Station Overview Station Location
Station Number CA-AL-2 Latitude 37.707518
Station Name Castro Valley 0.5 WSW Longitude -122.068694
County Alameda Elevation (ft) 287



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 10 1.25 0.00 24 0.00 24 0.00 0 0 0 0 0.0 0 0
Nov 10 2.91 3.54 30 3.54 30 0.00 0 0 10 1 0.0 0 0
Dec 10 4.09 7.15 31 7.15 31 0.00 0 0 15 5 0.0 0 0
Jan 11 4.51 1.01 31 1.01 31 0.00 0 0 6 1 0.0 0 0
Feb 11 4.37 4.24 28 4.24 28 0.00 0 0 9 1 0.0 0 0
March 11 3.64 6.97 31 6.97 31 0.00 0 0 16 3 0.0 0 0
April 11 1.54 0.22 14 0.22 14 0.00 0 0 3 0 0.0 0 0
May 11 0.82 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 11 0.20 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 11 0.02 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 11 0.06 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 11 0.23 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 23.64" 23.13" 189 days 23.13" 189 0.00" 0 days 0 59 days 11 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
10/1/2010 0.00
10/2/2010 0.00
10/3/2010 0.00
10/4/2010 0.00
10/5/2010 0.00
10/6/2010 0.00
10/7/2010 0.00
10/8/2010 0.00
10/9/2010 0.00
10/10/2010 0.00
10/11/2010 0.00
10/12/2010 0.00
10/13/2010 0.00
10/14/2010 0.00
10/15/2010 0.00
10/16/2010 0.00
10/17/2010 0.00
10/18/2010
10/19/2010 0.00
10/20/2010 0.00
10/21/2010 0.00
10/22/2010
10/23/2010
10/24/2010
10/25/2010
10/26/2010 0.00
10/27/2010 0.00
10/28/2010 0.00
10/29/2010 0.00
10/30/2010
10/31/2010
11/1/2010 0.00
11/2/2010 0.00
11/3/2010 0.00
11/4/2010 0.00
11/5/2010 0.00
11/6/2010 0.00
11/7/2010 0.20
11/8/2010 0.69
11/9/2010 0.00
11/10/2010 0.15
11/11/2010 0.00
11/12/2010 0.00
11/13/2010 0.00
11/14/2010 0.00
11/15/2010 0.00
11/16/2010 0.00
11/17/2010 0.00
11/18/2010 0.00
11/19/2010 T
11/20/2010 0.44
11/21/2010 1.05
11/22/2010 0.15
11/23/2010 0.37
11/24/2010 0.04
11/25/2010 0.00
11/26/2010 0.00
11/27/2010 0.06
11/28/2010 0.39
11/29/2010 0.00
11/30/2010 0.00
12/1/2010 T
12/2/2010 0.00
12/3/2010 0.04
12/4/2010 0.00
12/5/2010 0.01
12/6/2010 0.53
12/7/2010 0.00
12/8/2010 0.07
12/9/2010 0.74
12/10/2010 0.02
12/11/2010 T
12/12/2010 0.00
12/13/2010 0.00
12/14/2010 0.16
12/15/2010 0.39
12/16/2010 0.00
12/17/2010 0.20
12/18/2010 0.60
12/19/2010 1.44
12/20/2010 0.25
12/21/2010 T
12/22/2010 0.23
12/23/2010 T
12/24/2010 0.00
12/25/2010 0.00
12/26/2010 0.72
12/27/2010 0.00
12/28/2010 0.00
12/29/2010 1.75
12/30/2010 T
12/31/2010 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.10
1/2/2011 0.12
1/3/2011 0.04
1/4/2011 0.00
1/5/2011 0.00
1/6/2011 0.00
1/7/2011 0.00
1/8/2011 0.00
1/9/2011 T
1/10/2011 0.00
1/11/2011 0.00
1/12/2011 0.00
1/13/2011 0.00
1/14/2011 0.16
1/15/2011 0.00
1/16/2011 0.00
1/17/2011 0.00
1/18/2011 0.00
