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 17 1.33 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 17 1.04 0.09 18 0.09 18 0.00 0 0 2 0 0.0 0 0
Dec 17 0.80 0.78 31 0.78 31 0.00 0 0 4 5 9.0 7 8
Jan 18 0.63 0.00 4 0.00 4 0.00 0 0 0 1 0.0 0 0
Feb 18 0.66 0.98 17 0.98 17 0.00 0 0 6 1 14.7 7 9
March 18 1.85 1.85 28 1.85 28 0.00 0 0 5 0 3.8 2 2
April 18 2.33 1.21 30 1.21 30 0.00 0 0 6 0 5.3 3 1
May 18 2.76 4.08 26 1.97 22 2.11 4 2 7 1 0.0 0 0
June 18 2.55 2.29 28 2.29 28 0.00 0 0 6 0 0.0 0 0
July 18 1.67 1.75 29 1.75 29 0.00 0 0 9 5 0.0 0 0
Aug 18 1.88 0.35 24 0.35 24 0.00 0 0 3 1 0.0 0 0
Sept 18 1.45 0.95 17 0.95 17 0.00 0 0 3 4 0.0 0 0
Water Year Totals: 18.95" 14.33" 252 days 12.22" 248 2.11" 4 days 2 51 days 18 days 32.8" 19 days 20 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
10/1/2017
10/2/2017
10/3/2017
10/4/2017
10/5/2017
10/6/2017
10/7/2017
10/8/2017
10/9/2017
10/10/2017
10/11/2017
10/12/2017
10/13/2017
10/14/2017
10/15/2017
10/16/2017
10/17/2017
10/18/2017
10/19/2017
10/20/2017
10/21/2017
10/22/2017
10/23/2017
10/24/2017
10/25/2017
10/26/2017
10/27/2017
10/28/2017
10/29/2017
10/30/2017
10/31/2017
11/1/2017
11/2/2017
11/3/2017
11/4/2017
11/5/2017
11/6/2017
11/7/2017
11/8/2017
11/9/2017
11/10/2017
11/11/2017
11/12/2017 0.00
11/13/2017 0.00
11/14/2017 0.00
11/15/2017 0.00
11/16/2017 0.00
11/17/2017 0.00
11/18/2017 0.06
11/19/2017 0.00
11/20/2017 0.00
11/21/2017 0.00
11/22/2017 0.03
11/23/2017 0.00
11/24/2017
11/25/2017 0.00
11/26/2017 0.00
11/27/2017 0.00
11/28/2017 0.00
11/29/2017 0.00
11/30/2017 0.00
12/1/2017 0.00
12/2/2017 0.00
12/3/2017 0.00
12/4/2017 0.00
12/5/2017 0.00
12/6/2017 0.00
12/7/2017 0.00
12/8/2017 0.00
12/9/2017 0.00
12/10/2017 0.00
12/11/2017 0.00
12/12/2017 0.00
12/13/2017 0.00
12/14/2017 0.26
12/15/2017 0.00
12/16/2017 0.00
12/17/2017 T
12/18/2017 0.00
12/19/2017 0.00
12/20/2017 0.00
12/21/2017 0.23
12/22/2017 0.03
12/23/2017 0.00
12/24/2017 0.26
12/25/2017 0.00
12/26/2017 T
12/27/2017 T
12/28/2017 0.00
12/29/2017 0.00
12/30/2017 T
12/31/2017 T
Day of YearDaily PrcpMultiday Prcp
1/1/2018 T
1/2/2018 0.00
1/3/2018 0.00
1/4/2018 0.00
1/5/2018
1/6/2018
1/7/2018
1/8/2018
1/9/2018
1/10/2018
1/11/2018
1/12/2018
1/13/2018
1/14/2018
1/15/2018
1/16/2018
1/17/2018
1/18/2018
1/19/2018
1/20/2018
1/21/2018
1/22/2018
1/23/2018
1/24/2018
1/25/2018
1/26/2018
1/27/2018
1/28/2018
1/29/2018
1/30/2018
1/31/2018
2/1/2018
2/2/2018
2/3/2018
2/4/2018
