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2/4/2025
WT Staff
 Got water questions? Give us a call at 877-52-WATER (877-529-2837), or email us at info@watertoday.ca
February 4, 2025 1001 am PST
San Francisco residents in flood prone areas prepare to take action
Hazardous Weather Statement issued by NWS San Francisco 847 am Tues Feb 4
FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...
Flooding caused by excessive rainfall continues to be
possible through Sonoma, Napa, Marin, San Francisco, San Mateo, Contra
Costa, Alameda, Santa Clara, Santa Cruz, San Benito, and Monterey
Counties through late tonight.
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. Area creeks and streams are running high and could flood with more heavy rain.
Initial rain over the past few days has helped to saturate soils and prime portions of the Bay Area for increased flooding potential as our next AR moves inland. The next round of moderate to heavy rain is expected Monday into Tuesday which will bring additional flooding concerns to the Central Coast where the heaviest rainfall is likely within the Santa Cruz Mountains and the Santa Lucia Range.
Flood safety tips, here.
Monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Impacting San Francisco-Marin Coastal Range-Sonoma Coastal Range-North Bay
Interior Mountains-Coastal North Bay Including Point Reyes
National Seashore-North Bay Interior Valleys-San Francisco Bay
Shoreline-San Francisco Peninsula Coast-East Bay Interior Valleys-
Santa Cruz Mountains-Santa Clara Valley Including San Jose-
Eastern Santa Clara Hills-East Bay Hills-Southern Salinas
Valley/Arroyo Seco and Lake San Antonio-Santa Lucia Mountains and
Los Padres National Forest-Mountains of San Benito County And
Interior Monterey County including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
Including the cities of Pacifica, Walnut Creek, Daly City, Live
Oak, Blackhawk, Greenfield, Fremont, Pleasanton, South Santa
Rosa, Concord, Monterey, King City, Marina, Oakland,
Tamalpais-Homestead, Cordoza Ridge, Napa, San Francisco, Angwin,
San Rafael, San Jose, Berkeley, Seaside, Petaluma, Sausalito,
Santa Cruz, Novato, Lagunitas-Forest Knolls, Scotts Valley,
Watsonville, Day Valley, San Ramon, Antioch, Santa Rosa, Salinas,
Pittsburg, Livermore, Boulder Creek, Hayward, Rohnert Park, and
Woodacre
Streamflow Situation from the network of US Geological Survey river monitoring stations in California
Central Valley Visalia Municipal Airport is clear and 55 degrees, becoming rainy, up to a tenth of an inch coming during the day, the high 65 F. More rain expected tonight with a thunderstorm possible, up to a quarter of an inch, higher with thunderstorms. Rain again tomorrow, another tenth of an inch during the day Wednesday.
San Francisco remains under flood watch until tonight, currently 53 degrees, the high today 61F. A thunderstorm is possible after 4pm, up to an inch of rain on already saturated ground making for concerning situation for anyone in the flood prone areas. More showers and a possible thunderstorm before 7pm, up to half an inch coming before 10 pm. Watch for local flood news, be prepared to evacuate low areas if required.
Patchy fog in Los Angeles, high 63 with a chance of rain after 4pm, no more than a tenth of an inch. Rain is expected tonight, a quarter of an inch of rain beginning after 10pm The Air Quality alert from yesterday appears to be cancelled. Overcast and 59 degrees in San Diego with patchy fog, almost at the daytime high of 62.
Nine sites record active flooding in the north Tuesday with dozens more in 99th percentile flow levels. Updates are in progress, check the front page map for details. Monitoring stations at the 99th percentile extreme high flows are shown on the front page map in blue, the actively flooding sites in black.
Central coast water levels continue below normal to much below seasonal normal, also rated below normal on the drought map. Los Angeles watershed runs mostly seasonal normal water levels as the risk for mudslides continues, see local road closures, here.
San Diego watershed continues with a mix of normal to much below normal flows. Interior Lahontan and Colorado River watersheds remain mostly below normal, with moderate drought continuing through central San Bernardino County. Adjacent area remains below normal in south Lahontan watershed and Colorado River watershed.
Safe Drinking Water Advisories
California drinking water facilities in compliance with the Safe Drinking Water Act -- 93.5%. Twenty-four of 7417 licensed and active drinking water facilities in California have significant violations as of the latest EPA verified quarter, up five from the last quarter.
See WTCAL.us Serious Violator List, here.
Bottled Water Distribution
Packaged drinking water is available for residents of Los Angeles County areas still under "Do not use" orders.
See Los Angeles County list of the drinking water notices, here. Scroll down to Water Alerts.
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