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 16 0.74 0.96 31 0.96 31 0.00 0 0 6 0 0.0 0 0
Nov 16 1.32 1.28 30 1.28 30 0.00 0 0 4 0 0.0 0 0
Dec 16 2.00 2.11 31 2.11 31 0.00 0 0 6 2 0.0 0 0
Jan 17 2.50 4.93 31 4.93 31 0.00 0 0 16 1 0.0 0 0
Feb 17 2.26 3.70 27 3.70 27 0.00 0 0 15 2 0.0 0 0
March 17 2.15 1.39 31 1.39 31 0.00 0 0 7 2 0.0 0 0
April 17 1.01 0.86 30 0.86 30 0.00 0 0 8 1 0.0 0 0
May 17 0.47 0.00 31 0.00 31 0.00 0 0 0 1 0.0 0 0
June 17 0.12 0.02 4 0.02 4 0.00 0 0 1 0 0.0 0 0
July 17 0.01 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 17 0.02 0.00 31 0.00 31 0.00 0 0 0 0 0.0 0 0
Sept 17 0.17 0.20 21 0.20 21 0.00 0 0 2 0 0.0 0 0
Water Year Totals: 12.77" 15.45" 298 days 15.45" 298 0.00" 0 days 0 65 days 9 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
10/1/2016 0.00
10/2/2016 0.00
10/3/2016 0.00
10/4/2016 0.00
10/5/2016 0.00
10/6/2016 0.00
10/7/2016 0.00
10/8/2016 0.00
10/9/2016 0.00
10/10/2016 0.00
10/11/2016 0.00
10/12/2016 0.00
10/13/2016 0.00
10/14/2016 0.00
10/15/2016 0.00
10/16/2016 0.04
10/17/2016 0.05
10/18/2016 0.00
10/19/2016 0.00
10/20/2016 0.00
10/21/2016 0.00
10/22/2016 0.00
10/23/2016 0.00
10/24/2016 0.00
10/25/2016 0.00
10/26/2016 0.00
10/27/2016 0.00
10/28/2016 0.60
10/29/2016 0.13
10/30/2016 0.01
10/31/2016 0.13
11/1/2016 0.01
11/2/2016 0.00
11/3/2016 0.00
11/4/2016 0.00
11/5/2016 0.00
11/6/2016 0.00
11/7/2016 0.00
11/8/2016 0.00
11/9/2016 0.00
11/10/2016 0.00
11/11/2016 0.00
11/12/2016 0.00
11/13/2016 0.00
11/14/2016 0.00
11/15/2016 0.00
11/16/2016 0.00
11/17/2016 0.00
11/18/2016 0.00
11/19/2016 0.00
11/20/2016 0.00
11/21/2016 0.59
11/22/2016 0.00
11/23/2016 0.03
11/24/2016 0.00
11/25/2016 0.00
11/26/2016 0.00
11/27/2016 0.65
11/28/2016 0.00
11/29/2016 0.00
11/30/2016 0.00
12/1/2016 0.00
12/2/2016 0.00
12/3/2016 0.00
12/4/2016 0.00
12/5/2016 0.00
12/6/2016 0.00
12/7/2016 0.00
12/8/2016 0.35
12/9/2016 T
12/10/2016 0.02
12/11/2016 0.36
12/12/2016 0.00
12/13/2016 0.00
12/14/2016 0.00
12/15/2016 0.01
12/16/2016 0.86
12/17/2016 0.00
12/18/2016 0.00
12/19/2016 0.00
12/20/2016 0.00
12/21/2016 0.00
12/22/2016 0.00
12/23/2016 0.00
12/24/2016 0.51
12/25/2016 0.00
12/26/2016 0.00
12/27/2016 0.00
12/28/2016 0.00
12/29/2016 0.00
12/30/2016 0.00
12/31/2016 T
Day of YearDaily PrcpMultiday Prcp
1/1/2017 0.14
1/2/2017 0.00
1/3/2017 T
1/4/2017 0.52
1/5/2017 0.20
1/6/2017 0.00
1/7/2017 0.20
1/8/2017 0.48
1/9/2017 0.42
1/10/2017 0.05
1/11/2017 0.46
1/12/2017 0.20
1/13/2017 0.54
1/14/2017 0.00
1/15/2017 0.00
1/16/2017 0.00
1/17/2017 0.00
1/18/2017 0.00
1/19/2017 0.52
1/20/2017 0.48
1/21/2017 0.11
1/22/2017 0.10
1/23/2017 0.45
1/24/2017 0.06
1/25/2017 0.00
1/26/2017 0.00
1/27/2017 0.00
1/28/2017 0.00
1/29/2017 0.00
1/30/2017 0.00
1/31/2017 0.00
2/1/2017 0.00
2/2/2017 0.08
2/3/2017 0.15
2/4/2017 0.31
2/5/2017 0.00
2/6/2017 0.11
2/7/2017 0.18
2/8/2017 0.12
2/9/2017 0.01
2/10/2017 0.55
2/11/2017 0.94
2/12/2017 T
2/13/2017 0.00
2/14/2017 0.00
2/15/2017 0.00
2/16/2017 0.07
2/17/2017 0.30
2/18/2017 0.21
2/19/2017
2/20/2017 0.53
2/21/2017 0.03
2/22/2017 0.11
2/23/2017 0.00
2/24/2017 0.00
2/25/2017 0.00
2/26/2017 0.00