1/19/2011 0.00
1/20/2011 0.00
1/21/2011 0.00
1/22/2011 0.00
1/23/2011 0.00
1/24/2011 0.00
1/25/2011 0.00
1/26/2011 0.00
1/27/2011 0.00
1/28/2011 0.00
1/29/2011 0.00
1/30/2011 0.34
1/31/2011 0.25
2/1/2011 0.00
2/2/2011 0.00
2/3/2011 0.00
2/4/2011 0.00
2/5/2011 0.00
2/6/2011 0.00
2/7/2011 0.00
2/8/2011 0.00
2/9/2011 0.00
2/10/2011 0.00
2/11/2011 0.00
2/12/2011 0.00
2/13/2011 0.00
2/14/2011 0.03
2/15/2011 0.05
2/16/2011 0.74
2/17/2011 0.54
2/18/2011 0.64
2/19/2011 0.92
2/20/2011 0.29
2/21/2011 0.00
2/22/2011 0.00
2/23/2011 0.00
2/24/2011 T
2/25/2011 0.82
2/26/2011 0.21
2/27/2011 0.00
2/28/2011 0.00
3/1/2011 0.00
3/2/2011 0.06
3/3/2011 0.00
3/4/2011 0.00
3/5/2011 0.00
3/6/2011 0.29
3/7/2011 0.21
3/8/2011 0.07
3/9/2011 0.00
3/10/2011 0.00
3/11/2011 T
3/12/2011 0.00
3/13/2011 0.00
3/14/2011 0.40
3/15/2011 0.00
3/16/2011 0.40
3/17/2011 T
3/18/2011 T
3/19/2011 1.03
3/20/2011 1.07
3/21/2011 0.20
3/22/2011 0.06
3/23/2011 0.44
3/24/2011 0.32
3/25/2011 1.71
3/26/2011 0.56
3/27/2011 0.12
3/28/2011 0.03
3/29/2011 0.00
3/30/2011 0.00
3/31/2011 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.00
4/2/2011 0.00
4/3/2011 0.00
4/4/2011 0.00
4/5/2011 0.00
4/6/2011 0.00
4/7/2011 0.03
4/8/2011 0.01
4/9/2011 0.00
4/10/2011 0.00
4/11/2011 0.00
4/12/2011 0.00
4/13/2011 0.00
4/14/2011 0.18
4/15/2011
4/16/2011
4/17/2011
4/18/2011
4/19/2011
4/20/2011
4/21/2011
4/22/2011
4/23/2011
4/24/2011
4/25/2011
4/26/2011
4/27/2011
4/28/2011
4/29/2011
4/30/2011
5/1/2011
5/2/2011
5/3/2011
5/4/2011
5/5/2011
5/6/2011
5/7/2011
5/8/2011
5/9/2011
5/10/2011
5/11/2011
5/12/2011
5/13/2011
5/14/2011
5/15/2011
5/16/2011
5/17/2011
5/18/2011
5/19/2011
5/20/2011
5/21/2011
5/22/2011
5/23/2011
5/24/2011
5/25/2011
5/26/2011
5/27/2011
5/28/2011
5/29/2011
5/30/2011
5/31/2011
6/1/2011
6/2/2011
6/3/2011
6/4/2011
6/5/2011
6/6/2011
6/7/2011
6/8/2011
6/9/2011
6/10/2011
6/11/2011
6/12/2011
6/13/2011
6/14/2011
6/15/2011
6/16/2011
6/17/2011
6/18/2011
6/19/2011
6/20/2011
6/21/2011
6/22/2011
6/23/2011
6/24/2011
6/25/2011
6/26/2011
6/27/2011
6/28/2011
6/29/2011
6/30/2011
Day of YearDaily PrcpMultiday Prcp
7/1/2011
7/2/2011
7/3/2011
7/4/2011
7/5/2011
7/6/2011
7/7/2011
7/8/2011
7/9/2011
7/10/2011
7/11/2011
7/12/2011
7/13/2011
7/14/2011
7/15/2011
7/16/2011
7/17/2011
7/18/2011
7/19/2011
7/20/2011
7/21/2011
7/22/2011
7/23/2011
7/24/2011
7/25/2011
7/26/2011
7/27/2011
7/28/2011
7/29/2011
7/30/2011
7/31/2011
8/1/2011
8/2/2011
8/3/2011
8/4/2011
8/5/2011
8/6/2011
8/7/2011
8/8/2011
8/9/2011
8/10/2011
8/11/2011
8/12/2011
8/13/2011
8/14/2011
8/15/2011
8/16/2011
8/17/2011
8/18/2011
8/19/2011
8/20/2011
8/21/2011
8/22/2011
8/23/2011
8/24/2011
8/25/2011
8/26/2011
8/27/2011
8/28/2011
8/29/2011
8/30/2011
