Station Overview Station Location
Station Number CO-BO-76 Latitude 40.0786
Station Name Niwot 1.8 SSW Longitude -105.1808
County Boulder Elevation (ft) 5190



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 11 1.04 0.02 1 0.02 1 0.00 0 0 1 0 0.0 0 0
Nov 11 0.81 0.98 12 0.98 12 0.00 0 0 3 0 9.3 3 4
Dec 11 0.64 1.66 8 1.66 8 0.00 0 0 7 0 27.3 7 8
Jan 12 0.50 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 12 0.55 1.50 7 1.50 7 0.00 0 0 3 1 24.3 3 5
March 12 1.62 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 12 1.97 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 12 2.27 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 12 1.85 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 12 1.48 1.16 2 1.16 2 0.00 0 0 2 0 0.0 0 0
Aug 12 1.50 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 12 1.52 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 15.75" 5.32" 30 days 5.32" 30 0.00" 0 days 0 16 days 1 days 60.9" 13 days 17 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
10/1/2011
10/2/2011
10/3/2011
10/4/2011
10/5/2011
10/6/2011
10/7/2011
10/8/2011 0.02
10/9/2011
10/10/2011
10/11/2011
10/12/2011
10/13/2011
10/14/2011
10/15/2011
10/16/2011
10/17/2011
10/18/2011
10/19/2011
10/20/2011
10/21/2011
10/22/2011
10/23/2011
10/24/2011
10/25/2011
10/26/2011
10/27/2011
10/28/2011
10/29/2011
10/30/2011
10/31/2011
11/1/2011 0.00
11/2/2011 0.92
11/3/2011 0.04
11/4/2011 0.00
11/5/2011 0.00
11/6/2011
11/7/2011
11/8/2011
11/9/2011
11/10/2011
11/11/2011
11/12/2011
11/13/2011 0.00
11/14/2011 0.00
11/15/2011 0.00
11/16/2011 0.00
11/17/2011 0.00
11/18/2011 0.00
11/19/2011 0.02
11/20/2011
11/21/2011
11/22/2011
11/23/2011
11/24/2011
11/25/2011
11/26/2011
11/27/2011
11/28/2011
11/29/2011
11/30/2011
12/1/2011 0.36
12/2/2011 0.11
12/3/2011 0.29
12/4/2011 0.03
12/5/2011 0.01
12/6/2011 0.00
12/7/2011
12/8/2011
12/9/2011
12/10/2011
12/11/2011
12/12/2011
12/13/2011
12/14/2011
12/15/2011
12/16/2011
12/17/2011
12/18/2011
12/19/2011
12/20/2011
12/21/2011
12/22/2011 0.78
12/23/2011 0.08
12/24/2011
12/25/2011
12/26/2011
12/27/2011
12/28/2011
12/29/2011
12/30/2011
12/31/2011
Day of YearDaily PrcpMultiday Prcp
1/1/2012
1/2/2012
1/3/2012
1/4/2012
1/5/2012
1/6/2012
1/7/2012
1/8/2012
1/9/2012
1/10/2012
1/11/2012
1/12/2012
1/13/2012
1/14/2012
1/15/2012
1/16/2012
1/17/2012
1/18/2012
1/19/2012
1/20/2012
1/21/2012
1/22/2012
1/23/2012
1/24/2012
1/25/2012
1/26/2012
1/27/2012
1/28/2012
1/29/2012
1/30/2012
1/31/2012
2/1/2012 0.00
2/2/2012 0.00
2/3/2012 1.07
2/4/2012 0.32
2/5/2012 T
