky, moderate to heavy steady rain, 35°F. Very small patches of old snow, now mostly ice, remains on the ground.
3/14/2019 8:30 AM 0.77 1.8 0.37 3.2 0.36 Heavily Overcast sky, 26°F, calm. Precipitation in gauge is solid ice. Rain changed to snow sometime before 10:00AM when air temperature was 33°F. Heavy snow changed yo very light snow and ended around 16:15.
3/15/2019 8:00 AM 0.00 0.0 M M M
3/16/2019 8:00 AM 0.00 0.0 M M M
3/17/2019 8:00 AM 0.00 0.0 M M M
3/18/2019 8:00 AM 0.00 0.0 M M M
3/19/2019 8:00 AM 0.00 0.0 M M M
3/20/2019 8:00 AM 0.00 0.0 M M M
3/21/2019 8:00 AM 0.00 0.0 M M M
3/22/2019 8:30 AM 0.00 0.0 M 0.0 M
3/23/2019 7:00 AM 0.07 0.0 M 0.0 M 34°F, calm
3/28/2019 8:00 AM 0.00 0.0 M M M
3/29/2019 8:30 AM 0.09 0.0 M 0.0 M 36°F, light drizzle, heavy overcast sky
3/30/2019 8:30 AM M 3.9 0.46 6.1 0.35 I forgot to remove the funnel & small tube from gauge therefore did get a measurement for total precipitation in gauge. However, the gauge did capture .09" of water before snow clogged the funnel.
3/31/2019 8:30 AM 0.00 0.0 M T M
4/1/2019 8:00 AM 0.00 0.0 M M M
4/2/2019 8:00 AM 0.00 0.0 M M M
4/3/2019 8:30 AM 0.01 0.0 M 0.0 M
4/4/2019 8:00 AM 0.00 0.0 M M M
4/5/2019 8:00 AM 0.00 0.0 M M M
4/6/2019 8:00 AM 0.00 0.0 M M M
4/7/2019 8:00 AM 0.00 0.0 M M M
4/8/2019 8:00 AM 0.00 0.0 M M M
4/9/2019 8:00 AM 0.00 0.0 M M M
4/18/2019 8:30 AM 0.02 0.0 M 0.0 M
4/19/2019 8:00 AM 0.00 0.0 M M M
4/20/2019 8:00 AM 0.00 0.0 M M M
4/24/2019 8:00 AM 0.00 0.0 M M M
4/25/2019 8:00 AM 0.00 0.0 M M M
4/26/2019 8:00 AM 0.00 0.0 M M M
4/27/2019 8:30 AM 0.02 0.0 M 0.0 M
4/28/2019 8:00 AM 0.00 0.0 M M M
4/29/2019 8:30 AM T 0.0 M 0.0 M Yesterday there was very light spray.
4/30/2019 8:30 AM 0.35 2.8 0.32 3.5 0.22 Heavy overcast sky. In the time passed waiting for gauge and cored snow to melt it visually appeared the snow outside was melting quickly. By the time I finished measurements it was 34°F, around 9:45AM. (Forgot to note temperature when starting measurements, at 8:30AM.)
5/1/2019 8:30 AM 0.11 0.0 M 0.0 M It snowed yesterday but no snow remained on the ground this morning. 34°F, heavily overcast sky, calm. I can see fog at the top of foothills.
5/2/2019 8:30 AM 0.05 0.0 M 0.0 M 36°F, partly sunny, calm
5/3/2019 8:00 AM 0.00 0.0 M M M
5/4/2019 8:00 AM 0.00 0.0 M M M
5/5/2019 8:00 AM 0.00 0.0 M M M
5/6/2019 8:00 AM 0.00 0.0 M M M
5/7/2019 8:30 AM 0.10 0.0 M 0.0 M 44°F, heavy overcast sky, calm
5/8/2019 8:30 AM 0.27 0.0 M 0.0 M 41°F, steady moderate rainfall, heavily overcast, calm
5/9/2019 8:30 AM 1.07 1.6 0.45 3.9 0.32 32°F, snowing lightly, overcast, calm, light to moderate rain all day until around 10:30PM when rain changed to sleet or snow. Accumulated snow is heavy.