2/27/2017 T
2/28/2017 0.00
3/1/2017 0.00
3/2/2017 0.00
3/3/2017 0.00
3/4/2017 0.00
3/5/2017 T
3/6/2017 0.20
3/7/2017 0.00
3/8/2017 0.00
3/9/2017 0.00
3/10/2017 0.00
3/11/2017 0.00
3/12/2017 0.00
3/13/2017 0.00
3/14/2017 0.00
3/15/2017 0.00
3/16/2017 0.00
3/17/2017 0.00
3/18/2017 0.00
3/19/2017 0.00
3/20/2017 0.00
3/21/2017 0.07
3/22/2017 0.73
3/23/2017 0.09
3/24/2017 0.00
3/25/2017 0.25
3/26/2017 0.00
3/27/2017 0.04
3/28/2017 0.00
3/29/2017 0.00
3/30/2017 T
3/31/2017 0.01
Day of YearDaily PrcpMultiday Prcp
4/1/2017 0.00
4/2/2017 0.00
4/3/2017 0.00
4/4/2017 0.00
4/5/2017 0.00
4/6/2017 0.00
4/7/2017 0.11
4/8/2017 0.09
4/9/2017 0.03
4/10/2017 0.00
4/11/2017 0.00
4/12/2017 T
4/13/2017 0.06
4/14/2017 0.10
4/15/2017 0.00
4/16/2017 0.00
4/17/2017 0.10
4/18/2017 0.11
4/19/2017 0.26
4/20/2017 0.00
4/21/2017 0.00
4/22/2017 0.00
4/23/2017 0.00
4/24/2017 0.00
4/25/2017 0.00
4/26/2017 0.00
4/27/2017 0.00
4/28/2017 0.00
4/29/2017 0.00
4/30/2017 0.00
5/1/2017 0.00
5/2/2017 0.00
5/3/2017 0.00
5/4/2017 0.00
5/5/2017 0.00
5/6/2017 0.00
5/7/2017 T
5/8/2017 0.00
5/9/2017 0.00
5/10/2017 0.00
5/11/2017 0.00
5/12/2017 0.00
5/13/2017 0.00
5/14/2017 0.00
5/15/2017 0.00
5/16/2017 0.00
5/17/2017 0.00
5/18/2017 0.00
5/19/2017 0.00
5/20/2017 0.00
5/21/2017 0.00
5/22/2017 0.00
5/23/2017 0.00
5/24/2017 0.00
5/25/2017 0.00
5/26/2017 0.00
5/27/2017 0.00
5/28/2017 0.00
5/29/2017 0.00
5/30/2017 0.00
5/31/2017 0.00
6/1/2017 0.02
6/2/2017 0.00
6/3/2017 0.00
6/4/2017 0.00
6/5/2017
6/6/2017
6/7/2017
6/8/2017
6/9/2017
6/10/2017
6/11/2017
6/12/2017
6/13/2017
6/14/2017
6/15/2017
6/16/2017
6/17/2017
6/18/2017
6/19/2017
6/20/2017
6/21/2017
6/22/2017
6/23/2017
6/24/2017
6/25/2017
6/26/2017
6/27/2017
6/28/2017
6/29/2017
6/30/2017
Day of YearDaily PrcpMultiday Prcp
7/1/2017
7/2/2017
7/3/2017
7/4/2017
7/5/2017
7/6/2017
7/7/2017
7/8/2017
7/9/2017
7/10/2017
7/11/2017
7/12/2017
7/13/2017
7/14/2017
7/15/2017
7/16/2017
7/17/2017
7/18/2017
7/19/2017
7/20/2017
7/21/2017
7/22/2017
7/23/2017
7/24/2017
7/25/2017
7/26/2017
7/27/2017
7/28/2017
7/29/2017
7/30/2017
7/31/2017
8/1/2017 0.00
8/2/2017 0.00
8/3/2017 0.00
8/4/2017 0.00
8/5/2017 0.00
8/6/2017 0.00
8/7/2017 0.00
8/8/2017 0.00
8/9/2017 0.00
8/10/2017 0.00
8/11/2017 0.00
8/12/2017 0.00
8/13/2017 0.00
8/14/2017 0.00
8/15/2017 0.00
8/16/2017 0.00
8/17/2017 0.00
8/18/2017 0.00
8/19/2017 0.00
8/20/2017 0.00
8/21/2017 0.00
8/22/2017 0.00
8/23/2017 0.00
8/24/2017 0.00
8/25/2017 0.00
8/26/2017 0.00
8/27/2017 0.00
8/28/2017 0.00
8/29/2017 0.00
8/30/2017 0.00
8/31/2017 0.00
9/1/2017 0.00
9/2/2017 0.00
9/3/2017 0.00
9/4/2017 0.00
9/5/2017 0.00
9/6/2017 0.00
9/7/2017 0.00
9/8/2017 0.00
9/9/2017 0.00
9/10/2017 0.00
9/11/2017 0.00
9/12/2017 0.11
9/13/2017 0.00
9/14/2017 0.00
9/15/2017 0.00
9/16/2017 0.00
9/17/2017 0.00
9/18/2017 0.00
9/19/2017 0.00
9/20/2017 0.00
9/21/2017 0.09
9/22/2017
9/23/2017
9/24/2017
9/25/2017
9/26/2017
9/27/2017
9/28/2017
9/29/2017
9/30/2017



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2016 8:00 AM 0.00 0.0 M M M
10/2/2016 8:00 AM 0.00 0.0 M M M
10/3/2016 8:00 AM 0.00 0.0 M M M
10/4/2016 8:00 AM 0.00 0.0 M M M
