496
WGUS66 KSGX 012016
FFASGX
FLOOD WATCH
NATIONAL WEATHER SERVICE SAN DIEGO CA
1216 PM PST THU JAN 1 2026
CAZ048-055-057-552-554-020600-
/O.CON.KSGX.FA.A.0008.000000T0000Z-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 WRIGHTWOOD, ONTARIO, SAN BERNARDINO,
IRVINE, MISSION VIEJO, RANCHO CUCAMONGA, FULLERTON, ORANGE,
RIVERSIDE, BIG BEAR CITY, MORENO VALLEY, LAKE ARROWHEAD, LAGUNA
BEACH, CRESTLINE, SAN CLEMENTE, FONTANA, RUNNING SPRINGS,
HUNTINGTON BEACH, NEWPORT BEACH, BIG BEAR LAKE, COSTA MESA,
GARDEN GROVE, CORONA, SANTA ANA, AND ANAHEIM
1216 PM PST THU JAN 1 2026
..FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS 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...UNTIL 10 PM PST THIS 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 THROUGH
THURSDAY EVENING. THE HEAVIEST SHOWERS OCCURRED THIS 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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