2/5/2018
2/6/2018
2/7/2018
2/8/2018 0.00
2/9/2018 0.00
2/10/2018 0.12
2/11/2018 0.08
2/12/2018 T
2/13/2018 M
2/14/2018 0.00
2/15/2018 0.00
2/16/2018 0.06
2/17/2018 0.00
2/18/2018 0.00
2/19/2018 0.06
2/20/2018 0.47
2/21/2018 0.00
2/22/2018 0.00
2/23/2018 0.00
2/24/2018 0.19
2/25/2018 0.00
2/26/2018
2/27/2018
2/28/2018
3/1/2018 0.00
3/2/2018 0.00
3/3/2018 0.00
3/4/2018 0.00
3/5/2018 0.00
3/6/2018 0.00
3/7/2018 0.00
3/8/2018 0.00
3/9/2018 0.00
3/10/2018 0.00
3/11/2018 0.00
3/12/2018 0.00
3/13/2018 0.00
3/14/2018 0.00
3/15/2018
3/16/2018
3/17/2018 0.00
3/18/2018 0.00
3/19/2018 0.61
3/20/2018 0.00
3/21/2018 0.00
3/22/2018 0.00
3/23/2018 0.00
3/24/2018 0.00
3/25/2018
3/26/2018 0.07
3/27/2018 0.59
3/28/2018 0.00
3/29/2018 0.43
3/30/2018 0.15
3/31/2018 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2018 0.05
4/2/2018 0.00
4/3/2018 0.00
4/4/2018 0.00
4/5/2018 0.00
4/6/2018 0.00
4/7/2018 0.48
4/8/2018 0.00
4/9/2018 0.09
4/10/2018 0.00
4/11/2018 0.00
4/12/2018 0.00
4/13/2018 0.00
4/14/2018 0.00
4/15/2018 0.00
4/16/2018 0.00
4/17/2018 0.00
4/18/2018 0.00
4/19/2018 0.00
4/20/2018 0.00
4/21/2018 0.30
4/22/2018 0.08
4/23/2018 0.00
4/24/2018 0.21
4/25/2018 0.00
4/26/2018 0.00
4/27/2018 0.00
4/28/2018 0.00
4/29/2018 0.00
4/30/2018 0.00
5/1/2018 T
5/2/2018 M **
5/3/2018 M 1.05
5/4/2018 0.55
5/5/2018 0.00
5/6/2018 0.00
5/7/2018 0.00
5/8/2018 0.00
5/9/2018 0.00
5/10/2018 0.00
5/11/2018 0.00
5/12/2018 0.21
5/13/2018 0.25
5/14/2018 0.66
5/15/2018 M
5/16/2018 0.00
5/17/2018 0.00
5/18/2018 0.00
5/19/2018 **
5/20/2018 1.06
5/21/2018 0.07
5/22/2018 0.00
5/23/2018 0.14
5/24/2018 0.09
5/25/2018 0.00
5/26/2018 0.00
5/27/2018 0.00
5/28/2018
5/29/2018
5/30/2018
5/31/2018
6/1/2018
6/2/2018 0.00
6/3/2018 0.00
6/4/2018 0.00
6/5/2018 0.00
6/6/2018 0.00
6/7/2018 0.00
6/8/2018 0.00
6/9/2018 0.00
6/10/2018 0.00
6/11/2018 0.00
6/12/2018 0.00
6/13/2018 0.00
6/14/2018 0.00
6/15/2018 0.00
6/16/2018
6/17/2018 0.17
6/18/2018 0.74
6/19/2018 1.19
6/20/2018 0.03
6/21/2018 0.00
6/22/2018 0.01
6/23/2018 0.00
6/24/2018 0.00
6/25/2018 0.15
6/26/2018 0.00
6/27/2018 0.00
6/28/2018 0.00
6/29/2018 0.00
6/30/2018 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2018 0.06
7/2/2018 0.00
7/3/2018 0.00
7/4/2018 T
7/5/2018 T
7/6/2018 0.08
7/7/2018 0.00
7/8/2018 0.00
7/9/2018 0.00
7/10/2018 0.00
7/11/2018 0.00
7/12/2018 0.00
7/13/2018 M
7/14/2018 T
7/15/2018 0.00
7/16/2018 0.40
7/17/2018 0.00
7/18/2018 T
7/19/2018 0.00
7/20/2018 0.00
