Station Overview Station Location
Station Number CO-BO-464 Latitude 39.98062
Station Name Boulder 3.2 S Longitude -105.249726
County Boulder Elevation (ft) 5476



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 19 1.38 0.93 3 0.93 3 0.00 0 0 3 0 16.2 4 0
Nov 19 1.07 1.64 2 1.64 2 0.00 0 0 2 0 19.9 2 0
Dec 19 0.84 0.12 1 0.12 1 0.00 0 0 1 0 2.4 1 0
Jan 20 0.67 0.00 2 0.00 2 0.00 0 0 0 2 0.0 0 0
Feb 20 0.66 0.00 1 0.00 1 0.00 0 0 0 1 0.0 0 0
March 20 1.90 2.15 6 2.15 6 0.00 0 0 6 0 9.5 2 1
April 20 2.40 2.85 12 2.85 12 0.00 0 0 9 1 27.5 5 2
May 20 2.71 2.22 15 2.22 15 0.00 0 0 10 5 0.0 0 0
June 20 2.23 2.45 14 2.45 14 0.00 0 0 12 2 0.0 0 0
July 20 1.67 0.70 14 0.70 14 0.00 0 0 8 5 0.0 0 0
Aug 20 1.93 0.42 29 0.42 29 0.00 0 0 7 5 0.0 0 0
Sept 20 1.63 1.59 29 1.59 29 0.00 0 0 5 2 4.2 1 0
Water Year Totals: 19.09" 15.07" 128 days 15.07" 128 0.00" 0 days 0 63 days 23 days 79.7" 15 days 3 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
10/1/2019
10/2/2019
10/3/2019
10/4/2019
10/5/2019
10/6/2019
10/7/2019
10/8/2019
10/9/2019
10/10/2019
10/11/2019
10/12/2019
10/13/2019
10/14/2019
10/15/2019
10/16/2019
10/17/2019
10/18/2019
10/19/2019
10/20/2019
10/21/2019
10/22/2019
10/23/2019
10/24/2019 M
10/25/2019
10/26/2019
10/27/2019 0.24
10/28/2019 0.45
10/29/2019 0.24
10/30/2019
10/31/2019
11/1/2019
11/2/2019
11/3/2019
11/4/2019
11/5/2019
11/6/2019
11/7/2019
11/8/2019
11/9/2019
11/10/2019
11/11/2019 0.16
11/12/2019
11/13/2019
11/14/2019
11/15/2019
11/16/2019
11/17/2019
11/18/2019
11/19/2019
11/20/2019
11/21/2019
11/22/2019
11/23/2019
11/24/2019
11/25/2019
11/26/2019 1.48
11/27/2019
11/28/2019
11/29/2019
11/30/2019
12/1/2019
12/2/2019
12/3/2019
12/4/2019
12/5/2019
12/6/2019
12/7/2019
12/8/2019
12/9/2019
12/10/2019
12/11/2019
12/12/2019
12/13/2019
12/14/2019
12/15/2019
12/16/2019
12/17/2019
12/18/2019
12/19/2019
12/20/2019
12/21/2019
12/22/2019
12/23/2019
12/24/2019
12/25/2019
12/26/2019
12/27/2019
12/28/2019 0.12
12/29/2019
12/30/2019
12/31/2019
Day of YearDaily PrcpMultiday Prcp
1/1/2020
1/2/2020
1/3/2020
1/4/2020
1/5/2020
1/6/2020
1/7/2020
1/8/2020
1/9/2020
1/10/2020
1/11/2020
1/12/2020
1/13/2020
1/14/2020
1/15/2020
1/16/2020
1/17/2020
1/18/2020
1/19/2020
1/20/2020
1/21/2020
1/22/2020
1/23/2020
1/24/2020
1/25/2020
1/26/2020
1/27/2020
1/28/2020
1/29/2020
1/30/2020 T
1/31/2020 T
2/1/2020
2/2/2020
2/3/2020 T
2/4/2020
2/5/2020
2/6/2020
2/7/2020
2/8/2020
2/9/2020
2/10/2020
2/11/2020
2/12/2020
2/13/2020
2/14/2020
2/15/2020
2/16/2020
2/17/2020
2/18/2020
2/19/2020
2/20/2020
2/21/2020
2/22/2020
2/23/2020
2/24/2020
2/25/2020
2/26/2020
2/27/2020
2/28/2020
2/29/2020
3/1/2020
3/2/2020
3/3/2020
3/4/2020
3/5/2020
3/6/2020
3/7/2020
3/8/2020
3/9/2020 0.14
3/10/2020
3/11/2020
3/12/2020
3/13/2020
3/14/2020
3/15/2020
3/16/2020
3/17/2020 M
3/18/2020
3/19/2020 0.15
3/20/2020 1.36
3/21/2020 0.01
3/22/2020
3/23/2020
3/24/2020
3/25/2020
3/26/2020
3/27/2020
