Station Overview Station Location
Station Number CA-MA-8 Latitude 37.116
Station Name Chowchilla 0.3 E Longitude -120.252
County Madera Elevation (ft) 238



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 17 0.74 0.15 1 0.15 1 0.00 0 0 1 0 0.0 0 0
Nov 17 1.32 0.35 30 0.35 30 0.00 0 0 3 1 0.0 0 0
Dec 17 2.00 0.09 31 0.09 31 0.00 0 0 1 1 0.0 0 0
Jan 18 2.50 1.75 31 1.75 31 0.00 0 0 9 0 0.0 0 0
Feb 18 2.26 0.38 28 0.38 28 0.00 0 0 1 2 0.0 0 0
March 18 2.15 4.51 31 4.51 31 0.00 0 0 13 1 0.0 0 0
April 18 1.01 0.94 30 0.94 30 0.00 0 0 5 1 0.0 0 0
May 18 0.47 0.00 31 0.00 31 0.00 0 0 0 0 0.0 0 0
June 18 0.12 0.00 30 0.00 30 0.00 0 0 0 0 0.0 0 0
July 18 0.01 0.00 31 0.00 31 0.00 0 0 0 0 0.0 0 0
Aug 18 0.02 0.00 31 0.00 31 0.00 0 0 0 0 0.0 0 0
Sept 18 0.17 0.00 30 0.00 30 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 12.77" 8.17" 335 days 8.17" 335 0.00" 0 days 0 33 days 6 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
10/1/2017
10/2/2017
10/3/2017
10/4/2017
10/5/2017
10/6/2017
10/7/2017
10/8/2017
10/9/2017
10/10/2017
10/11/2017
10/12/2017
10/13/2017
10/14/2017
10/15/2017
10/16/2017
10/17/2017
10/18/2017
10/19/2017
10/20/2017 0.15
10/21/2017
10/22/2017
10/23/2017
10/24/2017
10/25/2017
10/26/2017
10/27/2017
10/28/2017
10/29/2017
10/30/2017
10/31/2017
11/1/2017 0.00
11/2/2017 0.00
11/3/2017 0.00
11/4/2017 0.02
11/5/2017 T
11/6/2017 0.00
11/7/2017 0.00
11/8/2017 0.00
11/9/2017 0.00
11/10/2017 0.00
11/11/2017 0.00
11/12/2017 0.00
11/13/2017 0.00
11/14/2017 0.00
11/15/2017 0.00
11/16/2017 0.00
11/17/2017 0.19
11/18/2017 0.00
11/19/2017 0.00
11/20/2017 0.00
11/21/2017 0.00
11/22/2017 0.00
11/23/2017 0.00
11/24/2017 0.00
11/25/2017 0.00
11/26/2017 0.00
11/27/2017 0.14
11/28/2017 0.00
11/29/2017 0.00
11/30/2017 0.00
12/1/2017 0.00
12/2/2017 0.00
12/3/2017 T
12/4/2017 0.00
12/5/2017 0.00
12/6/2017 0.00
12/7/2017 0.00
12/8/2017 0.00
12/9/2017 0.00
12/10/2017 0.00
12/11/2017 0.00
12/12/2017 0.00
12/13/2017 0.00
12/14/2017 0.00
12/15/2017 0.00
12/16/2017 0.00
12/17/2017 0.00
12/18/2017 0.00
12/19/2017 0.00
12/20/2017 0.00
12/21/2017 0.09
12/22/2017 0.00
12/23/2017 0.00
12/24/2017 0.00
12/25/2017 0.00
12/26/2017 0.00
12/27/2017 0.00
12/28/2017 0.00
12/29/2017 0.00
12/30/2017 0.00
12/31/2017 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2018 0.00
1/2/2018 0.00
1/3/2018 0.00
1/4/2018 0.06
1/5/2018 0.00
1/6/2018 0.02
1/7/2018 0.05
1/8/2018 0.12
1/9/2018 0.50
1/10/2018 0.57
1/11/2018 0.00
1/12/2018 0.00
1/13/2018 0.00
1/14/2018 0.00
1/15/2018 0.00
1/16/2018 0.00
1/17/2018 0.00
1/18/2018 0.00
1/19/2018 0.13
1/20/2018 0.00
1/21/2018 0.00
1/22/2018 0.00
1/23/2018 0.01
1/24/2018 0.00
1/25/2018 0.29
1/26/2018 0.00
1/27/2018 0.00
1/28/2018 0.00
1/29/2018 0.00
1/30/2018 0.00
1/31/2018 0.00
2/1/2018 0.00
2/2/2018 0.00
2/3/2018 0.00
2/4/2018 0.00
2/5/2018 0.00
2/6/2018 0.00
2/7/2018 0.00
2/8/2018 0.00
2/9/2018 0.00
2/10/2018 0.00
2/11/2018 0.00
2/12/2018 0.00
2/13/2018 0.00
2/14/2018 0.00
2/15/2018 0.00
2/16/2018 0.00
2/17/2018 0.00
2/18/2018 0.00
2/19/2018 T
2/20/2018 0.00
2/21/2018 0.00
2/22/2018 0.00
2/23/2018 T
2/24/2018 0.00
2/25/2018 0.00
2/26/2018 0.00
2/27/2018 0.38
2/28/2018 0.00
3/1/2018 0.11
3/2/2018 1.16
3/3/2018 0.40
3/4/2018 0.05
3/5/2018 0.00
3/6/2018 0.00
3/7/2018 0.00
3/8/2018 0.00
3/9/2018 0.00
3/10/2018 0.00
3/11/2018 T
3/12/2018 0.00
3/13/2018 0.10
3/14/2018 0.85
3/15/2018 0.01
3/16/2018 0.03
3/17/2018 0.01
3/18/2018 0.00
3/19/2018 0.00
3/20/2018 0.00
3/21/2018 0.40
3/22/2018 0.87
3/23/2018 0.45
3/24/2018 0.00
