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 13 1.15 0.00 32 0.00 21 0.00 11 4 0 3 0.0 0 0
Nov 13 2.58 1.09 28 1.09 16 0.00 12 3 2 1 0.0 0 0
Dec 13 4.23 0.82 31 0.82 15 0.00 16 2 1 1 0.0 0 0
Jan 14 4.51 0.01 31 0.01 22 0.00 9 2 1 2 0.0 0 0
Feb 14 4.43 5.12 29 5.08 24 0.04 5 2 10 4 0.0 0 0
March 14 3.30 1.47 11 0.96 4 0.51 7 1 4 0 0.0 0 0
April 14 1.49 1.63 2 0.00 0 1.63 2 1 0 0 0.0 0 0
May 14 0.63 0.01 1 0.01 1 0.00 0 0 1 0 0.0 0 0
June 14 0.14 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 14 0.03 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 14 0.10 0.00 1 0.00 1 0.00 0 0 0 1 0.0 0 0
Sept 14 0.16 0.54 5 0.54 2 0.00 3 1 1 0 0.0 0 0
Water Year Totals: 22.75" 10.69" 171 days 8.51" 106 2.18" 65 days 16 20 days 12 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
10/1/2013 0.00
10/2/2013 0.00
10/3/2013 0.00
10/4/2013 0.00
10/5/2013 **
10/6/2013 **
10/7/2013 0.00
10/8/2013 0.00
10/9/2013 0.00
10/10/2013 0.00
10/11/2013 0.00
10/12/2013 **
10/13/2013 **
10/14/2013 0.00
10/15/2013 0.00
10/16/2013 0.00
10/17/2013 0.00
10/18/2013 0.00
10/19/2013 0.00
10/20/2013 **
10/21/2013 0.00 0.00
10/22/2013 T
10/23/2013 T
10/24/2013 0.00
10/25/2013 0.00
10/26/2013 **
10/27/2013 **
10/28/2013 0.00
10/29/2013 T
10/30/2013 0.00
10/31/2013 0.00
11/1/2013 0.00
11/2/2013 0.00
11/3/2013 **
11/4/2013 0.00
11/5/2013 0.00
11/6/2013 0.00
11/7/2013 0.00
11/8/2013 0.00
11/9/2013 **
11/10/2013 **
11/11/2013 **
11/12/2013 T
11/13/2013 0.00
11/14/2013 0.00
11/15/2013 0.00
11/16/2013 **
11/17/2013 **
11/18/2013 0.00 0.00
11/19/2013 0.00
11/20/2013 0.33
11/21/2013 0.76
11/22/2013 T
11/23/2013
11/24/2013
11/25/2013
11/26/2013 0.00
11/27/2013 0.00
11/28/2013 **
11/29/2013 **
11/30/2013 **
12/1/2013 **
12/2/2013 0.00
12/3/2013 T
12/4/2013 0.00
12/5/2013 0.00
12/6/2013 0.00
12/7/2013 0.82
12/8/2013 **
12/9/2013 0.00
12/10/2013 0.00
12/11/2013 0.00
12/12/2013 0.00
12/13/2013 0.00
12/14/2013 0.00
12/15/2013 0.00
12/16/2013 0.00
12/17/2013 0.00
12/18/2013 0.00
12/19/2013 0.00
12/20/2013 **
12/21/2013 **
12/22/2013 **
12/23/2013 **
12/24/2013 **
12/25/2013 **
12/26/2013 **
12/27/2013 **
12/28/2013 **
12/29/2013 **
12/30/2013 **
12/31/2013 **
Day of YearDaily PrcpMultiday Prcp
1/1/2014 **
1/2/2014 **
1/3/2014 **
1/4/2014 **
1/5/2014 **
1/6/2014 **
1/7/2014 0.00
1/8/2014 T
1/9/2014 T
1/10/2014 0.00
1/11/2014 0.00
1/12/2014 **
1/13/2014 T
1/14/2014 0.00
1/15/2014 0.00
1/16/2014 0.00
1/17/2014 0.00
1/18/2014 0.00
1/19/2014 0.00
1/20/2014 0.00
1/21/2014 0.00
1/22/2014 0.00
1/23/2014 0.00
1/24/2014 0.00
1/25/2014 0.00
1/26/2014 0.00
1/27/2014 0.00
1/28/2014 0.00
1/29/2014 0.00
1/30/2014 0.01
1/31/2014 0.00
2/1/2014 **
2/2/2014 0.19 M
2/3/2014 0.94
2/4/2014 0.00
2/5/2014 0.00
2/6/2014 0.73
2/7/2014 0.10
2/8/2014 0.73
2/9/2014 0.84
2/10/2014 0.36
2/11/2014 T
2/12/2014 T
2/13/2014 0.00
