Station Overview Station Location
Station Number CO-BO-452 Latitude 40.04439
Station Name Boulder 2.2 NW Longitude -105.28519
County Boulder Elevation (ft) 5598



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 1.35 2.04 29 2.04 29 0.00 0 0 8 1 2.1 2 2
Nov 18 1.02 1.16 30 0.52 27 0.64 3 1 3 1 2.3 1 2
Dec 18 0.79 0.17 32 0.11 30 0.06 2 1 1 5 1.8 1 1
Jan 19 0.65 1.39 29 0.62 27 0.77 2 1 3 0 9.3 3 6
Feb 19 0.69 0.63 28 0.63 28 0.00 0 0 5 4 11.9 5 9
March 19 1.85 2.74 32 1.65 30 1.09 2 1 5 1 13.3 3 5
April 19 2.35 2.03 30 1.29 28 0.74 2 1 4 2 8.9 3 4
May 19 2.83 4.29 31 0.95 17 3.34 14 3 6 3 0.0 0 0
June 19 2.61 2.89 30 2.89 30 0.00 0 0 10 6 0.0 0 0
July 19 1.66 2.55 31 2.55 31 0.00 0 0 7 3 0.0 0 0
Aug 19 1.91 0.35 31 0.35 31 0.00 0 0 4 3 0.0 0 0
Sept 19 1.45 1.03 30 0.46 21 0.57 9 1 3 0 0.0 0 0
Water Year Totals: 19.16" 21.27" 363 days 14.06" 329 7.21" 34 days 9 59 days 29 days 49.6" 18 days 29 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 0.00
10/2/2018 0.02
10/3/2018 0.00
10/4/2018 0.00
10/5/2018 0.22
10/6/2018 0.13
10/7/2018 0.00
10/8/2018 0.50
10/9/2018 0.33
10/10/2018 0.29
10/11/2018 0.24
10/12/2018 0.00
10/13/2018 0.00
10/14/2018 M
10/15/2018 M
10/16/2018 0.00
10/17/2018 0.00
10/18/2018 0.00
10/19/2018 0.00
10/20/2018 0.00
10/21/2018 0.00
10/22/2018 0.00
10/23/2018 0.00
10/24/2018 T
10/25/2018 0.00
10/26/2018 0.00
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 0.11
11/4/2018 0.02
11/5/2018 0.00
11/6/2018 0.00
11/7/2018 0.00
11/8/2018 T
11/9/2018 0.00
11/10/2018 **
11/11/2018 **
11/12/2018 0.64
11/13/2018 0.00
11/14/2018 0.00
11/15/2018 0.00
11/16/2018 0.00
11/17/2018 0.00
11/18/2018 0.39
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 0.00
11/25/2018 0.00
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 T
12/2/2018 0.00
12/3/2018 0.11
12/4/2018 0.00
12/5/2018 0.00
12/6/2018 **
12/7/2018 0.00 0.06
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 T
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 0.00
12/31/2018 0.00
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 0.00
1/9/2019 0.00
1/10/2019 0.00
1/11/2019 **
1/12/2019 0.77
1/13/2019 0.00
1/14/2019 0.00
1/15/2019 0.00
1/16/2019 0.00
1/17/2019 0.00
1/18/2019 0.00
1/19/2019 M
1/20/2019 0.00
1/21/2019 0.00
1/22/2019
1/23/2019 0.00
1/24/2019 0.16
1/25/2019 0.00
1/26/2019 0.00
1/27/2019 0.00
1/28/2019 0.29
1/29/2019 0.00
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 0.00
2/7/2019 0.31
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 T
2/16/2019 0.00
2/17/2019 T
2/18/2019 0.06
2/19/2019 T
2/20/2019 0.04
2/21/2019 0.00
2/22/2019 0.06
2/23/2019 0.16
2/24/2019 0.00
2/25/2019 0.00
2/26/2019 0.00
2/27/2019 0.00
2/28/2019 T
3/1/2019 0.00
3/2/2019 0.00
3/3/2019 0.56
3/4/2019 0.11
3/5/2019 0.00
3/6/2019 0.00
3/7/2019 0.11
3/8/2019 0.00
3/9/2019 0.00
3/10/2019 0.00
3/11/2019 0.00
3/12/2019 T
3/13/2019 **
3/14/2019 0.00 1.09