8/31/2011
9/1/2011
9/2/2011
9/3/2011
9/4/2011
9/5/2011
9/6/2011
9/7/2011
9/8/2011
9/9/2011
9/10/2011
9/11/2011
9/12/2011
9/13/2011
9/14/2011
9/15/2011
9/16/2011
9/17/2011
9/18/2011
9/19/2011
9/20/2011
9/21/2011
9/22/2011
9/23/2011
9/24/2011
9/25/2011
9/26/2011
9/27/2011
9/28/2011
9/29/2011
9/30/2011



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 0.00 0.0 M M M
10/2/2010 7:00 AM 0.00 0.0 M M M
10/3/2010 7:00 AM 0.00 0.0 M M M
10/4/2010 7:00 AM 0.00 0.0 M M M
10/5/2010 7:00 AM 0.00 0.0 M M M
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 7:00 AM 0.00 0.0 M M M
10/8/2010 7:00 AM 0.00 0.0 M M M
10/9/2010 7:00 AM 0.00 0.0 M M M
10/10/2010 7:00 AM 0.00 0.0 M M M
10/11/2010 7:00 AM 0.00 0.0 M M M
10/12/2010 7:00 AM 0.00 0.0 M M M
10/13/2010 7:00 AM 0.00 0.0 M M M
10/14/2010 7:00 AM 0.00 0.0 M M M
10/15/2010 7:00 AM 0.00 0.0 M M M
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/19/2010 7:00 AM 0.00 0.0 M M M
10/20/2010 7:00 AM 0.00 0.0 M M M
10/21/2010 7:00 AM 0.00 0.0 M M M
10/26/2010 7:00 AM 0.00 0.0 M M M
10/27/2010 7:00 AM 0.00 0.0 M M M
10/28/2010 7:00 AM 0.00 0.0 M M M
10/29/2010 7:00 AM 0.00 0.0 M M M
11/1/2010 7:00 AM 0.00 0.0 M M M
11/2/2010 7:00 AM 0.00 0.0 M M M
11/3/2010 7:00 AM 0.00 0.0 M M M
11/4/2010 7:00 AM 0.00 0.0 M M M
11/5/2010 7:00 AM 0.00 0.0 M M M
11/6/2010 7:00 AM 0.00 0.0 M M M
11/7/2010 7:00 AM 0.20 M M M M
11/8/2010 7:00 AM 0.69 M M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.15 M M M M
11/11/2010 7:00 AM 0.00 0.0 M M M
11/12/2010 7:00 AM 0.00 0.0 M M M
11/13/2010 7:00 AM 0.00 0.0 M M M
11/14/2010 7:00 AM 0.00 0.0 M M M
11/15/2010 7:00 AM 0.00 0.0 M M M
11/16/2010 7:00 AM 0.00 0.0 M M M
11/17/2010 7:00 AM 0.00 0.0 M M M
11/18/2010 7:00 AM 0.00 0.0 M M M
11/19/2010 7:00 AM T M M M M
11/20/2010 7:00 AM 0.44 M M M M
11/21/2010 7:00 AM 1.05 M M M M periods of heavy rainfall during evening hours, with some thunder
11/22/2010 7:00 AM 0.15 M M M M
11/23/2010 7:00 AM 0.37 M M M M
11/24/2010 7:00 AM 0.04 M M M M
11/25/2010 7:00 AM 0.00 0.0 M M M
11/26/2010 7:00 AM 0.00 0.0 M M M
11/27/2010 7:00 AM 0.06 M M M M rain just beginning
11/28/2010 7:00 AM 0.39 M M M M several moderate downpours, followed by the 5th night of frost in a row - unusual for this time of year
11/29/2010 7:00 AM 0.00 0.0 M M M
11/30/2010 7:00 AM 0.00 0.0 M M M
12/1/2010 7:00 AM T M M M M A few sprinkles at 7:30 PM
12/2/2010 7:00 AM 0.00 0.0 M M M
12/3/2010 7:00 AM 0.04 M M M M
12/4/2010 7:00 AM 0.00 0.0 M M M
12/5/2010 7:00 AM 0.01 M M M M
12/6/2010 7:00 AM 0.53 M M M M rainfall was sporatic and heavy at times. On the east end of Crow Canyon Road the rainfall was heavy enough to cause hydroplaning for the Christmas shoppers.