7/21/2018 0.00
7/22/2018 T
7/23/2018 0.08
7/24/2018 0.97
7/25/2018 0.01
7/26/2018 0.09
7/27/2018
7/28/2018 0.04
7/29/2018 0.02
7/30/2018 0.00
7/31/2018 0.00
8/1/2018 0.00
8/2/2018 0.00
8/3/2018 T
8/4/2018 0.02
8/5/2018 M
8/6/2018 M
8/7/2018 0.00
8/8/2018 0.00
8/9/2018 0.00
8/10/2018 0.00
8/11/2018 0.00
8/12/2018 0.00
8/13/2018 0.00
8/14/2018 0.00
8/15/2018 0.24
8/16/2018 0.00
8/17/2018 0.00
8/18/2018 0.00
8/19/2018 0.09
8/20/2018
8/21/2018
8/22/2018
8/23/2018
8/24/2018
8/25/2018 0.00
8/26/2018 0.00
8/27/2018 0.00
8/28/2018 0.00
8/29/2018 0.00
8/30/2018 0.00
8/31/2018 0.00
9/1/2018 0.00
9/2/2018 T
9/3/2018 0.00
9/4/2018 0.00
9/5/2018 0.85
9/6/2018 0.04
9/7/2018 0.06
9/8/2018 0.00
9/9/2018 T
9/10/2018 0.00
9/11/2018 0.00
9/12/2018 T
9/13/2018
9/14/2018
9/15/2018
9/16/2018
9/17/2018
9/18/2018
9/19/2018
9/20/2018
9/21/2018
9/22/2018
9/23/2018
9/24/2018
9/25/2018 T
9/26/2018 0.00
9/27/2018 0.00
9/28/2018 0.00
9/29/2018 0.00
9/30/2018



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
11/12/2017 8:00 AM 0.00 0.0 M M M
11/13/2017 8:00 AM 0.00 0.0 M M M
11/14/2017 8:00 AM 0.00 0.0 M M M
11/15/2017 8:00 AM 0.00 0.0 M M M
11/16/2017 7:50 AM 0.00 0.0 M M M
11/17/2017 8:00 AM 0.00 0.0 M 0.0 M
11/18/2017 8:00 AM 0.06 0.0 M 0.0 M The measured amount fell before 10:00PM. No more precip after that. Rain on snow board was frozen this morning.
11/19/2017 8:00 AM 0.00 0.0 M 0.0 M
11/20/2017 10:00 AM 0.00 0.0 M M M
11/21/2017 8:00 AM 0.00 0.0 M M M Very windy during night.
11/22/2017 8:00 AM 0.03 0.0 M M M All of the measured rain fell before 1:30PM.
11/23/2017 8:00 AM 0.00 0.0 M M M
11/25/2017 8:00 AM 0.00 0.0 M M M It sprinkled during the afternoon, however, not measurably.
11/26/2017 8:00 AM 0.00 0.0 M M M
11/27/2017 8:00 AM 0.00 0.0 M M M
11/28/2017 8:00 AM 0.00 0.0 M M M
11/29/2017 8:00 AM 0.00 0.0 M M M Frost
11/30/2017 8:00 AM 0.00 0.0 M M M
12/1/2017 8:00 AM 0.00 0.0 M M M
12/2/2017 8:00 AM 0.00 0.0 M M M
12/3/2017 8:00 AM 0.00 0.0 M M M
12/4/2017 8:00 AM 0.00 0.0 M M M
12/5/2017 8:00 AM 0.00 0.0 M M M
12/6/2017 8:00 AM 0.00 0.0 M M M
12/7/2017 8:00 AM 0.00 0.0 M M M
12/8/2017 8:00 AM 0.00 0.0 M M M
12/9/2017 8:00 AM 0.00 0.0 M M M
12/10/2017 8:00 AM 0.00 0.0 M M M
12/11/2017 8:00 AM 0.00 0.0 M M M
12/12/2017 8:00 AM 0.00 0.0 M M M
12/13/2017 8:00 AM 0.00 0.0 M M M
12/14/2017 8:00 AM 0.26 2.3 M M M 0.25 water equivalent from snow fall in cylinder. Figure entered above is from core.
