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The storms caused record-breaking rainfall totals to be observed in multiple areas, as well as the declaration of states of emergency in multiple counties in Southern California. [3] [4] Wind gusts of hurricane force were observed in San Francisco, along with wind gusts reaching over 100 miles per hour (160 km/h) in the Sierra Nevada.
Flood watches, issued when conditions are favorable for flooding, will cover the coast in Sonoma, Marin, San Francisco, Monterey and San Luis Obispo counties, and all of Southern California’s coast.
Rainfall in San Francisco could surpass 15 inches from Oct. 1. Want next-level safety, ad-free? Unlock advanced, hyperlocal severe weather alerts when you subscribe to Premium+ on the AccuWeather ...
In a three-day period on January 3–5, 1982, significant flooding occurred in the San Francisco Bay area due to a significant storm system which impacted the area. . Widespread rainfall amounts of over 6 inches (150 mm) fell, triggering flooding, with portions of Marin County receiving up to 16 inches (410 mm) of rain and the San Lorenzo Valley receiving up to 25 inches
For example, the average daily high in San Francisco in July and August is between 62 and 68 °F (17 and 20 °C), [1] [2] and in Walnut Creek, some 20 miles (32 km) inland, the average daily high in July and August is 84 °F (29 °C): a temperature gain of more than one degree (Fahrenheit) per mile. [3]
San Diego received 1.82 inches — way above its 1906 record of 0.08 inch. Oceanside received 2.38 inches, compared with 0.04 inch in 1979. Vista trumped its 1979 record of 0.09 inch with 2.12 ...
Napa, north of San Francisco, recorded its worst flood to this time [29] while nearby Calistoga recorded 29 inches (740 mm) of rain in 10 days, creating a once-in-a-thousand-year rainfall event. [27] Records for 24-hour rain events were reported in the Central Valley and in the Sierra. Thousand-year rainfalls were recorded in the Sierras. [1]
One of the bomb cyclones related to the floods on January 4. Oakland set a record for 24 hour rainfall at 4.75 in (121 mm) of rain on December 31, while San Francisco recorded its second wettest day with 5.46 in (139 mm) of rain.