3/25/2018 0.07
3/26/2018 0.00
3/27/2018 0.00
3/28/2018 0.00
3/29/2018 0.00
3/30/2018 0.00
3/31/2018 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2018 0.00
4/2/2018 0.00
4/3/2018 0.00
4/4/2018 0.00
4/5/2018 0.00
4/6/2018 T
4/7/2018 0.38
4/8/2018 0.26
4/9/2018 0.00
4/10/2018 0.00
4/11/2018 0.00
4/12/2018 0.02
4/13/2018 0.00
4/14/2018 0.00
4/15/2018 0.00
4/16/2018 0.02
4/17/2018 0.26
4/18/2018 0.00
4/19/2018 0.00
4/20/2018 0.00
4/21/2018 0.00
4/22/2018 0.00
4/23/2018 0.00
4/24/2018 0.00
4/25/2018 0.00
4/26/2018 0.00
4/27/2018 0.00
4/28/2018 0.00
4/29/2018 0.00
4/30/2018 0.00
5/1/2018 0.00
5/2/2018 0.00
5/3/2018 0.00
5/4/2018 0.00
5/5/2018 0.00
5/6/2018 0.00
5/7/2018 0.00
5/8/2018 0.00
5/9/2018 0.00
5/10/2018 0.00
5/11/2018 0.00
5/12/2018 0.00
5/13/2018 0.00
5/14/2018 0.00
5/15/2018 0.00
5/16/2018 0.00
5/17/2018 0.00
5/18/2018 0.00
5/19/2018 0.00
5/20/2018 0.00
5/21/2018 0.00
5/22/2018 0.00
5/23/2018 0.00
5/24/2018 0.00
5/25/2018 0.00
5/26/2018 0.00
5/27/2018 0.00
5/28/2018 0.00
5/29/2018 0.00
5/30/2018 0.00
5/31/2018 0.00
6/1/2018 0.00
6/2/2018 0.00
6/3/2018 0.00
6/4/2018 0.00
6/5/2018 0.00
6/6/2018 0.00
6/7/2018 0.00
6/8/2018 0.00
6/9/2018 0.00
6/10/2018 0.00
6/11/2018 0.00
6/12/2018 0.00
6/13/2018 0.00
6/14/2018 0.00
6/15/2018 0.00
6/16/2018 0.00
6/17/2018 0.00
6/18/2018 0.00
6/19/2018 0.00
6/20/2018 0.00
6/21/2018 0.00
6/22/2018 0.00
6/23/2018 0.00
6/24/2018 0.00
6/25/2018 0.00
6/26/2018 0.00
6/27/2018 0.00
6/28/2018 0.00
6/29/2018 0.00
6/30/2018 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2018 0.00
7/2/2018 0.00
7/3/2018 0.00
7/4/2018 0.00
7/5/2018 0.00
7/6/2018 0.00
7/7/2018 0.00
7/8/2018 0.00
7/9/2018 0.00
7/10/2018 0.00
7/11/2018 0.00
7/12/2018 0.00
7/13/2018 0.00
7/14/2018 0.00
7/15/2018 0.00
7/16/2018 0.00
7/17/2018 0.00
7/18/2018 0.00
7/19/2018 0.00
7/20/2018 0.00
7/21/2018 0.00
7/22/2018 0.00
7/23/2018 0.00
7/24/2018 0.00
7/25/2018 0.00
7/26/2018 0.00
7/27/2018 0.00
7/28/2018 0.00
7/29/2018 0.00
7/30/2018 0.00
7/31/2018 0.00
8/1/2018 0.00
8/2/2018 0.00
8/3/2018 0.00
8/4/2018 0.00
8/5/2018 0.00
8/6/2018 0.00
8/7/2018 0.00
8/8/2018 0.00
8/9/2018 0.00
8/10/2018 0.00
8/11/2018 0.00
8/12/2018 0.00
8/13/2018 0.00
8/14/2018 0.00
8/15/2018 0.00
8/16/2018 0.00
8/17/2018 0.00
8/18/2018 0.00
8/19/2018 0.00
8/20/2018 0.00
8/21/2018 0.00
8/22/2018 0.00
8/23/2018 0.00
8/24/2018 0.00
8/25/2018 0.00
8/26/2018 0.00
8/27/2018 0.00
8/28/2018 0.00
8/29/2018 0.00
8/30/2018 0.00
8/31/2018 0.00
9/1/2018 0.00
9/2/2018 0.00
9/3/2018 0.00
9/4/2018 0.00
9/5/2018 0.00
9/6/2018 0.00
9/7/2018 0.00
9/8/2018 0.00
9/9/2018 0.00
9/10/2018 0.00
9/11/2018 0.00
9/12/2018 0.00
9/13/2018 0.00
9/14/2018 0.00
9/15/2018 0.00
9/16/2018 0.00
9/17/2018 0.00
9/18/2018 0.00
9/19/2018 0.00
9/20/2018 0.00
9/21/2018 0.00
9/22/2018 0.00
9/23/2018 0.00
9/24/2018 0.00
9/25/2018 0.00
9/26/2018 0.00
9/27/2018 0.00
9/28/2018 0.00
9/29/2018 0.00
9/30/2018 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/20/2017 7:00 AM 0.15 M M M M A dry warm-frontal passage occurred mid-afternoon Thursday the 19th marked by light wind direction shifts and scattered alto-cumulus and cirrus. The mid-latitude wave cold-front slowly moved SE from the Gulf of Alaska over Central California bringing early season light rain to the North and Central San Joaquin Valley in the pre-dawn hours of Friday the 20th. Rain amounts tapered off significantly south of Madera to generally just a few hundredths in the South-Central Valley with post-frontal northwest wind in the S.J.Valley.
