Jul 5, 2011
An upper-level trough moved through the region on July 4th-6th. The trough interacted with a surge of monsoonal moisture, bringing thunderstorms to the Southern Sierra Nevada, Tehachapi Mountains and the Kern County deserts. The afternoon of July 4th saw gusts of 50-55 mph in the Kernville/Lake Isabella area, and hail up to a half-inch in diameter fell at Ponderosa in the Tulare County mountains. Heavy rain fell in Rosamond, with a spotter reporting 1.48 inch of rain that caused street flooding.
Source: NOAA National Weather Service Storm Events Database (event 338798). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Kern County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.