12/15/2017 8:00 AM 0.00 0.0 M M M
12/16/2017 8:00 AM 0.00 0.0 M M M
12/17/2017 9:00 AM T T M M M A few very small particles of snow or ice fell into the cylinder, not enough to measure.
12/18/2017 8:00 AM 0.00 0.0 M M M
12/19/2017 8:00 AM 0.00 0.0 M M M
12/20/2017 8:00 AM 0.00 0.0 M M M
12/21/2017 8:00 AM 0.23 2.4 M M M .22 melted snow from cylinder
12/22/2017 8:00 AM 0.03 0.4 0.03 1.9 0.22 .025" melted new snow. Did not measure snow shortly after snow stopped. Accumulated snow melt was 0.215".
12/23/2017 8:00 AM 0.00 0.0 M 1.9 0.21
12/24/2017 8:00 AM 0.26 3.5 0.25 4.9 0.51 Snow started at around 4:30 pm, very light and fine.
12/25/2017 8:00 AM 0.00 0.0 M 4.5 0.46
12/26/2017 8:00 AM T 0.2 T 4.1 0.51 Flurried for a few minutes around 1:45PM, not measurable. Flurrying now. Snow in tube was very fluffy, not enough to create measurable water equivalent.
12/27/2017 8:00 AM T 0.1 T 4.1 0.49 For a few minutes this morning a strong wind blew through, possibly blowing away some of the new very fluffy snow.
12/28/2017 8:00 AM 0.00 0.0 M 2.8 0.48
12/29/2017 8:00 AM 0.00 0.0 M 1.8 0.34 Melted snow where cored was .43". Lawn at core location was about 80% covered with snow, therefore recorded .34" = .43" X .80. I did the same for total snow depth, 1.8" = 2.2" x .80. Most of my neighbors yards have had more significant melt, much more grass visible.
12/30/2017 8:00 AM T T T 0.0 M There is a small patch of snow from previous snow falls in my yard therefore recorded 0 for total snow. Neighbors' yards have hardly any snow.
12/31/2017 8:00 AM T 0.1 T T M Graupal snow falling lightly.
1/1/2018 8:00 AM T T M M M There are small patches of accumulated snow but the majority of the grass is exposed.
1/2/2018 8:00 AM 0.00 0.0 M T M There is still some snow where the ground is in shade all day.
1/3/2018 8:00 AM 0.00 0.0 M M M
1/4/2018 8:00 AM 0.00 0.0 M M M
2/8/2018 8:00 AM 0.00 0.0 M M M
2/9/2018 8:00 AM 0.00 0.0 M M M Very foggy this morning
2/10/2018 8:30 AM 0.12 1.1 0.11 1.9 M I forgot to put out the snow board so accumulated new snow was measured from an orange plastic stool outside. Took a second Snow core from grassy area, which measured .1" of water. Snow on ground measurement excluded height of grass. This seems like a more consistent way to do this measurement.
2/11/2018 8:30 AM 0.08 1.0 0.04 1.8 0.20 Accumulated snow depth deducted height of grass.
2/12/2018 8:45 AM T 0.3 T T T New fallen snow was very light with distinct uncompacted snow flakes. Most of the old snow has melted, except where there was deep shade. In these areas accumulated snow depth was 1.6" including the height of grass which I estimate to be approximately 1/2".
2/13/2018 8:00 AM M M M M M
2/14/2018 8:00 AM 0.00 0.0 M M M
2/15/2018 8:00 AM 0.00 0.0 M M M
2/16/2018 8:00 AM 0.06 1.2 M M M Forgot snow board. Most of the snow was scraped away by spatula as core was taken from grassy area so no core and melted values. Accumulated new is from grassy area with zero at ground. Snow depth on plastic stool was 0.8"
2/17/2018 8:00 AM 0.00 0.0 M M M
2/18/2018 8:00 AM 0.00 0.0 M M M
2/19/2018 8:00 AM 0.06 1.9 0.03 2.0 0.02 Snow on ground was very fluffy, discrete flakes and very small white pellets. Gauge had very small ice beads inside and outside. Snow on ground depth deducted height of grass. It was difficult to get a good core from grass, a lot to most of the snow was left tangled in the grass.
