Station Overview Station Location
Station Number NH-HL-21 Latitude 42.770833
Station Name Mason 1.9 NNW Longitude -71.7827683
County Hillsborough Elevation (ft) 1017



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 09 4.72 4.97 26 4.97 26 0.00 0 0 14 1 0.0 0 1
Nov 09 4.49 4.12 25 4.12 25 0.00 0 0 10 0 0.0 0 0
Dec 09 4.02 3.70 11 3.70 11 0.00 0 0 8 0 7.5 2 2
Jan 10 3.45 2.86 9 2.86 9 0.00 0 0 8 0 4.2 1 0
Feb 10 3.39 5.33 12 5.33 12 0.00 0 0 7 1 11.0 2 1
March 10 4.16 4.49 4 4.49 4 0.00 0 0 4 0 0.0 0 0
April 10 4.55 1.77 13 1.77 13 0.00 0 0 10 0 0.0 0 0
May 10 4.22 2.68 22 2.68 22 0.00 0 0 10 0 0.0 0 0
June 10 4.29 2.20 16 2.20 16 0.00 0 0 10 0 0.0 0 0
July 10 4.21 1.48 9 1.48 9 0.00 0 0 9 0 0.0 0 0
Aug 10 3.71 0.98 4 0.98 4 0.00 0 0 4 0 0.0 0 0
Sept 10 3.86 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 49.07" 34.58" 151 days 34.58" 151 0.00" 0 days 0 94 days 2 days 22.7" 5 days 4 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
10/1/2009
10/2/2009
10/3/2009 0.11
10/4/2009 0.37
10/5/2009 0.00
10/6/2009 0.00
10/7/2009 0.45
10/8/2009 0.27
10/9/2009 0.01
10/10/2009 0.15
10/11/2009 0.02
10/12/2009 0.00
10/13/2009 0.14
10/14/2009 0.15
10/15/2009 0.00
10/16/2009 T
10/17/2009 0.00
10/18/2009 0.00
10/19/2009 0.00
10/20/2009
10/21/2009 0.00
10/22/2009 0.00
10/23/2009 0.00
10/24/2009 0.45
10/25/2009 1.00
10/26/2009
10/27/2009
10/28/2009 0.54
10/29/2009 1.30
10/30/2009 0.00
10/31/2009 0.01
11/1/2009 0.14
11/2/2009 0.00
11/3/2009 0.00
11/4/2009 0.00
11/5/2009 0.00
11/6/2009 0.00
11/7/2009 0.00
11/8/2009
11/9/2009 0.00
11/10/2009 0.00
11/11/2009 0.00
11/12/2009 0.00
11/13/2009
11/14/2009 0.23
11/15/2009 2.07
11/16/2009 0.00
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.00
11/20/2009 0.50
11/21/2009 0.52
11/22/2009
11/23/2009
11/24/2009 0.06
11/25/2009 0.02
11/26/2009 0.10
11/27/2009 0.02
11/28/2009 0.46
11/29/2009
11/30/2009 0.00
12/1/2009 0.10
12/2/2009
12/3/2009
12/4/2009 0.03
12/5/2009
12/6/2009 0.45
12/7/2009 0.00
12/8/2009
12/9/2009
12/10/2009 1.45
12/11/2009 0.00
12/12/2009
12/13/2009
12/14/2009
12/15/2009
12/16/2009
12/17/2009
12/18/2009
12/19/2009
12/20/2009
12/21/2009
12/22/2009
12/23/2009
12/24/2009
12/25/2009
12/26/2009 0.01
12/27/2009 1.10
12/28/2009 0.45
12/29/2009 0.11
12/30/2009 0.00
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.12
1/2/2010 0.16
1/3/2010
1/4/2010
1/5/2010
1/6/2010
1/7/2010
1/8/2010
1/9/2010
1/10/2010
1/11/2010
1/12/2010
1/13/2010
1/14/2010
1/15/2010
1/16/2010
1/17/2010
1/18/2010 0.67
1/19/2010 0.22
1/20/2010 0.37
1/21/2010
1/22/2010
1/23/2010
1/24/2010
1/25/2010 0.08
1/26/2010 1.18
1/27/2010
1/28/2010
1/29/2010
1/30/2010 0.06
1/31/2010 0.00
2/1/2010 0.00
2/2/2010 0.00
2/3/2010
2/4/2010
2/5/2010
2/6/2010
2/7/2010
2/8/2010
2/9/2010
2/10/2010
2/11/2010 0.10
2/12/2010
2/13/2010
2/14/2010
2/15/2010
2/16/2010 T
2/17/2010 0.50
2/18/2010 0.00
2/19/2010
2/20/2010
2/21/2010