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 0.14
3/24/2019 0.00
3/25/2019 0.00
3/26/2019 0.00
3/27/2019 0.00
3/28/2019 0.00
3/29/2019 0.00
3/30/2019 0.73
3/31/2019 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2019 0.00
4/2/2019 0.00
4/3/2019 T
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 0.00
4/11/2019 0.69
4/12/2019 0.00
4/13/2019 0.17
4/14/2019 T
4/15/2019 0.00
4/16/2019 0.00
4/17/2019 0.00
4/18/2019 0.04
4/19/2019 0.00
4/20/2019 0.00
4/21/2019 0.00
4/22/2019 **
4/23/2019 0.74
4/24/2019 0.00
4/25/2019 0.00
4/26/2019 0.00
4/27/2019 0.00
4/28/2019 0.00
4/29/2019 0.00
4/30/2019 0.39
5/1/2019 0.15
5/2/2019 0.09
5/3/2019 **
5/4/2019 **
5/5/2019 **
5/6/2019 **
5/7/2019 **
5/8/2019 **
5/9/2019 **
5/10/2019 **
5/11/2019 **
5/12/2019 1.59
5/13/2019 0.00
5/14/2019 T
5/15/2019 0.00
5/16/2019 0.00
5/17/2019 0.00
5/18/2019 0.17
5/19/2019 0.00
5/20/2019 **
5/21/2019 1.23
5/22/2019 T
5/23/2019 **
5/24/2019 0.52
5/25/2019 0.00
5/26/2019 0.00
5/27/2019 0.09
5/28/2019 0.31
5/29/2019 0.14
5/30/2019 0.00
5/31/2019 T
6/1/2019 T
6/2/2019 T
6/3/2019 T
6/4/2019 0.19
6/5/2019 0.06
6/6/2019 0.11
6/7/2019 T
6/8/2019 0.21
6/9/2019 0.04
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 0.34
6/18/2019 0.81
6/19/2019 0.03
6/20/2019 0.00
6/21/2019 T
6/22/2019 1.06
6/23/2019 0.00
6/24/2019 0.04
6/25/2019 0.00
6/26/2019 0.00
6/27/2019 0.00
6/28/2019 0.00
6/29/2019 0.00
6/30/2019 T
Day of YearDaily PrcpMultiday Prcp
7/1/2019 T
7/2/2019 1.04
7/3/2019 0.00
7/4/2019 0.00
7/5/2019 0.41
7/6/2019 0.00
7/7/2019 0.00
7/8/2019 0.00
7/9/2019 0.00
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 0.19
7/16/2019 0.00
7/17/2019 0.00
7/18/2019 0.00
7/19/2019 0.00
7/20/2019 0.00
7/21/2019 0.29
7/22/2019 0.51
7/23/2019 0.00
7/24/2019 0.00
7/25/2019 0.09
7/26/2019 T
7/27/2019 0.00
7/28/2019 0.00
7/29/2019 0.00
7/30/2019 0.00
7/31/2019 T
8/1/2019 0.00
8/2/2019 0.06
8/3/2019 0.06
8/4/2019 0.00
8/5/2019 0.00
8/6/2019 0.11
8/7/2019 0.00
8/8/2019 T
8/9/2019 0.12
8/10/2019 0.00
8/11/2019 0.00
8/12/2019 0.00
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 0.00
8/22/2019 T
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 0.03
9/6/2019 0.07
9/7/2019 **
9/8/2019 **
9/9/2019 **
9/10/2019 **
9/11/2019 **
9/12/2019 **
9/13/2019 **
9/14/2019 **
9/15/2019 0.57
9/16/2019 0.00
9/17/2019 0.00
9/18/2019 0.00
9/19/2019 0.00
9/20/2019 0.00
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 0.36
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 0.00 0.0 M M M
10/2/2018 8:00 AM 0.02 M M M M
10/3/2018 8:00 AM 0.00 0.0 M M M
10/4/2018 8:00 AM 0.00 0.0 M M M
10/5/2018 8:00 AM 0.22 M M M M Lots of rolling thunder from the west, preceding the rain. Very tiny hail at times.
10/6/2018 8:00 AM 0.13 M M M M
10/7/2018 8:00 AM 0.00 0.0 M M M
10/8/2018 8:00 AM 0.50 M M M M Mostly a gentle mist until it turned to light rain in the late evening.
