A strong ridge of high pressure aloft lingered over California and the Desert Southwest  the first 3 days of the month, keeping the central and southern San Joaquin Valley under triple-digit heat. A monsoonal flow triggered thunderstorms over the mountains and the Kern county deserts, and one thunderstorm near Rosamond on September 1st spawned a tornado that moved through the town; a National Weather Service storm survey rated the tornado at EF0 on the new Enhanced Fujita scale. As the thunderstorm collapsed, it generated high winds that knocked down several power poles and created areas of blowing dust. Other thunderstorms in the same complex dropped ��-inch hail on the town of Boron in the southeastern corner of Kern county, generated a wind gust measured at 83 mph at the Mojave Air and Spaceport, and caused flash flooding in the vicinity of Mojave and California City.

Thunderstorm Wind in KERN, CALIFORNIA
From 01-SEP-07 15:35:00 to 01-SEP-07 15:35:00 (PST-8)
Location: ROSAMOND
Magnitude: 55.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported a power pole on a house on 53rd Street on the west side of Rosamond. These winds were associated with the severe thunderstorm that spawned a tornado nearby.

Thunderstorm Wind in KERN, CALIFORNIA
From 03-SEP-07 16:25:00 to 03-SEP-07 16:25:00 (PST-8)
Location: MOJAVE
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A damaging wind gust, in association with a severe thunderstorm, was report at the Mojave Spaceport with data from the Edwards Weather System wind tower.

Flash Flood in KERN, CALIFORNIA
From 03-SEP-07 16:45:00 to 03-SEP-07 18:00:00 (PST-8)
Location: MOJAVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported Highway 14 flooded in both directions near the intersection of California City Blvd. Flooding was also occurring around the Mojave Airport.

Tornado in KERN, CALIFORNIA
From 01-SEP-07 15:30:00 to 01-SEP-07 15:50:00 (PST-8)
Location: ROSAMOND
Tornado F-scale: EF0
Property damage: 175.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Official NWS damage survey determined that an EF0 (Enhanced Fujita) tornado touched down about 3 miles southwest of Rosamond...then traveled  north through Rosamond and northeast to about 3 miles southeast of Mojave. This tornado had estimated wind speeds of 65-85 mph. The first touchdown occurred near the intersection of Avenue A and 40th Street West, which is about 3 miles southwest of Rosamond. Minor property damage occurred in this area with several fences blown over and small trees and branches downed. The tornado then traveled north to around Rosamond Blvd, where numerous utility poles were blown over, branches were downed and some miscellaneous debris was found. The path then curved northeast and crossed Highway 14 near Dawn and Backus Roads and Sierra Highway. Damage in this area amounted to some property damage to several mobile homes. Minor debris was found a few miles southeast of Mojave, which is the area that the tornado dissipated.

Funnel Cloud in KERN, CALIFORNIA
From 01-SEP-07 15:07:00 to 01-SEP-07 15:07:00 (PST-8)
Location: ROSAMOND ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Public reports of a funnel cloud were relayed through the Sheriff's Office between Rosamond and Lancaster. This is the storm that produced an EF0 tornado in the Rosamond area shortly thereafter.