Station Overview Station Location
Station Number CA-SM-9 Latitude 37.381892
Station Name Portola Valley 1.3 ENE Longitude -122.197612
County San Mateo Elevation (ft) 531



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 1.19 0.00 15 0.00 5 0.00 10 1 0 3 0.0 0 0
Nov 13 2.99 0.82 27 0.82 5 0.00 22 3 3 0 0.0 0 0
Dec 13 4.80 0.65 8 0.65 8 0.00 0 0 1 1 0.0 0 0
Jan 14 5.34 0.02 17 0.02 8 0.00 9 1 1 2 0.0 0 0
Feb 14 5.03 4.76 26 4.66 23 0.10 3 1 12 2 0.0 0 0
March 14 4.20 1.92 20 1.92 20 0.00 0 0 11 0 0.0 0 0
April 14 1.71 1.93 53 1.93 10 0.00 43 1 7 1 0.0 0 0
May 14 0.63 0.06 34 0.06 3 0.00 31 0 2 0 0.0 0 0
June 14 0.16 0.00 30 0.00 0 0.00 30 0 0 0 0.0 0 0
July 14 0.03 0.00 32 0.00 1 0.00 31 0 0 1 0.0 0 0
Aug 14 0.04 0.00 31 0.00 0 0.00 31 0 0 0 0.0 0 0
Sept 14 0.21 0.61 24 0.61 7 0.00 17 1 3 2 0.0 0 0
Water Year Totals: 26.33" 10.77" 317 days 10.67" 90 0.10" 227 days 8 40 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
10/3/2013
10/4/2013
10/5/2013
10/6/2013
10/7/2013
10/8/2013
10/9/2013
10/10/2013
10/11/2013 **
10/12/2013 **
10/13/2013 **
10/14/2013 **
10/15/2013 **
10/16/2013 **
10/17/2013 **
10/18/2013 **
10/19/2013 0.00
10/20/2013
10/21/2013
10/22/2013 T
10/23/2013 T
10/24/2013 0.00
10/25/2013
10/26/2013
10/27/2013
10/28/2013
10/29/2013
10/30/2013 T
10/31/2013 **
11/1/2013 **
11/2/2013 **
11/3/2013 **
11/4/2013 **
11/5/2013 **
11/6/2013 **
11/7/2013 **
11/8/2013 **
11/9/2013 **
11/10/2013 **
11/11/2013 0.00
11/12/2013
11/13/2013
11/14/2013
11/15/2013
11/16/2013
11/17/2013
11/18/2013
11/19/2013 0.00
11/20/2013 0.38
11/21/2013 0.41
11/22/2013 0.03
11/23/2013 0.00
11/24/2013
11/25/2013
11/26/2013 **
11/27/2013 **
11/28/2013 **
11/29/2013 0.00
11/30/2013
12/1/2013
12/2/2013
12/3/2013
12/4/2013 0.00
12/5/2013 0.00
12/6/2013 0.00
12/7/2013 0.65
12/8/2013 T
12/9/2013 0.00
12/10/2013
12/11/2013
12/12/2013
12/13/2013
12/14/2013
12/15/2013
12/16/2013
12/17/2013
12/18/2013
12/19/2013
12/20/2013 0.00
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 0.00
12/30/2013
12/31/2013
Day of YearDaily PrcpMultiday Prcp
1/1/2014
1/2/2014
1/3/2014 0.00
1/4/2014 0.00
1/5/2014
1/6/2014 0.00
1/7/2014
1/8/2014 0.00
1/9/2014
1/10/2014
1/11/2014
1/12/2014 T
1/13/2014 0.00 **
1/14/2014 **
1/15/2014 **
1/16/2014 **
1/17/2014 **
1/18/2014 **
1/19/2014 **
1/20/2014 **
1/21/2014 0.00
1/22/2014
1/23/2014
1/24/2014
1/25/2014
1/26/2014
1/27/2014
1/28/2014
1/29/2014 T
1/30/2014 0.02
1/31/2014
2/1/2014
2/2/2014 0.06
2/3/2014 0.35
2/4/2014 T
2/5/2014 0.00
2/6/2014 0.65
2/7/2014 0.18
2/8/2014 0.46
2/9/2014 0.76
2/10/2014 0.45
2/11/2014 T
2/12/2014 0.00
2/13/2014 0.00
2/14/2014 0.02
2/15/2014 0.02 **
2/16/2014 **
2/17/2014 0.10
2/18/2014 0.00
2/19/2014 0.02
2/20/2014
2/21/2014 0.00
2/22/2014
2/23/2014 0.00
2/24/2014 0.00
2/25/2014 0.00
2/26/2014 0.00
2/27/2014 0.84
2/28/2014 0.85
3/1/2014 0.76
3/2/2014 0.26
3/3/2014 0.05
3/4/2014 0.07
3/5/2014 0.00
3/6/2014 0.15
3/7/2014 0.02