10/5/2016 8:00 AM 0.00 0.0 M M M
10/6/2016 8:00 AM 0.00 0.0 M M M
10/7/2016 8:00 AM 0.00 0.0 M M M
10/8/2016 8:00 AM 0.00 0.0 M M M
10/9/2016 8:00 AM 0.00 0.0 M M M
10/10/2016 8:00 AM 0.00 0.0 M M M
10/11/2016 8:00 AM 0.00 0.0 M M M
10/12/2016 8:00 AM 0.00 0.0 M M M
10/13/2016 8:00 AM 0.00 0.0 M M M
10/14/2016 8:00 AM 0.00 0.0 M M M
10/15/2016 8:00 AM 0.00 0.0 M M M
10/16/2016 8:00 AM 0.04 0.0 0.00 M M
10/17/2016 8:00 AM 0.05 0.0 0.00 M M
10/18/2016 8:00 AM 0.00 0.0 M M M
10/19/2016 8:00 AM 0.00 0.0 M M M
10/20/2016 8:00 AM 0.00 0.0 M M M
10/21/2016 8:00 AM 0.00 0.0 M M M
10/22/2016 8:00 AM 0.00 0.0 M M M
10/23/2016 8:00 AM 0.00 0.0 M M M
10/24/2016 8:00 AM 0.00 0.0 M M M
10/25/2016 8:00 AM 0.00 0.0 M M M
10/26/2016 8:00 AM 0.00 0.0 M M M
10/27/2016 8:00 AM 0.00 0.0 M M M
10/28/2016 8:00 AM 0.60 0.0 0.00 M M Rain began mid-afternoon Thursday the 27th and continued until just after dawn Friday the 28th.
10/29/2016 8:00 AM 0.13 M M M M
10/30/2016 8:00 AM 0.01 0.0 0.00 M M Very light rain began at the station around dawn and continuing intermittent through obs time from a relatively high ceiling.
10/31/2016 8:00 AM 0.13 0.0 0.00 M M A weak frontal passage brought only 0.02" in light rain from 1320 to 1430 PDT Sunday afternoon the 30th. However, post-frontal showers resulted in heavy rain from 1930 to 2030 PDT and an additional 0.11". Rain total over the last 4 days at the station 0.87".
11/1/2016 8:00 AM 0.01 0.0 0.00 M M Very light shower activity during the wee hours of the 1st brought just 0.01" of rain at the station.
11/2/2016 8:00 AM 0.00 0.0 M M M
11/3/2016 8:00 AM 0.00 0.0 M M M
11/4/2016 8:00 AM 0.00 0.0 M M M
11/5/2016 8:00 AM 0.00 0.0 M M M
11/6/2016 8:00 AM 0.00 0.0 M M M
11/7/2016 8:00 AM 0.00 0.0 M M M
11/8/2016 8:00 AM 0.00 0.0 M M M
11/9/2016 8:00 AM 0.00 0.0 M M M
11/10/2016 8:00 AM 0.00 0.0 M M M
11/11/2016 8:00 AM 0.00 0.0 M M M
11/12/2016 8:00 AM 0.00 0.0 M M M
11/13/2016 8:00 AM 0.00 0.0 M M M
11/14/2016 8:00 AM 0.00 0.0 M M M
11/15/2016 8:00 AM 0.00 0.0 M M M
11/16/2016 8:00 AM 0.00 0.0 M M M
11/17/2016 8:00 AM 0.00 0.0 M M M
11/18/2016 8:00 AM 0.00 0.0 M M M
11/19/2016 8:00 AM 0.00 0.0 M M M
11/20/2016 8:00 AM 0.00 0.0 0.00 M M
11/21/2016 8:00 AM 0.59 0.0 0.00 M M With cold-frontal passage beginning early afternoon on Sunday the 20th about 4/10ths of an inch of rain occurred with subsequent periods of post-frontal shower activity providing the remainder of total.
11/22/2016 8:00 AM 0.00 0.0 M M M
11/23/2016 8:00 AM 0.03 0.0 0.00 M M Very light rain began at 3:59am but rain intensified to a light around dawn ending before obs time from a weak cold-frontal passage.
11/24/2016 8:00 AM 0.00 0.0 M M M
11/25/2016 8:00 AM 0.00 0.0 M M M
11/26/2016 8:00 AM 0.00 0.0 M M M
11/27/2016 8:00 AM 0.65 0.0 0.00 M M Cold-frontal passage brought 0.25" of rain between 1237 and 1355 PST Saturday afternoon the 26th. Another slow-moving frontal boundary moved into the area in the evening continuing periods of shower activity overnight ending just before obs time Sunday morning the 27th and contributing another 0.40" of rain.