10/9/2018 8:00 AM 0.33 M M M M Mist and drizzle early in the day, occasional rain during the night.
10/10/2018 8:00 AM 0.29 1.0 M M M
10/11/2018 8:00 AM 0.24 M M 1.5 M A wet rain/snow combination all day.
10/12/2018 8:00 AM 0.00 0.0 M M M
10/13/2018 8:00 AM 0.00 0.0 M M M
10/14/2018 8:00 AM M 0.0 M M M {EDIT: Observer reported 0.00 for new precip. QPE data and surrounding reports of 0.41 to 0.66 indicate this could be a date error. It appears 10/14 and 10/15 reports were switched during submission. Changed report of 0.00 to NA until observer can be contacted to verify. Submission Time Before EDIT: 10/16/2018 11:21 AM CoCoSTAFF DNT}
10/15/2018 8:00 AM M M M M M {EDIT: Observer reported 8.6 for new snowfall and 0.56 for new precip and new snowfall melted core. This is high compared to surrounding reports and appears to be a two day total or a date error. Changed reports of 0.56 and 8.6 to NA until observer can be contacted to verify. Submission Time Before EDIT: 10/16/2018 11:34 AM CoCoSTAFF DNT}
10/16/2018 8:00 AM 0.00 0.0 M M M
10/17/2018 8:00 AM 0.00 0.0 M M M
10/18/2018 8:00 AM 0.00 0.0 M M M
10/19/2018 8:00 AM 0.00 0.0 M M M
10/20/2018 8:00 AM 0.00 0.0 M M M
10/21/2018 8:00 AM 0.00 0.0 M M M
10/22/2018 8:00 AM 0.00 0.0 M M M
10/23/2018 8:00 AM 0.00 0.0 M M M
10/24/2018 8:00 AM T 0.0 M M M
10/25/2018 8:00 AM 0.00 0.0 M M M
10/26/2018 8:00 AM 0.00 0.0 M M M
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 1.1 M 1.0 M
11/1/2018 8:00 AM 0.00 0.0 M M M
11/2/2018 8:00 AM 0.00 0.0 M M M
11/3/2018 8:00 AM 0.11 M M M M
11/4/2018 8:00 AM 0.02 M M M M
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 T M M M M
11/9/2018 8:00 AM 0.00 0.0 M M M
11/13/2018 8:00 AM 0.00 0.0 M 10.5 0.66
11/14/2018 8:00 AM 0.00 0.0 M M M
11/15/2018 8:00 AM 0.00 0.0 M M M
11/16/2018 8:00 AM 0.00 0.0 M M M
11/17/2018 8:00 AM 0.00 0.0 M M M
11/18/2018 8:00 AM 0.39 2.3 M 2.5 M
11/19/2018 8:00 AM 0.00 0.0 M M M
11/20/2018 8:00 AM 0.00 0.0 M M M
11/21/2018 8:00 AM 0.00 0.0 M M M
11/22/2018 8:00 AM 0.00 0.0 M M M
11/23/2018 8:00 AM 0.00 0.0 M M M
11/24/2018 8:00 AM 0.00 0.0 M M M
11/25/2018 8:00 AM 0.00 0.0 M M M
11/26/2018 8:00 AM 0.00 0.0 M M M
11/27/2018 8:00 AM 0.00 0.0 M M 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 M M
11/30/2018 8:00 AM 0.00 0.0 M M M
12/1/2018 8:00 AM T M M M M
12/2/2018 8:00 AM 0.00 0.0 M M M
12/3/2018 8:00 AM 0.11 1.8 M 1.8 M
12/4/2018 8:00 AM 0.00 0.0 M M M
12/5/2018 8:00 AM 0.00 0.0 M M M
12/7/2018 8:00 AM 0.00 0.0 M M M
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 M 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 0.00 0.0 0.00
12/15/2018 8:00 AM 0.00 0.0 M 0.0 M
12/16/2018 8:00 AM 0.00 0.0 M 0.0 M
12/17/2018 8:00 AM 0.00 0.0 M 0.0 M
12/18/2018 8:00 AM 0.00 0.0 M 0.0 M
12/19/2018 8:00 AM 0.00 0.0 M 0.0 M
12/20/2018 8:00 AM 0.00 0.0 M 0.0 M
12/21/2018 8:00 AM 0.00 0.0 M 0.0 M
12/22/2018 8:00 AM T 0.0 M 0.0 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 0.0 M
12/25/2018 8:00 AM 0.00 0.0 M 0.0 M
12/26/2018 8:00 AM 0.00 0.0 M 0.0 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 Very light flurries on and off during the daylight hours.
