Station Overview Station Location
Station Number CA-CC-19 Latitude 37.915959
Station Name Walnut Creek 1.4 NE Longitude -122.023194
County Contra Costa Elevation (ft) 156



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 09 1.08 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 09 2.51 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 09 3.83 0.33 5 0.33 5 0.00 0 0 2 0 0.0 0 0
Jan 10 4.06 6.20 31 6.20 31 0.00 0 0 16 0 0.0 0 0
Feb 10 4.03 2.46 30 2.21 21 0.25 9 2 10 2 0.0 0 0
March 10 2.90 1.88 23 1.88 20 0.00 3 1 10 0 0.0 0 0
April 10 1.20 3.01 22 3.01 22 0.00 0 0 13 2 0.0 0 0
May 10 0.76 0.87 13 0.87 13 0.00 0 0 5 0 0.0 0 0
June 10 0.13 0.00 15 0.00 15 0.00 0 0 0 0 0.0 0 0
July 10 0.02 0.00 4 0.00 4 0.00 0 0 0 0 0.0 0 0
Aug 10 0.06 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 0
Sept 10 0.15 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 20.73" 14.75" 144 days 14.50" 132 0.25" 12 days 3 56 days 4 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
10/1/2009
10/2/2009
10/3/2009
10/4/2009
10/5/2009
10/6/2009
10/7/2009
10/8/2009
10/9/2009
10/10/2009
10/11/2009
10/12/2009
10/13/2009
10/14/2009
10/15/2009
10/16/2009
10/17/2009
10/18/2009
10/19/2009
10/20/2009
10/21/2009
10/22/2009
10/23/2009
10/24/2009
10/25/2009
10/26/2009
10/27/2009
10/28/2009
10/29/2009
10/30/2009
10/31/2009
11/1/2009
11/2/2009
11/3/2009
11/4/2009
11/5/2009
11/6/2009
11/7/2009
11/8/2009
11/9/2009
11/10/2009
11/11/2009
11/12/2009
11/13/2009
11/14/2009
11/15/2009
11/16/2009
11/17/2009
11/18/2009
11/19/2009
11/20/2009
11/21/2009
11/22/2009
11/23/2009
11/24/2009
11/25/2009
11/26/2009
11/27/2009
11/28/2009
11/29/2009
11/30/2009
12/1/2009
12/2/2009
12/3/2009
12/4/2009
12/5/2009
12/6/2009
12/7/2009
12/8/2009
12/9/2009
12/10/2009
12/11/2009
12/12/2009
12/13/2009
12/14/2009
12/15/2009
12/16/2009
12/17/2009
12/18/2009
12/19/2009
12/20/2009
12/21/2009
12/22/2009
12/23/2009
12/24/2009
12/25/2009
12/26/2009
12/27/2009 0.31
12/28/2009 0.00
12/29/2009 0.00
12/30/2009 0.02
12/31/2009 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.00
1/2/2010 0.01
1/3/2010 0.00
1/4/2010 0.00
1/5/2010 0.00
1/6/2010 0.00
1/7/2010 0.00
1/8/2010 0.00
1/9/2010 0.02
1/10/2010 0.00
1/11/2010 0.00
1/12/2010 0.08
1/13/2010 0.15
1/14/2010 0.00
1/15/2010 0.00
1/16/2010 0.00
1/17/2010 0.01
1/18/2010 0.06
1/19/2010 1.25
1/20/2010 1.55
1/21/2010 1.10
1/22/2010 0.65
1/23/2010 0.12
1/24/2010 0.03
1/25/2010 0.33
1/26/2010 0.16
1/27/2010 0.53
1/28/2010 0.00
1/29/2010 0.00
1/30/2010 0.15
1/31/2010 0.00
2/1/2010 0.00
2/2/2010 0.00
2/3/2010 0.00
2/4/2010 0.00
2/5/2010 0.33
2/6/2010 0.14
2/7/2010 0.02
2/8/2010 0.00
2/9/2010 0.18
2/10/2010 0.01
2/11/2010 T
2/12/2010 T
2/13/2010 0.02
2/14/2010 0.00 **
2/15/2010 **
2/16/2010 0.00 0.00
2/17/2010 0.00
2/18/2010 **
2/19/2010 **
2/20/2010 **
2/21/2010 **
2/22/2010 **
2/23/2010 0.25
2/24/2010 0.67
2/25/2010 0.01
2/26/2010 0.00
2/27/2010 0.81
2/28/2010 0.02
3/1/2010 0.00
3/2/2010 0.02
3/3/2010 0.58
3/4/2010 0.24
3/5/2010
3/6/2010
3/7/2010
3/8/2010 0.00
3/9/2010 0.01
3/10/2010 0.36
3/11/2010 0.02
3/12/2010 0.00
3/13/2010 0.41
3/14/2010
3/15/2010 0.00
3/16/2010 0.00
3/17/2010
3/18/2010
3/19/2010 **
3/20/2010 **
3/21/2010 0.00
3/22/2010
3/23/2010
