Tropical Storm Hilary: Southern California Sees Historic Rainfall
August 21, 2023
Flash flood warnings continue amid record rain
Flash flood warnings remained in effect on Monday in Los Angeles, Death Valley and some areas of southwest Nevada, after heavy rain fell overnight throughout the region.
Hilary weakened overnight into a post-tropical cyclone and was expected to dissipate in the high mountains of the Sierra Nevada.
Copious amounts of rain fell overnight, including the 10.5 inches that soaked Raywood Flat, California, a rocky area within the San Bernardino National Forest.
About 6.15 inches fell in Los Angeles. Palmdale, a city north of the Los Angeles, had its highest all-time daily rainfall with 3.57 inches.
Palm Springs got 2.82 inches, marking the city’s highest daily rainfall for summer and for August.
San Diego had 1.81 inches, its highest-ever daily August rainfall.
And Bristlecone, Nevada, near Las Vegas, picked up more than 6 inches, mostly within 24 hours. That rainfall broke the record for a tropical cyclone or remnant traveling through Nevada. It approached the 24-hour rain record for the state of 7.78 inches, which was set in 2004.
Governor Newsome Proclaims State of Emergency
On August 19, ahead of Hilary’s impact, California Governor Gavin Newsome declared a State of Emergency for the following counties:
- Los Angeles
- San Bernardino
- San Diego
***Note: This event has not yet been declared a FEMA disaster. We will update you as more information becomes available.***
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