11/28/2016 8:00 AM 0.00 0.0 M M M
11/29/2016 8:00 AM 0.00 0.0 M M M
11/30/2016 8:00 AM 0.00 0.0 M M M
12/1/2016 8:00 AM 0.00 0.0 M M M
12/2/2016 8:00 AM 0.00 0.0 M M M
12/3/2016 8:00 AM 0.00 0.0 M M M
12/4/2016 8:00 AM 0.00 0.0 M M M
12/5/2016 8:00 AM 0.00 0.0 M M M
12/6/2016 8:00 AM 0.00 0.0 M M M
12/7/2016 8:00 AM 0.00 0.0 M M M
12/8/2016 8:00 AM 0.35 0.0 0.00 M M A weakened frontal system passed over the obs site overnight with a moist zonal flow bringing very light rain. rain continued through the obs time.
12/9/2016 8:00 AM T 0.0 0.00 M M
12/10/2016 8:00 AM 0.02 0.0 0.00 M M Rain began around dawn with a moist zonal flow continuing over Central California.
12/11/2016 8:00 AM 0.36 0.0 0.00 M M Rain showers on Saturday the 10th and ended around obs time on Sunday morning the 11th.
12/12/2016 8:00 AM 0.00 0.0 M M M
12/13/2016 8:00 AM 0.00 0.0 M M M
12/14/2016 8:00 AM 0.00 0.0 M M M
12/15/2016 8:00 AM 0.01 0.0 0.00 M M Light rain began at dawn in the warm sector of an approaching mid-latitude wave.
12/16/2016 7:00 AM 0.86 0.0 0.00 M M A dawn-to-dawn rain event with rain having begun Thursday morning the 15th with on oncoming warm-front and followed by heiavier rain during the evening of the 15h and early hours of the 16th with the cold-front. By 10 PM the 15th 0.54" had fallen. The total for the event was 0.87"( from the 14th and 15th.
12/17/2016 8:00 AM 0.00 0.0 M M M
12/18/2016 8:00 AM 0.00 0.0 M M M
12/19/2016 8:00 AM 0.00 0.0 M M M
12/20/2016 8:00 AM 0.00 0.0 M M M
12/21/2016 8:00 AM 0.00 0.0 M M M
12/22/2016 8:00 AM 0.00 0.0 M M M
12/23/2016 8:00 AM 0.00 0.0 M M M
12/24/2016 8:00 AM 0.51 0.0 0.00 M M A rainy day with very light rain starting just after observation time on Friday the 23rd and stopping from the cold-frontal passage in the early evening.
12/25/2016 8:00 AM 0.00 0.0 M M M
12/26/2016 8:00 AM 0.00 0.0 M M M
12/27/2016 8:00 AM 0.00 0.0 M M M
12/28/2016 8:00 AM 0.00 0.0 M M M
12/29/2016 8:00 AM 0.00 0.0 M M M
12/30/2016 8:00 AM 0.00 0.0 M M M
12/31/2016 8:00 AM T 0.0 0.00 M M A very moist lower atmospheric layer brought early evening fog on Friday the 30th. In combination with a very weak front associated with a moist upper air low pressure center slipping southward along the Central California Coast...some drizzle began right around obs time the morning of the 31st.
1/1/2017 8:00 AM 0.14 0.0 0.00 M M A low pressure center slipping down the coast with its associated occluded front pushed rain eastward over the Central San Joaquin Valley the afternoon of Saturday the 31st. Interestingly enough heavier and larger amounts of rain fell over the South S.J. Valley with this rain event.
1/2/2017 8:00 AM 0.00 0.0 M M M
1/3/2017 8:00 AM T 0.0 0.00 M M A moist zonal flow across the state with more significant precipitation to the north resulted in a few periods of very light and brief rain showers Monday afternoon at the observation site.
1/4/2017 8:00 AM 0.52 0.0 0.00 M M A moist zonal flow began impacting Central California by early afternoon of Tuesday the 3rd and 0.29" of rain had fallen by 4:30 PM PST. Moderate rain fell for awhile just before dawn. Wind still SE at dawn and still sprinkling.
1/5/2017 8:00 AM 0.20 0.0 0.00 M M The moist zonal flow brought periods of light rain over the last 24 hours.
1/6/2017 8:00 AM 0.00 0.0 0.00 M M A respite occurred over the last 24 hrs from a series of moist impulses over Central California. But the cleared skies did bring widespread frost with low temperatures in the upper 20s.
1/7/2017 8:00 AM 0.20 0.0 0.00 M M Another surge of precipitation in zonal flow began sweeping into Central California the early morning hours of Saturday the 7th.
1/8/2017 8:00 AM 0.48 0.0 0.00 M M Another 24-Hr period of R-/R for the observation site as a moist WSW flow continued over Central California. Orographics continue to support continuous precipitation in the Southern Sierra Nevada even in the absence of strong dynamics.
1/9/2017 7:00 AM 0.42 0.0 0.00 M M The 24-hr period was marked by two distinct periods of rain... Mid-afternoon of Sunday the 8th and before dawn this morning of the 9th.
1/10/2017 8:00 AM 0.05 0.0 0.00 M M Light rain began in the wee hours of the morning as another weather system in the moist WSW flow aloft began to enter Central California.