3/28/2020 0.48
3/29/2020
3/30/2020
3/31/2020 0.01
Day of YearDaily PrcpMultiday Prcp
4/1/2020
4/2/2020 0.05
4/3/2020 0.12
4/4/2020 T
4/5/2020
4/6/2020
4/7/2020
4/8/2020
4/9/2020
4/10/2020
4/11/2020
4/12/2020 0.30
4/13/2020 0.45
4/14/2020 0.13
4/15/2020
4/16/2020 1.16
4/17/2020 0.56
4/18/2020
4/19/2020
4/20/2020
4/21/2020
4/22/2020
4/23/2020
4/24/2020 0.03
4/25/2020 0.05
4/26/2020 0.00
4/27/2020 0.00
4/28/2020
4/29/2020
4/30/2020
5/1/2020 T
5/2/2020 T
5/3/2020 0.16
5/4/2020 0.06
5/5/2020
5/6/2020
5/7/2020
5/8/2020 0.02
5/9/2020
5/10/2020
5/11/2020
5/12/2020 0.09
5/13/2020
5/14/2020
5/15/2020 0.35
5/16/2020 0.08
5/17/2020
5/18/2020
5/19/2020
5/20/2020
5/21/2020
5/22/2020
5/23/2020
5/24/2020 T
5/25/2020 1.18
5/26/2020 T
5/27/2020
5/28/2020 0.10
5/29/2020 0.03
5/30/2020 T
5/31/2020 0.15
6/1/2020 0.03
6/2/2020
6/3/2020 0.06
6/4/2020
6/5/2020 0.01
6/6/2020 0.01
6/7/2020 0.09
6/8/2020
6/9/2020 0.28
6/10/2020
6/11/2020
6/12/2020
6/13/2020
6/14/2020 T
6/15/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020 0.93
6/20/2020 0.02
6/21/2020
6/22/2020 0.20
6/23/2020
6/24/2020
6/25/2020 0.07
6/26/2020 T
6/27/2020 0.73
6/28/2020
6/29/2020 0.02
6/30/2020
Day of YearDaily PrcpMultiday Prcp
7/1/2020 0.06
7/2/2020
7/3/2020
7/4/2020
7/5/2020
7/6/2020 T
7/7/2020
7/8/2020
7/9/2020
7/10/2020
7/11/2020
7/12/2020
7/13/2020 T
7/14/2020 0.12
7/15/2020 0.03
7/16/2020
7/17/2020
7/18/2020
7/19/2020 T
7/20/2020 T
7/21/2020
7/22/2020
7/23/2020 0.04
7/24/2020
7/25/2020 0.33
7/26/2020 0.08
7/27/2020 T
7/28/2020
7/29/2020 0.03
7/30/2020 0.00
7/31/2020 0.01
8/1/2020 0.06
8/2/2020 T
8/3/2020 T
8/4/2020
8/5/2020 T
8/6/2020 0.26
8/7/2020 0.01
8/8/2020 0.00
8/9/2020 0.00
8/10/2020 0.00
8/11/2020 0.00
8/12/2020 0.00
8/13/2020 0.00
8/14/2020 0.00
8/15/2020 0.00
8/16/2020 0.00
8/17/2020 0.00
8/18/2020 0.00
8/19/2020 0.00
8/20/2020 0.00
8/21/2020 0.02
8/22/2020 0.00
8/23/2020
8/24/2020 0.00
8/25/2020 0.00
8/26/2020 0.00
8/27/2020 T
8/28/2020 0.01
8/29/2020 0.05
8/30/2020 0.01
8/31/2020 T
9/1/2020 0.10
9/2/2020 0.00
9/3/2020
9/4/2020 0.00
9/5/2020 0.00
9/6/2020 0.00
9/7/2020 0.00
9/8/2020 0.27
9/9/2020 1.12
9/10/2020 0.09
9/11/2020 0.00
9/12/2020 0.00
9/13/2020 0.00
9/14/2020 0.00
9/15/2020 0.00
9/16/2020 0.00
9/17/2020 0.00
9/18/2020 0.00
9/19/2020 0.00
9/20/2020 0.00
9/21/2020 T
9/22/2020 0.00
9/23/2020 T
9/24/2020 0.00
9/25/2020 0.00
9/26/2020 0.00
9/27/2020 0.00
9/28/2020 0.01
9/29/2020 0.00
9/30/2020 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/24/2019 7:00 AM M 6.8 M M M
10/27/2019 7:15 AM 0.24 0.2 M M M Snow over interior icing weighed after removing 0.2" equivalent weight of icing from outside of cylinder
10/28/2019 7:00 AM 0.45 7.0 M M M
10/29/2019 7:15 AM 0.24 2.2 M M M
11/11/2019 7:00 AM 0.16 3.4 M M M
11/26/2019 7:00 AM 1.48 16.5 M M M
12/28/2019 8:00 AM 0.12 2.4 M M M
1/30/2020 7:00 AM T 0.0 0.00 M M Average one piece of 2 to 3 mm grapple per sq cm.
