Station Overview Station Location
Station Number CO-BO-118 Latitude 40.1832
Station Name Longmont 2.9 WNW Longitude -105.1516
County Boulder Elevation (ft) 5098



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 0.98 0.83 7 0.83 7 0.00 0 0 6 1 0.0 0 0
Nov 18 0.79 0.04 1 0.04 1 0.00 0 0 1 0 0.0 0 0
Dec 18 0.56 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 19 0.35 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 19 0.46 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 19 1.48 0.23 2 0.23 2 0.00 0 0 2 0 0.0 0 0
April 19 1.79 0.30 2 0.30 2 0.00 0 0 2 0 0.0 0 0
May 19 2.33 1.70 7 1.70 7 0.00 0 0 7 0 2.0 1 0
June 19 1.74 1.61 11 1.61 11 0.00 0 0 6 0 0.0 0 0
July 19 1.26 1.89 13 1.89 13 0.00 0 0 6 2 0.0 0 0
Aug 19 1.38 0.61 8 0.61 8 0.00 0 0 4 3 0.0 0 0
Sept 19 1.32 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 14.44" 7.21" 51 days 7.21" 51 0.00" 0 days 0 34 days 6 days 2.0" 1 days 0 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
10/2/2018
10/3/2018
10/4/2018 0.01
10/5/2018 0.11
10/6/2018 0.05
10/7/2018 T
10/8/2018 0.30
10/9/2018 0.10
10/10/2018
10/11/2018 0.26
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
10/28/2018
10/29/2018
10/30/2018
10/31/2018
11/1/2018
11/2/2018
11/3/2018
11/4/2018
11/5/2018
11/6/2018
11/7/2018
11/8/2018
11/9/2018
11/10/2018
11/11/2018
11/12/2018
11/13/2018
11/14/2018
11/15/2018
11/16/2018
11/17/2018 0.04
11/18/2018
11/19/2018
11/20/2018
11/21/2018
11/22/2018
11/23/2018
11/24/2018
11/25/2018
11/26/2018
11/27/2018
11/28/2018
11/29/2018
11/30/2018
12/1/2018
12/2/2018
12/3/2018
12/4/2018
12/5/2018
12/6/2018
12/7/2018
12/8/2018
12/9/2018
12/10/2018
12/11/2018
12/12/2018
12/13/2018
12/14/2018
12/15/2018
12/16/2018
12/17/2018
12/18/2018
12/19/2018
12/20/2018
12/21/2018
12/22/2018
12/23/2018
12/24/2018
12/25/2018
12/26/2018
12/27/2018
12/28/2018
12/29/2018
12/30/2018
12/31/2018
Day of YearDaily PrcpMultiday Prcp
1/1/2019
1/2/2019
1/3/2019
1/4/2019
1/5/2019
1/6/2019
1/7/2019
1/8/2019
1/9/2019
1/10/2019
1/11/2019
1/12/2019
1/13/2019
1/14/2019
1/15/2019
1/16/2019
1/17/2019
1/18/2019
1/19/2019
1/20/2019
1/21/2019
1/22/2019
1/23/2019
1/24/2019
1/25/2019
1/26/2019
1/27/2019
1/28/2019
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/2/2019
2/3/2019
2/4/2019
2/5/2019
2/6/2019
2/7/2019
2/8/2019
2/9/2019
2/10/2019
2/11/2019
2/12/2019
2/13/2019
2/14/2019
2/15/2019
2/16/2019
2/17/2019
2/18/2019
2/19/2019
2/20/2019
2/21/2019
2/22/2019
2/23/2019
2/24/2019
2/25/2019
2/26/2019
2/27/2019
2/28/2019
3/1/2019
3/2/2019
3/3/2019
3/4/2019
3/5/2019
3/6/2019
3/7/2019
3/8/2019
3/9/2019
3/10/2019
3/11/2019
3/12/2019
3/13/2019 0.17
3/14/2019
3/15/2019
3/16/2019
3/17/2019
3/18/2019
3/19/2019
3/20/2019
3/21/2019
3/22/2019
3/23/2019
3/24/2019
3/25/2019
3/26/2019
3/27/2019
3/28/2019
3/29/2019 0.06
3/30/2019
3/31/2019
Day of YearDaily PrcpMultiday Prcp
4/1/2019
4/2/2019
4/3/2019
4/4/2019
4/5/2019
4/6/2019
4/7/2019
4/8/2019
4/9/2019
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
4/19/2019
4/20/2019
4/21/2019
4/22/2019 0.27
4/23/2019 0.03
4/24/2019
4/25/2019
4/26/2019
4/27/2019
4/28/2019
4/29/2019
4/30/2019
5/1/2019
5/2/2019
5/3/2019
5/4/2019
5/5/2019
5/6/2019
5/7/2019 0.05
5/8/2019 0.20
5/9/2019
5/10/2019
5/11/2019
5/12/2019
5/13/2019
5/14/2019
5/15/2019
5/16/2019
5/17/2019
5/18/2019
5/19/2019
5/20/2019 0.26
5/21/2019 0.88
5/22/2019
5/23/2019 0.09
5/24/2019
5/25/2019
5/26/2019
5/27/2019
5/28/2019 0.21
5/29/2019 0.01
5/30/2019
5/31/2019
6/1/2019
6/2/2019
6/3/2019
6/4/2019
6/5/2019
6/6/2019 0.09
6/7/2019
6/8/2019
6/9/2019
6/10/2019
6/11/2019
6/12/2019
6/13/2019
6/14/2019 0.00
6/15/2019 0.00
6/16/2019 0.00
6/17/2019 0.04
6/18/2019 0.11
6/19/2019 0.15
6/20/2019 0.00
6/21/2019 0.00
6/22/2019 1.06
6/23/2019 0.16
6/24/2019
6/25/2019