11/1/2017 8:00 AM 0.00 0.0 M M M
11/2/2017 8:00 AM 0.00 0.0 M M M
11/3/2017 8:00 AM 0.00 0.0 M M M
11/4/2017 7:00 AM 0.02 M M M M A few sprinkles were noted during the late afternoon hours of Friday the 3rd with the approach of a cold-front with very light rain and 0.02" amount occurring between 6 to 8 PM PDT. Trace amounts occurred intermittently through the night.
11/5/2017 7:00 AM T M M M M Very light and intermittent rain showers developed late in the afternoon and early evening of the 4th with no appreciable accumulation of rain amounts.
11/6/2017 8:00 AM 0.00 0.0 M M M
11/7/2017 8:00 AM 0.00 0.0 M M M
11/8/2017 8:00 AM 0.00 0.0 M M M
11/9/2017 8:00 AM 0.00 0.0 M M M
11/10/2017 8:00 AM 0.00 0.0 M M M
11/11/2017 8:00 AM 0.00 0.0 M M M
11/12/2017 8:00 AM 0.00 0.0 M M M
11/13/2017 8:00 AM 0.00 0.0 M M M
11/14/2017 8:00 AM 0.00 0.0 M M M
11/15/2017 8:00 AM 0.00 0.0 M M M
11/16/2017 8:00 AM 0.00 0.0 M M M
11/17/2017 7:00 AM 0.19 M M M M A moderate cold-front passed the station in the hours just after midnight early Friday morning the 17th with a definitive backside to the cold-front just after dawn. Intermittent sprinkles occurred 3:15 to 5:00 PM PST Thursday afternoon.
11/18/2017 8:00 AM 0.00 0.0 M M M
11/19/2017 8:00 AM 0.00 0.0 M M M
11/20/2017 8:00 AM 0.00 0.0 M M M
11/21/2017 8:00 AM 0.00 0.0 M M M
11/22/2017 8:00 AM 0.00 0.0 M M M
11/23/2017 8:00 AM 0.00 0.0 M M M
11/24/2017 8:00 AM 0.00 0.0 M M M
11/25/2017 8:00 AM 0.00 0.0 M M M
11/26/2017 8:00 AM 0.00 0.0 M M M
11/27/2017 7:00 AM 0.14 M M M M A weakening cold-front swept through Central California overnight and bringing precipitation to the station in the hours just after midnight. Sunday the 26th was mild in the warm sector of the mid-latitude wave with only a few sprinkles in the early evening hours before the rain with the cold FROPA.
11/28/2017 8:00 AM 0.00 0.0 M M M
11/29/2017 8:00 AM 0.00 0.0 M M M
11/30/2017 8:00 AM 0.00 0.0 M M M
12/1/2017 8:00 AM 0.00 0.0 M M M
12/2/2017 8:00 AM 0.00 0.0 M M M
12/3/2017 7:00 AM T M M M M A very weak cold-front pushed the station in the our just before dawn with only a few sprinkles / Trace of rain to mark its passage. Quick clearing behind the front occurred with lowering temperatures and drier air for a subsequent frost event.
12/4/2017 5:00 AM 0.00 0.0 M M M Following just a Trace of rain at frontal passage earlier in the morning of Sunday the 3rd...strong high pressure built into the Pacific Northwest. Flow aloft turned northeasterly quickly but much colder air with lowered dew points were pushed into the San Joaquin Valley Air Basin.
12/5/2017 8:00 AM 0.00 0.0 M M M
12/6/2017 8:00 AM 0.00 0.0 M M M
12/7/2017 8:00 AM 0.00 0.0 M M M
12/8/2017 8:00 AM 0.00 0.0 M M M
12/9/2017 8:00 AM 0.00 0.0 M M M
12/10/2017 8:00 AM 0.00 0.0 M M M
12/11/2017 8:00 AM 0.00 0.0 M M M
12/12/2017 8:00 AM 0.00 0.0 M M M
12/13/2017 8:00 AM 0.00 0.0 M M M
12/14/2017 8:00 AM 0.00 0.0 M M M
12/15/2017 8:00 AM 0.00 0.0 M M M
12/16/2017 8:00 AM 0.00 0.0 M M M
12/17/2017 8:00 AM 0.00 0.0 M M M
12/18/2017 8:00 AM 0.00 0.0 M M M
12/19/2017 8:00 AM 0.00 0.0 M M M
12/20/2017 8:00 AM 0.00 0.0 M M M
12/21/2017 6:00 AM 0.09 M M M M An intense cold-front defined by much colder air behind the front swept over the observation site in the hours immediately after dawn on Wednesday the 20th. Precipitation lasted just under 3 hours as light rain. Daytime highs only reached around 50F but dew points held to around 30F overnight the 20th.