2/20/2018 8:00 AM 0.47 6.0 0.36 7.0 0.47 Snow depth from ground, total snow, deducts fro grass height.
2/21/2018 8:00 AM 0.00 0.0 M 5.5 0.46 Long crystals were formed on the gauge.
2/22/2018 8:00 AM 0.00 0.0 M 4.3 0.48
2/23/2018 8:00 AM 0.00 0.0 M 3.3 0.45
2/24/2018 8:00 AM 0.19 3.2 0.20 7.0 0.74
2/25/2018 8:00 AM 0.00 0.0 M 4.1 0.58
3/1/2018 8:00 AM 0.00 0.0 M M M
3/2/2018 8:00 AM 0.00 0.0 M 0.0 M There is still snow on the ground in heavily shaded areas of yard. Elsewhere snow has disappeared.
3/3/2018 8:00 AM 0.00 0.0 M 0.0 M
3/4/2018 8:00 AM 0.00 0.0 M 0.0 M
3/5/2018 8:00 AM 0.00 0.0 M 0.0 M
3/6/2018 8:00 AM 0.00 0.0 M M M
3/7/2018 8:00 AM 0.00 0.0 M M M
3/8/2018 8:00 AM 0.00 0.0 M M M
3/9/2018 8:00 AM 0.00 0.0 M M M
3/10/2018 8:00 AM 0.00 0.0 M M M
3/11/2018 8:00 AM 0.00 0.0 M M M
3/12/2018 8:00 AM 0.00 0.0 M M M
3/13/2018 8:00 AM 0.00 0.0 M M M
3/14/2018 8:00 AM 0.00 0.0 M M M
3/17/2018 8:00 AM 0.00 0.0 M M M
3/18/2018 8:00 AM 0.00 0.0 M M M
3/19/2018 8:00 AM 0.61 M 0.11 M M Precipitation on board was ice, .3" thick, no core taken. It was difficult to get a reliable snow depth on the ground because most depth was grass, therefore no measurement is given.
3/20/2018 8:00 AM 0.00 0.0 M M M
3/21/2018 8:00 AM 0.00 0.0 M M M
3/22/2018 8:00 AM 0.00 0.0 M M M
3/23/2018 8:00 AM 0.00 0.0 M M M
3/24/2018 8:00 AM 0.00 0.0 M M M
3/26/2018 8:00 AM 0.07 0.0 M 0.0 M
3/27/2018 8:00 AM 0.59 2.8 0.46 3.0 0.38 Very light intermittent sprinkles started around 4:30pm. Snow began around 6:30pm becoming heavy quickly. Tree branches had ice drips on them but we're not coated in ice. The branches held heavy snow.
3/28/2018 8:00 AM 0.00 0.0 M 0.0 M
3/29/2018 8:00 AM 0.43 1.0 0.24 2.4 0.16 All precipitation in gauge was in form of ice. It was difficult to get a clean ground snow core as the snow was between grass blades.
3/30/2018 8:00 AM 0.15 M M M M Snow on the ground was not higher than top off grass blades therefore no measurement was taken. Snow on board was compressed wet snow, icy, and required chipping to get a measurement of depth.
3/31/2018 8:00 AM 0.00 0.0 M M M
4/1/2018 8:00 AM 0.05 0.4 0.04 T M Sprinkled on top of icy snow was round white snow pellets. Snow on ground was within grass and not possible to measure accurately or core.
4/2/2018 8:00 AM 0.00 0.0 M M M
4/3/2018 8:00 AM 0.00 0.0 M M M
4/4/2018 8:00 AM 0.00 0.0 M M M
4/5/2018 8:00 AM 0.00 0.0 M M M
4/6/2018 8:00 AM 0.00 0.0 M M M
4/7/2018 8:00 AM 0.48 4.7 0.43 5.1 0.40
4/8/2018 8:00 AM 0.00 0.0 M M M
4/9/2018 8:00 AM 0.09 0.2 0.07 M M Snow on ground was not core able, within depth of grass.
