The warning included the cities of Chula Vista, El Cajon and National City.
In a social media post, NWS said the warning expired at 12:45 p.m. The area affected an estimated 367,500 residents, 96 schools and a hospital.
Orange County, San Diego's neighbor to the north, began experiencing heavy rainfall late Tuesday morning. As a result, the NWS issued a Flash Flood Warning in the area through 1 p.m.
While a tornado warning was issued and later expired, the NWS did not confirm that a tornado struck the area.
Over the weekend, Gov. Gavin Newsom declared a state of emergency for eight of the Golden State’s counties, including Los Angeles, Santa Barbara, Los Angeles, and San Diego, in anticipation of the potent storm.
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SAN DIEGO (Photo by Sandy Huffaker/Getty Images) (Getty Images)
This story was reported from Los Angeles.