980  
FNUS86 KSGX 202141  
FWLSGX  
 
ECCDA DISCUSSIONS  
NATIONAL WEATHER SERVICE SAN DIEGO CA  
141 PM PST MON JAN 20 2025  
 
ECC033-211545-  
ORANGE ECC DISPATCH-  
DISCUSSION FOR ORANGE ECC DISPATCH  
141 PM PST MON JAN 20 2025  
 
MODERATE TO STRONG SANTA ANA WINDS WILL CONTINUE THIS AFTERNOON  
THROUGH TUESDAY EVENING, PEAKING IN INTENSITY TONIGHT INTO TUESDAY  
MORNING. WIDESPREAD WIND GUSTS OF 35-55 MPH WILL OCCUR ACROSS THE  
COASTAL SLOPES OF THE MOUNTAINS AND INTO THE ADJACENT VALLEYS, WITH  
LOCAL GUSTS OVER 80 MPH IN THE FAVORED PASSES, CANYONS, AND COASTAL  
SLOPES. NORTHERN AREAS LIKE ORANGE COUNTY AND IN FOOTHILLS OF THE  
INLAND EMPIRE HAVE LIKELY SEEN THEIR HIGHEST WIND SPEEDS OF THIS  
EVENT, THOUGH GUSTY WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON.  
WINDS ARE STILL EXPECTED TO INCREASE ACROSS THE MOUNTAINS AND  
FOOTHILLS OF RIVERSIDE AND SAN DIEGO COUNTIES THIS EVENING THROUGH  
TUESDAY MORNING AS WINDS TURN MORE EASTERLY. A PERIOD OF EXTREME  
FIRE WEATHER CONDITIONS IS LIKELY ACROSS THE COASTAL SLOPES,  
FOOTHILLS, AND ADJACENT VALLEYS IN SAN DIEGO COUNTY TUESDAY MORNING  
DUE TO THE COMBINATION OF WIND GUSTS IN EXCESS OF 50 MPH AND SINGLE  
DIGIT RELATIVE HUMIDITY.  
 
RELATIVE HUMIDITY VALUES HAVE LOWERED NEAR 10-15% THIS AFTERNOON FOR  
SOME AREAS ALONG AND WEST OF THE MOUNTAINS. THERE WILL BE VERY  
LIMITED OVERNIGHT RECOVERIES TONIGHT AS THE WINDS CONTINUE TO BLOW.  
EVEN DRIER AIR WILL MOVE INTO THE AREA BY TUESDAY AFTERNOON WITH  
VALUES LOWERING TO 4-7%, POTENTIALLY REMAINING IN THE SINGLE DIGITS  
IN THE MOUNTAINS AND FOOTHILLS INTO TUESDAY NIGHT WITH POOR RECOVERY  
ELSEWHERE.  
 
SANTA ANA WINDS WILL BE MORE LOCALIZED TO THE MOUNTAINS AND ADJACENT  
VALLEYS BY WEDNESDAY. WINDS WILL STRENGTHEN AGAIN ON WEDNESDAY  
NIGHT INTO THURSDAY MORNING, PROMPTING ANOTHER INCREASED WILDFIRE  
WEATHER RISK. THIS EVENT WILL BE MUCH WEAKER THAN TODAY'S EVENT,  
BUT WINDS MAY LOCALLY GUST TO 60 MPH ACROSS THE MOUNTAINS, NEAR  
45 MPH IN THE FOOTHILLS WITH MODERATE CONFIDENCE. THESE WINDS WILL  
LIKELY WEAKEN BUT CONTINUE INTO FRIDAY. RELATIVE HUMIDITY WILL  
REMAIN IN THE SINGLE DIGITS TO MID TEENS, MAINTAINING NEAR CRITICAL  
TO CRITICAL FIRE WEATHER CONDITIONS THURSDAY, AND ELEVATED TO NEAR  
CRITICAL CONDITIONS ON FRIDAY. CONDITIONS IMPROVE GREATLY SATURDAY  
AND SUNDAY WITH THE RETURN OF ONSHORE FLOW AND A 30-50 PERCENT  
CHANCE OF WETTING RAIN AND MOUNTAIN SNOW.  
 
