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WGUS66 KSGX 311945
FFASGX
FLOOD WATCH
NATIONAL WEATHER SERVICE SAN DIEGO CA
1145 AM PST WED DEC 31 2025
CAZ048-055-057-552-554-010615-
/O.CON.KSGX.FA.A.0008.260101T0600Z-260102T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SAN
BERNARDINO COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
ORANGE COUNTY COASTAL AREAS-ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF LAKE ARROWHEAD, FONTANA, COSTA MESA,
NEWPORT BEACH, RANCHO CUCAMONGA, FULLERTON, SAN BERNARDINO,
MISSION VIEJO, LAGUNA BEACH, WRIGHTWOOD, BIG BEAR LAKE,
RIVERSIDE, IRVINE, SANTA ANA, ANAHEIM, SAN CLEMENTE, RUNNING
SPRINGS, GARDEN GROVE, BIG BEAR CITY, ONTARIO, HUNTINGTON BEACH,
ORANGE, MORENO VALLEY, CORONA, AND CRESTLINE
1145 AM PST WED DEC 31 2025
...FLOOD WATCH REMAINS IN EFFECT FROM 10 PM PST THIS EVENING THROUGH
THURSDAY EVENING...
* WHAT...FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE.
* WHERE...A PORTION OF SOUTHWEST CALIFORNIA, INCLUDING THE FOLLOWING
AREAS, ORANGE COUNTY COASTAL AREAS, ORANGE COUNTY INLAND AREAS,
SAN BERNARDINO COUNTY MOUNTAINS, SAN BERNARDINO AND RIVERSIDE
COUNTY VALLEYS-THE INLAND EMPIRE AND SANTA ANA MOUNTAINS AND
FOOTHILLS.
* WHEN...FROM 10 PM PST THIS EVENING THROUGH THURSDAY EVENING.
* IMPACTS...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. LOW-WATER
CROSSINGS MAY BE FLOODED. MINOR FLOODING AND DEBRIS FLOWS POSSIBLE
IN AND BELOW RECENT BURN SCARS.
* ADDITIONAL DETAILS...
- A WARM LOW PRESSURE SYSTEM FROM THE SOUTHWEST WILL BRING
PERIODS OF MODERATE TO LOCALLY HEAVY PRECIPITATION TONIGHT
THROUGH THURSDAY EVENING. THE HEAVIEST SHOWERS ARE LIKELY TO
OCCUR THURSDAY MORNING. HIGH SOIL MOISTURE FROM LAST WEEK'S
HEAVY RAINFALL AND WILL EXACERBATE THE FLOODING THREAT IN THE
WATCH AREA.
- HTTPS://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.
BE ALERT IN THE MOUNTAINS FOR ROCKSLIDES AND ROCKS IN THE ROAD.
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