1/11/2017 7:00 AM 0.46 0.0 0.00 M M Cloudy conditions prevailed all day still reflecting the moist WSW flow aloft over Central California. Rain shower activity continued through the day ending at midnight of the 10th as a slow..southward moving frontal band cleared the obs location.
1/12/2017 8:00 AM 0.20 M M M M Shower activity occurred during the wee hours of the morning of the 12th. Heavy small stream flows continue for the area.
1/13/2017 8:00 AM 0.54 0.0 0.00 M M Shower activity wound down Thursday afternoon the 12th. Dense fog formed around midnight lingering until obs time on the 13th, rain total for the month so far is 3.07"inspirational .
1/14/2017 8:00 AM 0.00 0.0 M M M
1/15/2017 8:00 AM 0.00 0.0 M M M The 'fog regime'' is well in place following almost 2 weeks of rain for the floor of the San Joaquin Valley.
1/16/2017 8:00 AM 0.00 0.0 M M M
1/17/2017 8:00 AM 0.00 0.0 M M M
1/18/2017 8:00 AM 0.00 0.0 M M M
1/19/2017 8:00 AM 0.52 0.0 0.00 M M Rain began at 10:00 AM PST with the oncoming warm front with precipitation becoming heavier around 2 PM PST thereby continuing until 7 PM PST with the cold front passage.
1/20/2017 8:00 AM 0.48 0.0 0.00 M M Light to moderate rain showers over the last 24 hours. Still raining at obs time.
1/21/2017 7:00 AM 0.11 0.0 0.00 M M Unsettled weather with rain showers sporadically through the 24-hr period. Light rain with 0.03" ended at 0900PST Friday the 20th...with another 0.02" in a very brief moderate shower 1420-1430PST. In light rain shower activity another 0.03" was added to 2000PST and then rain began again just before obs time for another 0.03". The running total for the month of January 4.18".
1/22/2017 7:00 AM 0.10 0.0 0.00 M M Light rain ended by 0800PST Saturday morning the 21st. Overnight frontal passage in the middle of the night resulted in 0.10" of rain.
1/23/2017 7:00 AM 0.45 0.0 0.00 M M Another 24-hr period of rain and showers. From 0700PST Sunday the 22nd to 1350PST showers brought 0.09". Rain began at 1805PST and continued at light to moderate rates to obs time with additional 0.36".
1/24/2017 8:00 AM 0.06 0.0 0.00 M M After lingering showers from an early morning frontal passage brought 0.06" of rain...convection with some thunderstorms over the S.J.Valley late afternoon/early evening hours but only a trace of rain fell at the station late in the afternoon. With a break in the rain pattern the station January rain total is 4.79".
1/25/2017 8:00 AM 0.00 0.0 M M M
1/26/2017 8:00 AM 0.00 0.0 M M M
1/27/2017 8:00 AM 0.00 0.0 M M M
1/28/2017 8:00 AM 0.00 0.0 M M M
1/29/2017 8:00 AM 0.00 0.0 M M M
1/30/2017 8:00 AM 0.00 0.0 M M M
1/31/2017 8:00 AM 0.00 0.0 M M M
2/1/2017 8:00 AM 0.00 0.0 M M M
2/2/2017 7:00 AM 0.08 0.0 0.00 M M A mild southwest flow from an upper low resident off the California Coast brought light rain to the area just before dawn. Very light shower activity still occurring at obs time.
2/3/2017 7:00 AM 0.15 0.0 0.00 M M A weak frontal passage brought light rain in the hours just after midnight. Lingering showers continued with only Trace amounts through obs time.
2/4/2017 8:00 AM 0.31 0.0 0.00 M M Mid-day rain gave way to afternoon convective showers over the Northern San Joaquin Valley.
2/5/2017 7:00 AM 0.00 0.0 0.00 M M Dense Fog on the first clear night after another three days of rain.
2/6/2017 7:00 AM 0.11 0.0 0.00 M M Rain began in the early evening hours of the 5th and ended just before midnight... with light showers again at dawn.
2/7/2017 7:00 AM 0.18 0.0 0.00 M M Rain tapered off right after observation on Monday the 6th with just an additional Trace and remained unsettled and cloudy the jremainder of the day. Rain began late in the evening around 10 PM and ended in the hours after midnight. Rain amount for this month at 0.83".
2/8/2017 7:00 AM 0.12 0.0 0.00 M M The 24 hour period was marked by intermittent light rain showers and sprinkles. Furthermore, much above normal temperatures with the near saturation conditions maintains the soggy soils.
2/9/2017 7:00 AM 0.01 0.0 0.00 M M Very light rain tapered off by 11 AM PST with the remainder of the day remaining cloudy.
2/10/2017 7:00 AM 0.55 0.0 0.00 M M Cold-frontal passage pushed through the North San Joaquin Valley beginning late in the afternoon of Thursday the 9th and ending in the early morning hours just after midnight.
2/11/2017 7:00 AM 0.94 0.0 0.00 M M Light to moderate rain showers continued for the 24-hour observation period.
2/12/2017 7:00 AM T 0.0 0.00 M M Post-frontal mild convection brought a few sprinkles intermittently during the afternoon hours as High Pressure began to build and end the current rain episode.
