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 10 1.04 1.08 31 1.08 31 0.00 0 0 10 2 0.0 0 0
Nov 10 0.81 0.58 17 0.58 17 0.00 0 0 7 1 2.2 4 1
Dec 10 0.64 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 11 0.50 0.46 2 0.46 2 0.00 0 0 2 0 9.7 2 2
Feb 11 0.55 0.85 12 0.85 12 0.00 0 0 5 0 10.5 5 5
March 11 1.62 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 11 1.97 1.15 1 1.15 1 0.00 0 0 1 0 1.7 1 1
May 11 2.27 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 11 1.85 0.83 1 0.83 1 0.00 0 0 1 0 0.0 0 0
July 11 1.48 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 11 1.50 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 11 1.52 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 15.75" 4.95" 64 days 4.95" 64 0.00" 0 days 0 26 days 3 days 24.1" 12 days 9 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
10/1/2010 0.00
10/2/2010 0.00
10/3/2010 0.00
10/4/2010 0.00
10/5/2010 0.00
10/6/2010 0.00
10/7/2010 0.27
10/8/2010 0.02
10/9/2010 0.00
10/10/2010 0.02
10/11/2010 0.10
10/12/2010 0.14
10/13/2010 0.33
10/14/2010 0.00
10/15/2010 0.00
10/16/2010 0.00
10/17/2010 0.00
10/18/2010 T
10/19/2010 0.09
10/20/2010 0.00
10/21/2010 0.00
10/22/2010 0.00
10/23/2010 0.07
10/24/2010 T
10/25/2010 0.00
10/26/2010 0.02
10/27/2010 0.00
10/28/2010 0.00
10/29/2010 0.00
10/30/2010 0.00
10/31/2010 0.02
11/1/2010 0.10
11/2/2010 0.00
11/3/2010 0.00
11/4/2010 0.00
11/5/2010 0.00
11/6/2010 0.00
11/7/2010 0.00
11/8/2010 0.00
11/9/2010 0.00
11/10/2010 0.28
11/11/2010 0.10
11/12/2010 0.04
11/13/2010 0.00
11/14/2010 T
11/15/2010 0.02
11/16/2010 0.01
11/17/2010 0.03
11/18/2010
11/19/2010
11/20/2010
11/21/2010
11/22/2010
11/23/2010
11/24/2010
11/25/2010
11/26/2010
11/27/2010
11/28/2010
11/29/2010
11/30/2010
12/1/2010
12/2/2010
12/3/2010
12/4/2010
12/5/2010
12/6/2010
12/7/2010
12/8/2010
12/9/2010
12/10/2010
12/11/2010
12/12/2010
12/13/2010
12/14/2010
12/15/2010
12/16/2010
12/17/2010
12/18/2010
12/19/2010
12/20/2010
12/21/2010
12/22/2010
12/23/2010
12/24/2010
12/25/2010
12/26/2010
12/27/2010
12/28/2010
12/29/2010
12/30/2010
12/31/2010
Day of YearDaily PrcpMultiday Prcp
1/1/2011
1/2/2011
1/3/2011
1/4/2011
1/5/2011
1/6/2011
1/7/2011
1/8/2011
1/9/2011
1/10/2011 0.34
1/11/2011
1/12/2011
1/13/2011
1/14/2011
1/15/2011
1/16/2011
1/17/2011
1/18/2011
1/19/2011
1/20/2011 0.12
1/21/2011
1/22/2011
1/23/2011
1/24/2011
1/25/2011
1/26/2011
1/27/2011
1/28/2011
1/29/2011
1/30/2011
1/31/2011
2/1/2011 0.12
2/2/2011
2/3/2011
2/4/2011
2/5/2011
2/6/2011 0.42
2/7/2011
2/8/2011 0.14
2/9/2011 0.08
2/10/2011
2/11/2011
2/12/2011
2/13/2011
2/14/2011
2/15/2011
2/16/2011
2/17/2011 0.00
2/18/2011 0.00
2/19/2011 0.00
2/20/2011
2/21/2011 0.00
2/22/2011 0.00
2/23/2011 0.00
2/24/2011 0.00
2/25/2011 0.09
2/26/2011
2/27/2011
2/28/2011
3/1/2011
3/2/2011
3/3/2011
3/4/2011
3/5/2011
3/6/2011
3/7/2011
3/8/2011
3/9/2011
3/10/2011
3/11/2011
3/12/2011
3/13/2011
3/14/2011
3/15/2011
3/16/2011
3/17/2011
3/18/2011
3/19/2011
3/20/2011
3/21/2011