2/22/2010 0.00
2/23/2010
2/24/2010 0.18
2/25/2010 1.42
2/26/2010 2.61
2/27/2010 0.42
2/28/2010 0.10
3/1/2010
3/2/2010
3/3/2010 0.04
3/4/2010
3/5/2010
3/6/2010
3/7/2010
3/8/2010
3/9/2010
3/10/2010
3/11/2010
3/12/2010
3/13/2010
3/14/2010
3/15/2010
3/16/2010
3/17/2010
3/18/2010
3/19/2010
3/20/2010
3/21/2010
3/22/2010
3/23/2010
3/24/2010
3/25/2010
3/26/2010
3/27/2010
3/28/2010
3/29/2010 0.40
3/30/2010 1.40
3/31/2010 2.65
Day of YearDaily PrcpMultiday Prcp
4/1/2010 0.10
4/2/2010 0.00
4/3/2010
4/4/2010
4/5/2010
4/6/2010
4/7/2010 0.10
4/8/2010
4/9/2010 0.03
4/10/2010 0.51
4/11/2010
4/12/2010
4/13/2010
4/14/2010
4/15/2010
4/16/2010 0.17
4/17/2010 0.50
4/18/2010
4/19/2010 0.03
4/20/2010
4/21/2010 0.00
4/22/2010 0.00
4/23/2010
4/24/2010
4/25/2010
4/26/2010
4/27/2010 0.02
4/28/2010 0.21
4/29/2010 0.10
4/30/2010
5/1/2010
5/2/2010
5/3/2010
5/4/2010 0.07
5/5/2010 0.16
5/6/2010
5/7/2010
5/8/2010 0.40
5/9/2010 0.62
5/10/2010 0.00
5/11/2010 0.00
5/12/2010 0.00
5/13/2010 0.01
5/14/2010 0.11
5/15/2010 0.01
5/16/2010 0.00
5/17/2010 0.00
5/18/2010 0.00
5/19/2010 0.75
5/20/2010
5/21/2010 0.00
5/22/2010
5/23/2010 0.00
5/24/2010 0.00
5/25/2010 0.00
5/26/2010
5/27/2010 0.46
5/28/2010 0.00
5/29/2010
5/30/2010 0.09
5/31/2010 0.00
6/1/2010 0.00
6/2/2010 0.04
6/3/2010
6/4/2010
6/5/2010
6/6/2010 0.04
6/7/2010 0.25
6/8/2010 0.00
6/9/2010 0.00
6/10/2010 0.18
6/11/2010 0.61
6/12/2010
6/13/2010 0.50
6/14/2010 0.03
6/15/2010 0.04
6/16/2010
6/17/2010 0.04
6/18/2010
6/19/2010
6/20/2010 0.00
6/21/2010 0.00
6/22/2010 0.00
6/23/2010 0.47
6/24/2010
6/25/2010
6/26/2010
6/27/2010
6/28/2010
6/29/2010
6/30/2010
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010
7/4/2010
7/5/2010
7/6/2010
7/7/2010
7/8/2010
7/9/2010
7/10/2010
7/11/2010 0.27
7/12/2010
7/13/2010
7/14/2010 0.13
7/15/2010 0.19
7/16/2010
7/17/2010 0.25
7/18/2010 0.02
7/19/2010
7/20/2010 0.03
7/21/2010
7/22/2010 0.03
7/23/2010
7/24/2010 0.55
7/25/2010 0.01
7/26/2010
7/27/2010
7/28/2010
7/29/2010
7/30/2010
7/31/2010
8/1/2010
8/2/2010
8/3/2010
8/4/2010 0.02
8/5/2010
8/6/2010 0.28
8/7/2010
8/8/2010
8/9/2010
8/10/2010 0.25
8/11/2010
8/12/2010
8/13/2010 0.43
8/14/2010
8/15/2010
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010
9/2/2010
9/3/2010
9/4/2010
9/5/2010
9/6/2010
9/7/2010
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010
9/13/2010
9/14/2010
9/15/2010
9/16/2010
9/17/2010
9/18/2010
9/19/2010
9/20/2010
9/21/2010
9/22/2010
9/23/2010
9/24/2010
9/25/2010
9/26/2010
9/27/2010
9/28/2010
9/29/2010
9/30/2010



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/3/2009 7:00 AM 0.11 M M M M
10/4/2009 7:00 AM 0.37 M M M M
10/5/2009 7:00 AM 0.00 0.0 M M M
10/6/2009 7:00 AM 0.00 0.0 M M M
10/7/2009 7:00 AM 0.45 M M M M
10/8/2009 7:00 AM 0.27 M M M M
10/9/2009 7:00 AM 0.01 M M M M
10/10/2009 7:00 AM 0.15 M M M M
10/11/2009 7:00 AM 0.02 M M M M Kathy running the Chicago Marathon on her 57th Birthday today!