3/8/2014 0.00
3/9/2014 0.00
3/10/2014 0.00
3/11/2014 0.00
3/12/2014 0.00
3/13/2014
3/14/2014 0.00
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 0.00
3/25/2014 0.00
3/26/2014 0.15
3/27/2014 0.41
3/28/2014 0.01
3/29/2014 0.02
3/30/2014
3/31/2014 0.02
Day of YearDaily PrcpMultiday Prcp
4/1/2014 0.90
4/2/2014 0.58
4/3/2014 0.02
4/4/2014 0.03
4/5/2014 0.10
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 0.02 **
4/26/2014 0.28 **
4/27/2014 T **
4/28/2014 0.00 **
4/29/2014 0.00 **
4/30/2014 **
5/1/2014 **
5/2/2014 0.00 **
5/3/2014 **
5/4/2014 **
5/5/2014 **
5/6/2014 **
5/7/2014 **
5/8/2014 **
5/9/2014 0.03 **
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 0.03 **
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 T **
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 **
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 **
9/16/2014 **
9/17/2014 0.00
9/18/2014 T
9/19/2014 0.03
9/20/2014
9/21/2014 0.00
9/22/2014
9/23/2014
9/24/2014
9/25/2014 0.50
9/26/2014 0.08
9/27/2014 T
9/28/2014
9/29/2014 0.00
9/30/2014



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2013 7:00 AM 0.00 0.0 M M M
10/22/2013 7:00 AM T M M M M heavier, misting fog
10/23/2013 7:00 AM T M M M M agin heavy fog has a mist coming down---
10/24/2013 7:00 AM 0.00 0.0 M M M fog much less dense this am--
10/30/2013 7:00 AM T M M M M chilly (low 40's) and clear this am
11/19/2013 7:00 AM 0.00 0.0 M M M
11/20/2013 7:00 AM 0.38 M M M M
11/21/2013 7:00 AM 0.41 M M M M finally! close to an inch of rain over the past two days!
11/22/2013 7:00 AM 0.03 M M M M
11/23/2013 7:00 AM 0.00 0.0 M M M back to no rain!
12/4/2013 7:00 AM 0.00 0.0 M M M no precipitation but temp was 32 at 6:30am
12/5/2013 7:00 AM 0.00 0.0 M M M again no precipitation---28 degrees this am
12/6/2013 7:00 AM 0.00 0.0 M M M
12/7/2013 7:00 AM 0.65 M M M M lovely gusty winds and rain most of the night;clear and sunny in am
12/8/2013 7:00 AM T M M M M
12/9/2013 7:00 AM 0.00 0.0 M M M
12/20/2013 7:00 AM 0.00 0.0 M M M
12/29/2013 7:00 AM 0.00 0.0 M M M
1/3/2014 7:00 AM 0.00 0.0 M M M smog, no rain continues
1/4/2014 7:00 AM 0.00 0.0 M M M
1/6/2014 7:00 AM 0.00 0.0 M M M ugly,smoggy,DRY weather continues
1/8/2014 7:00 AM 0.00 0.0 M M M
1/12/2014 7:00 AM T M M M M sprinkles during the afternoon;nothing significant
1/13/2014 7:00 AM 0.00 0.0 M M M
1/29/2014 7:00 AM T M M M M the slightest mist in the air--hopefully real rain will arrive today!
1/30/2014 7:00 AM 0.02 M M M M virtually no rain in our area!
2/2/2014 7:00 AM 0.06 M M M M and its still raining!
2/3/2014 7:00 AM 0.35 M M M M
2/4/2014 7:00 AM T M M M M
2/5/2014 7:00 AM 0.00 0.0 M M M
2/6/2014 7:00 AM 0.65 M M M M heavy rain around 6am--lightening up by 7---but more predicted!!
2/7/2014 7:00 AM 0.18 M M M M
2/8/2014 7:00 AM 0.46 M M M M
2/9/2014 7:00 AM 0.76 M M M M light rain at 7am---still getting a wonderful soaking rain;no flooding around us.