3/24/2010 0.00
3/25/2010 0.03
3/26/2010 0.02
3/27/2010 0.00
3/28/2010 0.00
3/29/2010 0.00
3/30/2010 0.19
3/31/2010 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2010 0.07
4/2/2010 T
4/3/2010 0.05
4/4/2010
4/5/2010 0.72
4/6/2010 0.03
4/7/2010
4/8/2010
4/9/2010 0.00
4/10/2010 0.00
4/11/2010
4/12/2010 1.16
4/13/2010 0.13
4/14/2010
4/15/2010
4/16/2010
4/17/2010 0.00
4/18/2010
4/19/2010 0.00
4/20/2010 0.31
4/21/2010 0.01
4/22/2010 0.18
4/23/2010 0.01
4/24/2010 0.00
4/25/2010 0.00
4/26/2010 0.00
4/27/2010 T
4/28/2010 0.14
4/29/2010 0.18
4/30/2010 0.02
5/1/2010 0.00
5/2/2010 0.00
5/3/2010 0.00
5/4/2010
5/5/2010
5/6/2010 0.00
5/7/2010
5/8/2010
5/9/2010
5/10/2010 0.00
5/11/2010 0.25
5/12/2010 0.01
5/13/2010 0.00
5/14/2010
5/15/2010
5/16/2010 0.00
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010 0.29
5/27/2010 0.01
5/28/2010 0.31
5/29/2010
5/30/2010
5/31/2010 0.00
6/1/2010
6/2/2010
6/3/2010
6/4/2010 0.00
6/5/2010 0.00
6/6/2010 0.00
6/7/2010 0.00
6/8/2010
6/9/2010
6/10/2010 0.00
6/11/2010 0.00
6/12/2010 0.00
6/13/2010 0.00
6/14/2010 0.00
6/15/2010 0.00
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010 0.00
6/24/2010
6/25/2010
6/26/2010 0.00
6/27/2010 0.00
6/28/2010 0.00
6/29/2010
6/30/2010 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010 0.00
7/4/2010 0.00
7/5/2010 0.00
7/6/2010
7/7/2010
7/8/2010
7/9/2010 0.00
7/10/2010
7/11/2010
7/12/2010
7/13/2010
7/14/2010
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010
7/21/2010
7/22/2010
7/23/2010
7/24/2010
7/25/2010
7/26/2010
7/27/2010
7/28/2010
7/29/2010
7/30/2010
7/31/2010
8/1/2010
8/2/2010
8/3/2010
8/4/2010
8/5/2010
8/6/2010
8/7/2010
8/8/2010
8/9/2010 0.00
8/10/2010
8/11/2010
8/12/2010
8/13/2010
8/14/2010
8/15/2010
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010
9/2/2010
9/3/2010
9/4/2010
9/5/2010
9/6/2010
9/7/2010
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010
9/13/2010
9/14/2010
9/15/2010
9/16/2010
9/17/2010
9/18/2010
9/19/2010
9/20/2010
9/21/2010
9/22/2010
9/23/2010
9/24/2010
9/25/2010
9/26/2010
9/27/2010
9/28/2010
9/29/2010
9/30/2010



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
12/27/2009 7:15 AM 0.31 M M M M
12/28/2009 7:15 AM 0.00 0.0 M M M
12/29/2009 7:15 AM 0.00 0.0 M M M
12/30/2009 7:15 AM 0.02 M M M M
12/31/2009 7:15 AM 0.00 0.0 M M M
1/1/2010 7:15 AM 0.00 0.0 M M M
1/2/2010 7:15 AM 0.01 M M M M
1/3/2010 7:15 AM 0.00 0.0 M M M
1/4/2010 7:15 AM 0.00 0.0 M M M
1/5/2010 7:15 AM 0.00 0.0 M M M
1/6/2010 7:15 AM 0.00 0.0 M M M foggy
1/7/2010 7:15 AM 0.00 0.0 M M M Dense fog
1/8/2010 7:15 AM 0.00 0.0 M M M Foggy
1/9/2010 7:15 AM 0.02 M M M M Foggy
1/10/2010 7:15 AM 0.00 0.0 M M M Very dense fog
1/11/2010 7:15 AM 0.00 0.0 M M M Foggy
1/12/2010 7:15 AM 0.08 M M M M
1/13/2010 7:15 AM 0.15 M M M M
1/14/2010 7:15 AM 0.00 0.0 M M M
1/15/2010 7:15 AM 0.00 0.0 M M M Very dense ground fog
1/16/2010 7:15 AM 0.00 0.0 M M M Foggy
1/17/2010 7:15 AM 0.01 M M M M
1/18/2010 7:15 AM 0.06 M M M M Drizzling
1/19/2010 7:15 AM 1.25 M M M M
1/20/2010 7:15 AM 1.55 M M M M Jan 19 Between 7AM and 11AM .52", from 11A to 7:30P .42" and from 7:30P to 7A Jan 20 - .61"
1/21/2010 7:15 AM 1.10 M M M M .76 by 12:30 PM on Jan 20 Strong wind gusts all morning.
