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 14 1.15 0.41 31 0.31 29 0.10 2 1 2 1 0.0 0 0
Nov 14 2.58 1.34 30 0.78 19 0.56 11 2 4 0 0.0 0 0
Dec 14 4.23 13.20 29 11.52 11 1.68 18 4 10 1 0.0 0 0
Jan 15 4.51 0.07 8 0.00 6 0.07 2 1 0 0 0.0 0 0
Feb 15 4.43 2.18 4 0.00 0 2.18 4 1 0 0 0.0 0 0
March 15 3.30 0.14 6 0.12 4 0.02 2 1 2 1 0.0 0 0
April 15 1.49 1.43 30 0.73 27 0.70 3 1 2 1 0.0 0 0
May 15 0.63 0.01 13 0.01 9 0.00 4 1 1 3 0.0 0 0
June 15 0.14 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 15 0.03 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 15 0.10 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 0
Sept 15 0.16 0.03 30 0.03 30 0.00 0 0 1 0 0.0 0 0
Water Year Totals: 22.75" 18.81" 182 days 13.50" 136 5.31" 46 days 12 22 days 7 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
10/1/2014 0.00
10/2/2014 0.00
10/3/2014 0.00
10/4/2014 0.00
10/5/2014 0.00
10/6/2014 0.00
10/7/2014 0.00
10/8/2014 0.00
10/9/2014 0.00
10/10/2014 0.00
10/11/2014 0.00
10/12/2014 0.00
10/13/2014 0.00
10/14/2014 0.00
10/15/2014 0.03
10/16/2014 0.00
10/17/2014 0.00
10/18/2014 0.00
10/19/2014 0.00
10/20/2014 0.00
10/21/2014 T
10/22/2014 0.00
10/23/2014 0.00
10/24/2014 0.00
10/25/2014 0.28
10/26/2014 **
10/27/2014 0.10
10/28/2014 0.00
10/29/2014 0.00
10/30/2014 0.00
10/31/2014 0.00
11/1/2014 **
11/2/2014 **
11/3/2014 0.26
11/4/2014 0.00
11/5/2014 0.00
11/6/2014 0.00
11/7/2014 0.00
11/8/2014 0.00
11/9/2014 0.00
11/10/2014 0.00
11/11/2014 0.00
11/12/2014 0.00
11/13/2014 0.43
11/14/2014 0.00
11/15/2014 0.00
11/16/2014 0.00
11/17/2014 0.00
11/18/2014 0.00
11/19/2014 0.01
11/20/2014 0.11
11/21/2014 0.23
11/22/2014 **
11/23/2014 **
11/24/2014 0.30
11/25/2014 0.00
11/26/2014 **
11/27/2014 **
11/28/2014 **
11/29/2014 **
11/30/2014 **
12/1/2014 0.66
12/2/2014 1.19
12/3/2014 1.79
12/4/2014 0.87
12/5/2014 T
12/6/2014 **
12/7/2014 **
12/8/2014 0.22
12/9/2014
12/10/2014
12/11/2014 0.23
12/12/2014 4.02
12/13/2014 **
12/14/2014 0.35
12/15/2014 1.35
12/16/2014 0.41
12/17/2014 1.37
12/18/2014 0.23
12/19/2014 0.06
12/20/2014 **
12/21/2014 **
12/22/2014 **
12/23/2014 0.45
12/24/2014 **
12/25/2014 **
12/26/2014 **
12/27/2014 **
12/28/2014 **
12/29/2014 **
12/30/2014 **
12/31/2014 **
Day of YearDaily PrcpMultiday Prcp