12/22/2017 8:00 AM 0.00 0.0 M M M
12/23/2017 8:00 AM 0.00 0.0 M M M
12/24/2017 8:00 AM 0.00 0.0 M M M
12/25/2017 8:00 AM 0.00 0.0 M M M
12/26/2017 8:00 AM 0.00 0.0 M M M
12/27/2017 8:00 AM 0.00 0.0 M M M
12/28/2017 8:00 AM 0.00 0.0 M M M
12/29/2017 8:00 AM 0.00 0.0 M M M
12/30/2017 8:00 AM 0.00 0.0 M M M
12/31/2017 8:00 AM 0.00 0.0 M M M
1/1/2018 8:00 AM 0.00 0.0 M M M
1/2/2018 8:00 AM 0.00 0.0 M M M
1/3/2018 8:00 AM 0.00 0.0 M M M
1/4/2018 7:00 AM 0.06 M M M M Zonal flow brought warm frontal passage and 0.01” from 5:08 to 5:24 PM Wednesday the 3rd with rain beginning again after midnight and another 0.05” before ending around 5:00 AM.
1/5/2018 7:00 AM 0.00 0.0 M M M
1/6/2018 7:00 AM 0.02 0.0 M M M Very light rain occurred in the pre-dawn hours of Saturday the 6th.
1/7/2018 7:00 AM 0.05 M M M M A Trace of rain fell circa 1100PST-1230PST on Saturday the 6th with measurable rain in the hour around dawn on Sunday the 7th.
1/8/2018 7:00 AM 0.12 M M M M Relatively mild zonal flow continues to stream periodic disturbances across Central California at approximate 24-hour intervals. Rain began more in earnest this morning compared to the last 4 days as a more substantial trof moved closer to Central California.
1/9/2018 7:00 AM 0.50 M M M M Rain became moderate around midnight and continued though observation time.
1/10/2018 7:00 AM 0.57 M M M M Moderate rain continued until the late morning on the Tuesday the 9th and then turned to showers through the rest of the obs period. The rain episode ended with post-frontal showers tapering off by observation time on Wednesday the 10th.
1/11/2018 8:00 AM 0.00 0.0 M M M
1/12/2018 8:00 AM 0.00 0.0 M M M
1/13/2018 8:00 AM 0.00 0.0 M M M
1/14/2018 8:00 AM 0.00 0.0 M M M
1/15/2018 8:00 AM 0.00 0.0 M M M
1/16/2018 8:00 AM 0.00 0.0 M M M
1/17/2018 8:00 AM 0.00 0.0 M M M
1/18/2018 8:00 AM 0.00 0.0 M M M
1/19/2018 7:00 AM 0.13 M M M M Cold-frontal passage occurred in the middle of the night with rain at the station beginning just after midnight. The heaviest rate of rain was between 1:00AM to 3:00AM PST but post-frontal showers lingered and stopped just before observation time.
1/20/2018 8:00 AM 0.00 0.0 M M M
1/21/2018 8:00 AM 0.00 0.0 M M M
1/22/2018 8:00 AM 0.00 0.0 M M M
1/23/2018 7:00 AM 0.01 0.0 M M M A dissipating cold-front stalled in its southeast progression over Chowchilla during the mid-morning hours of Monday the 22nd. Very light showers occurred between 0800-0930PST accumulating to just 0.01". Skies cleared to hazy afternoon sunshine late in the day. The morning of Tuesday the 23rd saw widespread low overcast with local areas of dense fog around the station.
1/24/2018 7:00 AM 0.00 0.0 M M M Widespread dense fog developed by midnight at the station.
1/25/2018 7:00 AM 0.29 M M M M A weakening frontal passage through Central California occurred in the hours just after midnight the morning of Thursday the 25th.
1/26/2018 7:00 AM 0.00 0.0 M M M Following the very early morning frontal passage through the observation area Thursday the 25th, the afternoon hours saw some low-topped convection coming off the Diablo Mountains west of the obs site before dissipating by mid-evening.