 
 
ECC035-211545-  
MONTE VISTA ECC DISPATCH-  
141 PM PST MON JAN 20 2025  
 
MODERATE TO STRONG SANTA ANA WINDS WILL CONTINUE THIS AFTERNOON  
THROUGH TUESDAY EVENING, PEAKING IN INTENSITY TONIGHT INTO TUESDAY  
MORNING. WIDESPREAD WIND GUSTS OF 35-55 MPH WILL OCCUR ACROSS THE  
COASTAL SLOPES OF THE MOUNTAINS AND INTO THE ADJACENT VALLEYS, WITH  
LOCAL GUSTS OVER 80 MPH IN THE FAVORED PASSES, CANYONS, AND COASTAL  
SLOPES. NORTHERN AREAS LIKE ORANGE COUNTY AND IN FOOTHILLS OF THE  
INLAND EMPIRE HAVE LIKELY SEEN THEIR HIGHEST WIND SPEEDS OF THIS  
EVENT, THOUGH GUSTY WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON.  
WINDS ARE STILL EXPECTED TO INCREASE ACROSS THE MOUNTAINS AND  
FOOTHILLS OF RIVERSIDE AND SAN DIEGO COUNTIES THIS EVENING THROUGH  
TUESDAY MORNING AS WINDS TURN MORE EASTERLY. A PERIOD OF EXTREME  
FIRE WEATHER CONDITIONS IS LIKELY ACROSS THE COASTAL SLOPES,  
FOOTHILLS, AND ADJACENT VALLEYS IN SAN DIEGO COUNTY TUESDAY MORNING  
DUE TO THE COMBINATION OF WIND GUSTS IN EXCESS OF 50 MPH AND SINGLE  
DIGIT RELATIVE HUMIDITY.  
 
RELATIVE HUMIDITY VALUES HAVE LOWERED NEAR 10-15% THIS AFTERNOON FOR  
SOME AREAS ALONG AND WEST OF THE MOUNTAINS. THERE WILL BE VERY  
LIMITED OVERNIGHT RECOVERIES TONIGHT AS THE WINDS CONTINUE TO BLOW.  
EVEN DRIER AIR WILL MOVE INTO THE AREA BY TUESDAY AFTERNOON WITH  
VALUES LOWERING TO 4-7%, POTENTIALLY REMAINING IN THE SINGLE DIGITS  
IN THE MOUNTAINS AND FOOTHILLS INTO TUESDAY NIGHT WITH POOR RECOVERY  
ELSEWHERE.  
 
SANTA ANA WINDS WILL BE MORE LOCALIZED TO THE MOUNTAINS AND ADJACENT  
VALLEYS BY WEDNESDAY. WINDS WILL STRENGTHEN AGAIN ON WEDNESDAY  
NIGHT INTO THURSDAY MORNING, PROMPTING ANOTHER INCREASED WILDFIRE  
WEATHER RISK. THIS EVENT WILL BE MUCH WEAKER THAN TODAY'S EVENT,  
BUT WINDS MAY LOCALLY GUST TO 60 MPH ACROSS THE MOUNTAINS, NEAR  
45 MPH IN THE FOOTHILLS WITH MODERATE CONFIDENCE. THESE WINDS WILL  
LIKELY WEAKEN BUT CONTINUE INTO FRIDAY. RELATIVE HUMIDITY WILL  
REMAIN IN THE SINGLE DIGITS TO MID TEENS, MAINTAINING NEAR CRITICAL  
TO CRITICAL FIRE WEATHER CONDITIONS THURSDAY, AND ELEVATED TO NEAR  
CRITICAL CONDITIONS ON FRIDAY. CONDITIONS IMPROVE GREATLY SATURDAY  
AND SUNDAY WITH THE RETURN OF ONSHORE FLOW AND A 30-50 PERCENT  
CHANCE OF WETTING RAIN AND MOUNTAIN SNOW.  
 
 
 
