Station Overview Station Location
Station Number CA-SM-17 Latitude 37.550354
Station Name San Mateo 1.2 SW Longitude -122.329503
County San Mateo Elevation (ft) 114



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 16 1.15 4.33 10 1.22 5 3.11 5 2 4 0 0.0 0 0
Nov 16 2.58 1.74 16 0.23 1 1.51 15 3 1 0 0.0 0 0
Dec 16 4.23 5.31 17 4.23 8 1.08 9 1 8 0 0.0 0 0
Jan 17 4.51 9.89 24 4.58 6 5.31 18 5 6 0 0.0 0 0
Feb 17 4.43 8.38 20 6.19 11 2.19 9 3 11 0 0.0 0 0
March 17 3.30 3.48 14 0.36 2 3.12 12 2 2 0 0.0 0 0
April 17 1.49 2.30 17 0.43 2 1.87 15 3 2 0 0.0 0 0
May 17 0.63 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 17 0.14 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 17 0.03 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 17 0.10 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 17 0.16 0.21 1 0.21 1 0.00 0 0 1 0 0.0 0 0
Water Year Totals: 22.75" 35.64" 119 days 17.45" 36 18.19" 83 days 19 35 days 0 days 0.0" 0 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
10/1/2016
10/2/2016
10/3/2016
10/4/2016
10/5/2016
10/6/2016
10/7/2016
10/8/2016
10/9/2016
10/10/2016
10/11/2016
10/12/2016
10/13/2016
10/14/2016
10/15/2016 0.47
10/16/2016 **
10/17/2016 2.14
10/18/2016
10/19/2016
10/20/2016
10/21/2016
10/22/2016
10/23/2016
10/24/2016
10/25/2016 0.03
10/26/2016 0.00
10/27/2016 0.03
10/28/2016 0.69
10/29/2016 **
10/30/2016 **
10/31/2016 0.97
11/1/2016 0.23
11/2/2016 **
11/3/2016 **
11/4/2016 **
11/5/2016 **
11/6/2016 **
11/7/2016 T
11/8/2016
11/9/2016
11/10/2016
11/11/2016
11/12/2016
11/13/2016
11/14/2016
11/15/2016
11/16/2016
11/17/2016
11/18/2016
11/19/2016 **
11/20/2016 **
11/21/2016 0.47
11/22/2016
11/23/2016 **
11/24/2016 **
11/25/2016 **
11/26/2016 **
11/27/2016 **
11/28/2016 1.04
11/29/2016
11/30/2016
12/1/2016 0.02
12/2/2016
12/3/2016
12/4/2016
12/5/2016
12/6/2016
12/7/2016
12/8/2016 1.91
12/9/2016 0.33
12/10/2016 **
12/11/2016 1.08
12/12/2016
12/13/2016
12/14/2016 0.06
12/15/2016 0.07
12/16/2016 1.11
12/17/2016
12/18/2016
12/19/2016
12/20/2016
12/21/2016
12/22/2016
12/23/2016 0.49
12/24/2016 0.24
12/25/2016 **
12/26/2016 **
12/27/2016 **
12/28/2016 **
12/29/2016 **
12/30/2016 **
12/31/2016 **
Day of YearDaily PrcpMultiday Prcp
1/1/2017 **
1/2/2017 0.12
1/3/2017 **
1/4/2017 **
1/5/2017 **
1/6/2017 1.58
1/7/2017 **
1/8/2017 **
1/9/2017 1.88
1/10/2017 0.86
1/11/2017 1.69
1/12/2017 0.28
1/13/2017 **
1/14/2017 **
1/15/2017 **
1/16/2017 **
1/17/2017 **
1/18/2017 0.05
1/19/2017 0.90
1/20/2017 0.78
1/21/2017 **
1/22/2017 **
1/23/2017 1.68