1/27/2018 8:00 AM 0.00 0.0 M M M
1/28/2018 8:00 AM 0.00 0.0 M M M
1/29/2018 8:00 AM 0.00 0.0 M M M
1/30/2018 8:00 AM 0.00 0.0 M M M
1/31/2018 8:00 AM 0.00 0.0 M M M
2/1/2018 8:00 AM 0.00 0.0 M M M
2/2/2018 8:00 AM 0.00 0.0 M M M
2/3/2018 8:00 AM 0.00 0.0 M M M
2/4/2018 8:00 AM 0.00 0.0 M M M
2/5/2018 8:00 AM 0.00 0.0 M M M
2/6/2018 8:00 AM 0.00 0.0 M M M
2/7/2018 8:00 AM 0.00 0.0 M M M
2/8/2018 8:00 AM 0.00 0.0 M M M
2/9/2018 8:00 AM 0.00 0.0 M M M
2/10/2018 8:00 AM 0.00 0.0 M M M
2/11/2018 8:00 AM 0.00 0.0 M M M
2/12/2018 8:00 AM 0.00 0.0 M M M
2/13/2018 8:00 AM 0.00 0.0 M M M
2/14/2018 8:00 AM 0.00 0.0 M M M
2/15/2018 8:00 AM 0.00 0.0 M M M
2/16/2018 8:00 AM 0.00 0.0 M M M
2/17/2018 8:00 AM 0.00 0.0 M M M
2/18/2018 8:00 AM 0.00 0.0 M M M
2/19/2018 7:00 AM T 0.0 M M M Meridianal flow plunged cold air southward over interior California as a Low Pressure center with a cold core at -36C approached aloft. The associated Cold-Front was essentially dry with only a few sprinkles at the surface as it passed just before dawn Monday Morning (the 19th). Frigid air at the surface with high temps only 50-52F and dewpoints 17-20F followed the FROPA.
2/20/2018 7:00 AM 0.00 0.0 M M M Post-frontal northwest winds diminished Monday evening the 19th keeping temps from plunging even as dewpoints were 17-20F. But wind-sheltered areas crossed 32F as early as 10PM PST. Overnight minimums for this Tuesday morning the 20th dropped to 23-26F over the area with 19-21F reported at coldest locations. Huge deciduous tree nut and fruit crop damage.
2/21/2018 7:00 AM 0.00 0.0 M M M A second night of clear skies and with minimal wind mixing temp falls after sunset led to longer durations of damaging freeze. Afternoon dewpoints Tuesday afternoon were still in the upper teens F. Overnight minimums Wed morning the 21st were again in the 23-26F range with coldest pockets hitting 19-21F.
2/22/2018 7:00 AM 0.00 0.0 M M M Cloud cover moved to the station just before dawn on Thursday the 22nd halting temp falls around the immediate area around 30F rather than potential upper 20s. This morning was the last of three sub-32F mornings.
2/23/2018 7:00 AM T M M M M Thursday afternoon the 22nd saw a slow-moving cold and mostly dry cold-front sweep through Central California. However, less clouds and sun on the surface led to low-topped convection with glaciation and only a few sprinkles at the obs site in the very cold post-front airmass. Snow levels in the adjacent mountains were down to 1500 feet MSL.
2/24/2018 7:00 AM 0.00 0.0 M M M Cold air advection following Thursday, the 22nd, afternoon frontal passage along with dewpoints in the upper teens-20F led to another morning of freeze/frost for the area on deciduous crops. Minimum temps were in the 25-27F range in colder areas with 32F crossed around 1AM PST and below 30F for 3-4 hrs. Evening wind mixing kept temps moderated thereby minimizing durations below 32F.
2/25/2018 8:00 AM 0.00 0.0 M M M
2/26/2018 8:00 AM 0.00 0.0 M M M
2/27/2018 7:00 AM 0.38 M M M M A moist 19 hour period as rain began Monday the 26th at mid-day with the most consistent rain to mid-afternoon. Low clouds with intermittent light showers then occurred through the remainder of the evening and overnight ending just before obs time.
2/28/2018 7:00 AM 0.00 0.0 M M M
3/1/2018 7:00 AM 0.11 M M M M An upper air low pressure center with 500mb Temps around -36C set-up offshore of Washington State and swung the first of several fronts into Central California in the wee hours of Thursday, March 1st. Rain began at 2:00AM PST at the station and continued through obs time.
3/2/2018 7:00 AM 1.16 M M M M Rain showers continued through the previous 24-hr obs time period with 0.25" falling from 0700-1730PST. Steady moderate rain occurred from 1730-2345PST Thursday evening with an additional 0.74" for a calendar day total of 1.10". Rain began again at 3:00AM and continued through the Friday morning obs time with another 0.17" in that time period.
3/3/2018 7:00 AM 0.40 M M M M Light rain showers continued through the morning hours on Friday the 2nd accumulating 0.09" by 1400PST. Afternoon hours with locally heavy rain showers brought approximately 0.15" with another light shower period overnight between 2300-0500PST accumulating another 0.16". Low-topped convection due to instability associated with an upper low off the Oregon Coast is feeding bands of instability in southwest flow aloft providing these periods of showers for the San Joaquin Valley as well as on-going up-slope precipitation for the adjacent Southern Sierra Nevada Mountains.
3/4/2018 7:00 AM 0.05 M M M M Low-topped convection around the observation site developed by mid-afternoon Saturday the 3rd with intermittent brief showers adding a few hundredths of an inch to the storm total. Showers tapered off and skies cleared overnight.
3/5/2018 8:00 AM 0.00 0.0 M M M
3/6/2018 8:00 AM 0.00 0.0 M M M
3/7/2018 8:00 AM 0.00 0.0 M M M
3/8/2018 8:00 AM 0.00 0.0 M M M
3/9/2018 8:00 AM 0.00 0.0 M M M
3/10/2018 8:00 AM 0.00 0.0 M M M
3/11/2018 7:00 AM T M M M M Warm, over-running cloudiness spread over Central California and points south with rain primarily south of the station through Saturday afternoon the 10th. Only a few light sprinkles occurred from this over-running in the evening hours.