6/26/2019
6/27/2019
6/28/2019
6/29/2019
6/30/2019
Day of YearDaily PrcpMultiday Prcp
7/1/2019
7/2/2019 0.83
7/3/2019 0.00
7/4/2019 0.00
7/5/2019 0.22
7/6/2019 0.38
7/7/2019 0.00
7/8/2019 0.01
7/9/2019 T
7/10/2019
7/11/2019 0.00
7/12/2019
7/13/2019
7/14/2019 T
7/15/2019
7/16/2019 0.20
7/17/2019
7/18/2019
7/19/2019
7/20/2019
7/21/2019 0.25
7/22/2019 0.00
7/23/2019
7/24/2019
7/25/2019
7/26/2019
7/27/2019
7/28/2019
7/29/2019
7/30/2019
7/31/2019
8/1/2019
8/2/2019
8/3/2019
8/4/2019
8/5/2019
8/6/2019
8/7/2019
8/8/2019 0.10
8/9/2019 T
8/10/2019 0.35
8/11/2019
8/12/2019 T
8/13/2019
8/14/2019 0.14
8/15/2019
8/16/2019 0.00
8/17/2019
8/18/2019
8/19/2019
8/20/2019
8/21/2019
8/22/2019 0.02
8/23/2019 T
8/24/2019
8/25/2019
8/26/2019
8/27/2019
8/28/2019
8/29/2019
8/30/2019
8/31/2019
9/1/2019
9/2/2019
9/3/2019
9/4/2019
9/5/2019
9/6/2019
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
9/16/2019
9/17/2019
9/18/2019
9/19/2019
9/20/2019
9/21/2019
9/22/2019
9/23/2019
9/24/2019
9/25/2019
9/26/2019
9/27/2019
9/28/2019
9/29/2019
9/30/2019



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/4/2018 7:00 AM 0.01 M M M M
10/5/2018 7:00 AM 0.11 M M M M
10/6/2018 7:00 AM 0.05 M M M M
10/7/2018 7:00 AM T 0.0 M M M
10/8/2018 7:00 AM 0.30 M M M M
10/9/2018 7:00 AM 0.10 M M M M
10/11/2018 7:00 AM 0.26 T M M M
11/17/2018 7:00 AM 0.04 M M M M Drizzle and rain
3/13/2019 7:00 AM 0.17 M M M M Just rain so far
3/29/2019 7:00 AM 0.06 M M M M
4/22/2019 7:00 AM 0.27 M M M M
4/23/2019 7:00 AM 0.03 M M M M
5/7/2019 7:00 AM 0.05 M M M M
5/8/2019 7:00 AM 0.20 M M M M
5/20/2019 7:00 AM 0.26 M M M M
5/21/2019 7:00 AM 0.88 2.0 M M M Snow amount is approximate. Did not take a core. Just let the snow melt into the gauge over the next 24 hours. A good bit of this event was rain. Same pea-sized hail at one point.
5/23/2019 7:00 AM 0.09 M M M M
5/28/2019 7:00 AM 0.21 M M M M
5/29/2019 7:00 AM 0.01 M M M M
6/6/2019 7:00 AM 0.09 M M M M
6/14/2019 7:00 AM 0.00 0.0 M M M
6/15/2019 7:00 AM 0.00 0.0 M M M
6/16/2019 7:00 AM 0.00 0.0 M M M
6/17/2019 7:00 AM 0.04 M M M M
6/18/2019 7:00 AM 0.11 M M M M
6/19/2019 7:00 AM 0.15 M M M M
6/20/2019 7:00 AM 0.00 0.0 M M M
6/21/2019 7:00 AM 0.00 0.0 M M M
6/22/2019 7:00 AM 1.06 M M M M
6/23/2019 7:00 AM 0.16 M M M M
7/2/2019 7:00 AM 0.83 M M M M
7/3/2019 7:00 AM 0.00 0.0 M M M
7/4/2019 7:00 AM 0.00 0.0 M M M
7/5/2019 7:00 AM 0.22 M M M M
7/6/2019 7:00 AM 0.38 M M M M
7/7/2019 7:00 AM 0.00 0.0 M M M
7/8/2019 7:00 AM 0.01 M M M M
7/9/2019 7:00 AM T M M M M
7/11/2019 7:00 AM 0.00 0.0 M M M
7/14/2019 7:00 AM T M M M M
7/16/2019 7:00 AM 0.20 M M M M Heavy downpour. The 0.20" value seems like an underestimate, given how hard it rained and for how long. My guess is that the rainfall was closer to 0.4-0.5" and this is corroborated by a nearby automated station that reported 0.38". Street flooding was evident with this event.
7/21/2019 7:00 AM 0.25 M M M M
7/22/2019 7:00 AM 0.00 0.0 M M M
8/8/2019 7:00 AM 0.10 M M M M Nice little batch of thunderstorms. Good lightning display.
8/9/2019 7:00 AM T M M M M
8/10/2019 7:00 AM 0.35 M M M M Torrential rain started just after 8pm. Strong winds, lots of thunder, no hail. Seemed monsoon-like. Second round of very light rain early this morning, around 6am, accounted for 0.01 of the 0.35 total.
8/12/2019 7:00 AM T M M M M
8/14/2019 7:00 AM 0.14 M M M M VERY localized, unusual storm. Pouring rain, nearly an inch per hour for a short period, yet the moon was clearly visible in the southern sky. Never seen that before! Radar showed this system develop rapidly and in a semi-linear fashion oriented west to east.
8/16/2019 7:00 AM 0.00 0.0 M M M
8/22/2019 7:00 AM 0.02 M M M M
8/23/2019 7:00 AM T M 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