12/29/2018 8:00 AM T 0.0 M 0.0 M Very light flurries on and off during the daylight hours.
12/30/2018 8:00 AM 0.00 0.0 M 0.0 M
12/31/2018 8:00 AM 0.00 0.0 M 0.0 M
1/1/2019 8:00 AM 0.17 3.1 0.16 3.0 0.16
1/2/2019 8:00 AM 0.00 0.0 M 2.5 0.16 Very sunny and cloudless skies, but quite cold (12 degrees)
1/3/2019 8:00 AM 0.00 0.0 M 0.0 M
1/4/2019 8:00 AM 0.00 0.0 M 0.0 M
1/5/2019 8:00 AM 0.00 0.0 M 0.0 M
1/6/2019 8:00 AM 0.00 0.0 M 0.0 M
1/7/2019 8:00 AM 0.00 0.0 M 0.0 M
1/8/2019 8:00 AM 0.00 0.0 M 0.0 M
1/9/2019 8:00 AM 0.00 0.0 M 0.0 M
1/10/2019 8:00 AM 0.00 0.0 M 0.0 M
1/13/2019 8:00 AM 0.00 0.0 M 2.5 0.41
1/14/2019 8:00 AM 0.00 0.0 M 0.0 M
1/15/2019 8:00 AM 0.00 0.0 M 0.0 M
1/16/2019 8:00 AM 0.00 0.0 M 0.0 M
1/17/2019 8:00 AM 0.00 0.0 M 0.0 M
1/18/2019 8:00 AM 0.00 0.0 M 0.0 M
1/19/2019 8:00 AM M M M M M
1/20/2019 8:00 AM 0.00 0.0 M 0.0 M
1/21/2019 8:00 AM 0.00 0.0 M 0.0 M
1/23/2019 8:00 AM 0.00 0.0 M 0.0 M
1/24/2019 8:00 AM 0.16 2.6 M M M Snowfall started as little pellets, then gradually turned to a light, fluffy, fairly dry snow.
1/25/2019 8:00 AM 0.00 0.0 M 1.5 0.16
1/26/2019 8:00 AM 0.00 0.0 M 0.0 M
1/27/2019 8:00 AM 0.00 0.0 M 0.0 M
1/28/2019 1:00 PM 0.29 3.6 0.28 3.6 0.28
1/29/2019 8:00 AM 0.00 0.0 M 3.5 0.27
1/30/2019 8:00 AM 0.00 0.0 M 0.0 M
1/31/2019 8:00 AM 0.00 0.0 M 0.0 M
2/1/2019 8:00 AM 0.00 0.0 M 0.0 M
2/2/2019 8:00 AM 0.00 0.0 M 0.0 M
2/3/2019 8:00 AM 0.00 0.0 M 0.0 M
2/4/2019 8:00 AM 0.00 0.0 M 0.0 M
2/5/2019 8:00 AM 0.00 0.0 M 0.0 M
2/6/2019 8:00 AM 0.00 0.0 M 0.0 M
2/7/2019 8:00 AM 0.31 5.2 0.31 5.0 0.29 Super foggy in the early am, then a very light snow starting mid-morning, changing to a near white-out snowstorm early afternoon.