1/1/2015 **
1/2/2015 0.07
1/3/2015 0.00
1/4/2015 0.00
1/5/2015 0.00
1/6/2015 0.00
1/7/2015 0.00
1/8/2015 0.00
1/9/2015
1/10/2015
1/11/2015
1/12/2015
1/13/2015
1/14/2015
1/15/2015
1/16/2015
1/17/2015
1/18/2015
1/19/2015
1/20/2015
1/21/2015
1/22/2015
1/23/2015
1/24/2015
1/25/2015
1/26/2015
1/27/2015
1/28/2015
1/29/2015
1/30/2015
1/31/2015
2/1/2015
2/2/2015
2/3/2015
2/4/2015
2/5/2015
2/6/2015
2/7/2015 **
2/8/2015 **
2/9/2015 2.18
2/10/2015
2/11/2015
2/12/2015
2/13/2015
2/14/2015
2/15/2015
2/16/2015
2/17/2015
2/18/2015
2/19/2015
2/20/2015
2/21/2015
2/22/2015
2/23/2015
2/24/2015
2/25/2015
2/26/2015
2/27/2015
2/28/2015 **
3/1/2015 **
3/2/2015 0.02
3/3/2015 T
3/4/2015
3/5/2015 0.00
3/6/2015
3/7/2015
3/8/2015
3/9/2015
3/10/2015
3/11/2015 0.02
3/12/2015
3/13/2015
3/14/2015
3/15/2015
3/16/2015
3/17/2015
3/18/2015
3/19/2015
3/20/2015
3/21/2015
3/22/2015
3/23/2015 0.10
3/24/2015
3/25/2015
3/26/2015
3/27/2015
3/28/2015
3/29/2015
3/30/2015
3/31/2015
Day of YearDaily PrcpMultiday Prcp
4/1/2015 0.00
4/2/2015 0.00
4/3/2015 0.00
4/4/2015 0.00
4/5/2015 0.00
4/6/2015 T
4/7/2015 0.71
4/8/2015 0.02
4/9/2015 0.00
4/10/2015 0.00
4/11/2015 0.00
4/12/2015 0.00
4/13/2015 0.00
4/14/2015 0.00
4/15/2015 0.00
4/16/2015 0.00
4/17/2015 0.00
4/18/2015 0.00
4/19/2015 0.00
4/20/2015 0.00
4/21/2015 0.00
4/22/2015 0.00
4/23/2015 0.00
4/24/2015 0.00
4/25/2015 **
4/26/2015 **
4/27/2015 0.70
4/28/2015 0.00
4/29/2015 0.00
4/30/2015 0.00
5/1/2015 0.00
5/2/2015 0.00
5/3/2015 0.00
5/4/2015 T
5/5/2015 0.00
5/6/2015 0.00
5/7/2015
5/8/2015
5/9/2015
5/10/2015
5/11/2015
5/12/2015
5/13/2015
5/14/2015
5/15/2015 T
5/16/2015
5/17/2015
5/18/2015
5/19/2015 T
5/20/2015
5/21/2015 0.01
5/22/2015
5/23/2015 **
5/24/2015 **
5/25/2015 **
5/26/2015 T
5/27/2015
5/28/2015
5/29/2015
5/30/2015
5/31/2015
6/1/2015
6/2/2015
6/3/2015
6/4/2015
6/5/2015
6/6/2015
6/7/2015
6/8/2015
6/9/2015
6/10/2015
6/11/2015
6/12/2015
6/13/2015
6/14/2015
6/15/2015
6/16/2015
6/17/2015
6/18/2015
6/19/2015
6/20/2015
6/21/2015
6/22/2015
6/23/2015
6/24/2015
6/25/2015
6/26/2015
6/27/2015
6/28/2015
6/29/2015
6/30/2015
Day of YearDaily PrcpMultiday Prcp
7/1/2015
7/2/2015
7/3/2015
7/4/2015
7/5/2015
7/6/2015
7/7/2015
7/8/2015
7/9/2015
7/10/2015
7/11/2015
7/12/2015
7/13/2015
7/14/2015
7/15/2015
