203 FNUS85 KVEF 101313 FWLVEF ECCDA DISCUSSIONS NATIONAL WEATHER SERVICE LAS VEGAS NV 613 AM PDT THU OCT 10 2019 ##################################################################### ## ## ## DISCUSSIONS FROM THE LATEST FWF BELOW ## ## ## ##################################################################### ...DISCUSSION FROM RNOFWFVEF... STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY WILL BE SEEN TODAY LEADING TO CRITICAL FIRE WEATHER CONCERNS. TEMPERATURES ARE EXPECTED TO BE SIGNIFICANTLY COOLER TODAY THAN WEDNESDAY, BUT HUMIDITY VALUES ARE EXPECTED TO REMAIN LOW. WINDS WILL DIMINISH OVER MOST AREAS LATE THIS AFTERNOON, BUT ARE EXPECTED TO REMAIN STRONG DOWN THE COLORADO RIVER VALLEY THOUGH AT LEAST MID DAY FRIDAY. AS A RESULT, A RED FLAG WARNING HAS BEEN ISSUED FOR THE LOWER COLORADO RIVER VALLEY WHICH INCLUDES CA 229. THE RED FLAG WARNING WILL BE IN EFFECT THROUGH 11AM FRIDAY. ...DISCUSSION FROM LAXFWFSGX... STRONG NORTH-TO-NORTHEAST WINDS WILL DEVELOP ACROSS THE AREA TODAY, REACHING SAN DIEGO COUNTY BY TONIGHT AND CONTINUING INTO FRIDAY. THE COMBINATION OF STRONG WIND AND LOW RELATIVE HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS AT TIMES THURSDAY AND FRIDAY. LOWEST DAYTIME HUMIDITY WILL BE 5 TO 10 PERCENT WITH POOR OVERNIGHT RECOVERY. VERY LOW RELATIVE HUMIDITY WILL CONTINUE INTO SATURDAY, BUT WITH WEAKER AND MORE LOCALIZED WINDS. THERE WILL BE A SLOW RECOVERY IN HUMIDITY FOR SUNDAY AND MONDAY AS THE ONSHORE FLOW SLOWLY INCREASES. ...DISCUSSION FROM PHXFWFPSR... FIRE WEATHER WILL BE VERY PROBLEMATIC TODAY, PARTICULARLY IN SOUTHEAST CALIFORNIA AND WESTERN ARIZONA, AS A DRY COLD FRONT WILL BRING DRY AND VERY WINDY CONDITIONS. WIND GUSTS AS STRONG AS 35 MPH ARE VERY LIKELY, WITH SOME STRONGER GUSTS ALSO POSSIBLE. WINDS ACROSS SOUTH-CENTRAL ARIZONA WILL BE A LITTLE WEAKER BUT GUSTS ACROSS THE HIGHER ELEVATED AREAS AND RIDGETOPS MAY EXCEED 30 MPH. DAYTIME MINIMUM RELATIVE HUMIDITY VALUES WILL DROP WELL BELOW 15% (AS LOW AS 5 PERCENT ACROSS SOUTHEAST CALIFORNIA/WESTERN ARIZONA), BUT REMAIN SLIGHTLY HIGHER (15-20%) ACROSS THE HIGHER ELEVATED FORESTED AREAS IN AND AROUND THE TONTO NF. OVERNIGHT RH RECOVERIES WILL INCREASE JUST INTO THE 15-25% RANGE. THE WINDS WILL BE MUCH LESS FRIDAY BUT THE RH VALUES WILL NOT IMPROVE. ##################################################################### ## ## ## AFTER REVIEWING THE FWF DISCUSSIONS (ABOVE) - COMPLETE ## ## THE DISCUSSION (BELOW) FOR THE ECCDA FORECAST ## ## WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KVEFFWLVEF ## ## ## ##################################################################### ECC027-110715- SAN BERNARDINO ECC DISPATCH- DISCUSSION FOR SAN BERNARDINO ECC DISPATCH 613 AM PDT THU OCT 10 2019 STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY WILL BE SEEN TODAY LEADING TO CRITICAL FIRE WEATHER CONCERNS. TEMPERATURES ARE EXPECTED TO BE SIGNIFICANTLY COOLER TODAY THAN WEDNESDAY, BUT HUMIDITY VALUES ARE EXPECTED TO REMAIN LOW. WINDS WILL DIMINISH OVER MOST AREAS LATE THIS AFTERNOON, BUT ARE EXPECTED TO REMAIN STRONG DOWN THE COLORADO RIVER VALLEY THOUGH AT LEAST MID DAY FRIDAY. AS A RESULT, A RED FLAG WARNING HAS BEEN ISSUED FOR ALL OF THE SOUTHERN NV ZONES INCLUDING ZONES 460, 461, 462, 463, 464 AND 465, AS WELL AS THE LOWER COLORADO RIVER VALLEY WHICH INCLUDES AZ 101, NV 466 AND CA 229. THE RED FLAG WARNING WILL BE IN EFFECT THROUGH 5PM TODAY FOR SOUTHERN NV ZONES. BECAUSE OF THE ELEVATED WINDS DOWN THE COLORADO RIVER, THE RED FLAG WARNING WILL REMAIN IN EFFECT THROUGH 11AM FRIDAY. $$