1/24/2017 0.07
1/25/2017
1/26/2017
1/27/2017
1/28/2017
1/29/2017
1/30/2017
1/31/2017
2/1/2017
2/2/2017 0.13
2/3/2017 0.38
2/4/2017 **
2/5/2017 **
2/6/2017 0.42
2/7/2017 1.73
2/8/2017 0.67
2/9/2017 0.34
2/10/2017 0.85
2/11/2017
2/12/2017
2/13/2017
2/14/2017
2/15/2017
2/16/2017 0.37
2/17/2017 0.24
2/18/2017 **
2/19/2017 **
2/20/2017 1.68
2/21/2017 1.20
2/22/2017 0.26
2/23/2017 0.02
2/24/2017
2/25/2017 **
2/26/2017 **
2/27/2017 0.09
2/28/2017
3/1/2017
3/2/2017
3/3/2017
3/4/2017 **
3/5/2017 1.20
3/6/2017 0.33
3/7/2017 0.03
3/8/2017
3/9/2017
3/10/2017
3/11/2017
3/12/2017
3/13/2017
3/14/2017
3/15/2017
3/16/2017
3/17/2017
3/18/2017 **
3/19/2017 **
3/20/2017 **
3/21/2017 **
3/22/2017 **
3/23/2017 **
3/24/2017 **
3/25/2017 **
3/26/2017 **
3/27/2017 1.92
3/28/2017
3/29/2017
3/30/2017
3/31/2017
Day of YearDaily PrcpMultiday Prcp
4/1/2017 **
4/2/2017 **
4/3/2017 **
4/4/2017 **
4/5/2017 **
4/6/2017 **
4/7/2017 **
4/8/2017 **
4/9/2017 **
4/10/2017 1.53
4/11/2017
4/12/2017 0.24
4/13/2017
4/14/2017
4/15/2017 **
4/16/2017 **
4/17/2017 0.18
4/18/2017 0.19
4/19/2017 **
4/20/2017 0.16
4/21/2017
4/22/2017
4/23/2017
4/24/2017
4/25/2017
4/26/2017
4/27/2017
4/28/2017
4/29/2017
4/30/2017
5/1/2017
5/2/2017
5/3/2017
5/4/2017
5/5/2017
5/6/2017
5/7/2017
5/8/2017
5/9/2017
5/10/2017
5/11/2017
5/12/2017
5/13/2017
5/14/2017
5/15/2017
5/16/2017
5/17/2017
5/18/2017
5/19/2017
5/20/2017
5/21/2017
5/22/2017
5/23/2017
5/24/2017
5/25/2017
5/26/2017
5/27/2017
5/28/2017
5/29/2017
5/30/2017
5/31/2017
6/1/2017
6/2/2017
6/3/2017
6/4/2017
6/5/2017
6/6/2017
6/7/2017
6/8/2017
6/9/2017
6/10/2017
6/11/2017
6/12/2017
6/13/2017
6/14/2017
6/15/2017
6/16/2017
6/17/2017
6/18/2017
6/19/2017
6/20/2017
6/21/2017
6/22/2017
6/23/2017
6/24/2017
6/25/2017
6/26/2017
6/27/2017
6/28/2017
6/29/2017
6/30/2017
Day of YearDaily PrcpMultiday Prcp
7/1/2017
7/2/2017
7/3/2017
7/4/2017
7/5/2017
7/6/2017
7/7/2017
7/8/2017
7/9/2017
7/10/2017
7/11/2017
7/12/2017
7/13/2017
7/14/2017
7/15/2017
7/16/2017
7/17/2017
7/18/2017
7/19/2017
7/20/2017
7/21/2017
7/22/2017
7/23/2017
7/24/2017
7/25/2017
7/26/2017
7/27/2017
7/28/2017
7/29/2017
7/30/2017
7/31/2017
8/1/2017
8/2/2017
8/3/2017
8/4/2017
8/5/2017
8/6/2017
8/7/2017
8/8/2017
8/9/2017
8/10/2017
8/11/2017
8/12/2017
8/13/2017
8/14/2017
8/15/2017
8/16/2017
8/17/2017
8/18/2017
8/19/2017
8/20/2017
8/21/2017
8/22/2017
8/23/2017
8/24/2017
8/25/2017
8/26/2017
8/27/2017
8/28/2017
8/29/2017
8/30/2017
8/31/2017
9/1/2017
9/2/2017
9/3/2017
9/4/2017
9/5/2017
9/6/2017
9/7/2017
9/8/2017
9/9/2017
9/10/2017
9/11/2017