2/13/2017 7:00 AM 0.00 0.0 0.00 M M Sunday the 12th was the first mild, fair weather day in over a week for Central California. Rain accumulation for February so far is 2.45". Due to 1.50" of rain even at this Chowchilla site, greater accumulation in the foothills NE of the station on Thursday the 9th and into Friday the 12th resulted in flooding from Mariposa and Owens Creeks at the Valley/foothill interface.
2/14/2017 8:00 AM 0.00 0.0 M M M
2/15/2017 8:00 AM 0.00 0.0 M M M
2/16/2017 8:00 AM 0.07 0.0 0.00 M M Cold-front passage at dawn with light rain. Steady rain ending at 0800PST turning to light showers.
2/17/2017 7:00 AM 0.30 0.0 0.00 M M Rain tapered off by 9:00am Thursday morning the 16th with an added 0.01" before rain began early this morning at 4:30am and bringing 0.29" through obs time.
2/18/2017 6:00 AM 0.21 0.0 0.00 M M Rain continued until 1030PST accumulating 0.11". Strong SE wind 22-30mph with gusts around 40mph occurred from 0930-1630PST.. additional 0.10" occurred in RW- from 1130-1900PST but was likely under-measured due to the strong wind.
2/20/2017 7:00 AM 0.53 0.0 0.00 M M Soils are saturated with surface ponding with the additional overnight moderate rain. Light rain brought about 0.10" Sunday afternoon. But rain overnight turned moderate around 4AM tapering off to light around 6:30AM.
2/21/2017 6:00 AM 0.03 0.0 0.00 M M Rain tapered off early Monday morning the 20th just after obs time. Strong, gusty SE winds through the day.
2/22/2017 6:00 AM 0.11 M M M M Convective rain showers began in the area around noon on Tuesday the 21st. Intermittent lIght rain showers began to occur late in the afternoon with last occurring in the hours immediately after midnight. The February station rain accumulation stands at 3,90".
2/23/2017 8:00 AM 0.00 0.0 M M M
2/24/2017 8:00 AM 0.00 0.0 M M M
2/25/2017 8:00 AM 0.00 0.0 M M M
2/26/2017 8:00 AM 0.00 0.0 M M M
2/27/2017 7:00 AM T M M M M A weak short-wave trof passed over the area just before dawn and some light instability showers occurred. No significant accumulations occurred with its passage and the pattern now changes to one of fair weather.
2/28/2017 7:00 AM 0.00 0.0 M M M High Pr4ssure building along the coast ends the rain threat for the month of February. Total rainfall for the station at 3.70".
3/1/2017 8:00 AM 0.00 0.0 M M M
3/2/2017 8:00 AM 0.00 0.0 M M M
3/3/2017 8:00 AM 0.00 0.0 M M M
3/4/2017 8:00 AM 0.00 0.0 M M M
3/5/2017 7:00 AM T 0.0 M M M Light rain began just before observation time on Sunday the 5th.
3/6/2017 7:00 AM 0.20 0.0 M M M Rain began just before observation time on Sunday the 5th. It ended in the late morning hours with intermittent moderate to heavy rain shower activity after 7:00 AM PST.
3/7/2017 8:00 AM 0.00 0.0 M M M
3/8/2017 8:00 AM 0.00 0.0 M M M
3/9/2017 8:00 AM 0.00 0.0 M M M
3/10/2017 8:00 AM 0.00 0.0 M M M
3/11/2017 8:00 AM 0.00 0.0 M M M
3/12/2017 8:00 AM 0.00 0.0 M M M
3/13/2017 8:00 AM 0.00 0.0 M M M
3/14/2017 8:00 AM 0.00 0.0 M M M
3/15/2017 8:00 AM 0.00 0.0 M M M
3/16/2017 8:00 AM 0.00 0.0 M M M
3/17/2017 8:00 AM 0.00 0.0 M M M
3/18/2017 8:00 AM 0.00 0.0 M M M
3/19/2017 8:00 AM 0.00 0.0 M M M
3/20/2017 8:00 AM 0.00 0.0 M M M
3/21/2017 7:00 AM 0.07 M M M M A warm southwest flow brought moisture over Central California beginning during the day on Monday the 20th. With the increasing moisture very light rain fell during the early morning hours just before dawn at the station this Tuesday morning.
3/22/2017 6:00 AM 0.73 M M M M Brisk southeast wind 15-20mph ahead of an instability line located through Merced County in the early afternoon led to a convergence line that brought convection Tuesday afternoon the 21st. Thunder began at 2:50PM PDT and did not end until 6:05PM. Very brief, light, and intermittent rain showers of large drops and occasional 1/4-inch hail mixed into some showers occurred from 3:57PM to 5:03PM accounting for 0.04". However, the convergence focus line reached the obs site at 5:06PM and very heavy thundershower ensued until 6:03PM bringing 0.69" in that 57 minute time period.
3/23/2017 7:00 AM 0.09 M M M M A weak frontal passage brought steady light rain from just before 8:00AM to just after 10:00AM PDT on Wednesday morning the 22nd. Post-frontal showers added a few hundredths in the late afternoon hours.
3/24/2017 8:00 AM 0.00 0.0 M M M
3/25/2017 7:00 AM 0.25 M M M M A few sprinkles began at 11:45 AM PDT on Friday the 24th but light rain did not begin until an hour later. The main frontal band came through just after midnight with the bulk of the accumulation between 11PM and 3 AM.
