.Bay Area under flood watch ahead of ‘brutal’ rain storm

The entire Bay Area will be under a flood watch beginning Wednesday due to a heavy storm system expected to be as bad or worse than Saturday’s deluge and which will likely result in the loss of human life, according to a dire forecast update from the National Weather Service.

The update issued Monday afternoon includes five key points, with the first one noting a “threat to life likely during this storm.” Mudslides are anticipated due to saturated soil, and rapidly rising creeks and streams will pose additional dangers. A meteorologist shared the following observations in the forecast about the coming storm: “To put it simply, this will likely be one of the most impactful systems on a widespread scale that this meteorologist has seen in a long while. The impacts will include widespread flooding, roads washing out, hillside collapsing, trees down (potentially full groves), widespread power outages, immediate disruption to commerce, and worst of all, likely loss of human life. This is truly a brutal system that we are looking at and needs to be taken seriously.”

The forecast includes an updated threat matrix it classifies as “extreme risk” for conditions expected Wednesday and Thursday, including increased wind gusts, a flood watch that now includes the entire Bay Area and an added forecast Friday through Sunday after the big storm for roughly 1-2 inches of rain in most areas. Wednesday through Thursday morning will be the worst of the storm, with heavy rain and strong winds with gusts of 35-55 mph in most areas, with stronger gusts at higher elevations.

The flood watch will be in effect from Wednesday morning through Thursday afternoon, with rain amounts expected from 2-4 inches in the valleys, 3-6 inches in the foothills and 8-10 inches in the coastal mountains. The updated forecast includes increased rain totals for several areas from the previous forecast issued Sunday: San Rafael (4-6 inches, up from 3-4 inches); San Jose (2-3 inches, up from 1.5-2 inches); Livermore (2-3 inches, up from 1.5-2 inches); Stockton (2-3 inches, up from 1.5-2 inches); and Hollister (2-3 inches, up from 1.5-2 inches). Meanwhile, Santa Rosa is expected to receive between 2.5-4.75 inches between Wednesday and Thursday afternoon.

On Monday, the city announced that a flood watch will begin late Tuesday evening, asking residents to prepare an evacuation plan. City officials urged residents in the range of the 2020 Glass Fire burn scare area to be especially careful as their homes are at higher risk for flash floods, mudflows, and debris flows during intense rainfall. Two areas on the coast south of San Francisco may see slightly less rain than first forecast. The revised forecast is for 2-3 inches of rain in Half Moon Bay — down from 3-4 inches — and for 3-4 inches in Santa Cruz instead of 4-6 inches in the previous forecast. Tuesday is expected to have little to no rain for the region and represents the last opportunity to clean up from Saturday’s storm before the next one hits, forecasters said. For the latest forecast updates, visit weather.gov/bayarea.

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