9/12/2017 0.21
9/13/2017
9/14/2017
9/15/2017
9/16/2017
9/17/2017
9/18/2017
9/19/2017
9/20/2017
9/21/2017
9/22/2017
9/23/2017
9/24/2017
9/25/2017
9/26/2017
9/27/2017
9/28/2017
9/29/2017
9/30/2017



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/15/2016 8:00 AM 0.47 M M M M
10/25/2016 7:15 AM 0.03 M M M M
10/26/2016 7:15 AM 0.00 0.0 M M M drizzle on the coast, but nothing here
10/27/2016 7:45 AM 0.03 M M M M
10/28/2016 7:30 AM 0.69 M M M M
11/1/2016 7:30 AM 0.23 M M M M
12/1/2016 7:15 AM 0.02 M M M M
12/8/2016 7:30 AM 1.91 M M M M auto gauge on site recorded 1.89
12/9/2016 11:30 AM 0.33 M M M M
12/14/2016 7:30 AM 0.06 M M M M
12/15/2016 7:30 AM 0.07 M M M M
12/16/2016 7:30 AM 1.11 M M M M
12/23/2016 7:30 AM 0.49 M M M M
12/24/2016 11:12 AM 0.24 M M M M
1/10/2017 8:20 AM 0.86 M M M M
1/11/2017 7:30 AM 1.69 M M M M
1/12/2017 8:00 AM 0.28 M M M M
1/19/2017 9:00 AM 0.90 M M M M included a brief thunderstorm at about 8:45 AM
1/20/2017 6:30 AM 0.78 M M M M
1/24/2017 8:00 AM 0.07 M M M M
2/2/2017 8:00 AM 0.13 M M M M
2/3/2017 7:45 AM 0.38 M M M M
2/7/2017 8:30 AM 1.73 M M M M
2/8/2017 7:30 AM 0.67 M M M M drizzle at obs time...
2/9/2017 7:30 AM 0.34 M M M M
2/10/2017 7:30 AM 0.85 M M M M
2/16/2017 7:15 AM 0.37 M M M M
2/17/2017 7:15 AM 0.24 M M M M
2/21/2017 6:45 AM 1.20 M M M M
2/22/2017 7:30 AM 0.26 M M M M
2/23/2017 7:30 AM 0.02 M M M M
3/6/2017 7:30 AM 0.33 M M M M
3/7/2017 7:30 AM 0.03 M M M M
4/12/2017 8:45 AM 0.24 M M M M
4/18/2017 8:00 AM 0.19 M M M M
9/12/2017 7:30 AM 0.21 M M M M thunderstorms yesterday between 6 and 11 PM



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/16/2016 10/17/2016 8:00 AM 2 2.14 M M
10/29/2016 10/31/2016 7:15 AM 3 0.97 M M
11/2/2016 11/07/2016 8:00 AM 6 T M M
11/19/2016 11/21/2016 7:15 AM 3 0.47 M M
11/23/2016 11/28/2016 7:30 AM 6 1.04 M M
12/10/2016 12/11/2016 8:00 AM 2 1.08 M M
12/25/2016 1/02/2017 1:00 PM 9 0.12 M M
1/3/2017 1/06/2017 1:00 PM 4 1.58 M M
1/7/2017 1/09/2017 7:30 AM 3 1.88 M M
1/13/2017 1/18/2017 7:30 AM 6 0.05 M M most fell during the past 12 hrs
1/21/2017 1/23/2017 3:40 PM 3 1.68 M M
2/4/2017 2/06/2017 7:15 AM 3 0.42 M M light rain at obs time
2/18/2017 2/20/2017 9:40 AM 3 1.68 M M
2/25/2017 2/27/2017 7:30 AM 3 0.09 M M
3/4/2017 3/05/2017 10:30 AM 2 1.20 M M
3/18/2017 3/27/2017 8:00 AM 10 1.92 M M included several separate rain events
4/1/2017 4/10/2017 8:00 AM 10 1.53 M M
4/15/2017 4/17/2017 8:00 AM 3 0.18 M M
4/19/2017 4/20/2017 8:00 AM 2 0.16 M M



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