3/26/2017 7:00 AM 0.00 0.0 M M M
3/27/2017 7:00 AM 0.04 M M M M A very weak cold-frontal passage swept through Central California in the middle of the night of March 26th/27th with only light amounts of precipitation resulting.
3/28/2017 8:00 AM 0.00 0.0 M M M
3/29/2017 8:00 AM 0.00 0.0 M M M
3/30/2017 7:00 AM T M M M M Just sprinkles occurred at dawn and just before obs time on Thursday the 30th.
3/31/2017 7:00 AM 0.01 M M M M Just after obs time on Thursday the 30th..a very brief rain shower occurred.
4/1/2017 8:00 AM 0.00 0.0 M M M
4/2/2017 8:00 AM 0.00 0.0 M M M
4/3/2017 8:00 AM 0.00 0.0 M M M
4/4/2017 8:00 AM 0.00 0.0 M M M
4/5/2017 8:00 AM 0.00 0.0 M M M
4/6/2017 8:00 AM 0.00 0.0 M M M
4/7/2017 7:00 AM 0.11 M M M M Frontal passage occurred overnight with rain beginning in the late evening hours and tapering off by 2 AM PDT.
4/8/2017 7:00 AM 0.09 M M M M The observation period beginning Friday morning the 7th was marked by showers leading to 0.09" of accumulation. The larger amount of rain fell during the late morning to early afternoon time period but another shower occurred in the hours just before Saturday the 8th dawn.
4/9/2017 7:00 AM 0.03 M M M M Convection developed in the post-frontal airmass by mid-day with subsequent rain showers developing by early afternoon. Intermittent light showers fell during the afternoon of Saturday the 8th and ceased by sunset. The most wetting shower occurred giving 0.02" around 1 PM PDT ... and another around 6:00 PM. Skies cleared overnight.
4/10/2017 8:00 AM 0.00 0.0 M M M
4/11/2017 8:00 AM 0.00 0.0 M M M
4/12/2017 7:00 AM T 0.0 M M M A few intermittent sprinkles occurred during the mid to late morning hours of Tuesday the 11th. Clearing occurred during the afternoon hours.
4/13/2017 7:00 AM 0.06 0.0 M M M Rain began just before dawn on Thursday the 13th.
4/14/2017 7:00 AM 0.10 M M M M Light rain occurred from around dawn to mid-morning on Thursday the 13th during a weak, warm-frontal passage.
4/15/2017 8:00 AM 0.00 0.0 M M M
4/16/2017 8:00 AM 0.00 0.0 M M M
4/17/2017 7:00 AM 0.10 M M M M Light rain began at the observation site early Easter Afternoon the 16th with measurable rain beginning very late afternoon.
4/18/2017 7:00 AM 0.11 M M M M Only Trace amounts of rain occurred in very light and only intermittent sprinkles mid-day and afternoon Monday the 17th as a southwest flow over Central California began moistening the lower atmosphere. Periods of light rain showers beginning at 7 PM PDT and overnight brought 0.11" with rain continuing at obs time Tuesday morning.
4/19/2017 7:00 AM 0.26 M M M M Showers continued from unsettled weather early in the week around Central California and ended late Tuesday afternoon the 18th.
4/20/2017 8:00 AM 0.00 0.0 M M M
4/21/2017 8:00 AM 0.00 0.0 M M M
4/22/2017 8:00 AM 0.00 0.0 M M M
4/23/2017 8:00 AM 0.00 0.0 M M M
4/24/2017 8:00 AM 0.00 0.0 M M M
4/25/2017 8:00 AM 0.00 0.0 M M M
4/26/2017 8:00 AM 0.00 0.0 M M M
4/27/2017 8:00 AM 0.00 0.0 M M M
4/28/2017 8:00 AM 0.00 0.0 M M M
4/29/2017 8:00 AM 0.00 0.0 M M M
4/30/2017 8:00 AM 0.00 0.0 M M M
5/1/2017 8:00 AM 0.00 0.0 M M M
5/2/2017 8:00 AM 0.00 0.0 M M M
5/3/2017 8:00 AM 0.00 0.0 M M M
5/4/2017 8:00 AM 0.00 0.0 M M M
5/5/2017 8:00 AM 0.00 0.0 M M M
5/6/2017 8:00 AM 0.00 0.0 M M M
5/7/2017 7:00 AM T M M M M A closed, cutoff Low Pressure center developed over the South-Central San Joaquin Valley late Saturday afternoon the 6th of May with measureable precipitation occurring over the South Valley. However, the North S.J.Valley received no measureable north of the Fresno area with only a few sprinkles in the very early morning hours around the obs site.
