476  
FGUS76 KSTO 241914  
ESFSTO  
CAC003-005-007-009-011-017-021-057-061-063-067-077-089-091-095-  
099-101-103-109-113-115-252000-  
 
HYDROLOGIC OUTLOOK  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
1114 AM PST SAT DEC 24 2022  
 
...MODERATE TO HEAVY RAIN WILL LIKELY CAUSE SOME URBAN AND SMALL  
STREAM FLOODING LATE MONDAY THROUGH TUESDAY...  
 
* WHAT...A SIGNIFICANT WINTER STORM WILL IMPACT THE REGION LATE  
MONDAY AND TUESDAY, WITH SHOWERS LINGERING INTO WEDNESDAY. THIS  
POTENT SYSTEM IS TAPPING INTO A VERY MOIST SUBTROPICAL PLUME,  
WHICH WILL ALLOW FOR MODERATE, TO PERIODS OF HEAVY,  
PRECIPITATION. PRECIPITATION WILL BEGIN IN THE NORTHERN AREAS  
MONDAY EVENING, BECOMING MODERATE TO HEAVY MONDAY NIGHT, THEN  
SPREAD SOUTH ACROSS THE REGION EARLY ON TUESDAY. RAINFALL TOTALS  
WILL RANGE FROM 1.25 TO 2.5 INCHES IN THE VALLEY, WITH FOOTHILLS  
AND MOUNTAINS RECEIVING 3 TO 5 INCHES. LOCALLY UP TO 8 INCHES  
ARE POSSIBLE OVER FAVORED PEAKS AND HIGHER TERRAIN. MODERATE TO  
HEAVY RAIN WILL LEAD TO RAPID RISES OF AREA RIVERS, STREAMS, AND  
CREEKS. LOCALIZED PONDING OF WATER FOR LOW-LYING OR POORLY  
DRAINED AREAS AS WELL AS LOCALIZED FLOODING IS POSSIBLE DUE TO  
BLOCKED DRAINAGES, AND STORM DRAINS. MAIN STEM RIVERS ARE  
PRESENTLY FORECAST TO REMAIN BELOW FLOOD STAGE, BUT MAY RISE  
ABOVE MONITOR STAGE IN A FEW LOCATIONS.  
 
* WHERE...INTERIOR NORTHERN CALIFORNIA  
 
* WHEN...MONDAY NIGHT THROUGH TUESDAY WITH GREATEST IMPACTS  
EXPECTED EARLY TUESDAY. SHOWERS WILL LINGER THROUGH WEDNESDAY,  
WITH RUNOFF EXPECTED TO CONTINUE.  
 
* ADDITIONAL DETAILS...THERE IS A CONCERN FOR MINOR MUD, ROCK, AND  
DEBRIS FLOWS THAT MAY OCCUR ACROSS BURN AREAS. IN ADDITION,  
STRONG AND GUSTY WINDS ARE EXPECTED LATE MONDAY NIGHT AND  
TUESDAY. DEBRIS FROM GUSTY WINDS MAY CAUSE DRAINAGE BLOCKAGES  
WHICH COULD CREATE A LOCALIZED FLOODING THREAT. LOCALIZED  
PONDING OF WATER IS LIKELY IN LOW-LYING OR POORLY DRAINED AREAS,  
SUCH AS FREEWAY OFF RAMPS. NO MAINSTEM RIVER FLOODING IS  
FORECAST AT THIS TIME, BUT MAINSTREAM RIVERS WILL SEE RAPID  
RISES, AND MAY REACH MONITOR STAGE IN A FEW PLACES. MORE STORMS  
LOOK LIKELY LATE NEXT WEEK AND INTO THE EARLY PART OF THE NEW  
YEAR. PLEASE MONITOR THE LATEST FORECAST FOR THE MOST UP TO DATE  
WEATHER INFORMATION.  
 
 
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