1/31/2020 7:00 AM T M M M M Brief snow showers mid-morning and late afternoon. No accumulation.
2/3/2020 7:00 AM T M M M M Thin glaze
3/9/2020 7:00 AM 0.14 M M M M
3/17/2020 8:30 AM M M M M M {EDIT: Observer reported 0.13 for new precip. QPE data and surrounding reports of 0.01's indicate this could be a multi-day report. Changed report of 0.13 to NA until observer can be contacted to verify. Submission Time Before EDIT: 3/17/2020 9:21 AM CoCoSTAFF DNT}
3/19/2020 7:00 AM 0.15 M M M M
3/20/2020 7:00 AM 1.36 7.9 M M M
3/21/2020 7:00 AM 0.01 M M 7.0 M Light snow showers in afternoon
3/28/2020 7:00 AM 0.48 1.6 M M M
3/31/2020 7:00 AM 0.01 M M M M Short, sharp late afternoon shower with small hail mixed in
4/2/2020 7:00 AM 0.05 M M M M
4/3/2020 7:00 AM 0.12 0.2 M M M
4/4/2020 7:00 AM T M M M M Lightest possible snow flurry mid-morning
4/12/2020 7:00 AM 0.30 5.0 M M M
4/13/2020 7:00 AM 0.45 5.6 M 10.6 0.82
4/14/2020 7:00 AM 0.13 M M M M
4/16/2020 7:00 AM 1.16 11.2 M M M Boulder breaks its all-time Season snowfall record.
4/17/2020 7:00 AM 0.56 5.5 M 13.5 M
4/24/2020 7:00 AM 0.03 M M M M Overnight, Thursday into Friday
4/25/2020 7:00 AM 0.05 M M M M
4/26/2020 7:00 AM 0.00 0.0 M M M
4/27/2020 7:00 AM 0.00 0.0 M M M
5/1/2020 7:00 AM T M M M M
5/2/2020 7:00 AM T M M M M
5/3/2020 7:00 AM 0.16 M M M M
5/4/2020 7:00 AM 0.06 M M M M
5/8/2020 7:00 AM 0.02 M M M M
5/12/2020 7:00 AM 0.09 M M M M
5/15/2020 7:00 AM 0.35 M M M M
5/16/2020 7:00 AM 0.08 M M M M
5/24/2020 7:00 AM T M M M M
5/25/2020 7:00 AM 1.18 M M M M
5/26/2020 7:00 AM T M M M M Late afternoon virga from some gray clouds
5/28/2020 7:00 AM 0.10 M M M M
5/29/2020 7:00 AM 0.03 M M M M
5/30/2020 7:00 AM T M M M M
5/31/2020 7:00 AM 0.15 M M M M
6/1/2020 7:00 AM 0.03 M M M M
6/3/2020 7:00 AM 0.06 M M M M
6/5/2020 7:00 AM 0.01 M M M M Vicious winds and rain for less than five minutes at lunchtime.
