It gives people who need to react to this plenty of time to react while an atmospheric river, there were places that got their monthly rainfall totals in a day. “We’re not too worried about drainage systems or water overfilling in places where it’s collected. “It’s going to be easier to manage this water because because it’s going to be persistent,” Murdock said. Unlike atmospheric river storms that deluged the Bay Area earlier this year, the potential for debris flows in areas burned by wildfires appears limited this time since the rain will be spread out over many days instead of continuous heavy rain in a short timeframe, according to the weather service. We’re going to be constantly adjusting the forecast depending on what we see,” said NWS forecaster David King. “We’re going to have minor waves of rainy activity through the course of the week. Another break should come Thursday morning, with more rain resuming by Friday afternoon and possibly lasting through the weekend. The storms may last through next Tuesday before tapering off, although some weather models show rain in the forecast for the rest of next week. The first lull in the rain was expected Wednesday morning, with showers likely to resume by the afternoon. Rain is expected through Christmas according to the National Weather Service. “This is uncommon for it to happen to begin with, but for a La Niña year, which tends to be drier for the Bay Area, this is even more uncommon.” SAN JOSE, CALIFORNIA – DECEMBER 21: A light rain falls as people view the Christmas tree at the Christmas in the Park display along South Market Street in downtown San Jose, Calif., on Tuesday, Dec. “We may have a conveyor belt situation that will get us more and more prolonged chances of rain,” Murdock said. Another low-pressure system will move down Friday night into Saturday and deliver another helping of rain. “It’s a rare setup in the Pacific where it’s sending low pressure, one of the bigger drivers of rain, coming down from British Columbia and meeting up with us,” said NWS forecaster Brayden Murdock.Ī cold front attached to the low-pressure system over the Pacific Ocean and off the coast of the Oregon-California border will rotate and push moisture towards Northern California, resulting in a steady band of rain that will bring showers with sporadic breaks over the region for several days. It last spilled in 20.Christmas will be a soggy one this year as another round of wet weather approached the Bay Area, kicking off a week of rain, according to the National Weather Service. It's less common for Lexington, a larger one, to spill. Keller said it's not unusual for Uvas, a smaller reservoir, to spill. Coyote Reservoir is 111% full, Uvas is 105% full, Almaden is 104% full and Lexington is 103% full. In the Santa Clara Valley Water District, four out of 10 reservoirs were full and spilling into waterways, said Matt Keller, a spokesperson for the district. 16, making it the fifth-wettest 21-day period in recorded history.Īll of this weather has replenished local reservoirs. Downtown San Francisco, for example, measured 17 inches between Dec. The Bay Area has received the majority of its rain this season since Dec. To the north, Santa Rosa has measured 25.08 inches of rain, bringing in 158% of normal to date for the water year. 1, picking up 252% of the average total rainfall to date. On the peninsula, a site in Redwood City has recorded 21.06 inches since Oct. Last year, at this time, the location had measured 16.84 inches. 1, 2022, which is 205% of normal to date. 16, the site has picked up 21.75 inches since Oct. The weather service's gauge in downtown San Francisco is already nearing the annual average, which is 22.89 inches from Oct. Water managers use the water year, which follows the water cycle starting in the rainy season and running through spring and summer when the snowpack melts and its runoff flows into reservoirs and streams.
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