5/10/2019 8:30 AM 0.05 0.0 M 0.0 M 36°F, overcast sky with lightness in East and fog over foothills, calm
5/11/2019 8:00 AM 0.00 0.0 M M M
5/12/2019 8:00 AM 0.00 0.0 M M M
5/13/2019 8:00 AM 0.00 0.0 M M M
5/14/2019 8:00 AM T 0.0 M 0.0 M
5/16/2019 8:30 AM T 0.0 M 0.0 M
5/17/2019 8:30 AM T 0.0 M 0.0 M
5/18/2019 8:30 AM 0.20 0.0 M 0.0 M Precipitation began with slushy hail. There was damage to tender leaves ofgarden vegetable plants. No damage seen on perennials. 48°F, heavily overcast sky, calm.
5/19/2019 8:30 AM 0.01 0.0 M M M The measured water may have been from condensation.
5/20/2019 8:45 AM 0.24 0.0 M 0.0 M 34°F, light drizzle, heavily overcast sky, calm
5/21/2019 8:30 AM 0.96 2.8 0.70 4.4 0.53 ?°, heavily overcast sky, calm. rain changed to snow sometime before 21:30. Trees and shrubs are bent over weighted by heavy wet snow. A neighbor's tree lost a large branch, 6-8" diameter. Almost no snow accumulation on pavement.
5/22/2019 8:30 AM 0.02 0.0 M T M 37°F, heavily overcast sky but brighter, calm.
5/23/2019 8:30 AM 0.32 0.0 M 0.0 M 36°F, steady light rain, calm. Foothills are shrouded in thick.fog making them invisible, even their bases.
5/24/2019 8:30 AM 0.11 0.0 M 0.0 M 49°F, partly cloudy, moderate breeze. Around 6:30 AM ice was observed on top of deck rail, no plant damage from freezing.
5/25/2019 8:30 AM 0.00 0.0 M 0.0 M
5/29/2019 8:30 AM 0.14 0.0 M 0.0 M A few snow flakes we're seen at approximately 19:30 near 13th St and Mapleton Ave. in Boulder
5/30/2019 8:30 AM 0.00 0.0 M 0.0 M
6/4/2019 8:30 AM 0.10 0.0 M 0.0 M
6/5/2019 8:00 AM 0.00 0.0 M M M
6/6/2019 8:30 AM 0.09 M M M M
6/7/2019 8:30 AM 0.01 M M M M
6/10/2019 8:00 AM 0.00 0.0 M M M
6/11/2019 8:00 AM 0.00 0.0 M M M
6/12/2019 8:00 AM 0.00 0.0 M M M
6/13/2019 8:00 AM 0.00 0.0 M M M
6/14/2019 8:30 AM 0.00 0.0 M M M
6/15/2019 8:30 AM 0.00 0.0 M M M
6/16/2019 8:30 AM 0.00 0.0 M M M
6/17/2019 8:30 AM 0.25 0.0 M M M
6/18/2019 8:30 AM 0.94 0.0 M M M Hail for about 30 minutes after rain started. Very heavy rain.
6/19/2019 8:30 AM 0.02 0.0 M M M
6/20/2019 8:30 AM M M M M M
6/21/2019 8:30 AM 0.00 0.0 M M M
6/22/2019 8:30 AM 0.88 0.0 M M M
6/23/2019 8:30 AM 0.21 0.0 M M M
6/24/2019 8:30 AM 0.01 0.0 M M M
6/25/2019 8:00 AM 0.00 0.0 M M M
6/26/2019 8:00 AM 0.00 0.0 M M M
6/27/2019 8:00 AM 0.00 0.0 M M M
6/28/2019 8:00 AM 0.00 0.0 M M M
6/29/2019 8:30 AM 0.01 M M M M
6/30/2019 8:30 AM 0.00 0.0 M M M
7/1/2019 8:30 AM 0.03 M M M M
7/2/2019 8:30 AM 0.97 M M M M 62°F, clear sky, calm
7/3/2019 8:00 AM 0.00 0.0 M M M
7/4/2019 8:30 AM 0.00 0.0 M M M
7/5/2019 8:30 AM 0.22 M M M M Small hail started at 7:40pm ending within 6 minutes. See hail report. This morning 62°F, mostly cloudy, calm.