1/22/2010 7:15 AM 0.65 M M M M
1/23/2010 7:15 AM 0.12 M M M M
1/24/2010 7:15 AM 0.03 M M M M Very foggy
1/25/2010 7:15 AM 0.33 M M M M
1/26/2010 7:15 AM 0.16 M M M M Foggy
1/27/2010 7:15 AM 0.53 M M M M Very foggy
1/28/2010 7:15 AM 0.00 0.0 M M M
1/29/2010 7:15 AM 0.00 0.0 M M M
1/30/2010 7:15 AM 0.15 M M M M
1/31/2010 7:15 AM 0.00 0.0 M M M Dense ground fog
2/1/2010 7:15 AM 0.00 0.0 M M M
2/2/2010 7:15 AM 0.00 0.0 M M M
2/3/2010 7:15 AM 0.00 0.0 M M M
2/4/2010 7:15 AM 0.00 0.0 M M M
2/5/2010 7:15 AM 0.33 M M M M
2/6/2010 7:15 AM 0.14 M M M M
2/7/2010 7:15 AM 0.02 M M M M
2/8/2010 7:15 AM 0.00 0.0 M M M
2/9/2010 7:15 AM 0.18 M M M M
2/10/2010 7:15 AM 0.01 M M M M
2/11/2010 7:15 AM T M M M M
2/12/2010 7:15 AM T M M M M
2/13/2010 7:15 AM 0.02 M M M M
2/14/2010 7:15 AM 0.00 0.0 M M M
2/16/2010 7:15 AM 0.00 0.0 M M M
2/17/2010 7:15 AM 0.00 0.0 M M M
2/24/2010 7:15 AM 0.67 M M M M
2/25/2010 7:15 AM 0.01 M M M M
2/26/2010 7:15 AM 0.00 0.0 M M M
2/27/2010 7:15 AM 0.81 M M M M Currently drizzling
2/28/2010 7:15 AM 0.02 M M M M
3/1/2010 7:15 AM 0.00 0.0 M M M
3/2/2010 7:15 AM 0.02 M M M M Overcast skies, rain is beginning.
3/3/2010 7:15 AM 0.58 M M M M Raining steadily
3/4/2010 7:15 AM 0.24 M M M M Blue skies, no fog
3/8/2010 7:15 AM 0.00 0.0 M M M
3/9/2010 7:15 AM 0.01 M M M M
3/10/2010 7:15 AM 0.36 M M M M
3/11/2010 7:15 AM 0.02 M M M M
3/12/2010 7:15 AM 0.00 0.0 M M M Cloudy skies
3/13/2010 7:15 AM 0.41 M M M M Clear skies, bright sun - light frost on rooftops
3/15/2010 7:15 AM 0.00 0.0 M M M Clear skies
3/16/2010 7:15 AM 0.00 0.0 M M M
3/24/2010 7:15 AM 0.00 0.0 M M M Overcast skies
3/25/2010 7:15 AM 0.03 M M M M Overcast skies
3/26/2010 7:15 AM 0.02 M M M M
3/27/2010 7:15 AM 0.00 0.0 M M M
3/28/2010 7:15 AM 0.00 0.0 M M M
3/29/2010 7:15 AM 0.00 0.0 M M M
3/30/2010 7:15 AM 0.19 M M M M
3/31/2010 7:15 AM 0.00 0.0 M M M Cloudy skies at reading time - 7:15A, no rain currently. Now blue skies at 8:15A.