2/6/2012 0.00
2/7/2012 0.11
2/8/2012
2/9/2012
2/10/2012
2/11/2012
2/12/2012
2/13/2012
2/14/2012
2/15/2012
2/16/2012
2/17/2012
2/18/2012
2/19/2012
2/20/2012
2/21/2012
2/22/2012
2/23/2012
2/24/2012
2/25/2012
2/26/2012
2/27/2012
2/28/2012
2/29/2012
3/1/2012
3/2/2012
3/3/2012
3/4/2012
3/5/2012
3/6/2012
3/7/2012
3/8/2012
3/9/2012
3/10/2012
3/11/2012
3/12/2012
3/13/2012
3/14/2012
3/15/2012
3/16/2012
3/17/2012
3/18/2012
3/19/2012
3/20/2012
3/21/2012
3/22/2012
3/23/2012
3/24/2012
3/25/2012
3/26/2012
3/27/2012
3/28/2012
3/29/2012
3/30/2012
3/31/2012
Day of YearDaily PrcpMultiday Prcp
4/1/2012
4/2/2012
4/3/2012
4/4/2012
4/5/2012
4/6/2012
4/7/2012
4/8/2012
4/9/2012
4/10/2012
4/11/2012
4/12/2012
4/13/2012
4/14/2012
4/15/2012
4/16/2012
4/17/2012
4/18/2012
4/19/2012
4/20/2012
4/21/2012
4/22/2012
4/23/2012
4/24/2012
4/25/2012
4/26/2012
4/27/2012
4/28/2012
4/29/2012
4/30/2012
5/1/2012
5/2/2012
5/3/2012
5/4/2012
5/5/2012
5/6/2012
5/7/2012
5/8/2012
5/9/2012
5/10/2012
5/11/2012
5/12/2012
5/13/2012
5/14/2012
5/15/2012
5/16/2012
5/17/2012
5/18/2012
5/19/2012
5/20/2012
5/21/2012
5/22/2012
5/23/2012
5/24/2012
5/25/2012
5/26/2012
5/27/2012
5/28/2012
5/29/2012
5/30/2012
5/31/2012
6/1/2012
6/2/2012
6/3/2012
6/4/2012
6/5/2012
6/6/2012
6/7/2012
6/8/2012
6/9/2012
6/10/2012
6/11/2012
6/12/2012
6/13/2012
6/14/2012
6/15/2012
6/16/2012
6/17/2012
6/18/2012
6/19/2012
6/20/2012
6/21/2012
6/22/2012
6/23/2012
6/24/2012
6/25/2012
6/26/2012
6/27/2012
6/28/2012
6/29/2012
6/30/2012
Day of YearDaily PrcpMultiday Prcp
7/1/2012
7/2/2012
7/3/2012
7/4/2012
7/5/2012
7/6/2012
7/7/2012 0.23
7/8/2012 0.93
7/9/2012
7/10/2012
7/11/2012
7/12/2012
7/13/2012
7/14/2012
7/15/2012
7/16/2012
7/17/2012
7/18/2012
7/19/2012
7/20/2012
7/21/2012
7/22/2012
7/23/2012
7/24/2012
7/25/2012
7/26/2012
7/27/2012
7/28/2012
7/29/2012
7/30/2012
7/31/2012
8/1/2012
8/2/2012
8/3/2012
8/4/2012
8/5/2012
8/6/2012
8/7/2012
8/8/2012
8/9/2012
8/10/2012
8/11/2012
8/12/2012
8/13/2012
8/14/2012
8/15/2012
8/16/2012
8/17/2012
8/18/2012
8/19/2012
8/20/2012
8/21/2012
8/22/2012
8/23/2012
8/24/2012
8/25/2012
8/26/2012
8/27/2012
8/28/2012
8/29/2012
8/30/2012
8/31/2012
9/1/2012
9/2/2012
9/3/2012
9/4/2012
9/5/2012
9/6/2012
9/7/2012
9/8/2012
9/9/2012
9/10/2012
9/11/2012
9/12/2012
9/13/2012
9/14/2012
9/15/2012
9/16/2012
9/17/2012
9/18/2012
9/19/2012
9/20/2012
9/21/2012
9/22/2012
9/23/2012
9/24/2012
9/25/2012
9/26/2012
9/27/2012
9/28/2012
9/29/2012
9/30/2012



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/8/2011 8:00 AM 0.02 0.0 M 0.0 M Light rain at ob time.