3/22/2011
3/23/2011
3/24/2011
3/25/2011
3/26/2011
3/27/2011
3/28/2011
3/29/2011
3/30/2011
3/31/2011
Day of YearDaily PrcpMultiday Prcp
4/1/2011
4/2/2011
4/3/2011
4/4/2011
4/5/2011
4/6/2011
4/7/2011
4/8/2011
4/9/2011
4/10/2011
4/11/2011
4/12/2011
4/13/2011
4/14/2011 1.15
4/15/2011
4/16/2011
4/17/2011
4/18/2011
4/19/2011
4/20/2011
4/21/2011
4/22/2011
4/23/2011
4/24/2011
4/25/2011
4/26/2011
4/27/2011
4/28/2011
4/29/2011
4/30/2011
5/1/2011
5/2/2011
5/3/2011
5/4/2011
5/5/2011
5/6/2011
5/7/2011
5/8/2011
5/9/2011
5/10/2011
5/11/2011
5/12/2011
5/13/2011
5/14/2011
5/15/2011
5/16/2011
5/17/2011
5/18/2011
5/19/2011
5/20/2011
5/21/2011
5/22/2011
5/23/2011
5/24/2011
5/25/2011
5/26/2011
5/27/2011
5/28/2011
5/29/2011
5/30/2011
5/31/2011
6/1/2011
6/2/2011
6/3/2011
6/4/2011
6/5/2011
6/6/2011
6/7/2011
6/8/2011
6/9/2011
6/10/2011
6/11/2011
6/12/2011
6/13/2011
6/14/2011
6/15/2011
6/16/2011
6/17/2011
6/18/2011
6/19/2011
6/20/2011 0.83
6/21/2011
6/22/2011
6/23/2011
6/24/2011
6/25/2011
6/26/2011
6/27/2011
6/28/2011
6/29/2011
6/30/2011
Day of YearDaily PrcpMultiday Prcp
7/1/2011
7/2/2011
7/3/2011
7/4/2011
7/5/2011
7/6/2011
7/7/2011
7/8/2011
7/9/2011
7/10/2011
7/11/2011
7/12/2011
7/13/2011
7/14/2011
7/15/2011
7/16/2011
7/17/2011
7/18/2011
7/19/2011
7/20/2011
7/21/2011
7/22/2011
7/23/2011
7/24/2011
7/25/2011
7/26/2011
7/27/2011
7/28/2011
7/29/2011
7/30/2011
7/31/2011
8/1/2011
8/2/2011
8/3/2011
8/4/2011
8/5/2011
8/6/2011
8/7/2011
8/8/2011
8/9/2011
8/10/2011
8/11/2011
8/12/2011
8/13/2011
8/14/2011
8/15/2011
8/16/2011
8/17/2011
8/18/2011
8/19/2011
8/20/2011
8/21/2011
8/22/2011
8/23/2011
8/24/2011
8/25/2011
8/26/2011
8/27/2011
8/28/2011
8/29/2011
8/30/2011
8/31/2011
9/1/2011
9/2/2011
9/3/2011
9/4/2011
9/5/2011
9/6/2011
9/7/2011
9/8/2011
9/9/2011
9/10/2011
9/11/2011
9/12/2011
9/13/2011
9/14/2011
9/15/2011
9/16/2011
9/17/2011
9/18/2011
9/19/2011
9/20/2011
9/21/2011
9/22/2011
9/23/2011
9/24/2011
9/25/2011
9/26/2011
9/27/2011
9/28/2011
9/29/2011
9/30/2011



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 0.00 0.0 M M M
10/2/2010 7:00 AM 0.00 0.0 M M M
10/3/2010 7:00 AM 0.00 0.0 M M M
10/4/2010 7:00 AM 0.00 0.0 M M M
10/5/2010 7:00 AM 0.00 0.0 M M M
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 7:00 AM 0.27 M M M M Thunderstorm around 1am last night.
10/8/2010 7:00 AM 0.02 M M M M Light rain overnight.
10/9/2010 7:00 AM 0.00 0.0 M M M
10/10/2010 7:00 AM 0.02 M M M M Light rain began after 9pm last night, still raining at ob time.
10/11/2010 7:00 AM 0.10 M M M M Light rain showers yesterday, with 0.07" at 10pm. Light rain overnight ended before ob time, with 0.03" new at 7am.
10/12/2010 7:00 AM 0.14 M M M M Light rain began overnight and continued at ob time.
10/13/2010 7:00 AM 0.33 M M M M Light rain yesterday morning.
10/14/2010 7:00 AM 0.00 0.0 M M M
10/15/2010 7:00 AM 0.00 0.0 M M M
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/18/2010 7:00 AM T M M M M Light rain shower yesterday afternoon.
