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The ENSO cycle has a huge effect on rainfall and snowfall patterns in California, especially during the winter and spring seasons. During the El Niño phase, the jet stream is located south through California, allowing for warmer temperatures and more heavy rains to occur, particularly in the southern portions of the state.
Rainfall totals in Northern California from Monday, March 27, 2023, to Wednesday, March 29, 2023. In addition to the rain, hail pounded San Francisco and surrounding neighborhoods.
The time of maximum precipitation during the day gradually varies from late afternoon near the slopes of the Rockies to early morning near the Ohio River valley, [37] in part reflecting the west-to-east propagation of mesoscale convective systems. Mesoscale convective systems bring 30 to 70 percent of the annual warm season rainfall to the ...
Precipitation episodes in Los Angeles, with a few notable exceptions, are largely caused by extratropical disturbances approaching California from the west or northwest during the winter season. Of the total annual precipitation recorded in Los Angeles, 92% falls between November 1 and April 30. [ 11 ]
We nearly doubled our seasonal snowfall by receiving 11" (28 cm) of #snow over the last 24 hours. It was 14" (35.5 cm) prior to yesterday's storm and our seasonal total is now 25" (63.5 cm).
In Southern California, the best chance of at least an inch of rainfall will be in Santa Barbara County, with decreasing rainfall totals farther east into Ventura, L.A Counties and the Inland ...
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 .
Southern California rain totals from the latest atmospheric river storm topped 10 inches in some areas, easily besting the average for the entire month of February.