7/16/2015
7/17/2015
7/18/2015
7/19/2015
7/20/2015
7/21/2015
7/22/2015
7/23/2015
7/24/2015
7/25/2015
7/26/2015
7/27/2015
7/28/2015
7/29/2015
7/30/2015
7/31/2015
8/1/2015
8/2/2015
8/3/2015
8/4/2015
8/5/2015
8/6/2015
8/7/2015
8/8/2015
8/9/2015
8/10/2015
8/11/2015
8/12/2015
8/13/2015
8/14/2015
8/15/2015
8/16/2015
8/17/2015
8/18/2015
8/19/2015
8/20/2015
8/21/2015
8/22/2015
8/23/2015
8/24/2015
8/25/2015
8/26/2015
8/27/2015
8/28/2015
8/29/2015
8/30/2015
8/31/2015 0.00
9/1/2015 0.00
9/2/2015 0.00
9/3/2015 0.00
9/4/2015 0.00
9/5/2015 0.00
9/6/2015 0.00
9/7/2015 0.00
9/8/2015 0.00
9/9/2015 0.00
9/10/2015 0.00
9/11/2015 0.00
9/12/2015 0.00
9/13/2015 0.00
9/14/2015 0.00
9/15/2015 0.00
9/16/2015 0.00
9/17/2015 0.03
9/18/2015 0.00
9/19/2015 0.00
9/20/2015 0.00
9/21/2015 0.00
9/22/2015 0.00
9/23/2015 0.00
9/24/2015 0.00
9/25/2015 0.00
9/26/2015 0.00
9/27/2015 0.00
9/28/2015 0.00
9/29/2015 0.00
9/30/2015 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2014 8:00 AM 0.00 0.0 M M M
10/2/2014 8:00 AM 0.00 0.0 M M M
10/3/2014 8:00 AM 0.00 0.0 M M M
10/4/2014 8:00 AM 0.00 0.0 M M M
10/5/2014 8:00 AM 0.00 0.0 M M M
10/6/2014 8:00 AM 0.00 0.0 M M M
10/7/2014 8:00 AM 0.00 0.0 M M M
10/8/2014 8:00 AM 0.00 0.0 M M M
10/9/2014 8:00 AM 0.00 0.0 M M M
10/10/2014 8:00 AM 0.00 0.0 M M M
10/11/2014 8:00 AM 0.00 0.0 M M M
10/12/2014 8:00 AM 0.00 0.0 M M M
10/13/2014 8:00 AM 0.00 0.0 M M M
10/14/2014 8:00 AM 0.00 0.0 M M M
10/15/2014 7:30 AM 0.03 M M M M almost 0.04, but not quite :-)
10/16/2014 7:00 AM 0.00 0.0 M M M
10/17/2014 8:00 AM 0.00 0.0 M M M
10/18/2014 8:00 AM 0.00 0.0 M M M
10/19/2014 8:00 AM 0.00 0.0 M M M
10/20/2014 8:00 AM 0.00 0.0 M M M
10/21/2014 8:00 AM T M M M M misty drizzle 10/20 AM
10/22/2014 8:00 AM 0.00 0.0 M M M
10/23/2014 8:00 AM 0.00 0.0 M M M
10/24/2014 8:00 AM 0.00 0.0 M M M
10/25/2014 9:45 AM 0.28 M M M M auto=0.28 as well
10/28/2014 8:00 AM 0.00 0.0 M M M
10/29/2014 7:00 AM 0.00 0.0 M M M
10/30/2014 8:00 AM 0.00 0.0 M M M
10/31/2014 8:00 AM 0.00 0.0 M M M
11/4/2014 8:00 AM 0.00 0.0 M M M
11/5/2014 8:00 AM 0.00 0.0 M M M
11/6/2014 8:00 AM 0.00 0.0 M M M
11/7/2014 8:00 AM 0.00 0.0 M M M
11/8/2014 8:00 AM 0.00 0.0 M M M
11/9/2014 8:00 AM 0.00 0.0 M M M
11/10/2014 8:00 AM 0.00 0.0 M M M foggy...