6/6/2020 7:00 AM 0.01 M M M M
6/7/2020 7:00 AM 0.09 M M M M
6/9/2020 7:00 AM 0.28 M M M M
6/14/2020 7:00 AM T M M M M
6/19/2020 7:00 AM 0.93 M M M M
6/20/2020 7:00 AM 0.02 M M M M
6/22/2020 7:00 AM 0.20 M M M M
6/25/2020 7:00 AM 0.07 M M M M
6/26/2020 7:00 AM T M M M M
6/27/2020 7:00 AM 0.73 M M M M
6/29/2020 7:00 AM 0.02 M M M M
7/1/2020 7:00 AM 0.06 M M M M
7/6/2020 7:00 AM T M M M M
7/13/2020 7:00 AM T M M M M
7/14/2020 7:00 AM 0.12 M M M M
7/15/2020 7:00 AM 0.03 M M M M
7/19/2020 7:00 AM T M M M M
7/20/2020 7:00 AM T M M M M
7/23/2020 7:00 AM 0.04 M M M M
7/25/2020 7:00 AM 0.33 M M M M
7/26/2020 7:00 AM 0.08 M M M M
7/27/2020 7:00 AM T M M M M
7/29/2020 7:00 AM 0.03 M M M M
7/30/2020 7:00 AM 0.00 0.0 M M M
7/31/2020 7:00 AM 0.01 M M M M
8/1/2020 7:00 AM 0.06 M M M M
8/2/2020 7:00 AM T M M M M
8/3/2020 7:00 AM T M M M M
8/5/2020 7:00 AM T M M M M
8/6/2020 7:00 AM 0.26 M M M M
8/7/2020 7:00 AM 0.01 M M M M
8/8/2020 7:00 AM 0.00 0.0 M M M
8/9/2020 7:00 AM 0.00 0.0 M M M
8/10/2020 7:00 AM 0.00 0.0 M M M
8/11/2020 7:00 AM 0.00 0.0 M M M
8/12/2020 7:00 AM 0.00 0.0 M M M
8/13/2020 7:00 AM 0.00 0.0 M M M
8/14/2020 7:00 AM 0.00 0.0 M M M
8/15/2020 7:00 AM 0.00 0.0 M M M
8/16/2020 7:00 AM 0.00 0.0 M M M Fall of ash overnight
8/17/2020 7:00 AM 0.00 0.0 M M M
8/18/2020 7:00 AM 0.00 0.0 M M M
8/19/2020 7:00 AM 0.00 0.0 M M M
8/20/2020 7:00 AM 0.00 0.0 M M M
8/21/2020 7:00 AM 0.02 M M M M
8/22/2020 7:00 AM 0.00 0.0 M M M
8/24/2020 7:00 AM 0.00 0.0 M M M
8/25/2020 7:00 AM 0.00 0.0 M M M
8/26/2020 7:00 AM 0.00 0.0 M M M
8/27/2020 7:00 AM T M M M M Spotty rain from high cloudbase for nearly two hours in mid-late afternoon; some limited thunder.
8/28/2020 7:00 AM 0.01 M M M M
8/29/2020 7:00 AM 0.05 M M M M
8/30/2020 7:00 AM 0.01 M M M M
8/31/2020 7:00 AM T M M M M Big drops at 22:30 hrs.
9/1/2020 7:00 AM 0.10 M M M M
9/2/2020 7:00 AM 0.00 0.0 M M M
9/4/2020 7:00 AM 0.00 0.0 M M M
9/5/2020 7:00 AM 0.00 0.0 M M M
9/6/2020 7:00 AM 0.00 0.0 M M M
9/7/2020 7:00 AM 0.00 0.0 M M M Gray and black ash from the Cameron Peak fire on patio furniture, cars, etc.
9/8/2020 7:00 AM 0.27 M M M M Turning to sleet around 07:00
9/9/2020 7:00 AM 1.12 4.2 M M M Snow measured on rear spoiler on SUV. Very hard to measure anywhere else. Spoiler less affected by residual ground heat.
9/10/2020 7:00 AM 0.09 M M M M Misty light drizzle all morning on the 9th.
9/11/2020 7:00 AM 0.00 0.0 M M M
9/12/2020 7:00 AM 0.00 0.0 M M M
9/13/2020 7:00 AM 0.00 0.0 M M M
9/14/2020 7:00 AM 0.00 0.0 M M M
9/15/2020 7:00 AM 0.00 0.0 M M M
9/16/2020 7:00 AM 0.00 0.0 M M M
9/17/2020 7:00 AM 0.00 0.0 M M M
9/18/2020 7:00 AM 0.00 0.0 M M M
9/19/2020 7:00 AM 0.00 0.0 M M M
9/20/2020 7:00 AM 0.00 0.0 M M M
9/21/2020 7:00 AM T M M M M A few afternoon drops from high cumulus. Sky above was turning blue as the drops hit the ground.
9/22/2020 7:00 AM 0.00 0.0 M M M
9/23/2020 7:00 AM T M M M M A few drops around 5 pm.
9/24/2020 7:00 AM 0.00 0.0 M M M
9/25/2020 7:00 AM 0.00 0.0 M M M
9/26/2020 7:00 AM 0.00 0.0 M M M
9/27/2020 7:00 AM 0.00 0.0 M M M
9/28/2020 7:00 AM 0.01 M M M M
9/29/2020 7:00 AM 0.00 0.0 M M M
9/30/2020 7:00 AM 0.00 0.0 M M M



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