3/12/2018 8:00 AM 0.00 0.0 M M M
3/13/2018 7:00 AM 0.10 M M M M Over-running cloudiness resulted in light rain falling at the station the evening of Monday the 12th into the early morning hours of the 13th for an accumulation of 0.10".
3/14/2018 7:00 AM 0.85 M M M M 0.40” 0730-1030 PST on the 13th ... 0.45” 2300-0200 PST the 14th.
3/15/2018 7:00 AM 0.01 M M M M Instability led to convective-type rain showers around the region mid-day through the afternoon of Wednesday the 14th. The station received just a few sprinkles at times with one shower accumulating 0.01" around mid-day.
3/16/2018 7:00 AM 0.03 M M M M Bands of showers continue to rotate northeastward into Central California. A shower occurred just before dawn on Friday the 16th.
3/17/2018 7:00 AM 0.01 M M M M A few very light afternoon showers during the afternoon of Friday the 16th accumulated only 0.01" of additional rain in post-frontal convective activity.
3/18/2018 8:00 AM 0.00 0.0 M M M
3/19/2018 8:00 AM 0.00 0.0 M M M
3/20/2018 8:00 AM 0.00 0.0 M M M
3/21/2018 7:00 AM 0.40 M M M M Rain began Tuesday the 20th at 1115PDT from a moist southwest sub-tropical flow aloft. Rain was moderate during the evening hours and ended by 0400PDT. However, moderate rain began at 0630PDT this morning...Wednesday the 21st continuing through obs time.
3/22/2018 7:00 AM 0.87 M M M M Rain throughout the 24-hr observation period ending at 7:00 AM PDT Thursday morning the 22nd.
3/23/2018 7:00 AM 0.45 M M M M Rain continued Thursday morning the 22nd until 9:00AM with 0.09" additional precip accumulation. Low-topped vigorous convection brought afternoon showers around the area with a very vigorous squall line, heavy rain, and thunder passing the station in the 4:30 to 5:15 PM PDT time period with an additional 0.36" of rain.
3/24/2018 7:00 AM 0.00 0.0 M M M
3/25/2018 7:00 AM 0.07 M M M M Afternoon instability created widely scattered rain showers around the Central San Joaquin Valley Saturday the 24th. A rain shower at the observation sited very late afternoon to sunset brought a few hundredths of an inch.
3/26/2018 8:00 AM 0.00 0.0 M M M
3/27/2018 8:00 AM 0.00 0.0 M M M
3/28/2018 8:00 AM 0.00 0.0 M M M
3/29/2018 8:00 AM 0.00 0.0 M M M
3/30/2018 8:00 AM 0.00 0.0 M M M
3/31/2018 8:00 AM 0.00 0.0 M M M
4/1/2018 8:00 AM 0.00 0.0 M M M
4/2/2018 8:00 AM 0.00 0.0 M M M
4/3/2018 8:00 AM 0.00 0.0 M M M
4/4/2018 8:00 AM 0.00 0.0 M M M
4/5/2018 8:00 AM 0.00 0.0 M M M
4/6/2018 6:00 AM T M M M M Rain began just before this early morning observation time.
4/7/2018 7:00 AM 0.38 M M M M In the obs period there was 0.13” from 0600LT to 0800LT on Friday the 6th and then warm-overrunning maintained cloud cover and occasional very light showers through the day and into the evening. Rain in the very early morning hours through obs time brought an additional 0.25”.
4/8/2018 7:00 AM 0.26 M M M M Frontal passage occurred around 0900LT Saturday the 7th with rain tapering off by 1000LT. Post-frontal cloudiness with a few showers in the area occurred until mid-afternoon. Storm total 0.64".
4/9/2018 8:00 AM 0.00 0.0 M M M
4/10/2018 8:00 AM 0.00 0.0 M M M
4/11/2018 8:00 AM 0.00 0.0 M M M
4/12/2018 7:00 AM 0.02 M M M M Rain showers occurred just after midnight for a couple of hours early the morning of Thursday the 12th.
4/13/2018 8:00 AM 0.00 0.0 M M M
4/14/2018 8:00 AM 0.00 0.0 M M M
4/15/2018 8:00 AM 0.00 0.0 M M M
4/16/2018 7:00 AM 0.02 M M M M A light rain shower occurred before dawn on Monday the 16th.
4/17/2018 7:00 AM 0.26 M M M M A cold-core upper low settled southeastward from the San Francisco Bay Area Monday the 16th and brought vigorous convective activity during the afternoon and evening. Small hail and thunder occurred around 4:20 PM PDT with numerous and locally moderate to heavy rain showers between Noon and 6 PM bringing 0.25" of rain. Another brief shower occurred just after midnight adding another 0.01" before a clear dawn. Ground fog developed at sunrise and led to a deeper radiational fog that lasted until 9:00 AM.