4/10/2018 8:00 AM 0.00 0.0 M M M
4/11/2018 8:00 AM 0.00 0.0 M M M
4/12/2018 8:00 AM 0.00 0.0 M M M
4/13/2018 8:00 AM 0.00 0.0 M M M
4/14/2018 8:00 AM 0.00 0.0 M M M
4/15/2018 8:00 AM 0.00 0.0 M M M
4/16/2018 8:00 AM 0.00 0.0 M M M
4/17/2018 8:00 AM 0.00 0.0 M M M
4/18/2018 8:00 AM 0.00 0.0 M M M
4/19/2018 8:00 AM 0.00 0.0 M M M
4/20/2018 8:00 AM 0.00 0.0 M M M
4/21/2018 9:00 AM 0.30 T M M M When rain started it was very light and stopped several times. Time recorded for heaviest precipitation was while I was awake. Who knows what was going on while I was asleep.
4/22/2018 9:00 AM 0.08 M M M M There was ice floating in the gauge, and frost on the ground.
4/23/2018 8:00 AM 0.00 0.0 M M M
4/24/2018 8:00 AM 0.21 T M M M There was slush on snow board. By the time I got out to measure it, around 8:50, it had mostly melted.
4/25/2018 8:00 AM 0.00 0.0 M M M
4/26/2018 8:00 AM 0.00 0.0 M M M
4/27/2018 8:00 AM 0.00 0.0 M M M
4/28/2018 8:00 AM 0.00 0.0 M M M
4/29/2018 8:00 AM 0.00 0.0 M M M
4/30/2018 8:00 AM 0.00 0.0 M M M
5/1/2018 8:00 AM T M M M M This morning rain started as light becoming mist like in a few minutes, just before 8:00AM.
5/2/2018 8:00 AM M M M M M
5/3/2018 8:00 AM M M M M M 1.05" was in the gauge from the last 2 days.
5/4/2018 8:00 AM 0.55 M M M M
5/5/2018 8:00 AM 0.00 0.0 M M M
5/6/2018 8:00 AM 0.00 0.0 M M M
5/7/2018 8:00 AM 0.00 0.0 M M M
5/8/2018 8:00 AM 0.00 0.0 M M M
5/9/2018 8:00 AM 0.00 0.0 M M M
5/10/2018 8:00 AM 0.00 0.0 M M M
5/11/2018 8:00 AM 0.00 0.0 M M M
5/12/2018 8:00 AM 0.21 M M M M
5/13/2018 9:55 AM 0.25 M M M M I forgot to check at 8:00 AM. There was a fairly steady light drizzle between 8:00, when I should have checked, and when I checked.
5/14/2018 8:00 AM 0.66 M M M M
5/15/2018 8:00 AM M 0.0 M M M
5/16/2018 8:00 AM 0.00 0.0 M M M
5/17/2018 8:00 AM 0.00 0.0 M M M
5/18/2018 8:00 AM 0.00 0.0 M M M
5/21/2018 8:00 AM 0.07 M M M M
5/22/2018 8:00 AM 0.00 0.0 M M M
5/23/2018 8:00 AM 0.14 M M M M Rain stopped at 19:48.
5/24/2018 8:00 AM 0.09 M M M M
5/25/2018 8:00 AM 0.00 0.0 M M M
5/26/2018 8:00 AM 0.00 0.0 M M M
5/27/2018 8:00 AM 0.00 0.0 M M M
6/2/2018 8:00 AM 0.00 0.0 M M M
6/3/2018 8:00 AM 0.00 0.0 M M M
6/4/2018 8:00 AM 0.00 0.0 M M M
6/5/2018 8:00 AM 0.00 0.0 M M M
6/6/2018 8:00 AM 0.00 0.0 M M M
6/7/2018 8:00 AM 0.00 0.0 M M M
6/8/2018 8:00 AM 0.00 0.0 M M M
6/9/2018 8:00 AM 0.00 0.0 M M M
6/10/2018 8:00 AM 0.00 0.0 M M M
6/11/2018 8:00 AM 0.00 0.0 M M M
6/12/2018 8:00 AM 0.00 0.0 M M M
6/13/2018 8:00 AM 0.00 0.0 M M M
6/14/2018 8:00 AM 0.00 0.0 M M M At 8:38PM the sky spit a few drops.