2/10/2014 7:00 AM 0.45 M M M M rain turned to showers yesterday afternoon; clearing completely this am
2/11/2014 7:00 AM T M M M M
2/12/2014 7:00 AM 0.00 0.0 M M M
2/13/2014 7:00 AM 0.00 0.0 M M M sunny this am;no fog
2/14/2014 7:00 AM 0.02 M M M M surprised to find moisture this am--
2/15/2014 7:00 AM 0.02 M M M M
2/18/2014 7:00 AM 0.00 0.0 M M M
2/19/2014 7:00 AM 0.02 M M M M
2/21/2014 7:00 AM 0.00 0.0 M M M
2/23/2014 7:00 AM 0.00 0.0 M M M
2/24/2014 7:00 AM 0.00 0.0 M M M
2/25/2014 7:00 AM 0.00 0.0 M M M
2/26/2014 7:00 AM 0.00 0.0 M M M possibly a few drops just at 7am---rain started shortly after 7--
2/27/2014 7:00 AM 0.84 M M M M light mist at 7am; winds are quieter
2/28/2014 7:00 AM 0.85 M M M M not as windy overnight as was predicted.
3/1/2014 7:00 AM 0.76 M M M M
3/2/2014 7:00 AM 0.26 M M M M light rain most of yesterday
3/3/2014 7:00 AM 0.05 M M M M
3/4/2014 7:00 AM 0.07 M M M M
3/5/2014 7:00 AM 0.00 0.0 M M M
3/6/2014 7:00 AM 0.15 M M M M
3/7/2014 7:00 AM 0.02 M M M M
3/8/2014 7:00 AM 0.00 0.0 M M M
3/9/2014 7:00 AM 0.00 0.0 M M M
3/10/2014 7:00 AM 0.00 0.0 M M M
3/11/2014 7:00 AM 0.00 0.0 M M M
3/12/2014 7:00 AM 0.00 0.0 M M M
3/14/2014 7:00 AM 0.00 0.0 M M M
3/24/2014 7:00 AM 0.00 0.0 M M M
3/25/2014 7:00 AM 0.00 0.0 M M M
3/26/2014 7:00 AM 0.15 M M M M
3/27/2014 7:00 AM 0.41 M M M M more rain yesterday!!
3/28/2014 7:00 AM 0.01 M M M M
3/29/2014 7:00 AM 0.02 M M M M
3/31/2014 7:00 AM 0.02 M M M M
4/1/2014 7:00 AM 0.90 M M M M haven't measured this much in 24 hours in quite awhile!
4/2/2014 7:00 AM 0.58 M M M M
4/3/2014 7:00 AM 0.02 M M M M
4/4/2014 7:00 AM 0.03 M M M M
4/5/2014 7:00 AM 0.10 M M M M
4/25/2014 7:00 AM 0.02 M M M M
4/26/2014 7:00 AM 0.28 M M M M
4/27/2014 7:00 AM T M M M M
4/28/2014 7:00 AM 0.00 0.0 M M M
4/29/2014 7:00 AM 0.00 0.0 M M M
5/2/2014 7:00 AM 0.00 0.0 M M M
5/9/2014 7:00 AM 0.03 M M M M
5/20/2014 7:00 AM 0.03 M M M M a bit of moisture overnight!
7/20/2014 7:00 AM T M M M M slightest trace of rain and distant thunder overnight
9/18/2014 7:00 AM T M M M M humid and warm--just a trace of rain at 7am but increasing slightly by 8am
9/19/2014 7:00 AM 0.03 M M M M
9/21/2014 7:00 AM 0.00 0.0 M M M
9/25/2014 7:00 AM 0.50 M M M M started raining around 2 or 3 am--and still raining at 7!!
9/26/2014 7:00 AM 0.08 M M M M
9/27/2014 7:00 AM T M M M M large cumulus clouds all day yesterday but not much rain at our location--
9/29/2014 7:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/11/2013 10/19/2013 7:00 AM 9 0.00 M M
10/31/2013 11/07/2013 7:00 AM 8 0.00 M M
11/1/2013 11/11/2013 7:00 AM 11 0.00 M M
11/26/2013 11/29/2013 7:00 AM 4 0.00 M M
1/13/2014 1/21/2014 7:00 AM 9 0.00 M M
2/15/2014 2/17/2014 4:00 PM 3 0.10 M M
4/6/2014 4/24/2014 7:00 AM 19 0.00 M M
4/7/2014 9/17/2014 7:00 AM 164 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