ECC034-211545-  
RIVERSIDE ECC DISPATCH-  
141 PM PST MON JAN 20 2025  
   
..DISCUSSION FROM LAXFWFSGX  
 
MODERATE TO STRONG SANTA ANA WINDS WILL CONTINUE THIS AFTERNOON  
THROUGH TUESDAY EVENING, PEAKING IN INTENSITY TONIGHT INTO TUESDAY  
MORNING. WIDESPREAD WIND GUSTS OF 35-55 MPH WILL OCCUR ACROSS THE  
COASTAL SLOPES OF THE MOUNTAINS AND INTO THE ADJACENT VALLEYS, WITH  
LOCAL GUSTS OVER 80 MPH IN THE FAVORED PASSES, CANYONS, AND COASTAL  
SLOPES. NORTHERN AREAS LIKE ORANGE COUNTY AND IN FOOTHILLS OF THE  
INLAND EMPIRE HAVE LIKELY SEEN THEIR HIGHEST WIND SPEEDS OF THIS  
EVENT, THOUGH GUSTY WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON.  
WINDS ARE STILL EXPECTED TO INCREASE ACROSS THE MOUNTAINS AND  
FOOTHILLS OF RIVERSIDE AND SAN DIEGO COUNTIES THIS EVENING THROUGH  
TUESDAY MORNING AS WINDS TURN MORE EASTERLY. A PERIOD OF EXTREME  
FIRE WEATHER CONDITIONS IS LIKELY ACROSS THE COASTAL SLOPES,  
FOOTHILLS, AND ADJACENT VALLEYS IN SAN DIEGO COUNTY TUESDAY MORNING  
DUE TO THE COMBINATION OF WIND GUSTS IN EXCESS OF 50 MPH AND SINGLE  
DIGIT RELATIVE HUMIDITY.  
 
RELATIVE HUMIDITY VALUES HAVE LOWERED NEAR 10-15% THIS AFTERNOON FOR  
SOME AREAS ALONG AND WEST OF THE MOUNTAINS. THERE WILL BE VERY  
LIMITED OVERNIGHT RECOVERIES TONIGHT AS THE WINDS CONTINUE TO BLOW.  
EVEN DRIER AIR WILL MOVE INTO THE AREA BY TUESDAY AFTERNOON WITH  
VALUES LOWERING TO 4-7%, POTENTIALLY REMAINING IN THE SINGLE DIGITS  
IN THE MOUNTAINS AND FOOTHILLS INTO TUESDAY NIGHT WITH POOR RECOVERY  
ELSEWHERE.  
 
SANTA ANA WINDS WILL BE MORE LOCALIZED TO THE MOUNTAINS AND ADJACENT  
VALLEYS BY WEDNESDAY. WINDS WILL STRENGTHEN AGAIN ON WEDNESDAY  
NIGHT INTO THURSDAY MORNING, PROMPTING ANOTHER INCREASED WILDFIRE  
WEATHER RISK. THIS EVENT WILL BE MUCH WEAKER THAN TODAY'S EVENT,  
BUT WINDS MAY LOCALLY GUST TO 60 MPH ACROSS THE MOUNTAINS, NEAR  
45 MPH IN THE FOOTHILLS WITH MODERATE CONFIDENCE. THESE WINDS WILL  
LIKELY WEAKEN BUT CONTINUE INTO FRIDAY. RELATIVE HUMIDITY WILL  
REMAIN IN THE SINGLE DIGITS TO MID TEENS, MAINTAINING NEAR CRITICAL  
TO CRITICAL FIRE WEATHER CONDITIONS THURSDAY, AND ELEVATED TO NEAR  
CRITICAL CONDITIONS ON FRIDAY. CONDITIONS IMPROVE GREATLY SATURDAY  
AND SUNDAY WITH THE RETURN OF ONSHORE FLOW AND A 30-50 PERCENT  
CHANCE OF WETTING RAIN AND MOUNTAIN SNOW.  
 
   
..DISCUSSION FROM PHXFWFPSR  
 
TEMPERATURES SHOULD HOVER CLOSE TO THE SEASONAL NORMAL THROUGH THE  
MIDDLE OF THIS WEEK WITH EXPANSIVE DRY AIR IN PLACE RESULTING IN NO  
CHANCE OF WETTING RAINFALL. MINIMUM AFTERNOON HUMIDITY LEVELS WILL  
GENERALLY BE IN THE 5-15% RANGE THIS WEEK AS DRIER AIR PERSISTS.  
OVERNIGHT RECOVERIES WILL REMAIN POOR OF ONLY 15-30% THROUGH THIS  
WEEK. WHILE SOME GUSTY NORTH WINDS RESULTING IN A PERIOD OF  
ELEVATED FIRE DANGER WILL EXIST TODAY AND TONIGHT FOR THE WESTERN  
DISTRICTS AND SOME HIGHER TERRAIN AREAS OF THE EASTERN DISTRICTS,  
LIGHT WINDS WILL BECOME MORE COMMON OVER THE REMAINDER OF THE REGION  
FOR THE REST OF THE WEEK.  
 
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND IN  
THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.  
 
 
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