11/11/2014 8:00 AM 0.00 0.0 M M M
11/12/2014 8:00 AM 0.00 0.0 M M M
11/13/2014 8:00 AM 0.43 M M M M ...recorded by automated gauge; manual gauge was not in place
11/14/2014 8:00 AM 0.00 0.0 M M M
11/15/2014 8:00 AM 0.00 0.0 M M M
11/16/2014 8:00 AM 0.00 0.0 M M M
11/17/2014 8:00 AM 0.00 0.0 M M M
11/18/2014 8:00 AM 0.00 0.0 M M M
11/19/2014 7:15 AM 0.01 M M M M
11/20/2014 7:15 AM 0.11 M M M M
11/21/2014 7:15 AM 0.23 M M M M
11/25/2014 8:00 AM 0.00 0.0 M M M
12/2/2014 7:00 AM 1.19 M M M M light rain cont at obs time (1.14 by automated gauge)
12/3/2014 9:45 AM 1.79 M M M M
12/4/2014 7:00 AM 0.87 M M M M
12/5/2014 7:00 AM T M M M M v light mist at obs time
12/11/2014 7:15 AM 0.23 M M M M rain cont at obs time; heavy rain about 30 mins after...
12/12/2014 7:15 AM 4.02 M M M M
12/15/2014 7:45 AM 1.35 M M M M
12/16/2014 7:30 AM 0.41 M M M M
12/17/2014 7:15 AM 1.37 M M M M light rain cont at obs time
12/18/2014 8:00 AM 0.23 M M M M
12/19/2014 10:30 AM 0.06 M M M M
1/3/2015 8:00 AM 0.00 0.0 M M M
1/4/2015 8:00 AM 0.00 0.0 M M M
1/5/2015 8:00 AM 0.00 0.0 M M M
1/6/2015 8:00 AM 0.00 0.0 M M M
1/7/2015 8:00 AM 0.00 0.0 M M M
1/8/2015 8:00 AM 0.00 0.0 M M M
3/3/2015 7:15 AM T M M M M few drops observed (4PM) from weakening storms nearby
3/5/2015 7:15 AM 0.00 0.0 M M M
3/11/2015 10:00 AM 0.02 M M M M
3/23/2015 7:15 AM 0.10 M M M M
4/1/2015 8:00 AM 0.00 0.0 M M M
4/2/2015 8:00 AM 0.00 0.0 M M M
4/3/2015 8:00 AM 0.00 0.0 M M M
4/4/2015 8:00 AM 0.00 0.0 M M M
4/5/2015 8:00 AM 0.00 0.0 M M M
4/6/2015 7:15 AM T M M M M
4/7/2015 7:30 AM 0.71 M M M M (auto=0.74)
4/8/2015 7:30 AM 0.02 M M M M tail end of frontal passage
4/9/2015 8:00 AM 0.00 0.0 M M M
4/10/2015 8:00 AM 0.00 0.0 M M M
4/11/2015 8:00 AM 0.00 0.0 M M M
4/12/2015 8:00 AM 0.00 0.0 M M M
4/13/2015 8:00 AM 0.00 0.0 M M M
4/14/2015 8:00 AM 0.00 0.0 M M M
4/15/2015 8:00 AM 0.00 0.0 M M M
4/16/2015 8:00 AM 0.00 0.0 M M M
4/17/2015 8:00 AM 0.00 0.0 M M M
4/18/2015 8:00 AM 0.00 0.0 M M M
4/19/2015 8:00 AM 0.00 0.0 M M M
4/20/2015 8:00 AM 0.00 0.0 M M M
4/21/2015 8:00 AM 0.00 0.0 M M M
4/22/2015 8:00 AM 0.00 0.0 M M M
4/23/2015 8:00 AM 0.00 0.0 M M M
4/24/2015 8:00 AM 0.00 0.0 M M M
4/28/2015 8:00 AM 0.00 0.0 M M M
4/29/2015 8:00 AM 0.00 0.0 M M M
4/30/2015 8:00 AM 0.00 0.0 M M M
5/1/2015 8:00 AM 0.00 0.0 M M M
5/2/2015 8:00 AM 0.00 0.0 M M M
5/3/2015 8:00 AM 0.00 0.0 M M M
5/4/2015 8:00 AM T M M M M overcast drizzle