7/6/2019 8:30 AM 0.30 M M M M
7/7/2019 8:30 AM 0.00 0.0 M M M
7/8/2019 8:30 AM 0.05 M M M M 65°F, mostly sunny, calm. Rain occurred in the night.
7/9/2019 8:30 AM T M M M M
7/10/2019 8:00 AM 0.00 0.0 M M M
7/11/2019 8:00 AM 0.00 0.0 M M M
7/12/2019 8:00 AM 0.00 0.0 M M M
7/13/2019 8:30 AM 0.02 M M M M Rained large drops spaced far apart for a few minutes yesterday late afternoon. Currently, 65°F, cloudless sky, light breeze.
7/14/2019 8:00 AM 0.00 0.0 M M M
7/15/2019 8:30 AM 0.06 M M M M Clear sky, calm, warm
7/16/2019 8:30 AM 0.06 M M M M 65°F, mostly cloudy, calm
7/17/2019 8:30 AM T M M M M
7/18/2019 8:30 AM 0.00 0.0 M M M 73°F, mostly sunny with light clouds, calm
7/19/2019 8:30 AM 0.00 0.0 M M M 77°F, clear sky, calm
7/20/2019 8:00 AM 0.00 0.0 M M M
7/21/2019 8:30 AM 0.23 M M M M 65°F, clear sky, calm
7/22/2019 8:30 AM 0.37 M M M M 64°F, heavy overcast, calm
7/23/2019 8:30 AM T M M M M
7/24/2019 8:00 AM 0.00 0.0 M M M
7/25/2019 8:30 AM 0.01 M M M M 73°F, mostly cloudy, calm
7/26/2019 8:30 AM T 0.0 M 0.0 M Thursday evening it sprinkled lightly for a few minutes. Now it's 66°F mostly sunny, calm.
7/28/2019 8:30 AM 0.01 M M M M Dead fly in the gauge may have affected level which read a little over .01. rained lightly in the afternoon for a few minutes and again a little after 22:00.
7/29/2019 8:00 AM 0.00 0.0 M M M
7/30/2019 8:00 AM 0.00 0.0 M M M
7/31/2019 8:30 AM 0.01 M M M M Tuesday at 17:30 got on my bike. The sky was dark but not raining at home, however, I could see rain over Chautauqua. About half way into the trip it started to rain initially lightly and became very heavy about 2/3 into the trip to 29th street mall. When I arrived it was about 17:45 and raining buckets. Apparently it hardly rained at home.
8/1/2019 8:00 AM 0.00 0.0 M M M
8/2/2019 8:30 AM 0.04 0.0 M M M Rain started after 22:00, maybe closer to 23:00, sprinkled lightly. Didn't notice when it stopped.
8/3/2019 8:30 AM 0.01 0.0 M M M There was rain in mid afternoon, sprinkled lightly for a brief time. Air temperature dropped some when it rained.
8/4/2019 8:00 AM 0.00 0.0 M M M
8/5/2019 8:00 AM 0.00 0.0 M M M
8/6/2019 8:30 AM 0.10 0.0 M M M
8/7/2019 8:00 AM 0.00 0.0 M M M
8/8/2019 8:00 AM 0.00 0.0 M M M
8/9/2019 8:00 AM 0.15 0.0 M M M
8/10/2019 8:00 AM 0.00 0.0 M M M
8/11/2019 8:00 AM 0.00 0.0 M M M
8/12/2019 8:00 AM 0.01 0.0 M M M
8/13/2019 8:00 AM 0.00 0.0 M M M
8/14/2019 8:00 AM 0.00 0.0 M M M
8/15/2019 8:00 AM 0.00 0.0 M M M
8/16/2019 8:00 AM 0.00 0.0 M M M
8/17/2019 8:00 AM T 0.0 M M M Around 16:15 there were a few rain drops widely spaced and very brief.