6/15/2018 8:00 AM 0.00 0.0 M M M
6/17/2018 8:00 AM 0.17 M M M M By 2:00pm when rain stopped gauge had 0.16" in it. Rain started again before 4:00pm. Did not note when it ceased again.
6/18/2018 8:20 AM 0.74 M M M M
6/19/2018 8:10 AM 1.19 M M M M Heavy rain started around 5:45pm, by 5:48 there were a few pellets of hail, 1/8"-3/16" diameter, thunder & lightening. By 5:56 hail size increased to 1/8"-1" but most was in the 1/4"-1/2" size. Some of the larger hail was flat, disk shaped. At this time thunder was very loud. At 6:03 hail size was from 5/8"-3/4" with some 1". 6:07 hail tapering off, rain continued. 6:14 sun shining while rain was light. 6:15 rain intensity increased. 6:18 thunder stopped, rain reduced to a few drops. 7:02 sound of distant thunder, steady moderate rain. Rain increased intensity & was heavy by 7:08. After this time I stopped paying attention. I woke in middle of night to the sound of heavy rain, did not note time.
6/20/2018 6:53 PM 0.03 M M M M Forgot to check gauge this morning. I believe it has not rained since my usual check time. Now at 6:53pm 6/20 rain measured .03".
6/21/2018 8:00 AM 0.00 0.0 M M M
6/22/2018 8:00 AM 0.01 M M M M
6/23/2018 8:00 AM 0.00 0.0 M M M
6/24/2018 8:00 AM 0.00 0.0 M M M
6/25/2018 8:00 AM 0.15 M M M M
6/26/2018 8:00 AM 0.00 0.0 M M M
6/27/2018 8:00 AM 0.00 0.0 M M M
6/28/2018 8:00 AM 0.00 0.0 M M M A few drops fell in the afternoon, nothing measurable.
6/29/2018 8:00 AM 0.00 0.0 M M M A few drops fell in afternoon.
6/30/2018 8:00 AM 0.00 0.0 M M M
7/1/2018 8:00 AM 0.06 M M M M
7/2/2018 8:00 AM 0.00 0.0 M M M
7/3/2018 8:00 AM 0.00 0.0 M M M
7/4/2018 8:00 AM T M M M M A few drops of rain fell in the afternoon and evaporated quickly.
7/5/2018 8:00 AM T M M M M A few drops of rain fell late afternoon, not enough to measure.
7/6/2018 8:00 AM 0.08 M M M M
7/7/2018 8:00 AM 0.00 0.0 M M M
7/8/2018 8:00 AM 0.00 0.0 M M M
7/9/2018 8:00 AM 0.00 0.0 M M M
7/10/2018 8:00 AM 0.00 0.0 M M M
7/11/2018 8:00 AM 0.00 0.0 M M M
7/12/2018 8:00 AM 0.00 0.0 M M M
7/13/2018 8:00 AM M M M M M
7/14/2018 8:00 AM T M M M M It rained a few drops at around 3:00pm.
7/15/2018 8:00 AM 0.00 0.0 M M M
7/16/2018 8:00 AM 0.40 M M M M
7/17/2018 8:00 AM 0.00 0.0 M M M
7/18/2018 8:00 AM T M M M M A few rain drops in afternoon, nothing measurable.
7/19/2018 8:00 AM 0.00 0.0 M M M
7/20/2018 8:00 AM 0.00 0.0 M M M
7/21/2018 8:00 AM 0.00 0.0 M M M
7/22/2018 8:00 AM T M M M M Light rain in the afternoon was enough to wet pavement.
