GFMC: Bush and Forest Fires, USA
Red Flag Warning/Fire Weather Watch (Extreme Southwestern California
27 Oktober 2003
RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
345 PM PST SUN OCT 26 2003
ORANGE COUNTY-SAN DIEGO COUNTY INLAND VALLEYS-SAN BERNARDINO AND
RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SAN BERNARDINO COUNTY
MOUNTAINS-THE RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND
FOOTHILLS-SAN DIEGO COUNTY MOUNTAINS-
…A RED FLAG WARNING REMAINS IN EFFECT THROUGH 200 PM MONDAY
AFTERNOON FOR VERY LOW HUMIDITIES AND FOR SANTA ANA WINDS…
THIS RED FLAG WARNING IS FOR NORTHEAST WINDS OF 20 TO 35 MPH WITH
LOCAL GUSTS TO 45 TO 55 MPH NEAR PASSES AND CANYONS THROUGH TONIGHT
AND MONDAY MORNING. AFTER THE STRONGEST GUSTS TODAY…THE SANTA ANA
WINDS WILL CONTINUE BUT AT SOMEWHAT LOWER SPEEDS TONIGHT INTO MONDAY
MORNING. IN ADDITION…SUSTAINED RELATIVE HUMIDITIES WILL BE LESS
THAN 10 PERCENT IN MANY LOCATIONS THROUGH MONDAY.
THE WARNING AREA INCLUDES ALL OF THE MOUNTAINS AND INLAND
VALLEYS…AND ORANGE COUNTY.
.DISCUSSION…
NORTHEAST WINDS WERE AT THEIR PEAK LEVELS THIS MORNING AND EARLY
THIS AFTERNOON…ESPECIALLY NEAR THE PASSES…CANYONS AND NEAR THE
WILDFIRES. PRESSURE GRADIENTS WILL GRADUALLY DECREASE AND BRING A
SLOW DROPOFF IN THE WINDS THROUGH MONDAY…HOWEVER LOCAL GUSTY
NORTHEAST TO EAST WINDS WILL CONTINUE TO IMPACT AREAS NEAR CANYONS…
PASSES AND ONGOING WILDFIRES.
SUSTAINED RELATIVE HUMIDITIES WILL PERSIST BELOW 10 PERCENT IN MANY
AREAS…ESPECIALLY IN THE FOOTHILLS AND MOUNTAINS WITH CRITICALLY
LOW FUEL MOISTURES AND VERY POOR HUMIDITY RECOVERY AT NIGHT. THE
COASTAL SECTIONS WILL ALSO EXPERIENCE LOW HUMIDITIES DUE TO THE
SANTA ANA WINDS.
THE SANTA ANA WINDS WILL SLOWLY SUBSIDE MONDAY AFTERNOON AS THE HIGH
PRESSURE OVER THE GREAT BASIN WEAKENS. A COOLING TREND AND GRADUAL
HUMIDITY RECOVERY WILL TAKE PLACE THROUGH THE END OF THE WEEK.
LAVIS
Source: NWSFO