2/8/2019 8:00 AM 0.00 0.0 M 4.5 M
2/9/2019 8:00 AM 0.00 0.0 M 3.0 0.25
2/10/2019 8:00 AM 0.00 0.0 M 2.0 M
2/11/2019 8:00 AM 0.00 0.0 M 0.0 M
2/12/2019 8:00 AM 0.00 0.0 M 0.0 M
2/13/2019 8:00 AM 0.00 0.0 M 0.0 M
2/14/2019 8:00 AM 0.00 0.0 M 0.0 M
2/15/2019 8:00 AM T T M 0.0 M
2/16/2019 8:00 AM 0.00 0.0 M 0.0 M
2/17/2019 8:00 AM T 0.0 M 0.0 M
2/18/2019 8:00 AM 0.06 3.2 0.05 3.2 M
2/19/2019 8:00 AM T T M 2.0 0.03
2/20/2019 8:00 AM 0.04 0.1 0.04 2.0 M
2/21/2019 8:00 AM 0.00 0.0 M 0.0 M
2/22/2019 8:00 AM 0.06 1.1 0.06 1.1 M
2/23/2019 8:00 AM 0.16 2.3 0.16 3.0 0.21
2/24/2019 8:00 AM 0.00 0.0 M 0.0 M
2/25/2019 8:00 AM 0.00 0.0 M 0.0 M
2/26/2019 8:00 AM 0.00 0.0 M 0.0 M
2/27/2019 8:00 AM 0.00 0.0 M 0.0 M
2/28/2019 8:00 AM T T T M M
3/1/2019 8:00 AM 0.00 0.0 M 0.0 M
3/2/2019 8:00 AM 0.00 0.0 M 0.0 M
3/3/2019 8:00 AM 0.56 5.9 0.48 6.0 0.48 Very dry, fluffy snow.
3/4/2019 8:00 AM 0.11 1.3 0.11 6.3 M Very cold - 3 degrees. Snow is champagne powder, light and dry.
3/5/2019 8:00 AM 0.00 0.0 M 5.0 0.53
3/6/2019 8:00 AM 0.00 0.0 M 0.0 M
3/7/2019 8:00 AM 0.11 0.0 M 0.0 M Freezing drizzle, and then intense fog all morning.
3/8/2019 8:00 AM 0.00 0.0 M 0.0 M
3/9/2019 8:00 AM 0.00 0.0 M 0.0 M
3/10/2019 8:00 AM 0.00 0.0 M 0.0 M
3/11/2019 8:00 AM 0.00 0.0 M 0.0 M
3/12/2019 8:00 AM T 0.0 M 0.0 M
3/14/2019 8:00 AM 0.00 0.0 M 0.0 M
3/15/2019 8:00 AM 0.00 0.0 M 0.0 M
3/16/2019 8:00 AM 0.00 0.0 M 0.0 M
3/17/2019 8:00 AM 0.00 0.0 M 0.0 M
3/18/2019 8:00 AM 0.00 0.0 M 0.0 M
3/19/2019 8:00 AM 0.00 0.0 M 0.0 M
3/20/2019 8:00 AM 0.00 0.0 M 0.0 M
3/21/2019 8:00 AM 0.00 0.0 M 0.0 M
3/22/2019 8:00 AM 0.00 0.0 M 0.0 M
3/23/2019 8:00 AM 0.14 0.0 M 0.0 M
3/24/2019 8:00 AM 0.00 0.0 M 0.0 M
3/25/2019 8:00 AM 0.00 0.0 M 0.0 M
3/26/2019 8:00 AM 0.00 0.0 M 0.0 M
3/27/2019 8:00 AM 0.00 0.0 M 0.0 M
3/28/2019 8:00 AM 0.00 0.0 M 0.0 M
3/29/2019 8:00 AM 0.00 0.0 M 0.0 M
3/30/2019 8:00 AM 0.73 6.1 0.44 6.1 0.44 Started in the early a.m. as a misty drizzle, then early afternoon saw a brief but steady rain, which then changed to snow late in the evening and continuing into the early morning hours.