12/7/2010 7:00 AM 0.00 0.0 M M M
12/8/2010 7:00 AM 0.07 M M M M steady light rain just beginning - looks to be a soggy day
12/9/2010 7:00 AM 0.74 M M M M
12/10/2010 7:00 AM 0.02 M M M M
12/11/2010 7:00 AM T M M M M misty sprinkles yesterday late morning
12/12/2010 7:00 AM 0.00 0.0 M M M
12/13/2010 7:00 AM 0.00 0.0 M M M
12/14/2010 7:00 AM 0.16 M M M M
12/15/2010 7:00 AM 0.39 M M M M
12/16/2010 7:00 AM 0.00 0.0 M M M
12/17/2010 7:00 AM 0.20 M M M M
12/18/2010 7:00 AM 0.60 M M M M gusty and rainy during late night/early morning
12/19/2010 7:00 AM 1.44 M M M M very heavy rain during late night hours
12/20/2010 7:00 AM 0.25 M M M M
12/21/2010 7:00 AM T M M M M
12/22/2010 7:00 AM 0.23 M M M M
12/23/2010 7:00 AM T M M M M
12/24/2010 7:00 AM 0.00 0.0 M M M
12/25/2010 7:00 AM 0.00 0.0 M M M
12/26/2010 7:00 AM 0.72 M M M M some heavy rainfall during dinner hours
12/27/2010 7:00 AM 0.00 0.0 M M M
12/28/2010 7:00 AM 0.00 0.0 M M M
12/29/2010 7:00 AM 1.75 M M M M heavy steady rain and high winds during late night hours
12/30/2010 7:00 AM T M M M M hail yesterday morning
12/31/2010 7:00 AM 0.00 0.0 M M M
1/1/2011 7:00 AM 0.10 M M M M steady drizzle
1/2/2011 7:00 AM 0.12 M M M M
1/3/2011 7:00 AM 0.04 M M M M
1/4/2011 7:00 AM 0.00 0.0 M M M
1/5/2011 7:00 AM 0.00 0.0 M M M
1/6/2011 7:00 AM 0.00 0.0 M M M
1/7/2011 7:00 AM 0.00 0.0 M M M
1/8/2011 7:00 AM 0.00 0.0 M M M
1/9/2011 7:00 AM T M M M M early morning mist
1/10/2011 7:00 AM 0.00 0.0 M M M
1/11/2011 7:00 AM 0.00 0.0 M M M
1/12/2011 7:00 AM 0.00 0.0 M M M
1/13/2011 7:00 AM 0.00 0.0 M M M
1/14/2011 7:00 AM 0.16 M M M M drizzle began approximately 7:15 am
1/15/2011 7:00 AM 0.00 0.0 M M M
1/16/2011 7:00 AM 0.00 0.0 M M M
1/17/2011 7:00 AM 0.00 0.0 M M M
1/18/2011 7:00 AM 0.00 0.0 M M M
1/19/2011 7:00 AM 0.00 0.0 M M M
1/20/2011 7:00 AM 0.00 0.0 M M M
1/21/2011 7:00 AM 0.00 0.0 M M M
1/22/2011 7:00 AM 0.00 0.0 M M M
1/23/2011 7:00 AM 0.00 0.0 M M M
1/24/2011 7:00 AM 0.00 0.0 M M M
1/25/2011 7:00 AM 0.00 0.0 M M M
1/26/2011 7:00 AM 0.00 0.0 M M M
1/27/2011 7:00 AM 0.00 0.0 M M M
1/28/2011 7:00 AM 0.00 0.0 M M M
1/29/2011 7:00 AM 0.00 0.0 M M M
1/30/2011 7:00 AM 0.34 M M M M
1/31/2011 7:00 AM 0.25 0.0 M M M
2/1/2011 7:00 AM 0.00 0.0 M M M
2/2/2011 7:00 AM 0.00 0.0 M M M
2/3/2011 7:00 AM 0.00 0.0 M M M
2/4/2011 7:00 AM 0.00 0.0 M M M
2/5/2011 7:00 AM 0.00 0.0 M M M
2/6/2011 7:00 AM 0.00 0.0 M M M
2/7/2011 7:00 AM 0.00 0.0 M M M
2/8/2011 7:00 AM 0.00 0.0 M M M
