Walnut Creek Under Flood Watch As Atmospheric River Pounds Bay Area

WALNUT CREEK, CA —A National Weather Service flood watch for Walnut Creek and the East Bay is expected to remain in effect through 4 a.m. Wednesday.

"You should monitor later forecasts and be alert for possible Flood Warnings," the weather service said. "Those living in areas prone to flooding should be prepared to take action should flooding develop."

Initial rain late last week and over the weekend helped saturate soils and prime portions of the Bay Area for increase flooding potential as an atmospheric river moves through.

"Flooding caused by excessive rainfall continues to be possible," the weather service said. "Excessive runoff may result in flooding of rivers, creeks, streams and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas."

The flood watch encompasses the counties of Sonoma, Napa, Marin, San Francisco, San Mateo, Contra Costa, Alameda, Santa Clara, Santa Cruz, San Benito and Monterey, and the cities of Oakland, Pacifica, Tamalpais-Homestead, Marina, San Francisco, Santa Cruz, Monterey, Antioch, Cordoza Ridge, Pittsburg, Rohnert Park, King City, San Jose, Scotts Valley, Live Oak, Blackhawk, Novato, Napa, South Santa Rosa, Berkeley, Petaluma, Boulder Creek, Concord, Angwin, Seaside, Lagunitas-Forest Knolls, Santa Rosa, Watsonville, Daly City, Day Valley, Hayward, Pleasanton, Salinas, Fremont, Greenfield, Livermore, Sausalito, San Ramon, San Rafael, Walnut Creek and Woodacre.

The weather service also issued a wind advisory for the East Bay and Bay Area until 11 p.m. Tuesday. South winds 20-30 mph with gusts up to 60 mph are forecast.

7-Day Weather Outlook For Walnut Creek

Tuesday

Rain before 10am, then showers between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. High near 60. Breezy, with a south southeast wind 14 to 19 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Tuesday Night
Showers and possibly a thunderstorm before 7pm, then showers between 7pm and 10pm. Low around 36. West wind 7 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday
Sunny, with a high near 55. South wind 5 to 7 mph becoming calm.

Wednesday Night
Rain after 4am. Low around 36. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Thursday
Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night
Rain, mainly before 4am. Low around 41. Chance of precipitation is 90%.

Friday
A chance of rain before 10am. Mostly sunny, with a high near 55.

Friday Night
Mostly clear, with a low around 33.

Saturday
Sunny, with a high near 55.

Saturday Night
Clear, with a low around 33.

Sunday
Sunny, with a high near 57.

Sunday Night
Mostly clear, with a low around 35.

Monday
Sunny, with a high near 58.