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12/24/2024
WT Staff
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December 24, 2024 801 am PST
Thunderstorms in the Central Valley, rain at the coast with ongoing coastal flood warning for San Francisco area
Coastal Flood Warning issued by NWS San Francisco 437 am Tues Dec 24
COASTAL FLOOD WARNING WITH HIGH SURF WARNING REMAINS IN EFFECT UNTIL NOON PST TUESDAY
Coastal flooding in low lying areas. For the High Surf Warning, dangerously large
breaking waves of 25 to 35 feet.
Life-threatening swimming and surfing conditions and significant shoreline erosion can be expected. Numerous roads may be closed, and sand berms over-topped. Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters.
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.
Impacting Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast
Streamflow Situation from the network of USGS river flow gauges in California
Clear, 52 degrees in Central Valley Region 5 watershed Tuesday heading for a high of 57 with showers and possibly a thunderstorm coming on before 1pm. 100% chance of rain this afternoon between 1 and 4, followed by a chance of showers and thunderstorms again after 4pm, patchy fog occurring through the afternoon until 5pm, up to half an inch possible. For Christmas Eve, a 30% chance of a thunderstorm before 7pm, with rain until 10pm. Patchy dense fog after 10pm will move in overnight, the low down to around 40.
San Francisco reports the high surf warning until 6 pm tonight, the hazardous weather outlook for coastal flooding extends until noon today. Its 52 degrees with an 80% chance of showers coming before 11 am, up to a quarter inch of new precipitation. The high today in the Bay area around 59 with west wind gusts as high as 25 mph. Los Angeles reporting 52 degrees with ongoing air quality advisory. Rain is likely, 60% chance of precipitation less than a tenth coming between 10am and 4pm with patchy fog coming on before 10am. Clouds will clear gradually, becoming mostly sunny, with a high near 60. South wind gusts as high as 15 mph. San Diego remains under a high surf advisory until 4 pm Christmas Day, large breaking waves of 6 to 10 feet in San Diego County, with local sets to 13 feet. Waves of 5 to 8 feet in Orange County, with local sets to 12 feet on west-facing beaches. Patchy fog will come in before 10 am with 60% chance of showers, mainly after 4pm, mostly cloudy, high 63. Christmas Eve, 60% chance of showers before 10pm, low 51. Northwest wind gusts as high as 25 mph.
Streamflows run normal to much above normal in the North Coast Region 1, San Francisco, Central Coast and central valley watershed Region 5, with above normal streamflows in Los Angeles to San Diego watersheds. Interion Colorado River and Lahontan watershed regions remain below seasonal, Lahontan continues with extreme drought in southeast Inyo County, below normal conditions through the remainder of Inyo extending over the height of land divide into the Colorado River watershed's west San Bernardino County. Riverside and Imperial Counties are no longer rated below normal on the drought map.
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