4/1/2010 7:15 AM 0.07 M M M M
4/2/2010 7:15 AM T M M M M
4/3/2010 7:15 AM 0.05 M M M M
4/5/2010 7:15 AM 0.72 M M M M
4/6/2010 7:15 AM 0.03 M M M M Blue skies, light frost on all roof tops. 39.9 degrees at 7:15 AM
4/9/2010 7:15 AM 0.00 0.0 M M M Clear blue skies
4/10/2010 7:15 AM 0.00 0.0 M M M Overcast skies, very windy
4/12/2010 7:15 AM 1.16 M M M M
4/13/2010 7:15 AM 0.13 M M M M
4/17/2010 7:15 AM 0.00 0.0 M M M
4/19/2010 7:15 AM 0.00 0.0 M M M
4/20/2010 7:15 AM 0.31 M M M M Overcast skies, between bands of showers
4/21/2010 7:15 AM 0.01 M M M M Overcast skies, light sprinkles
4/22/2010 7:15 AM 0.18 M M M M
4/23/2010 7:15 AM 0.01 M M M M Very foggy
4/24/2010 7:15 AM 0.00 0.0 M M M Clear skies
4/25/2010 7:15 AM 0.00 0.0 M M M Clear skies. 51 deg
4/26/2010 7:15 AM 0.00 0.0 M M M Clear skies
4/27/2010 7:15 AM T M M M M Overcast skies, windy
4/28/2010 7:15 AM 0.14 M M M M Still raining
4/29/2010 7:15 AM 0.18 M M M M Chilly, clear skies
4/30/2010 7:15 AM 0.02 M M M M
5/1/2010 7:15 AM 0.00 0.0 M M M Clear skies
5/2/2010 7:15 AM 0.00 0.0 M M M
5/3/2010 7:15 AM 0.00 0.0 M M M Clear skies - calm
5/6/2010 7:15 AM 0.00 0.0 M M M
5/10/2010 7:15 AM 0.00 0.0 M M M
5/11/2010 7:15 AM 0.25 M M M M
5/12/2010 7:15 AM 0.01 M M M M
5/13/2010 7:15 AM 0.00 0.0 M M M
5/16/2010 7:15 AM 0.00 0.0 M M M Overcast skies
5/26/2010 7:15 AM 0.29 M M M M
5/27/2010 7:15 AM 0.01 M M M M
5/28/2010 7:15 AM 0.31 M M M M
5/31/2010 7:15 AM 0.00 0.0 M M M
6/4/2010 7:15 AM 0.00 0.0 M M M Very overcast skies
6/5/2010 7:15 AM 0.00 0.0 M M M Clear skies
6/6/2010 7:15 AM 0.00 0.0 M M M
6/7/2010 7:15 AM 0.00 0.0 M M M Clear skies, light winds
6/10/2010 7:15 AM 0.00 0.0 M M M
6/11/2010 7:15 AM 0.00 0.0 M M M
6/12/2010 7:15 AM 0.00 0.0 M M M Winds died down last evening by 8PM. Fires on the Shell Ridge - could still see some trees burning at 10PM. No smoke this AM but very strong gusts of wind.
6/13/2010 7:15 AM 0.00 0.0 M M M
6/14/2010 7:15 AM 0.00 0.0 M M M
6/15/2010 7:15 AM 0.00 0.0 M M M
6/23/2010 7:15 AM 0.00 0.0 M M M Cumulus clouds at 7AM, no clouds by 9AM
6/26/2010 7:15 AM 0.00 0.0 M M M Clear skies
6/27/2010 7:15 AM 0.00 0.0 M M M
6/28/2010 7:15 AM 0.00 0.0 M M M
6/30/2010 7:15 AM 0.00 0.0 M M M
7/3/2010 7:15 AM 0.00 0.0 M M M
7/4/2010 7:15 AM 0.00 0.0 M M M
7/5/2010 7:15 AM 0.00 0.0 M M M
7/9/2010 7:15 AM 0.00 0.0 M M M
8/9/2010 7:15 AM 0.00 0.0 M M M High level fog clouds



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
2/14/2010 2/16/2010 7:00 AM 3 0.00 M M
2/18/2010 2/23/2010 7:15 AM 6 0.25 M M
3/19/2010 3/21/2010 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