3/31/2019 8:00 AM 0.00 0.0 M 1.5 0.37
4/1/2019 8:00 AM 0.00 0.0 M 0.0 M
4/2/2019 8:00 AM 0.00 0.0 M 0.0 M
4/3/2019 8:00 AM T 0.0 M 0.0 M
4/4/2019 8:00 AM 0.00 0.0 M 0.0 M
4/5/2019 8:00 AM 0.00 0.0 M 0.0 M
4/6/2019 8:00 AM 0.00 0.0 M 0.0 M
4/7/2019 8:00 AM 0.00 0.0 M 0.0 M
4/8/2019 8:00 AM 0.00 0.0 M 0.0 M
4/9/2019 8:00 AM 0.00 0.0 M 0.0 M
4/10/2019 8:00 AM 0.00 0.0 M 0.0 M
4/11/2019 8:00 AM 0.69 3.8 0.41 3.8 0.41
4/12/2019 8:00 AM 0.00 0.0 M 1.0 0.26
4/13/2019 8:00 AM 0.17 1.3 0.14 1.5 0.14
4/14/2019 8:00 AM T 0.0 M 0.0 M
4/15/2019 8:00 AM 0.00 0.0 M 0.0 M
4/16/2019 8:00 AM 0.00 0.0 M 0.0 M
4/17/2019 8:00 AM 0.00 0.0 M 0.0 M
4/18/2019 8:00 AM 0.04 0.0 M 0.0 M
4/19/2019 8:00 AM 0.00 0.0 M 0.0 M
4/20/2019 8:00 AM 0.00 0.0 M 0.0 M
4/21/2019 8:00 AM 0.00 0.0 M 0.0 M
4/24/2019 8:00 AM 0.00 0.0 M 0.0 M
4/25/2019 8:00 AM 0.00 0.0 M 0.0 M
4/26/2019 8:00 AM 0.00 0.0 M 0.0 M
4/27/2019 8:00 AM 0.00 0.0 M 0.0 M
4/28/2019 8:00 AM 0.00 0.0 M 0.0 M
4/29/2019 8:00 AM 0.00 0.0 M 0.0 M
4/30/2019 8:00 AM 0.39 3.8 0.39 4.0 0.38
5/1/2019 8:00 AM 0.15 0.0 M 0.0 M
5/2/2019 8:00 AM 0.09 0.0 M 0.0 M
5/13/2019 8:00 AM 0.00 0.0 M 0.0 M
5/14/2019 8:00 AM T 0.0 M 0.0 M
5/15/2019 8:00 AM 0.00 0.0 M 0.0 M
5/16/2019 8:00 AM 0.00 0.0 M 0.0 M
5/17/2019 8:00 AM 0.00 0.0 M 0.0 M
5/18/2019 8:00 AM 0.17 0.0 M 0.0 M Started as light rain, then a brief hailstorm (.2" in diameter), then back to light rain.
5/19/2019 8:00 AM 0.00 0.0 M 0.0 M
5/22/2019 8:00 AM T 0.0 M 0.0 M a list mist during the late evening hours.
5/25/2019 8:00 AM 0.00 0.0 M 0.0 M
5/26/2019 8:00 AM 0.00 0.0 M 0.0 M
5/27/2019 8:00 AM 0.09 0.0 M 0.0 M
5/28/2019 8:00 AM 0.31 0.0 M 0.0 M Medium-sized hail (1/2"), then clearing about an hour later. At 2:00 a.m., there was a strong thunderstorm with heavy rain for a short time.
5/29/2019 8:00 AM 0.14 0.0 M 0.0 M
5/30/2019 8:00 AM 0.00 0.0 M 0.0 M
5/31/2019 8:00 AM T 0.0 M 0.0 M
6/1/2019 8:00 AM T 0.0 M 0.0 M
6/2/2019 8:00 AM T 0.0 M 0.0 M
6/3/2019 8:00 AM T 0.0 M 0.0 M
6/4/2019 8:00 AM 0.19 0.0 M 0.0 M
6/5/2019 8:00 AM 0.06 0.0 M 0.0 M
6/6/2019 8:00 AM 0.11 0.0 M 0.0 M
6/7/2019 8:00 AM T 0.0 M 0.0 M
6/8/2019 8:00 AM 0.21 0.0 M 0.0 M
6/9/2019 8:00 AM 0.04 0.0 M 0.0 M
6/10/2019 8:00 AM 0.00 0.0 M 0.0 M
6/11/2019 8:00 AM 0.00 0.0 M 0.0 M
6/12/2019 8:00 AM 0.00 0.0 M 0.0 M
6/13/2019 8:00 AM 0.00 0.0 M 0.0 M
6/14/2019 8:00 AM 0.00 0.0 M 0.0 M
6/15/2019 8:00 AM 0.00 0.0 M 0.0 M
6/16/2019 8:00 AM 0.00 0.0 M 0.0 M
6/17/2019 8:00 AM 0.34 0.0 M 0.0 M Rain, then rain mixed with very small hail. Quite a violent, but short thunderstorm with a full hour of lightning and thunder, first to the west, then passing overhead, then all the east onto the plains.
6/18/2019 8:00 AM 0.81 0.0 M 0.0 M Started with a heavy downpour of very small hailstones, then 5 minutes later, mostly heavy rain. It then cleared for about 10 minutes, and repeated this same scenario.