4/18/2018 8:00 AM 0.00 0.0 M M M
4/19/2018 8:00 AM 0.00 0.0 M M M
4/20/2018 8:00 AM 0.00 0.0 M M M
4/21/2018 8:00 AM 0.00 0.0 M M M
4/22/2018 8:00 AM 0.00 0.0 M M M
4/23/2018 8:00 AM 0.00 0.0 M M M
4/24/2018 8:00 AM 0.00 0.0 M M M
4/25/2018 8:00 AM 0.00 0.0 M M M
4/26/2018 8:00 AM 0.00 0.0 M M M
4/27/2018 8:00 AM 0.00 0.0 M M M
4/28/2018 8:00 AM 0.00 0.0 M M M
4/29/2018 8:00 AM 0.00 0.0 M M M
4/30/2018 8:00 AM 0.00 0.0 M M M
5/1/2018 8:00 AM 0.00 0.0 M M M
5/2/2018 8:00 AM 0.00 0.0 M M M
5/3/2018 8:00 AM 0.00 0.0 M M M
5/4/2018 8:00 AM 0.00 0.0 M M M
5/5/2018 8:00 AM 0.00 0.0 M M M
5/6/2018 8:00 AM 0.00 0.0 M M M
5/7/2018 8:00 AM 0.00 0.0 M M M
5/8/2018 8:00 AM 0.00 0.0 M M M
5/9/2018 8:00 AM 0.00 0.0 M M M
5/10/2018 8:00 AM 0.00 0.0 M M M
5/11/2018 8:00 AM 0.00 0.0 M M M
5/12/2018 8:00 AM 0.00 0.0 M M M
5/13/2018 8:00 AM 0.00 0.0 M M M
5/14/2018 8:00 AM 0.00 0.0 M M M
5/15/2018 8:00 AM 0.00 0.0 M M M
5/16/2018 8:00 AM 0.00 0.0 M M M
5/17/2018 8:00 AM 0.00 0.0 M M M
5/18/2018 8:00 AM 0.00 0.0 M M M
5/19/2018 8:00 AM 0.00 0.0 M M M
5/20/2018 8:00 AM 0.00 0.0 M M M
5/21/2018 8:00 AM 0.00 0.0 M M M
5/22/2018 8:00 AM 0.00 0.0 M M M
5/23/2018 8:00 AM 0.00 0.0 M M M
5/24/2018 8:00 AM 0.00 0.0 M M M
5/25/2018 8:00 AM 0.00 0.0 M M M
5/26/2018 8:00 AM 0.00 0.0 M M M
5/27/2018 8:00 AM 0.00 0.0 M M M
5/28/2018 8:00 AM 0.00 0.0 M M M
5/29/2018 8:00 AM 0.00 0.0 M M M
5/30/2018 8:00 AM 0.00 0.0 M M M
5/31/2018 8:00 AM 0.00 0.0 M M M
6/1/2018 8:00 AM 0.00 0.0 M M M
6/2/2018 8:00 AM 0.00 0.0 M M M
6/3/2018 8:00 AM 0.00 0.0 M M M
6/4/2018 8:00 AM 0.00 0.0 M M M
6/5/2018 8:00 AM 0.00 0.0 M M M
6/6/2018 8:00 AM 0.00 0.0 M M M
6/7/2018 8:00 AM 0.00 0.0 M M M
6/8/2018 8:00 AM 0.00 0.0 M M M
6/9/2018 8:00 AM 0.00 0.0 M M M
6/10/2018 8:00 AM 0.00 0.0 M M M
6/11/2018 8:00 AM 0.00 0.0 M M M
6/12/2018 8:00 AM 0.00 0.0 M M M
6/13/2018 8:00 AM 0.00 0.0 M M M
6/14/2018 8:00 AM 0.00 0.0 M M M
6/15/2018 8:00 AM 0.00 0.0 M M M
6/16/2018 8:00 AM 0.00 0.0 M M M
6/17/2018 8:00 AM 0.00 0.0 M M M
6/18/2018 8:00 AM 0.00 0.0 M M M
6/19/2018 8:00 AM 0.00 0.0 M M M
6/20/2018 8:00 AM 0.00 0.0 M M M
6/21/2018 8:00 AM 0.00 0.0 M M M
6/22/2018 8:00 AM 0.00 0.0 M M M
6/23/2018 8:00 AM 0.00 0.0 M M M
6/24/2018 8:00 AM 0.00 0.0 M M M
6/25/2018 8:00 AM 0.00 0.0 M M M
6/26/2018 8:00 AM 0.00 0.0 M M M
6/27/2018 8:00 AM 0.00 0.0 M M M
6/28/2018 8:00 AM 0.00 0.0 M M M
6/29/2018 8:00 AM 0.00 0.0 M M M
6/30/2018 8:00 AM 0.00 0.0 M M M
7/1/2018 8:00 AM 0.00 0.0 M M M
7/2/2018 8:00 AM 0.00 0.0 M M M
7/3/2018 8:00 AM 0.00 0.0 M M M
7/4/2018 8:00 AM 0.00 0.0 M M M
7/5/2018 8:00 AM 0.00 0.0 M M M
7/6/2018 8:00 AM 0.00 0.0 M M M
7/7/2018 8:00 AM 0.00 0.0 M M M
7/8/2018 8:00 AM 0.00 0.0 M M M
7/9/2018 8:00 AM 0.00 0.0 M M M
7/10/2018 8:00 AM 0.00 0.0 M M M