7/23/2018 8:00 AM 0.08 M M M M
7/24/2018 8:00 AM 0.97 M M M M
7/25/2018 8:00 AM 0.01 M M M M
7/26/2018 8:00 AM 0.09 M M M M
7/28/2018 8:00 AM 0.04 M M M M
7/29/2018 9:00 AM 0.02 M M M M My usual measurement time has been 8:00. This morning I measured at 9:00. It doesn't appear rain fell recently so it's possible this measurement can be considered to be for a 24 hr period.
7/30/2018 9:00 AM 0.00 0.0 M M M
7/31/2018 9:00 AM 0.00 0.0 M M M
8/1/2018 9:00 AM 0.00 0.0 M M M
8/2/2018 9:00 AM 0.00 0.0 M M M
8/3/2018 9:00 AM T M M M M Light rain is continuing.
8/4/2018 9:00 AM 0.02 M M M M
8/5/2018 9:00 AM M 0.0 M M M
8/6/2018 8:00 AM M M M M M
8/7/2018 9:00 AM 0.00 0.0 M M M
8/8/2018 8:30 AM 0.00 0.0 M M M
8/9/2018 8:30 AM 0.00 0.0 M M M
8/10/2018 8:00 AM 0.00 0.0 M M M
8/11/2018 8:00 AM 0.00 0.0 M M M
8/12/2018 8:00 AM 0.00 0.0 M M M
8/13/2018 8:00 AM 0.00 0.0 M M M
8/14/2018 8:00 AM 0.00 0.0 M M M
8/15/2018 8:00 AM 0.24 M M M M
8/16/2018 8:00 AM 0.00 0.0 M M M
8/17/2018 8:00 AM 0.00 0.0 M M M
8/18/2018 8:00 AM 0.00 0.0 M M M
8/19/2018 8:00 AM 0.09 M M M M
8/25/2018 8:00 AM 0.00 0.0 M M M
8/26/2018 8:00 AM 0.00 0.0 M M M
8/27/2018 8:00 AM 0.00 0.0 M M M
8/28/2018 8:00 AM 0.00 0.0 M M M
8/29/2018 8:00 AM 0.00 0.0 M M M
8/30/2018 8:00 AM 0.00 0.0 M M M
8/31/2018 8:00 AM 0.00 0.0 M M M
9/1/2018 8:00 AM 0.00 0.0 M M M
9/2/2018 8:00 AM T M M M M Sky spit very lightly for a few minutes in the afternoon
9/3/2018 8:00 AM 0.00 0.0 M M M
9/4/2018 8:00 AM 0.00 0.0 M M M
9/5/2018 8:00 AM 0.85 M M M M
9/6/2018 8:00 AM 0.04 M M M M
9/7/2018 8:00 AM 0.06 M M M M
9/8/2018 8:00 AM 0.00 0.0 M M M
9/9/2018 8:00 AM T M M M M It rained very lightly for a few minutes around 5:00pm but there we as no trace in the gauge.
9/10/2018 8:00 AM 0.00 0.0 M M M
9/11/2018 8:00 AM 0.00 0.0 M M M
9/12/2018 8:00 AM T M M M M
9/25/2018 7:55 AM T M M M M The sky spit very fine, widely spaces rain droplets for a couple minutes at mid morning.
9/26/2018 8:00 AM 0.00 0.0 M M M
9/27/2018 8:00 AM 0.00 0.0 M M M
9/28/2018 8:00 AM 0.00 0.0 M M M
9/29/2018 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
5/2/2018 5/03/2018 8:00 AM 2 1.05 M M
5/19/2018 5/20/2018 8:00 AM 2 1.06 M M Though I heard hail fell in Boulder that afternoon I didn't see evidence of it when I returned home in the evening of 5/19/18.



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
5/22/2018 6:55 PM 1/2" Grape NA Rice Hard|White Ice 5 2min no damage.minor leaf damage Continuous False After rain 10-20
1/1/0001 12:00 AM I picked up one 5/8" hail pellet that had one side cleaved off so the interior was visible. From the center out, there was an irregular particle looking thing at the center less than 1/8" long x 1/16", then a thick layer of clear ice, next a layer of white ice, clear ice and on the exterior white ice. 1" Quarter Size 1/2" Grape Rice Hard|Clear Ice|White Ice shredded leaves Intermittent True After rain After smaller hail