2/14/2014 T
2/15/2014 **
2/16/2014 **
2/17/2014 0.04
2/18/2014 0.00
2/19/2014 T
2/20/2014 0.00
2/21/2014 0.00
2/22/2014 0.00
2/23/2014 0.00
2/24/2014 0.00
2/25/2014 0.00
2/26/2014 0.02
2/27/2014 0.43
2/28/2014 0.74
3/1/2014 **
3/2/2014 **
3/3/2014 0.51
3/4/2014 0.07
3/5/2014
3/6/2014 0.20
3/7/2014
3/8/2014
3/9/2014
3/10/2014
3/11/2014
3/12/2014
3/13/2014
3/14/2014
3/15/2014
3/16/2014
3/17/2014
3/18/2014
3/19/2014
3/20/2014
3/21/2014
3/22/2014
3/23/2014
3/24/2014
3/25/2014
3/26/2014 0.12
3/27/2014 0.57
3/28/2014 **
3/29/2014 **
3/30/2014 **
3/31/2014 **
Day of YearDaily PrcpMultiday Prcp
4/1/2014 **
4/2/2014 1.63
4/3/2014
4/4/2014
4/5/2014
4/6/2014
4/7/2014
4/8/2014
4/9/2014
4/10/2014
4/11/2014
4/12/2014
4/13/2014
4/14/2014
4/15/2014
4/16/2014
4/17/2014
4/18/2014
4/19/2014
4/20/2014
4/21/2014
4/22/2014
4/23/2014
4/24/2014
4/25/2014
4/26/2014
4/27/2014
4/28/2014
4/29/2014
4/30/2014
5/1/2014
5/2/2014
5/3/2014
5/4/2014
5/5/2014
5/6/2014
5/7/2014
5/8/2014
5/9/2014 0.01
5/10/2014
5/11/2014
5/12/2014
5/13/2014
5/14/2014
5/15/2014
5/16/2014
5/17/2014
5/18/2014
5/19/2014
5/20/2014
5/21/2014
5/22/2014
5/23/2014
5/24/2014
5/25/2014
5/26/2014
5/27/2014
5/28/2014
5/29/2014
5/30/2014
5/31/2014
6/1/2014
6/2/2014
6/3/2014
6/4/2014
6/5/2014
6/6/2014
6/7/2014
6/8/2014
6/9/2014
6/10/2014
6/11/2014
6/12/2014
6/13/2014
6/14/2014
6/15/2014
6/16/2014
6/17/2014
6/18/2014
6/19/2014
6/20/2014
6/21/2014
6/22/2014
6/23/2014
6/24/2014
6/25/2014
6/26/2014
6/27/2014
6/28/2014
6/29/2014
6/30/2014
Day of YearDaily PrcpMultiday Prcp
7/1/2014
7/2/2014
7/3/2014
7/4/2014
7/5/2014
7/6/2014
7/7/2014
7/8/2014
7/9/2014
7/10/2014
7/11/2014
7/12/2014
7/13/2014
7/14/2014
7/15/2014
7/16/2014
7/17/2014
7/18/2014
7/19/2014
7/20/2014
7/21/2014
7/22/2014
7/23/2014
7/24/2014
7/25/2014
7/26/2014
7/27/2014
7/28/2014
7/29/2014
7/30/2014
7/31/2014
8/1/2014
8/2/2014
8/3/2014
8/4/2014
8/5/2014
8/6/2014
8/7/2014
8/8/2014
8/9/2014
8/10/2014
8/11/2014
8/12/2014
8/13/2014
8/14/2014
8/15/2014
8/16/2014
8/17/2014
8/18/2014
8/19/2014
8/20/2014
8/21/2014
8/22/2014 T
8/23/2014
8/24/2014
8/25/2014
8/26/2014
8/27/2014
8/28/2014
8/29/2014
8/30/2014
8/31/2014
9/1/2014
9/2/2014
9/3/2014
9/4/2014
9/5/2014
9/6/2014
9/7/2014
9/8/2014
9/9/2014
9/10/2014
9/11/2014
9/12/2014
9/13/2014 **
9/14/2014 **
9/15/2014 0.00
9/16/2014
9/17/2014
9/18/2014
9/19/2014
9/20/2014
9/21/2014
9/22/2014
9/23/2014
9/24/2014
9/25/2014 0.54
9/26/2014 0.00
9/27/2014
9/28/2014
9/29/2014
9/30/2014



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2013 7:30 AM 0.00 0.0 M M M
10/2/2013 7:15 AM 0.00 0.0 M M M
10/3/2013 7:15 AM 0.00 0.0 M M M
10/4/2013 7:15 AM 0.00 0.0 M M M
10/8/2013 7:15 AM 0.00 0.0 M M M
10/9/2013 7:15 AM 0.00 0.0 M M M
10/10/2013 7:15 AM 0.00 0.0 M M M
10/11/2013 7:15 AM 0.00 0.0 M M M overcast
10/15/2013 7:15 AM 0.00 0.0 M M M