6/19/2019 8:00 AM 0.03 0.0 M 0.0 M
6/20/2019 8:00 AM 0.00 0.0 M 0.0 M
6/21/2019 8:00 AM T 0.0 M 0.0 M
6/22/2019 8:00 AM 1.06 0.0 M 0.0 M Most rain, with a sudden hailstorm about 10:00 pm.
6/23/2019 8:00 AM 0.00 0.0 M 0.0 M
6/24/2019 8:00 AM 0.04 0.0 M 0.0 M
6/25/2019 8:00 AM 0.00 0.0 M 0.0 M
6/26/2019 8:00 AM 0.00 0.0 M 0.0 M
6/27/2019 8:00 AM 0.00 0.0 M 0.0 M
6/28/2019 8:00 AM 0.00 0.0 M 0.0 M
6/29/2019 8:00 AM 0.00 0.0 M 0.0 M
6/30/2019 8:00 AM T 0.0 M 0.0 M
7/1/2019 8:00 AM T 0.0 M 0.0 M
7/2/2019 8:00 AM 1.04 0.0 M 0.0 M An amazingly hard rainstorm, lasting a lot longer than usual here in Boulder.
7/3/2019 8:00 AM 0.00 0.0 M 0.0 M
7/4/2019 8:00 AM 0.00 0.0 M 0.0 M
7/5/2019 8:00 AM 0.41 0.0 M 0.0 M
7/6/2019 8:00 AM 0.00 0.0 M 0.0 M
7/7/2019 8:00 AM 0.00 0.0 M 0.0 M
7/8/2019 8:00 AM 0.00 0.0 M 0.0 M
7/9/2019 8:00 AM 0.00 0.0 M 0.0 M
7/10/2019 8:00 AM 0.00 0.0 M 0.0 M
7/11/2019 8:00 AM 0.00 0.0 M 0.0 M
7/12/2019 8:00 AM 0.00 0.0 M 0.0 M
7/13/2019 8:00 AM 0.02 0.0 M 0.0 M
7/14/2019 8:00 AM 0.00 0.0 M 0.0 M
7/15/2019 8:00 AM 0.19 0.0 M 0.0 M
7/16/2019 8:00 AM 0.00 0.0 M 0.0 M
7/17/2019 8:00 AM 0.00 0.0 M 0.0 M
7/18/2019 8:00 AM 0.00 0.0 M 0.0 M
7/19/2019 8:00 AM 0.00 0.0 M 0.0 M
7/20/2019 8:00 AM 0.00 0.0 M 0.0 M
7/21/2019 8:00 AM 0.29 0.0 M 0.0 M
7/22/2019 8:00 AM 0.51 0.0 M 0.0 M
7/23/2019 8:00 AM 0.00 0.0 M 0.0 M
7/24/2019 8:00 AM 0.00 0.0 M 0.0 M
7/25/2019 8:00 AM 0.09 0.0 M 0.0 M Very short burst of light rain.
7/26/2019 8:00 AM T 0.0 M 0.0 M
7/27/2019 8:00 AM 0.00 0.0 M 0.0 M
7/28/2019 8:00 AM 0.00 0.0 M 0.0 M
7/29/2019 8:00 AM 0.00 0.0 M 0.0 M
7/30/2019 8:00 AM 0.00 0.0 M 0.0 M
7/31/2019 8:00 AM T 0.0 M 0.0 M
8/1/2019 8:00 AM 0.00 0.0 M 0.0 M
8/2/2019 8:00 AM 0.06 0.0 M 0.0 M
8/3/2019 8:00 AM 0.06 0.0 M 0.0 M
8/4/2019 8:00 AM 0.00 0.0 M 0.0 M
8/5/2019 8:00 AM 0.00 0.0 M 0.0 M
8/6/2019 8:00 AM 0.11 0.0 M 0.0 M
8/7/2019 8:00 AM 0.00 0.0 M 0.0 M
8/8/2019 8:00 AM T 0.0 M 0.0 M
8/9/2019 8:00 AM 0.12 0.0 M 0.0 M
8/10/2019 8:00 AM 0.00 0.0 M 0.0 M
8/11/2019 8:00 AM 0.00 0.0 M 0.0 M
8/12/2019 8:00 AM 0.00 0.0 M 0.0 M
8/13/2019 8:00 AM 0.00 0.0 M 0.0 M
8/14/2019 8:00 AM 0.00 0.0 M 0.0 M
8/15/2019 8:00 AM 0.00 0.0 M 0.0 M
8/16/2019 8:00 AM 0.00 0.0 M 0.0 M
8/17/2019 8:00 AM T 0.0 M 0.0 M
8/18/2019 8:00 AM 0.00 0.0 M 0.0 M
8/19/2019 8:00 AM 0.00 0.0 M 0.0 M
8/20/2019 8:00 AM 0.00 0.0 M 0.0 M
8/21/2019 8:00 AM 0.00 0.0 M 0.0 M
