A strong upper low pressure system pushed southward through the Pacific Northwest on May 25. Warm air advection ahead of this system produced instability over the San Joaquin Valley during the afternoon and evening of May 25 which resulted in the development of scattered thunderstorms. One thunderstorm produced nickel sized hail between Mettler and Maricopa along State Route 166 and also produced roadway flooding in the area. The low moved southward through California on May 26 bringing increased clouds, significant rainfall and mountain snowfall, locally strong winds as well as thunderstorms with heavy rain. Much of the area received between a quarter and three quarters of an inch of liquid precipitation while several stations in the Sierra Nevada picked up between 2 to 5 inches of new snowfall with a few stations picking up 6 to 7 inches. Thunderstorms developed during the afternoon of May 26 across the San Joaquin Valley producing heavy rainfall, roadway flooding and a few funnel clouds. In addition, gusty winds prevailed for much of the day in the Tehachapi and Lake Isabella areas where there were several reports of wind gusts exceeding 35 mph while a few low impact indicator sites measured gusts above 55 mph. Several all time daily record precipitation records were shattered on May 26.

High Wind in TEHACHAPI AREA, CALIFORNIA
From 26-MAY-19 20:14:00 to 26-MAY-19 20:14:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Jawbone Canyon RAWS measured a peak wind gust of 62 mph.

High Wind in LAKE ISABELLA, CALIFORNIA
From 26-MAY-19 20:32:00 to 26-MAY-19 20:32:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Blue Max RAWS measured a peak wind gust of 60 mph.

Flash Flood in TULARE, CALIFORNIA
From 26-MAY-19 15:00:00 to 26-MAY-19 18:00:00 (PST-8)
Location: GOSHEN JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reported significant flooding on Road 92 south of Ferguson Ave. in west Visalia which led to the road being impassible.

Flood in KERN, CALIFORNIA
From 25-MAY-19 15:46:00 to 25-MAY-19 17:46:00 (PST-8)
Location: LAKEVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding on State Route 166 west of the Old River Rd. intersection.

Flood in KERN, CALIFORNIA
From 25-MAY-19 16:27:00 to 25-MAY-19 18:27:00 (PST-8)
Location: METTLER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway report reported roadway flooding on Wheeler Ridge Rd. east of Mettler.

Flood in KINGS, CALIFORNIA
From 26-MAY-19 13:30:00 to 26-MAY-19 16:30:00 (PST-8)
Location: HANFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several public reports and social media posts of flooding in downtown Hanford.

Flood in FRESNO, CALIFORNIA
From 26-MAY-19 13:37:00 to 26-MAY-19 15:37:00 (PST-8)
Location: SELMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported minor street flooding south of Selma.

Flood in FRESNO, CALIFORNIA
From 26-MAY-19 14:48:00 to 26-MAY-19 17:48:00 (PST-8)
Location: KINGSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported water 2 feet deep between Kingsburg and Selma.

Flood in KINGS, CALIFORNIA
From 26-MAY-19 15:41:00 to 26-MAY-19 17:41:00 (PST-8)
Location: ARMONA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Posts on Twitter indicated flooding in a neighborhood in southwest Hanford.

Funnel Cloud in KERN, CALIFORNIA
From 26-MAY-19 12:25:00 to 26-MAY-19 12:25:00 (PST-8)
Location: MYRICKS CORNER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Posts on Facebook and Twitter with pictures of a funnel cloud between Shafter and Wasco.

Funnel Cloud in TULARE, CALIFORNIA
From 26-MAY-19 13:20:00 to 26-MAY-19 13:20:00 (PST-8)
Location: TIPTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Posts on Facebook and Twitter of a funnel cloud near Tipton.

Hail in KERN, CALIFORNIA
From 25-MAY-19 15:09:00 to 25-MAY-19 15:09:00 (PST-8)
Location: LAKEVIEW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reports of estimated 1 inch diameter hail west of Mettler along State Route 166.

Hail in MERCED, CALIFORNIA
From 26-MAY-19 12:46:00 to 26-MAY-19 12:46:00 (PST-8)
Location: ATWATER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Pictures posted on Twitter indicated dome sized hail in Atwater.

Heavy Snow in CENTRAL SIERRA, CALIFORNIA
From 26-MAY-19 01:00:00 to 26-MAY-19 11:53:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated 5.0 inches of new snow at Fish Camp.

Heavy Snow in CENTRAL SIERRA, CALIFORNIA
From 26-MAY-19 01:00:00 to 26-MAY-19 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Gin Flat SNOTEL (7050 feet) picked up an estimated 7.0 inches of new snow.

Heavy Snow in SEQUOIA KINGS, CALIFORNIA
From 26-MAY-19 01:00:00 to 26-MAY-19 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Pascoes SNOTEL (9150 feet) picked up an estimated 6.0 inches of new snow.