2/9/2011 7:00 AM 0.00 0.0 M M M
2/10/2011 7:00 AM 0.00 0.0 M M M
2/11/2011 7:00 AM 0.00 0.0 M M M
2/12/2011 7:00 AM 0.00 0.0 M M M
2/13/2011 7:00 AM 0.00 0.0 M M M
2/14/2011 7:00 AM 0.03 M M M M rainfall began at 4:15 am
2/15/2011 7:00 AM 0.05 M M M M
2/16/2011 7:00 AM 0.74 M M M M all rainfall during late evening/early morning hours. Some very heavy downpours beginning after 12:30 am
2/17/2011 7:00 AM 0.54 M M M M
2/18/2011 7:00 AM 0.64 M M M M
2/19/2011 7:00 AM 0.92 M M M M
2/20/2011 7:00 AM 0.29 M M M M
2/21/2011 7:00 AM 0.00 0.0 M M M
2/22/2011 7:00 AM 0.00 0.0 M M M
2/23/2011 7:00 AM 0.00 0.0 M M M
2/24/2011 7:00 AM T M M M M
2/25/2011 7:00 AM 0.82 M M M M
2/26/2011 7:00 AM 0.21 M M M M hard frost - no snow
2/27/2011 7:00 AM 0.00 0.0 M M M hard frost
2/28/2011 7:00 AM 0.00 0.0 M M M hard frost
3/1/2011 7:00 AM 0.00 0.0 M M M
3/2/2011 7:00 AM 0.06 M M M M
3/3/2011 7:00 AM 0.00 0.0 M M M
3/4/2011 7:00 AM 0.00 0.0 M M M
3/5/2011 7:00 AM 0.00 0.0 M M M
3/6/2011 7:00 AM 0.29 0.0 M M M
3/7/2011 7:00 AM 0.21 M M M M
3/8/2011 7:00 AM 0.07 M M M M
3/9/2011 7:00 AM 0.00 0.0 M M M
3/10/2011 7:00 AM 0.00 0.0 M M M
3/11/2011 7:00 AM T M M M M
3/12/2011 7:00 AM 0.00 0.0 M M M
3/13/2011 7:00 AM 0.00 0.0 M M M
3/14/2011 7:00 AM 0.40 M M M M
3/15/2011 7:00 AM 0.00 0.0 M M M
3/16/2011 7:00 AM 0.40 M M M M
3/17/2011 7:00 AM T M M M M
3/18/2011 7:00 AM T M M M M
3/19/2011 7:00 AM 1.03 M M M M .80" fell between 11:00 AM and 4:00 PM
3/20/2011 7:00 AM 1.07 M M M M
3/21/2011 7:00 AM 0.20 M M M M
3/22/2011 7:00 AM 0.06 M M M M
3/23/2011 7:00 AM 0.44 M M M M
3/24/2011 7:00 AM 0.32 M M M M
3/25/2011 7:00 AM 1.71 M M M M extremely heavy rainfall between noon and 1pm
3/26/2011 7:00 AM 0.56 M M M M
3/27/2011 7:00 AM 0.12 M M M M
3/28/2011 7:00 AM 0.03 M M M M
3/29/2011 7:00 AM 0.00 0.0 M M M glorious sunshine returns!
3/30/2011 7:00 AM 0.00 0.0 M M M
3/31/2011 7:00 AM 0.00 0.0 M M M
4/1/2011 7:00 AM 0.00 0.0 M M M
4/2/2011 7:00 AM 0.00 0.0 M M M
4/3/2011 7:00 AM 0.00 0.0 M M M
4/4/2011 7:00 AM 0.00 0.0 M M M
4/5/2011 7:00 AM 0.00 0.0 M M M
4/6/2011 7:00 AM 0.00 0.0 M M M
4/7/2011 7:00 AM 0.03 M M M M showers after midnight
4/8/2011 7:00 AM 0.01 M M M M hailstorm at 7:30 PM
4/9/2011 7:00 AM 0.00 0.0 M M M
4/10/2011 7:00 AM 0.00 0.0 M M M
4/11/2011 7:00 AM 0.00 0.0 M M M
4/12/2011 7:00 AM 0.00 0.0 M M M
4/13/2011 7:00 AM 0.00 0.0 M M M
4/14/2011 7:00 AM 0.18 M M M M heavy downpour in AM



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