A large low pressure system which was centered off the central California Coast on the morning of April 13 lifted northeast across northern California that afternoon while an associated upper trough pushed into the western United States. This system pushed a cold front through central California during the afternoon which produced strong wind gusts across much of the area on the 13th. There were numerous reports of winds gusts exceeding 35 mph int he San Joaquin Valley and several reports of gusts exceeding 45 mph across the Kern County Mountains and Deserts. Moderate rainfall associated with the cold front produced a quarter to half inch of rain in a few hours across Merced and Mariposa Counties as well as across Yosemite National Park.  In addition, isolated thunderstorms formed in the cooler post frontal airmass. A nearly stationary thunderstorm in Fresno produced 2.00 inches of rainfall at Fresno Yosemite International Airport there were media reports of flash flooding in Fresno.  In fact the 2.04 inches of rain measured at the Fresno Airport on April 13 set a new record rainfall amount for the date, and is now also the highest amount for any day in April since records began in the 1880's. Meanwhile, outflow from thunderstorms produced blowing dust on the west side of the San Joaquin Valley as there were numerous reports of vehicular accidents and visibility was reduced to less than an eighth of a mile in the vicinity of Lemoore.

High Wind in KERN CTY MTNS, CALIFORNIA
From 13-APR-17 16:00:00 to 13-APR-17 16:00:00 (PST-8)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Walker Pass RAWS reported a peak wind gust of 61 mph.

Flash Flood in FRESNO, CALIFORNIA
From 13-APR-17 14:57:00 to 13-APR-17 15:57:00 (PST-8)
Location: (FAT) AIR TERMINAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flash Flooding was reported with a picture on Twitter at the intersection of McKinley Ave and Fine Ave in Fresno.

Funnel Cloud in FRESNO, CALIFORNIA
From 13-APR-17 12:30:00 to 13-APR-17 12:30:00 (PST-8)
Location: FOWLER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A funnel cloud was reported near the Highway 99/Clovis Avenue exchange via picture posted on Facebook.

Heavy Rain in FRESNO, CALIFORNIA
From 13-APR-17 15:15:00 to 13-APR-17 17:00:00 (PST-8)
Location: (FAT) AIR TERMINAL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Heavy rainfall was reported at the Fresno ASOS as 2 inches of rain fell between 415 pm PDT and 600 pm PDT from a nearly stationary thunderstorm. In addition, nearly 2200 customers in Fresno lost power during the thunderstorm.

Dust Storm in SW S.J. VALLEY, CALIFORNIA
From 13-APR-17 14:00:00 to 13-APR-17 14:20:00 (PST-8)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A television station reported a 22 car pileup on Avenal Cutoff Rd near SR 198 just after 300 pm PDT when blowing dust caused by outflow from a nearby thunderstorm reduced visibility to an eighth of a mile. 2 children were reported injured from the pileup.

High Wind in TULARE CTY MTNS, CALIFORNIA
From 13-APR-17 16:10:00 to 13-APR-17 16:10:00 (PST-8)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Bear Peak RAWS reported a peak wind gust of 73 mph.