Thunderstorms developed over western Fresno County during the evening of June 4th, and rapidly grew in intensity. One severe thunderstorm had a reflectivity of 73 dBz, and a VIL (vertically integrated liquid) of 43 g/kg. Hail up to an inch in diameter fell near the town of Helm, and outflow winds were estimated at around 60 mph.
The low finally moved onshore on the 5th, and lifted northeast into northern Nevada that evening. An upper-level trough remained over California, with an unseasonably cold airmass aloft. Upper-level impulses moving through the trough continued the threat of afternoon and evening mountain convection, with isolated light showers drifting over the San Joaquin Valley at times. Temperatures fell to some 10-15 degrees below normal, and stayed well below normal for the next week.
The Grouse wildfire that was sparked by lightning on May 30th continued through the month of June. The ignition time was 1400 PST on May 30th, the location was 3 miles southwest of Yosemite Valley in Mariposa County.  The size of the fire was 3047 acres. The cost to containment was $2.9 million. The containment date was July 13th.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 04-JUN-09 23:48:00 to 04-JUN-09 23:48:00 (PST-8)
Location: HELM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Outflow winds from a severe thunderstorm reported by a Fresno County official.

Wildfire in S SIERRA MTNS, CALIFORNIA
From 01-JUN-09 00:00:00 to 30-JUN-09 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Hail in FRESNO, CALIFORNIA
From 04-JUN-09 23:20:00 to 04-JUN-09 23:25:00 (PST-8)
Location: KERMAN BLAND ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported Half-dollar sized hail 7 miles ESE of San Joaquin.

Hail in FRESNO, CALIFORNIA
From 04-JUN-09 23:35:00 to 04-JUN-09 23:40:00 (PST-8)
Location: KERMAN BLAND ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter-sized hail was reported by a trained spotter.

Hail in FRESNO, CALIFORNIA
From 04-JUN-09 23:10:00 to 04-JUN-09 23:15:00 (PST-8)
Location: HELM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported Quarter-sized hail 4 miles north of Five Points.

Lightning in MADERA, CALIFORNIA
From 05-JUN-09 00:32:00 to 05-JUN-09 00:32:00 (PST-8)
Location: DAULTON
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported tree damage due to lightning near the town of Daulton.

Thunderstorm Wind in FRESNO, CALIFORNIA
From 04-JUN-09 23:20:00 to 04-JUN-09 23:20:00 (PST-8)
Location: SAN JOAQUIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Outflow winds from a severe thunderstorm reported by a trained spotter.

Lightning in FRESNO, CALIFORNIA
From 05-JUN-09 00:54:00 to 05-JUN-09 00:54:00 (PST-8)
Location: CARUTHERS
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A utility pole was struck by lightning and set on fire near Caruthers.

Lightning in KERN, CALIFORNIA
From 03-JUN-09 08:15:00 to 03-JUN-09 08:15:00 (PST-8)
Location: KERNVALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a 13 year old boy riding a bicycle near Lake Isabella Blvd and Highway 178.

Hail in FRESNO, CALIFORNIA
From 04-JUN-09 23:48:00 to 05-JUN-09 00:00:00 (PST-8)
Location: KERMAN BLAND ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 2.00M
Reported by: County Official

Widespread large hail up to the size of quarters was reported near the town of Helm. Crop losses were estimated at $2 million by Fresno County officials.

Hail in FRESNO, CALIFORNIA
From 05-JUN-09 00:15:00 to 05-JUN-09 00:20:00 (PST-8)
Location: BURREL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported quarter-sized hail.