8/18/2019 8:00 AM 0.00 0.0 M M M
8/19/2019 8:00 AM 0.00 0.0 M M M
8/20/2019 8:00 AM 0.00 0.0 M M M
8/21/2019 8:00 AM T M M M M As discussed walked between my car and house around 21:00 I felt a very few small rain drops.
8/22/2019 8:00 AM 0.01 M M M M
8/23/2019 8:00 AM 0.00 0.0 M M M Yesterday evening, around 19:45 I was at pearl St and 10th, where there were a light sprinkling of rain for a few minutes.
8/24/2019 8:00 AM 0.00 0.0 M M M
8/25/2019 8:00 AM 0.00 0.0 M M M
8/26/2019 8:00 AM 0.00 0.0 M M M
8/27/2019 8:00 AM 0.00 0.0 M M M
8/28/2019 8:00 AM 0.00 0.0 M M M
8/29/2019 8:00 AM 0.00 0.0 M M M
8/30/2019 8:00 AM 0.00 0.0 M M M As I was bicycling east on glenwood at 23rd st it started to rain at around 16:10. Rain drops were largish, widely spaced. By the time I got to 30th St it stopped at around 16:15
8/31/2019 8:00 AM 0.00 0.0 M M M
9/1/2019 8:00 AM 0.00 0.0 M M M
9/2/2019 8:00 AM 0.00 0.0 M M M
9/3/2019 8:00 AM 0.00 0.0 M M M
9/4/2019 8:00 AM 0.00 0.0 M M M
9/5/2019 8:00 AM 0.00 0.0 M M M
9/6/2019 8:00 AM 0.01 0.0 M M M
9/7/2019 8:00 AM 0.07 M M M M I actually made an accumulated measurment, not 2 dailies. The accumulated amount for 9/5 and 9/6 was .08". I was unable to delete the erroneous entry made for 9/5 so estimated the amount of rain for 9/5 as .01 and .07 for 9/6.
9/8/2019 8:00 AM 0.00 0.0 M M M
9/9/2019 8:00 AM 0.17 0.0 M M M
9/10/2019 8:00 AM 0.00 0.0 M M M
9/11/2019 8:00 AM 0.12 0.0 M M M
9/12/2019 8:00 AM 0.16 0.0 M M M While driving at baseline Rd and Arapahoe at 17:33 precipitation started with small hail mixed with rain. Hail stopped and rain became very heavy within 3 minutes.
9/13/2019 8:00 AM 0.00 0.0 M M M
9/14/2019 8:00 AM 0.00 0.0 M M M
9/15/2019 8:00 AM 0.00 0.0 M M M
9/16/2019 8:00 AM 0.00 0.0 M M M
9/21/2019 8:00 AM 0.00 0.0 M M M
9/22/2019 8:00 AM 0.00 0.0 M M M
9/23/2019 8:00 AM 0.00 0.0 M M M
9/24/2019 8:00 AM 0.00 0.0 M M M
9/25/2019 8:00 AM 0.00 0.0 M M M
9/26/2019 8:00 AM 0.00 0.0 M M M
9/27/2019 8:00 AM 0.00 0.0 M M M
9/28/2019 8:00 AM 0.25 M M M M It rained moderately and steadily at least until I went to sleep.
9/29/2019 8:00 AM 0.00 0.0 M M M Lots of condensation on the gauge this morning.
9/30/2019 8:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
4/21/2019 4/23/2019 8:30 AM 3 0.64 0.0 M Mostly sunny sky, 43°F, calm
5/27/2019 5/28/2019 8:30 AM 2 0.29 0.0 0.00
6/8/2019 6/09/2019 8:30 AM 2 0.19 0.0 M



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
6/17/2019 2:15 PM 3/8" Rice Rice 30 10min minor leaf damage Continuous True After rain After smaller hail
6/21/2019 10:09 PM 1/4" Pea Size 1/4" Pea Size Rice White Ice 4 1min minor leaf damage Continuous True After rain
7/4/2019 7:40 PM 3/8" 1/4" Pea Size Rice White Ice 6 1min minor leaf damage.shredded leaves Intermittent True After rain Same time as smaller hail 58 1.5
7/5/2019 7:11 PM NA NA NA Hard 12 minor leaf damage Continuous True After rain Same time as smaller hail 33