8/18/2023 0 Comments Bay area rainfall totals 2021![]() ![]() We would need something monumental and probably catastrophic to get out of it. "If you look at the amount of rain that has fallen over the last 19 months, most places are about half of normal,” says Jan Null, a meteorologist with Golden Gate Weather Services in Half Moon Bay and former NWS meteorologist, who compiled the rainfall data seen in the above tweet. After some snow on Wednesday, that may rise to 70%. As the Mercury News reports, the snowpack was at 38% of normal before last week's storms, and now it has risen to 68% of normal, so a good deal more snow needs to fall in order for the snowpack to catch up. The Sierra snowpack is growing, which is good news, but it is still well below the seasonal average. More rainfall is expected to shower the Bay Area this week but nowhere near enough to get San Francisco back to normal levels. San Francisco and San Jose are the 3rd driest since records began. The rainfall deficits across Northern Calif and the Sierra for the past 19-months continue to grow with many in the top 10 driest on record. #CAwx /RhNsH634EK- NWS Bay Area January 30, 2021 This topped the previous record set 97 years ago. Percent of normal increases were much greater farther to the south ( #SanJose, #Salinas) where the AR persisted for much longer. At a Glance July 2020-June 2021 was the driest July-June period on record in California. A pedestrian crosses a street using an umbrella during a rain shower in Oakland, California on Oct. total is 2.51 inches, The National Weather Service (NWS): Bay Area tweeted Monday. But with a total of just over 17 inches of rain in the past 19 months, the city is as 46% of normal - and this is the third driest period the city has seen since record-keeping began in 1849.Īn #AtmosphericRiver can have a big impact on seasonal rain totals, as can be seen by comparing totals before and after the recent AR event. Bay Area weather service increases projected rain totals for atmospheric river. San Francisco, specifically, has seen over three inches of rainfall in the city over the past the historic average of precipitation SF receives in all of December. Each day that passes under normal, it's harder and harder to catch up."ĭuring last week's atmospheric river event, downtown San Francisco saw 2.06 inches of rain over the course of 72 hours, and on Monday night another half inch fell. ![]() At this point, it's a question of how much under normal we're going to be. "In the Bay Area, we're kind of halfway where we need to be. "The storm did make a dent in the precipitation deficit, but it definitely did not erase it," says National Weather Service forecaster Drew Peterson, speaking to SFGate. Sure, we just saw a lot of rain get dumped on us - some places more than others - but we need a whole lot more, as meteorologists around the Bay Area keep saying. Unless the region gets walloped by a parade of crazy rainstorms in the next month or two, Northern California isn't likely to make up for the deficit of precipitation that our dry November, December and early January left us with. ![]()
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