FNUS85 KVEF 121217

FWLVEF



ECCDA DISCUSSIONS

NATIONAL WEATHER SERVICE LAS VEGAS NV

417 AM PST FRI DEC 12 2025



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##            DISCUSSIONS FROM THE LATEST FWF BELOW                ##

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...DISCUSSION FROM RNOFWFVEF...



DRY CONDITIONS WILL PERSIST ACROSS THE REGION  THROUGH THE WEEKEND.

RELATIVE HUMIDITY VALUES ARE EXPECTED TO FALL TO BETWEEN 15 AND

30 PERCENT EACH AFTERNOON, WITH OVERNIGHT  VALUES RECOVERING TO

BETWEEN 30 AND 60 PERCENT. TEMPERATURES WILL  CONTINUE TO RUN WARMER

THAN NORMAL, WITH READINGS APPROACHING  RECORD LEVELS TODAY BEFORE

DECREASING A FEW DEGREES OVER THE  WEEKEND, THOUGH STILL REMAINING

ABOVE NORMAL. 





...DISCUSSION FROM LAXFWFSGX...





THROUGH SUNDAY, WEAK ONSHORE FLOW AND A SLOWLY DEEPENING MARINE

LAYER WILL SPREAD COOLING AND HIGHER COASTAL HUMIDITY INLAND, BUT

WITH SUNDAY HIGH TEMPERATURES STILL 12 TO 18 DEGREES ABOVE AVERAGE

FOR THE INLAND VALLEYS AND LOWER COASTAL SLOPES OF THE MOUNTAINS.

MUCH WARMER AIR IN THE TEMPERATURE INVERSION ABOVE THE MARINE  LAYER

WILL KEEP OVERNIGHT TEMPERATURES WARMER INTO EARLY NEXT WEEK IN THE

FAR INLAND VALLEYS ONTO THE LOWER COASTAL SLOPES OF THE  MOUNTAINS

FOR ELEVATIONS FROM 2000 TO AROUND 4000 FEET. FOR MONDAY INTO

TUESDAY, THERE WILL BE WEAK OFFSHORE FLOW WITH INLAND  DRYING. FOR

WEDNESDAY, STRONGER ONSHORE FLOW WILL SPREAD COOLING  OF AROUND

5 DEGREES INLAND WITH NOT MUCH CHANGE ON THURSDAY. 





...DISCUSSION FROM PHXFWFPSR...





STRONG HIGH PRESSURE WILL CONTINUE TO DOMINATE ACROSS THE REGION

THROUGH AT LEAST THE WEEKEND BRINGING UNSEASONABLY WARM AND DRY 

CONDITIONS. HIGH TEMPERATURES IN THE UPPER 70S TO THE LOWER 80S WILL

BE COMMON ACROSS THE LOWER DESERTS, OR AT LEAST 10 DEGREES ABOVE

NORMALS. WINDS WILL CONTINUE TO FOLLOW FAMILIAR DIURNAL  TRENDS WITH

OCCASIONAL AFTERNOON UPSLOPE BREEZINESS. DAILY MINRHS  WILL BE

BETWEEN 20-25% WHILE OVERNIGHT RECOVERIES RUN GENERALLY  BETWEEN

45-75%.





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##      AFTER REVIEWING THE FWF DISCUSSIONS (ABOVE) - COMPLETE     ##

##      THE DISCUSSION (BELOW) FOR THE ECCDA FORECAST              ##

##      WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KVEFFWLVEF       ##

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ECC027-130630-

SAN BERNARDINO ECC DISPATCH-

DISCUSSION FOR SAN BERNARDINO ECC DISPATCH

417 AM PST FRI DEC 12 2025



DRY CONDITIONS WILL PERSIST ACROSS THE REGION THROUGH THE 

WEEKEND. RELATIVE HUMIDITY VALUES ARE EXPECTED TO FALL TO BETWEEN 

15 AND 30 PERCENT EACH AFTERNOON, WITH OVERNIGHT VALUES RECOVERING

TO BETWEEN 30 AND 60 PERCENT. TEMPERATURES WILL CONTINUE TO RUN 

WARMER THAN NORMAL, WITH READINGS APPROACHING RECORD LEVELS TODAY 

BEFORE DECREASING A FEW DEGREES OVER THE WEEKEND, THOUGH STILL 

REMAINING ABOVE NORMAL. 



$$