Weakening storm could bring showers to Marin – Marin Independent Journal

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A storm directed toward the Bay Area has lost momentum and should bring only light rain to Marin, forecasters said.

An “atmospheric river” event that began flooding the Pacific Northwest early Monday is expected to plunge south, but will weaken along the way, according to the National Weather Service. It is expected to start reaching North Bay on Thursday before moving inland and south towards the Central Coast.

The storm could stall in North Bay by noon Thursday, bringing “a rotating cold front” to the west coast, meteorologist Drew Peterson said. Light showers are also possible from Thursday evening to Friday. A second pulse of moisture is expected Friday afternoon through Saturday morning, possibly bringing “random rain showers,” he said.

The overall wet wave could mean around 0.25 inches of rain in some communities in Marin. Higher western areas, such as the Point Reyes and Inverness National Seashore, could experience about a third of an inch. High-altitude locations such as Mount Tamalpais could receive up to three-quarters of an inch of rain, he said.

Marin is expected to experience overnight lows of around 45 degrees, with daytime highs in the mid-50s. Temperatures will cool again over the weekend as the front recedes, with overnight lows potentially dipping into the upper 30s, said Peterson.

“We’re not expecting a lot of wind before the storm arrives,” Peterson said. “But what we’re expecting are fairly gusty winds coming in from the north behind the storm system for Friday afternoon.”

California has seen below-average rainfall since the start of the new year in what would typically be the state’s wettest time, posing a problem for year-round wildfire risk and the state water supply.

Atmospheric river storms in October and December filled the Sierra Nevada snowpack to 168% of normal on New Year’s Day. As of Monday, the Sierra’s snowpack had fallen to 64% of normal, according to the California Department of Water Resources.

Climatologist Daniel Swain posted on social media that the Bay Area should expect “drier than average” conditions for the next few weeks through mid-March.

The January through February period was the driest on record “in much of northern and central California,” he said.

The Bay Area News Group contributed to this report.

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