5/5/2015 8:00 AM 0.00 0.0 M M M
5/6/2015 8:00 AM 0.00 0.0 M M M
5/15/2015 8:00 AM T M M M M occasional drops and sprinkles
5/19/2015 8:00 AM T M M M M overcast/fog/drizzle
5/21/2015 8:00 AM 0.01 M M M M overcast/fog/drizzle cont at obs time
8/31/2015 7:30 AM 0.00 0.0 M M M dry while the coast got 0.04-5 over the weekend
9/1/2015 8:00 AM 0.00 0.0 M M M
9/2/2015 8:00 AM 0.00 0.0 M M M
9/3/2015 8:00 AM 0.00 0.0 M M M
9/4/2015 8:00 AM 0.00 0.0 M M M
9/5/2015 8:00 AM 0.00 0.0 M M M
9/6/2015 8:00 AM 0.00 0.0 M M M
9/7/2015 8:00 AM 0.00 0.0 M M M
9/8/2015 8:00 AM 0.00 0.0 M M M
9/9/2015 8:00 AM 0.00 0.0 M M M
9/10/2015 8:00 AM 0.00 0.0 M M M
9/11/2015 8:00 AM 0.00 0.0 M M M
9/12/2015 8:00 AM 0.00 0.0 M M M
9/13/2015 8:00 AM 0.00 0.0 M M M
9/14/2015 8:00 AM 0.00 0.0 M M M
9/15/2015 8:00 AM 0.00 0.0 M M M
9/16/2015 8:00 AM 0.00 0.0 M M M
9/17/2015 7:30 AM 0.03 M M M M
9/18/2015 8:00 AM 0.00 0.0 M M M
9/19/2015 8:00 AM 0.00 0.0 M M M
9/20/2015 8:00 AM 0.00 0.0 M M M
9/21/2015 8:00 AM 0.00 0.0 M M M
9/22/2015 8:00 AM 0.00 0.0 M M M
9/23/2015 8:00 AM 0.00 0.0 M M M
9/24/2015 8:00 AM 0.00 0.0 M M M
9/25/2015 8:00 AM 0.00 0.0 M M M
9/26/2015 8:00 AM 0.00 0.0 M M M
9/27/2015 8:00 AM 0.00 0.0 M M M
9/28/2015 8:00 AM 0.00 0.0 M M M
9/29/2015 8:00 AM 0.00 0.0 M M M
9/30/2015 8:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/26/2014 10/27/2014 8:00 AM 2 0.10 M M probably from tail end of 10/25 event
11/1/2014 11/03/2014 7:15 AM 3 0.26 M M automated gauge recorded 0.27 during same period; poss EVAP loss from cylinder
11/22/2014 11/24/2014 8:00 AM 3 0.30 M M
11/26/2014 12/01/2014 8:00 AM 6 0.66 M M
12/6/2014 12/08/2014 8:00 AM 3 0.22 M M
12/13/2014 12/14/2014 10:15 AM 2 0.35 M M last bit of last week's storm system
12/20/2014 12/23/2014 2:30 PM 4 0.45 M M
12/24/2014 1/02/2015 2:30 PM 10 0.07 M M probably was more before a week+ of evaporation
2/7/2015 2/09/2015 7:15 AM 3 2.18 M M total since 4 PM Friday (2/6/2015); storm total = 2.68, as reported by automated rain gauge; manual gauge reading on Friday afternoon compromised by someone adding water to the cylinder...why?!...who knows?!
2/28/2015 3/02/2015 7:15 AM 3 0.02 M M same as local automated rain gauge
4/25/2015 4/27/2015 7:15 AM 3 0.70 M M [auto=0.69]
5/23/2015 5/26/2015 7:15 AM 4 T M M overcast/fog/drizzle cont at obs time



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