11/1/2011 7:00 AM 0.00 0.0 M M T
11/2/2011 8:00 AM 0.92 8.9 M 8.0 M Light rain showers yesterday afternoon. Thundershower then thunder with light snow yesterday evening, with 3.2"/0.48" new at 11pm. Light to moderate snow overnight, with 5.7"/0.44" new at 8am. Light snow at ob time.
11/3/2011 7:00 AM 0.04 0.2 M 6.5 M Light snow yesterday morning. Snow amount estimated due to melting.
11/4/2011 7:00 AM 0.00 0.0 M 4.0 M
11/5/2011 7:00 AM 0.00 0.0 M 3.0 M
11/13/2011 7:00 AM 0.00 0.0 M M M
11/14/2011 7:00 AM 0.00 0.0 M M M
11/15/2011 7:00 AM 0.00 0.0 M M M
11/16/2011 7:00 AM 0.00 0.0 M M M
11/17/2011 7:00 AM 0.00 0.0 M M M
11/18/2011 7:00 AM 0.00 0.0 M M M
11/19/2011 8:30 AM 0.02 0.2 M T M Light snow after 10pm last night, ended before ob time.
12/1/2011 7:00 AM 0.36 5.2 M 5.0 M Light rain yesterday evening with a trace at 10pm. Light rain changed to snow after 1am. Snowing at ob time.
12/2/2011 7:00 AM 0.11 1.4 M 6.0 M Light snow yesterday morning and afternoon.
12/3/2011 8:30 AM 0.29 5.8 M 9.5 M Light snow yesterday evening with 0.1"/0.01" at 10:30pm. Light snow overnight with 5.7"/0.28" new at 8:30am. Light snow at ob time.
12/4/2011 8:30 AM 0.03 0.3 M 8.0 M Light snow yesterday morning.
12/5/2011 7:00 AM 0.01 0.3 M 7.0 M Light snow yesterday evening, ended before 10pm. Min +1 F.
12/6/2011 7:00 AM 0.00 0.0 M 6.0 M Min -6F.
12/22/2011 7:00 AM 0.78 12.6 M 14.0 M Light to moderate snow yesterday evening, with 3.6"/0.20" at 8:30pm. Light to moderate snow overnight with 9.0"/0.58" new at 7am. New snow amount +/- 0.5" or so due to winds.
12/23/2011 7:00 AM 0.08 1.7 M 15.0 M Light snow yesterday morning, light snow showers yesterday early afternoon.
2/1/2012 7:00 AM 0.00 0.0 M 0.0 M
2/2/2012 7:00 AM 0.00 0.0 M 0.0 M
2/3/2012 8:00 AM 1.07 14.4 M 12.0 M Light to moderate snow yesterday evening, with 4.2"/0.28" at 11pm. Light to moderate snow overnight, with 10.2"/0.79" new at 8am. Light snow at ob time.
2/4/2012 9:00 AM 0.32 7.1 M 15.5 M Light snow showers yesterday morning and afternoon, light snow yesterday evening. 5.8"/0.23" new at 10pm. Light snow overnight with 1.3"/0.09" new at 9am. Flurries at ob time.
2/5/2012 7:00 AM T T M 12.0 M Light snow showers yesterday morning.
2/6/2012 7:00 AM 0.00 0.0 M 11.0 M
2/7/2012 7:00 AM 0.11 2.8 M 12.5 M Light snow overnight, with flurries at ob time.
7/7/2012 7:00 AM 0.23 M M M M Thundershowers yesterday afternoon and evening, with 0.11" new at 10pm. Thundershowers overnight with 0.12" new at 7am.
7/8/2012 7:00 AM 0.93 M M M M Thunderstorms with 0.92" new from 5pm to 11pm. Light rain showers overnight with 0.01" new at 8am.



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