5/8/2017 8:00 AM 0.00 0.0 M M M
5/9/2017 8:00 AM 0.00 0.0 M M M
5/10/2017 8:00 AM 0.00 0.0 M M M
5/11/2017 8:00 AM 0.00 0.0 M M M
5/12/2017 8:00 AM 0.00 0.0 M M M
5/13/2017 8:00 AM 0.00 0.0 M M M
5/14/2017 8:00 AM 0.00 0.0 M M M
5/15/2017 8:00 AM 0.00 0.0 M M M
5/16/2017 8:00 AM 0.00 0.0 M M M
5/17/2017 8:00 AM 0.00 0.0 M M M
5/18/2017 8:00 AM 0.00 0.0 M M M
5/19/2017 8:00 AM 0.00 0.0 M M M
5/20/2017 8:00 AM 0.00 0.0 M M M
5/21/2017 8:00 AM 0.00 0.0 M M M
5/22/2017 8:00 AM 0.00 0.0 M M M
5/23/2017 8:00 AM 0.00 0.0 M M M
5/24/2017 8:00 AM 0.00 0.0 M M M
5/25/2017 8:00 AM 0.00 0.0 M M M
5/26/2017 8:00 AM 0.00 0.0 M M M
5/27/2017 8:00 AM 0.00 0.0 M M M
5/28/2017 8:00 AM 0.00 0.0 M M M
5/29/2017 8:00 AM 0.00 0.0 M M M
5/30/2017 8:00 AM 0.00 0.0 M M M
5/31/2017 8:00 AM 0.00 0.0 M M M
6/1/2017 7:00 AM 0.02 M M M M A weak, late-spring cold-front moved through Central California in the mid-morning hours with intermittent, very light rain the morning of Wednesday, May 31st.
6/2/2017 8:00 AM 0.00 0.0 M M M
6/3/2017 8:00 AM 0.00 0.0 M M M
6/4/2017 8:00 AM 0.00 0.0 M M M
8/1/2017 8:00 AM 0.00 0.0 M M M
8/2/2017 8:00 AM 0.00 0.0 M M M
8/3/2017 8:00 AM 0.00 0.0 M M M
8/4/2017 8:00 AM 0.00 0.0 M M M
8/5/2017 8:00 AM 0.00 0.0 M M M
8/6/2017 8:00 AM 0.00 0.0 M M M
8/7/2017 8:00 AM 0.00 0.0 M M M
8/8/2017 8:00 AM 0.00 0.0 M M M
8/9/2017 8:00 AM 0.00 0.0 M M M
8/10/2017 8:00 AM 0.00 0.0 M M M
8/11/2017 8:00 AM 0.00 0.0 M M M
8/12/2017 8:00 AM 0.00 0.0 M M M
8/13/2017 8:00 AM 0.00 0.0 M M M
8/14/2017 8:00 AM 0.00 0.0 M M M
8/15/2017 8:00 AM 0.00 0.0 M M M
8/16/2017 8:00 AM 0.00 0.0 M M M
8/17/2017 8:00 AM 0.00 0.0 M M M
8/18/2017 8:00 AM 0.00 0.0 M M M
8/19/2017 8:00 AM 0.00 0.0 M M M
8/20/2017 8:00 AM 0.00 0.0 M M M
8/21/2017 8:00 AM 0.00 0.0 M M M
8/22/2017 8:00 AM 0.00 0.0 M M M
8/23/2017 8:00 AM 0.00 0.0 M M M
8/24/2017 8:00 AM 0.00 0.0 M M M
8/25/2017 8:00 AM 0.00 0.0 M M M
8/26/2017 8:00 AM 0.00 0.0 M M M
8/27/2017 8:00 AM 0.00 0.0 M M M
8/28/2017 8:00 AM 0.00 0.0 M M M
8/29/2017 8:00 AM 0.00 0.0 M M M
8/30/2017 8:00 AM 0.00 0.0 M M M
8/31/2017 8:00 AM 0.00 0.0 M M M
9/1/2017 8:00 AM 0.00 0.0 M M M
9/2/2017 8:00 AM 0.00 0.0 M M M
9/3/2017 8:00 AM 0.00 0.0 M M M
9/4/2017 8:00 AM 0.00 0.0 M M M
9/5/2017 8:00 AM 0.00 0.0 M M M
9/6/2017 8:00 AM 0.00 0.0 M M M
9/7/2017 8:00 AM 0.00 0.0 M M M
9/8/2017 8:00 AM 0.00 0.0 M M M
9/9/2017 8:00 AM 0.00 0.0 M M M
9/10/2017 8:00 AM 0.00 0.0 M M M
9/11/2017 8:00 AM 0.00 0.0 M M M
9/12/2017 7:00 AM 0.11 M M M M Convection during the evening hours of Sept 11th. A long-lasting low pressure center meandering off the California Coast and specifically off Southern California on the 11th brought sub-tropical moisture northwestward during the resulting in thunder beginning at 1855PDT. Frequent cloud-to-cloud lightning occurred for much of the remaining evening. No gusty wind occurred at station but two periods of thundershowers occurred from 2119-2136PDT with 0.03" of rain and another from 2038-2105 with an additional 0.08".
9/13/2017 8:00 AM 0.00 0.0 M M M
9/14/2017 8:00 AM 0.00 0.0 M M M
9/15/2017 8:00 AM 0.00 0.0 M M M
9/16/2017 8:00 AM 0.00 0.0 M M M
9/17/2017 8:00 AM 0.00 0.0 M M M
9/18/2017 8:00 AM 0.00 0.0 M M M
9/19/2017 8:00 AM 0.00 0.0 M M M
9/20/2017 8:00 AM 0.00 0.0 M M M
9/21/2017 7:00 AM 0.09 M M M M The first day of Fall resulted in the first cool-season synoptic rain pattern with a NW-to-SE frontal passage through Central California in the early morning hours. Only a few hundredths fell in the cold-frontal passage.



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