Wildfire in California, September 1, 2004

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO
900 AM PDT WED SEP 1 2004

.SYNOPSIS...HIGH PRESSURE WILL CONTINUE THE FAIR...DRY...WARM
WEATHER TODAY WITH LATE NIGHT AND EARLY MORNING COASTAL LOW CLOUDS
EXTENDING INLAND INTO THE LOWER COASTAL VALLEYS. UPPER LEVEL LOW
PRESSURE WILL MOVE PAST TO THE NORTH THURSDAY AND FRIDAY BRINGING
GUSTY WINDS TO THE MOUNTAINS AND DESERTS...A DEEPER MARINE LAYER...
AND A COOLING TREND. IT WILL BE WARMER AGAIN THIS WEEKEND AND EARLY
NEXT WEEK AS HIGH PRESSURE REBUILDS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES.

KSOX RADAR IS BEING WORKED ON AND SHOULD BE OPERATING BY AFTERNOON.
UPDATED ZONE FORECAST TO REMOVE THE DENSE FOG ADVISORY THAT WAS
GOING FOR THE COASTAL AREAS FROM 6 TO 8 AM. THE MARINE LAYER
INVERSION WAS ABOUT 900 FT THIS MORNING LIKE YESTERDAY AND THE
CLOUDS WERE LOW ENOUGH TO CAUSE DENSE FOG IN MANY LOCATIONS OF
COASTAL MESAS. IT WILL BE VERY HOT AND DRY AGAIN INLAND. RELATIVE
HUMIDITIES IN THE MTNS ARE LOW ENOUGH TO PROMPT A RED FLAG WARNING.
A LOW PRESSURE TROUGH WILL MOVE THROUGH THE INTERIOR WEST THU AND
FRI. THIS WILL DEEPEN THE MARINE LAYER IN SOCAL AND CLOUDS SHOULD
ARRIVE INTO SOME VALLEYS BY SUNRISE THU...THEN INTO ALL VALLEYS
EARLY FRI MORNING AS A COASTAL EDDY SHOULD BE RAGING. TEMPS WILL GO
WAY DOWN ESPECIALLY INLAND. THE TROUGH MOVES AWAY SAT AND THE
COASTAL CLOUDS WILL NOT BE AS EXTENSIVE THEN. WINDS WILL INCREASE
THU IN THE MTNS AND DESERTS AND CONTINUE FRI. MODELS DEPICT THE
TROUGH STRONGER AND CLOSER TO SOCAL THAN PREVIOUS RUNS
INDICATED...SO WINDS WILL BE STRONG IN THE AFTERNOONS AND EVES OF
BOTH THU AND FRI. OFFSHORE FLOW DEVELOPS SAT AS COLD AIR MOVES INTO
THE GREAT BASIN BUT ONLY LIGHT NORTHERLY BREEZES ARE EXPECTED. THE
MARINE LAYER WILL SHRINK STARTING SAT AND BY SUN WILL PROBABLY NOT
ALLOW CLOUDS INTO THE INLAND VALLEYS AGAIN. TEMPS WILL INCREASE
ACCORDINGLY IN ALL AREAS OVER THE WEEKEND AS THE UPPER HIGH REBUILDS
OFF THE WEST COAST. THAT RIDGE BROADENS BUT CURRENT MODEL RUN DOES
NOT SHOW THE HIGH BUILDING INTO THE FOUR CORNERS NOW AS IN PREVIOUS
RUNS...MEANING NO MONSOON MOISTURE NEXT WEEK ACCORDING TO CURRENT
GUIDANCE. HURRICANE HOWARD IS SPINNING AT 15 DEGREES NORTH...DUE
SOUTH OF CABO AND FORECAST TO MOVE SLOWLY NORTHWEST AND DIE THE NEXT
FEW DAYS. WILL HAVE TO WATCH MOISTURE FROM HIS REMNANTS...BUT WITH
WESTERLY FLOW OVER SOCAL THE MOISTURE WILL STAY TOO FAR SOUTH.

.SGX WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING FOR SAN BERNARDINO MOUNTAINS...LAXRFWSGX.

&&

MM

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE SAN DIEGO CA
1000 AM PDT WED SEP 1 2004

CAZ055-011700-
SAN BERNARDINO COUNTY MOUNTAINS-
1000 AM PDT WED SEP 1 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR
THE MOUNTAIN AREAS OF EXTREME SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY THROUGH TONIGHT.

RED FLAG WARNING FOR LOW RELATIVE HUMIDITIES IN THE SAN BERNARDINO
MOUNTAINS...SEE LAXRFWSGX.

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY.

RED FLAG WARNING WILL LIKELY CONTINUE THURSDAY...OTHERWISE NO
HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

MM