FNUS86 KSGX 121039

FWLSGX



ECCDA DISCUSSIONS

NATIONAL WEATHER SERVICE SAN DIEGO CA

239 AM PST FRI DEC 12 2025



ECC033-130445-

ORANGE ECC DISPATCH-

DISCUSSION FOR ORANGE ECC DISPATCH

239 AM PST FRI DEC 12 2025



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. 



$$



ECC035-130445-

MONTE VISTA ECC DISPATCH-

239 AM PST FRI DEC 12 2025



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. 



$$



ECC034-130445-

RIVERSIDE ECC DISPATCH-

239 AM PST FRI DEC 12 2025



...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%.



NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND IN

THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.



$$