10/12/2009 7:00 AM 0.00 0.0 M M M
10/13/2009 7:00 AM 0.14 M M M M
10/14/2009 7:00 AM 0.15 M M M M
10/15/2009 7:00 AM 0.00 0.0 M M M
10/16/2009 7:00 AM T T 0.01 T 0.01 There was a thin layer of snow on the ground at 7AM, but nothing in the rain gauge.
10/17/2009 7:00 AM 0.00 0.0 M M M
10/18/2009 7:00 AM 0.00 0.0 M M M
10/19/2009 7:00 AM 0.00 0.0 M 1.0 M Snow and rain mixed. Got very cold very quickly, so rain gauge was brought inside during the storm to prevent possible harm to the gauge, so no accurate readings.
10/21/2009 7:00 AM 0.00 0.0 M M M
10/22/2009 7:00 AM 0.00 0.0 M M M
10/23/2009 7:00 AM 0.00 0.0 M M M
10/24/2009 7:00 AM 0.45 M M M M
10/25/2009 7:00 AM 1.00 M M M M
10/28/2009 7:00 AM 0.54 M M M M
10/29/2009 7:00 AM 1.30 M M M M
10/30/2009 7:00 AM 0.00 0.0 M M M
10/31/2009 7:00 AM 0.01 M M M M
11/1/2009 7:00 AM 0.14 M M M M
11/2/2009 7:00 AM 0.00 0.0 M M M
11/3/2009 7:00 AM 0.00 0.0 M M M
11/4/2009 7:00 AM 0.00 0.0 M M M
11/5/2009 7:00 AM 0.00 0.0 M M M
11/6/2009 7:00 AM 0.00 0.0 M M M
11/7/2009 7:00 AM 0.00 0.0 M M M
11/9/2009 7:00 AM 0.00 0.0 M M M
11/10/2009 7:00 AM 0.00 0.0 M M M
11/11/2009 7:00 AM 0.00 0.0 M M M
11/12/2009 7:00 AM 0.00 0.0 M M M
11/14/2009 7:00 AM 0.23 M M M M
11/15/2009 7:00 AM 2.07 M M M M
11/16/2009 7:00 AM 0.00 0.0 M M M
11/17/2009 7:00 AM 0.00 0.0 M M M
11/18/2009 7:00 AM 0.00 0.0 M M M
11/19/2009 7:00 AM 0.00 0.0 M M M
11/20/2009 7:00 AM 0.50 M M M M
11/21/2009 7:00 AM 0.52 M M M M
11/24/2009 7:00 AM 0.06 M M M M
11/25/2009 7:00 AM 0.02 M M M M
11/26/2009 7:00 AM 0.10 M M M M
11/27/2009 7:00 AM 0.02 M M M M
11/28/2009 7:00 AM 0.46 M M M M
11/30/2009 7:00 AM 0.00 0.0 M M M
12/1/2009 7:00 AM 0.10 M M M M
12/4/2009 7:00 AM 0.03 M M M M
12/6/2009 7:00 AM 0.45 5.5 0.45 5.5 0.45
12/7/2009 7:00 AM 0.00 0.0 M M M
12/10/2009 7:00 AM 1.45 M M M M
12/11/2009 7:00 AM 0.00 0.0 M M M
12/26/2009 7:00 AM 0.01 M M M M
12/27/2009 7:00 AM 1.10 M M M M
12/28/2009 7:00 AM 0.45 M M M M
12/29/2009 7:00 AM 0.11 2.0 0.11 4.0 M
12/30/2009 7:00 AM 0.00 0.0 M M M
1/1/2010 7:00 AM 0.12 M M M M
1/2/2010 7:00 AM 0.16 4.2 M M M Snow falling lightly
1/18/2010 7:00 AM 0.67 M M M M 6 inches of "heavy" snow
1/19/2010 7:00 AM 0.22 M M M M rain snow mix
1/20/2010 7:00 AM 0.37 M M M M ~4 inches of snow
1/25/2010 7:00 AM 0.08 M M M M
1/26/2010 7:00 AM 1.18 M M M M
1/30/2010 7:00 AM 0.06 M M M M
1/31/2010 7:00 AM 0.00 0.0 M M M
2/1/2010 7:00 AM 0.00 0.0 M M M
2/2/2010 7:00 AM 0.00 0.0 M M M
2/11/2010 7:00 AM 0.10 2.0 0.10 2.0 0.10