10/16/2013 8:00 AM 0.00 0.0 M M M
10/17/2013 8:00 AM 0.00 0.0 M M M
10/18/2013 7:15 AM 0.00 0.0 M M M
10/19/2013 8:15 AM 0.00 0.0 M M M
10/21/2013 7:30 AM 0.00 0.0 M M M overcast
10/22/2013 7:00 AM T M M M M fog drizzle at obs. time; wet streets
10/23/2013 7:15 AM T M M M M few drops acc'd; foggy with v.light mist at obs. time
10/24/2013 7:15 AM 0.00 0.0 M M M
10/25/2013 7:15 AM 0.00 0.0 M M M
10/29/2013 7:30 AM T M M M M drops covering funnel surface, with small accumulation; drove through isolated shower at 7:15 AM
10/30/2013 8:00 AM 0.00 0.0 M M M
10/31/2013 8:00 AM 0.00 0.0 M M M
11/1/2013 8:00 AM 0.00 0.0 M M M
11/2/2013 9:00 AM 0.00 0.0 M M M
11/5/2013 8:00 AM 0.00 0.0 M M M
11/6/2013 8:00 AM 0.00 0.0 M M M
11/7/2013 8:00 AM 0.00 0.0 M M M
11/8/2013 8:00 AM 0.00 0.0 M M M
11/13/2013 8:00 AM 0.00 0.0 M M M
11/14/2013 7:30 AM 0.00 0.0 M M M fog/drizzle nearby to the west, but just overcast at site
11/15/2013 8:00 AM 0.00 0.0 M M M
11/18/2013 7:30 AM 0.00 0.0 M M M
11/19/2013 7:15 AM 0.00 0.0 M M M
11/20/2013 7:15 AM 0.33 M M M M 0.07 at 4PM yesterday; most accumulated overnight
11/21/2013 7:30 AM 0.76 M M M M
11/22/2013 7:15 AM T M M M M 11/21 morning drizzle; leftovers from the earlier storms
11/26/2013 8:00 AM 0.00 0.0 M M M
11/27/2013 8:00 AM 0.00 0.0 M M M
12/3/2013 7:15 AM T M M M M this is only an estimate; the gauge was not in place for this event :-(
12/4/2013 8:00 AM 0.00 0.0 M M M
12/5/2013 8:00 AM 0.00 0.0 M M M
12/6/2013 8:00 AM 0.00 0.0 M M M
12/7/2013 9:30 AM 0.82 M M M M first traces of rain about 4 PM, as forecast; automated gauge nearby recorded 0.72 for the same period...
12/10/2013 7:15 AM 0.00 0.0 M M M frosty!
12/11/2013 8:00 AM 0.00 0.0 M M M
12/12/2013 8:00 AM 0.00 0.0 M M M
12/13/2013 8:00 AM 0.00 0.0 M M M
12/14/2013 8:00 AM 0.00 0.0 M M M
12/15/2013 8:00 AM 0.00 0.0 M M M
12/16/2013 8:00 AM 0.00 0.0 M M M
12/17/2013 8:00 AM 0.00 0.0 M M M
12/18/2013 8:00 AM 0.00 0.0 M M M
12/19/2013 8:00 AM 0.00 0.0 M M M
1/8/2014 7:15 AM T M M M M wet streets
1/9/2014 7:15 AM T M M M M wet streets and funnel, but no accumulation; light drizzle at obs. time
1/10/2014 7:15 AM 0.00 0.0 M M M
1/11/2014 12:00 PM 0.00 0.0 M M M no accumulation, but v.light mist blowing around ahead of front
1/14/2014 8:00 AM 0.00 0.0 M M M
1/15/2014 8:00 AM 0.00 0.0 M M M
1/16/2014 8:00 AM 0.00 0.0 M M M
1/17/2014 8:00 AM 0.00 0.0 M M M
1/18/2014 8:00 AM 0.00 0.0 M M M
1/19/2014 8:00 AM 0.00 0.0 M M M
1/20/2014 8:00 AM 0.00 0.0 M M M
1/21/2014 8:00 AM 0.00 0.0 M M M
1/22/2014 8:00 AM 0.00 0.0 M M M
1/23/2014 8:00 AM 0.00 0.0 M M M
1/24/2014 8:00 AM 0.00 0.0 M M M
1/25/2014 8:00 AM 0.00 0.0 M M M
1/26/2014 8:00 AM 0.00 0.0 M M M
1/27/2014 8:00 AM 0.00 0.0 M M M
1/28/2014 7:15 AM 0.00 0.0 M M M
1/29/2014 7:00 AM 0.00 0.0 M M M drizzle on the coast, but none here...