7/11/2018 8:00 AM 0.00 0.0 M M M
7/12/2018 8:00 AM 0.00 0.0 M M M
7/13/2018 8:00 AM 0.00 0.0 M M M
7/14/2018 8:00 AM 0.00 0.0 M M M
7/15/2018 8:00 AM 0.00 0.0 M M M
7/16/2018 8:00 AM 0.00 0.0 M M M
7/17/2018 8:00 AM 0.00 0.0 M M M
7/18/2018 8:00 AM 0.00 0.0 M M M
7/19/2018 8:00 AM 0.00 0.0 M M M
7/20/2018 8:00 AM 0.00 0.0 M M M
7/21/2018 8:00 AM 0.00 0.0 M M M
7/22/2018 8:00 AM 0.00 0.0 M M M
7/23/2018 8:00 AM 0.00 0.0 M M M
7/24/2018 8:00 AM 0.00 0.0 M M M
7/25/2018 8:00 AM 0.00 0.0 M M M
7/26/2018 8:00 AM 0.00 0.0 M M M
7/27/2018 8:00 AM 0.00 0.0 M M M
7/28/2018 8:00 AM 0.00 0.0 M M M
7/29/2018 8:00 AM 0.00 0.0 M M M
7/30/2018 8:00 AM 0.00 0.0 M M M
7/31/2018 8:00 AM 0.00 0.0 M M M
8/1/2018 8:00 AM 0.00 0.0 M M M
8/2/2018 8:00 AM 0.00 0.0 M M M
8/3/2018 8:00 AM 0.00 0.0 M M M
8/4/2018 8:00 AM 0.00 0.0 M M M
8/5/2018 8:00 AM 0.00 0.0 M M M
8/6/2018 8:00 AM 0.00 0.0 M M M
8/7/2018 8:00 AM 0.00 0.0 M M M
8/8/2018 8:00 AM 0.00 0.0 M M M
8/9/2018 8:00 AM 0.00 0.0 M M M
8/10/2018 8:00 AM 0.00 0.0 M M M
8/11/2018 8:00 AM 0.00 0.0 M M M
8/12/2018 8:00 AM 0.00 0.0 M M M
8/13/2018 8:00 AM 0.00 0.0 M M M
8/14/2018 8:00 AM 0.00 0.0 M M M
8/15/2018 8:00 AM 0.00 0.0 M M M
8/16/2018 8:00 AM 0.00 0.0 M M M
8/17/2018 8:00 AM 0.00 0.0 M M M
8/18/2018 8:00 AM 0.00 0.0 M M M
8/19/2018 8:00 AM 0.00 0.0 M M M
8/20/2018 8:00 AM 0.00 0.0 M M M
8/21/2018 8:00 AM 0.00 0.0 M M M
8/22/2018 8:00 AM 0.00 0.0 M M M
8/23/2018 8:00 AM 0.00 0.0 M M M
8/24/2018 8:00 AM 0.00 0.0 M M M
8/25/2018 8:00 AM 0.00 0.0 M M M
8/26/2018 8:00 AM 0.00 0.0 M M M
8/27/2018 8:00 AM 0.00 0.0 M M M
8/28/2018 8:00 AM 0.00 0.0 M M M
8/29/2018 8:00 AM 0.00 0.0 M M M
8/30/2018 8:00 AM 0.00 0.0 M M M
8/31/2018 8:00 AM 0.00 0.0 M M M
9/1/2018 8:00 AM 0.00 0.0 M M M
9/2/2018 8:00 AM 0.00 0.0 M M M
9/3/2018 8:00 AM 0.00 0.0 M M M
9/4/2018 8:00 AM 0.00 0.0 M M M
9/5/2018 8:00 AM 0.00 0.0 M M M
9/6/2018 8:00 AM 0.00 0.0 M M M
9/7/2018 8:00 AM 0.00 0.0 M M M
9/8/2018 8:00 AM 0.00 0.0 M M M
9/9/2018 8:00 AM 0.00 0.0 M M M
9/10/2018 8:00 AM 0.00 0.0 M M M
9/11/2018 8:00 AM 0.00 0.0 M M M
9/12/2018 8:00 AM 0.00 0.0 M M M
9/13/2018 8:00 AM 0.00 0.0 M M M
9/14/2018 8:00 AM 0.00 0.0 M M M
9/15/2018 8:00 AM 0.00 0.0 M M M
9/16/2018 8:00 AM 0.00 0.0 M M M
9/17/2018 8:00 AM 0.00 0.0 M M M
9/18/2018 8:00 AM 0.00 0.0 M M M
9/19/2018 8:00 AM 0.00 0.0 M M M
9/20/2018 8:00 AM 0.00 0.0 M M M
9/21/2018 8:00 AM 0.00 0.0 M M M
9/22/2018 8:00 AM 0.00 0.0 M M M
9/23/2018 8:00 AM 0.00 0.0 M M M
9/24/2018 8:00 AM 0.00 0.0 M M M
9/25/2018 8:00 AM 0.00 0.0 M M M
9/26/2018 8:00 AM 0.00 0.0 M M M
9/27/2018 8:00 AM 0.00 0.0 M M M
9/28/2018 8:00 AM 0.00 0.0 M M M
9/29/2018 8:00 AM 0.00 0.0 M M M
9/30/2018 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



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