2/16/2010 7:00 AM T T T M M
2/17/2010 7:00 AM 0.50 M 0.50 M M
2/18/2010 7:00 AM 0.00 0.0 M M M
2/22/2010 7:00 AM 0.00 0.0 M M M
2/24/2010 7:00 AM 0.18 9.0 M M M
2/25/2010 7:00 AM 1.42 M M M M
2/26/2010 7:00 AM 2.61 M M M M
2/27/2010 7:00 AM 0.42 M M M M ~5 inches of snow
2/28/2010 7:00 AM 0.10 M M M M
3/3/2010 7:00 AM 0.04 M M M M
3/29/2010 7:00 AM 0.40 M M M M
3/30/2010 7:00 AM 1.40 M M M M
3/31/2010 7:00 AM 2.65 M M M M
4/1/2010 7:00 AM 0.10 M M M M
4/2/2010 7:00 AM 0.00 0.0 M M M
4/7/2010 7:00 AM 0.10 M M M M
4/9/2010 7:00 AM 0.03 M M M M
4/10/2010 7:00 AM 0.51 M M M M
4/16/2010 7:00 AM 0.17 M M M M
4/17/2010 7:00 AM 0.50 M M M M
4/19/2010 7:00 AM 0.03 M M M M
4/21/2010 7:00 AM 0.00 0.0 M M M
4/22/2010 7:00 AM 0.00 0.0 M M M
4/27/2010 7:00 AM 0.02 M M M M
4/28/2010 7:00 AM 0.21 M M M M
4/29/2010 7:00 AM 0.10 M M M M
5/4/2010 7:00 AM 0.07 M M M M
5/5/2010 7:00 AM 0.16 M M M M
5/8/2010 7:00 AM 0.40 M M M M
5/9/2010 7:00 AM 0.62 M M M M
5/10/2010 7:00 AM 0.00 0.0 M M M
5/11/2010 7:00 AM 0.00 0.0 M M M
5/12/2010 7:00 AM 0.00 0.0 M M M
5/13/2010 7:00 AM 0.01 M M M M
5/14/2010 7:00 AM 0.11 M M M M
5/15/2010 7:00 AM 0.01 M M M M
5/16/2010 7:00 AM 0.00 0.0 M M M
5/17/2010 7:00 AM 0.00 0.0 M M M
5/18/2010 7:00 AM 0.00 0.0 M M M
5/19/2010 7:00 AM 0.75 M M M M
5/21/2010 7:00 AM 0.00 0.0 M M M
5/23/2010 7:00 AM 0.00 0.0 M M M
5/24/2010 7:00 AM 0.00 0.0 M M M
5/25/2010 7:00 AM 0.00 0.0 M M M
5/27/2010 7:00 AM 0.46 M M M M
5/28/2010 7:00 AM 0.00 0.0 M M M
5/30/2010 7:00 AM 0.09 M M M M
5/31/2010 7:00 AM 0.00 0.0 M M M
6/1/2010 7:00 AM 0.00 0.0 M M M
6/2/2010 7:00 AM 0.04 M M M M
6/6/2010 7:00 AM 0.04 M M M M
6/7/2010 7:00 AM 0.25 M M M M
6/8/2010 7:00 AM 0.00 0.0 M M M
6/9/2010 7:00 AM 0.00 0.0 M M M
6/10/2010 7:00 AM 0.18 M M M M
6/11/2010 7:00 AM 0.61 M M M M
6/13/2010 7:00 AM 0.50 M M M M
6/14/2010 7:00 AM 0.03 M M M M
6/15/2010 7:00 AM 0.04 M M M M
6/17/2010 7:00 AM 0.04 M M M M
6/20/2010 7:00 AM 0.00 0.0 M M M
6/21/2010 7:00 AM 0.00 0.0 M M M
6/22/2010 7:00 AM 0.00 0.0 M M M
6/23/2010 7:00 AM 0.47 M M M M
7/11/2010 7:00 AM 0.27 M M M M
7/14/2010 7:00 AM 0.13 M M M M
7/15/2010 7:00 AM 0.19 M M M M
7/17/2010 7:00 AM 0.25 M M M M
7/18/2010 7:00 AM 0.02 M M M M
7/20/2010 7:00 AM 0.03 M M M M
7/22/2010 7:00 AM 0.03 M M M M
7/24/2010 7:00 AM 0.55 M M M M
7/25/2010 7:00 AM 0.01 M M M M
8/4/2010 7:00 AM 0.02 M M M M
8/6/2010 7:00 AM 0.28 M M M M
8/10/2010 7:00 AM 0.25 M M M M
8/13/2010 7:00 AM 0.43 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