974
WGUS66 KMTR 232357
FFAMTR
FLOOD WATCH
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
357 PM PST TUE DEC 23 2025
CAZ502>506-240800-
/O.CON.KMTR.FA.A.0005.000000T0000Z-251227T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARIN COASTAL RANGE-SONOMA COASTAL RANGE-NORTH BAY INTERIOR
MOUNTAINS-COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL
SEASHORE-NORTH BAY INTERIOR VALLEYS-
INCLUDING THE CITIES OF PETALUMA, NAPA, SAN RAFAEL,
TAMALPAIS-HOMESTEAD, ANGWIN, WOODACRE, SANTA ROSA,
LAGUNITAS-FOREST KNOLLS, SAUSALITO, ROHNERT PARK, NOVATO, AND
SOUTH SANTA ROSA
357 PM PST TUE DEC 23 2025
..FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING
* WHAT...FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE FROM MULTIPLE LINES OF SHOWERS AND THUNDERSTORMS, STRONG
AT TIMES, MOVING ACROSS THE AREA.
* WHERE...NORTHERN SAN FRANCISCO BAY AREA (NAPA, SONOMA, AND MARIN
COUNTIES).
* WHEN...THROUGH FRIDAY EVENING.
* IMPACTS...EXCESSIVE RUNOFF MAY RESULT IN FLOODING OF RIVERS,
CREEKS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS.
CREEKS AND STREAMS MAY RISE OUT OF THEIR BANKS. LOW WATER CROSSINGS
MAY BECOME FLOODED. FLOODING MAY OCCUR IN POOR DRAINAGE AND URBAN
AREAS.
* ADDITIONAL DETAILS...
- MULTIPLE ROUNDS OF MODERATE TO HEAVY RAINFALL ARE EXPECTED ACROSS
THE NORTH BAY THROUGH FRIDAY EVENING. AN ADDITIONAL 3-5" IS
POSSIBLE OVER THE NORTH BAY MOUNTAINS AND 2-3" OVER THE NORTH BAY
VALLEYS BY FRIDAY. NUISANCE FLOODING WILL INCREASE THROUGHOUT THE
WEEK WITH SHARP RISES IN SMALLER CREEKS AND MINOR FLOODING ALONG
SOME OF THE MAINSTREAM RIVERS (RUSSIAN RIVER, NAPA RIVER). DEBRIS
FLOWS ARE POSSIBLE PARTICULARLY FOR THE PICKETT BURN SCAR.
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD 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.
CAZ006-508>510-512>518-528>530-240800-
/O.CON.KMTR.FA.A.0005.000000T0000Z-251227T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN FRANCISCO-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 HAYWARD, SAN JOSE, SAN FRANCISCO, FREMONT,
BERKELEY, PLEASANTON, WALNUT CREEK, GREENFIELD, LIVE OAK, PACIFICA,
WATSONVILLE, DALY CITY, CONCORD, DAY VALLEY, MARINA, SANTA CRUZ,
SCOTTS VALLEY, BLACKHAWK, SEASIDE, CORDOZA RIDGE, OAKLAND, KING CITY,
MONTEREY, ANTIOCH, LIVERMORE, SALINAS, PITTSBURG, SAN RAMON, AND
BOULDER CREEK
357 PM PST TUE DEC 23 2025
..FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING
* WHAT...FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE.
* WHERE...SAN FRANCISCO COUNTY, SAN MATEO PENINSULA, EAST BAY, SOUTH
BAY, AND CENTRAL COAST
* WHEN...THROUGH FRIDAY EVENING.
* IMPACTS...EXCESSIVE RUNOFF MAY RESULT IN FLOODING OF RIVERS,
CREEKS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS.
CREEKS AND STREAMS MAY RISE OUT OF THEIR BANKS. LOW WATER CROSSINGS
MAY BECOME FLOODED. FLOODING MAY OCCUR IN POOR DRAINAGE AND URBAN
AREAS.
* ADDITIONAL DETAILS...
- NUMEROUS LINES OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE
BAY AREA AND CENTRAL COAST THROUGH FRIDAY EVENING. AN ADDITIONAL
2-4" OF RAIN IS EXPECTED ACROSS THE INTERIOR WITH LOCALLY HIGHER
TOTALS BETWEEN 3-5" ACROSS THE SANTA CRUZ MOUNTAINS AND UP TO 6"
ACROSS THE SANTA LUCIA RANGE. FLOODING POTENTIAL WILL INCREASE
WITH EACH SUCCESSIVE ROUND OF RAIN. SHARP RISES IN SMALLER CREEKS
AND STREAMS ARE EXPECTED WITH AT LEAST SOME POTENTIAL FOR MINOR
FLOODING IN MAINSTREAM RIVERS.
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD 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.
JM
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