8/22/2019 8:00 AM T 0.0 M 0.0 M
8/23/2019 8:00 AM 0.00 0.0 M 0.0 M
8/24/2019 8:00 AM 0.00 0.0 M 0.0 M
8/25/2019 8:00 AM 0.00 0.0 M 0.0 M
8/26/2019 8:00 AM 0.00 0.0 M 0.0 M
8/27/2019 8:00 AM 0.00 0.0 M 0.0 M
8/28/2019 8:00 AM 0.00 0.0 M 0.0 M
8/29/2019 8:00 AM 0.00 0.0 M 0.0 M
8/30/2019 8:00 AM 0.00 0.0 M 0.0 M
8/31/2019 8:00 AM 0.00 0.0 M 0.0 M
9/1/2019 8:00 AM 0.00 0.0 M 0.0 M
9/2/2019 8:00 AM 0.00 0.0 M 0.0 M
9/3/2019 8:00 AM 0.00 0.0 M 0.0 M
9/4/2019 8:00 AM 0.00 0.0 M 0.0 M
9/5/2019 8:00 AM 0.03 0.0 M 0.0 M
9/6/2019 8:00 AM 0.07 0.0 M 0.0 M
9/16/2019 8:00 AM 0.00 0.0 M 0.0 M
9/17/2019 8:00 AM 0.00 0.0 M 0.0 M
9/18/2019 8:00 AM 0.00 0.0 M 0.0 M
9/19/2019 8:00 AM 0.00 0.0 M 0.0 M
9/20/2019 8:00 AM 0.00 0.0 M 0.0 M
9/21/2019 8:00 AM 0.00 0.0 M 0.0 M
9/22/2019 8:00 AM 0.00 0.0 M 0.0 M
9/23/2019 8:00 AM 0.00 0.0 M 0.0 M
9/24/2019 8:00 AM 0.00 0.0 M 0.0 M
9/25/2019 8:00 AM 0.00 0.0 M 0.0 M
9/26/2019 8:00 AM 0.00 0.0 M 0.0 M
9/27/2019 8:00 AM 0.00 0.0 M 0.0 M
9/28/2019 8:00 AM 0.36 0.0 M 0.0 M
9/29/2019 8:00 AM 0.00 0.0 M 0.0 M
9/30/2019 8:00 AM 0.00 0.0 M 0.0 M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
11/10/2018 11/12/2018 8:00 AM 3 0.64 13.3 0.75 Light, dry snow. No wind, so it fell straight with no drifting.
12/6/2018 12/07/2018 8:00 AM 2 0.06 0.8 M
1/11/2019 1/12/2019 8:00 AM 2 0.77 3.1 0.61 Started at 2:00 am on the 11th, as a light drizzle, then changed to light snow around 7:20 am. Snowed off and on all day, but never got below about 35 degrees, so there was a lot of moisture melting and soaking in.
3/13/2019 3/14/2019 8:00 AM 2 1.09 1.6 0.38 Started raining at 10:10 pm, rained overnight, became a heavy rain in the early morning. Changed to a wet, large-flaked snowstorm at 10:00 am, complete with strong, swirly winds. Cleared up early afternoon.
4/22/2019 4/23/2019 8:00 AM 2 0.74 0.0 0.00
5/3/2019 5/12/2019 8:00 AM 10 1.59 0.0 0.00 While we were on vacation, it apparently rained and snowed quite a bit.
5/20/2019 5/21/2019 8:00 AM 2 1.23 4.6 0.71 A very wet, heavy snowfall, mostly starting 9 pm and ending maybe around midnight. Broke some fairly sizeable tree limbs, not only in our backyard, but all over north Boulder.
5/23/2019 5/24/2019 8:00 AM 2 0.52 0.0 0.00 Heavy, wet snow that downed lots of limbs
9/7/2019 9/15/2019 8:00 AM 9 0.57 0.0 0.00



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