The persistent cut off upper low remained situated off the central California coast and continued to pull tropical moisture northward into central California. Some deep tropical moisture associated with a fairly strong upper level shortwave pushed into central California on September 11 and produced a severe thunderstorm outbreak during the afternoon and evening. Numerous reports of downburst winds exceeding 60 mph were reported and the impacts form these thunderstorms included downed power lines, damage to roofs; and large objects being knocked over and damaged.  Rainfall amounts were generally a quarter of an inch or less with a few locations in the Southern Sierra Nevada and Tehachapi Mountains receiving between a quarter inch and a half inch of rain.

Hail in TULARE, CALIFORNIA
From 11-SEP-17 15:30:00 to 11-SEP-17 15:30:00 (PST-8)
Location: CAMP NELSON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A Weather Service forecaster providing onsite support at the Pier Fire reported penny sized hail at Pierpoint Springs.

Lightning in KINGS, CALIFORNIA
From 11-SEP-17 19:00:00 to 11-SEP-17 19:00:00 (PST-8)
Location: SHORT ACRES
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

A report of lightning striking a house near Hanford High School was reported on social media.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:42:00 to 11-SEP-17 16:42:00 (PST-8)
Location: HANFORD BLAIR ARPT
Magnitude: 52.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media report of a dairy farm south of Hanford having several barns with extensive roof damage from thunderstorm winds.

Thunderstorm Wind in TULARE, CALIFORNIA
From 11-SEP-17 16:47:00 to 11-SEP-17 16:47:00 (PST-8)
Location: TIPTON
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported several trees down on northbound State Route 99 just south of the State Route 190 interchange.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:52:00 to 11-SEP-17 16:52:00 (PST-8)
Location: ARMONA
Magnitude: 43.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported tree debris on State Route 198 near Hanford-Armona Rd.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:53:00 to 11-SEP-17 16:53:00 (PST-8)
Location: HANFORD
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a fence blew onto State Route 198 near 11th Ave in Hanford.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:55:00 to 11-SEP-17 16:55:00 (PST-8)
Location: ARMONA
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a tree fell onto a vehicle near the intersection of 13th Ave. and Houston Ave. near Hanford.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:58:00 to 11-SEP-17 16:58:00 (PST-8)
Location: HANFORD BLAIR ARPT
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported 8 telephone poles were downed on Jackson Ave. near 9th Ave. south of Hanford.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 17:00:00 to 11-SEP-17 17:00:00 (PST-8)
Location: SHORT ACRES
Magnitude: 43.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Report received on social media of damage to outdoor furniture in Hanford near the intersection of Peralta Way and Monroe Dr.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 17:33:00 to 11-SEP-17 17:33:00 (PST-8)
Location: KERMAN BLAND ARPT
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported power lines downed by thunderstorm winds on West Manning Ave. to the west of Raisin City.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 17:47:00 to 11-SEP-17 17:47:00 (PST-8)
Location: CAMDEN
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a downed power line and a downed tree on East St. at the intersection of Wood Ave.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 18:00:00 to 11-SEP-17 18:00:00 (PST-8)
Location: MENDOTA
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media posted video showing 30 power lines downed in Mendota from a microburst.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 18:20:00 to 11-SEP-17 18:20:00 (PST-8)
Location: RAISIN CITY
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported power lines in the road on Westlawn Ave. near the intersection of Nebraska Ave.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 18:44:00 to 11-SEP-17 18:44:00 (PST-8)
Location: FIREBAUGH ARPT
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported power lines downed in the roadway on West Jerrold Ave. near West Bullard Ave near Firebaugh.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 19:28:00 to 11-SEP-17 19:28:00 (PST-8)
Location: HARDWICK
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported large tree limbs on the road on Maple Ave. between Excelsior Blvd. and Lewiston Ave near Hardwick.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 18:15:00 to 11-SEP-17 18:15:00 (PST-8)
Location: FIREBAUGH
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The APRS station 5WSW Firebaugh reported a 59 mph wind gust from a thunderstorm.

Thunderstorm Wind in KINGS, CALIFORNIA
From 11-SEP-17 16:28:00 to 11-SEP-17 16:28:00 (PST-8)
Location: CORCORAN
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Public report in Corcoran of Thunderstorm winds producing damage to a house and snapping several trees. Beams from a wood fence were snapped from from concrete support and shingles were blown off of a roof.

Hail in KINGS, CALIFORNIA
From 11-SEP-17 16:28:00 to 11-SEP-17 16:28:00 (PST-8)
Location: CORCORAN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of nickel sized hail in Corcoran.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 11-SEP-17 17:23:00 to 11-SEP-17 17:23:00 (PST-8)
Location: CARUTHERS
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast Media report of a chicken barn blown down by thunderstorm downburst outflow winds.