1/30/2014 7:15 AM 0.01 M M M M
1/31/2014 7:15 AM 0.00 0.0 M M M
2/2/2014 9:00 AM 0.19 M M M M light rain continuing at obs. time
2/3/2014 7:15 AM 0.94 M M M M since 9 AM yesterday; storm total = 1.13
2/4/2014 7:15 AM 0.00 0.0 M M M
2/5/2014 7:15 AM 0.00 0.0 M M M
2/6/2014 7:15 AM 0.73 M M M M light rain cont. at obs. time
2/7/2014 7:45 AM 0.10 M M M M
2/8/2014 8:45 AM 0.73 M M M M light rain cont. at obs. time
2/9/2014 11:00 AM 0.84 M M M M
2/10/2014 7:15 AM 0.36 M M M M
2/11/2014 7:15 AM T M M M M no accumulation, but drops covering funnel, and v.light mist observed 2/10 AM
2/12/2014 7:00 AM T M M M M v.light mist observed mid morning 2/11
2/13/2014 7:30 AM 0.00 0.0 M M M
2/14/2014 7:15 AM T M M M M no accumulation, but everything is wet...
2/18/2014 8:00 AM 0.00 0.0 M M M
2/19/2014 8:00 AM T 0.0 M M M
2/20/2014 8:00 AM 0.00 0.0 M M M
2/21/2014 8:00 AM 0.00 0.0 M M M
2/22/2014 8:00 AM 0.00 0.0 M M M
2/23/2014 8:00 AM 0.00 0.0 M M M
2/24/2014 8:00 AM 0.00 0.0 M M M
2/25/2014 8:00 AM 0.00 0.0 M M M
2/26/2014 7:15 AM 0.02 M M M M light rain cont. at obs. time
2/27/2014 7:15 AM 0.43 M M M M light misty rain cont. at obs. time
2/28/2014 7:15 AM 0.74 M M M M showers moving through...
3/4/2014 7:15 AM 0.07 M M M M
3/6/2014 7:15 AM 0.20 M M M M misty sprinkles observed about 4:30 PM (3/5), but most rain fell after 10 PM
3/26/2014 7:15 AM 0.12 M M M M
3/27/2014 7:15 AM 0.57 M M M M
5/9/2014 8:00 AM 0.01 M M M M data from automated gauge on site
8/22/2014 7:00 AM T M M M M v light mist at obs time
9/25/2014 7:30 AM 0.54 M M M M 0.53 rec by automated gauge
9/26/2014 4:30 PM 0.00 0.0 M M M automated gauge indicated 0.01 early this AM, but no evidence of that in the CoCoRaHS gauge



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/5/2013 10/07/2013 7:00 AM 3 0.00 M M
10/12/2013 10/14/2013 7:15 AM 3 0.00 M M
10/20/2013 10/21/2013 7:15 AM 2 0.00 M M
10/26/2013 10/28/2013 7:15 AM 3 0.00 M M
11/3/2013 11/04/2013 7:15 AM 2 0.00 M M
11/9/2013 11/12/2013 7:15 AM 4 T M M passing showers this AM (11/12), local streets wet
11/16/2013 11/18/2013 7:30 AM 3 0.00 M M
11/28/2013 12/02/2013 7:15 AM 5 0.00 M M
12/8/2013 12/09/2013 7:15 AM 2 0.00 M M
12/20/2013 1/07/2014 7:15 AM 19 0.00 M M
1/12/2014 1/13/2014 7:30 AM 2 T M M light mist/drizzle as front passed on 1/11 PM
2/1/2014 2/02/2014 9:00 AM 2 M M M 0.19 reported in daily for 2/2 as of 9 AM; this MD report covers back to 2/1
2/15/2014 2/17/2014 12:00 PM 3 0.04 M M automated gauge reported 0.05 overnight 2/15-16
3/1/2014 3/03/2014 7:15 AM 3 0.51 M M
3/28/2014 4/02/2014 9:15 AM 6 1.63 M M
9/13/2014 9/15/2014 7:15 AM 3 0.00 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