10/19/2010 7:00 AM 0.09 M M M M Light rain showers yesterday afternoon and evening.
10/20/2010 7:00 AM 0.00 0.0 M M M
10/21/2010 7:00 AM 0.00 0.0 M M M
10/22/2010 7:00 AM 0.00 0.0 M M M
10/23/2010 8:00 AM 0.07 M M M M Light rain and drizzle yesterday, with 0.05" new at 10pm. Light rain and drizzle overnight, with 0.02" new at 8am.
10/24/2010 8:00 AM T M M M M Light rain shower yesterday morning.
10/25/2010 7:00 AM 0.00 0.0 M M M
10/26/2010 7:00 AM 0.02 M M M M Light rain shower yesterday morning.
10/27/2010 7:00 AM 0.00 0.0 M M M
10/28/2010 7:00 AM 0.00 0.0 M M M
10/29/2010 7:00 AM 0.00 0.0 M M M
10/30/2010 7:00 AM 0.00 0.0 M M M
10/31/2010 7:00 AM 0.02 M M M M Light rain shower yesterday evening.
11/1/2010 7:00 AM 0.10 M M M M Light rain overnight, ended before ob time.
11/2/2010 7:00 AM 0.00 0.0 M M M
11/3/2010 7:00 AM 0.00 0.0 M M M
11/4/2010 7:00 AM 0.00 0.0 M M M
11/5/2010 7:00 AM 0.00 0.0 M M M
11/6/2010 7:00 AM 0.00 0.0 M M M
11/7/2010 7:00 AM 0.00 0.0 M M M
11/8/2010 7:00 AM 0.00 0.0 M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.28 T M 0.0 M Light rain yesterday morning, light rain and snow yesterday afternoon.
11/11/2010 7:00 AM 0.10 1.3 M 0.5 M Light snow pellets yesterday evening, light snow overnight continuing at ob time.
11/12/2010 7:00 AM 0.04 0.5 M T M Light snow yesterday morning and afternoon.
11/13/2010 7:00 AM 0.00 0.0 M T M
11/14/2010 7:00 AM T T M T M Light snow showers yesterday evening.
11/15/2010 7:00 AM 0.02 0.3 M T M Light snow overnight, continued at ob time.
11/16/2010 7:00 AM 0.01 0.1 M 0.0 M Light snow yesterday morning.
11/17/2010 7:00 AM 0.03 T M 0.0 M Rain shower mixed with light snow yesterday afternoon, rain showers yesterday evening.
1/10/2011 7:00 AM 0.34 6.6 M 5.5 M Light snow all day yesterday with 5.3"/0.24" at 11pm. Light snow overnight ended before ob time, with 1.3"/0.10" new at 7am.
1/20/2011 7:00 AM 0.12 3.1 M 3.0 M Light to moderate snow yesterday afternoon and evening.
2/1/2011 7:00 AM 0.12 1.9 M 2.0 M Light snow all day.
2/6/2011 8:00 AM 0.42 5.0 M 4.0 M Light snow and snow pellet showers yesterday afternoon and evening, with 0.2"/0.03" new snow/liquid at 10pm. Light snow overnight ended before ob time, with 4.8"/0.39" new at 8am.
2/8/2011 7:00 AM 0.14 2.1 M 4.5 M Moderate snow with the frontal passage around 9:15pm, with 0.3"/0.02" of snow/liquid at 10pm. Light snow overnight continuing at ob time, with 1.8"/0.12" new at 7am.
2/9/2011 7:00 AM 0.08 0.7 M 4.0 M Light snow yesterday morning, light snow showers yesterday afternoon.
2/17/2011 7:00 AM 0.00 0.0 M M M
2/18/2011 7:00 AM 0.00 0.0 M M M
2/19/2011 7:00 AM 0.00 0.0 M M M
2/21/2011 7:00 AM 0.00 0.0 M M M
2/22/2011 7:00 AM 0.00 0.0 M M M
2/23/2011 7:00 AM 0.00 0.0 M M M
2/24/2011 7:00 AM 0.00 0.0 M M M
2/25/2011 7:00 AM 0.09 0.8 M 0.5 M Light snow yesterday evening with 0.3"/0.03" liquid at 11pm. Light snow overnight with 0.5"/0.06" new at 7:30am. Light snow at ob time.
4/14/2011 7:00 AM 1.15 1.7 M 1.5 M Light rain yesterday evening, with 0.26" new at 10pm. Light rain changed to light snow overnight, with 1.7"/0.89" new at 7am. Light snow at ob time.
6/20/2011 7:00 AM 0.83 M M M M Showers and thundershowers yesterday evening, with 0.06" at 10pm. Showers and thundershowers overnight, with 0.77" at 7am.



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