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Tuesday, October 25, 2011

RED FLAG WARNING IN EFFECT SAN FRANCISCO BAY AREA

RED FLAG WARNING
 DRY NORTHERLY WINDS WILL DEVELOP TONIGHT ACROSS THE NORTH AND EAST BAY HILLS AND MARIN/SONOMA AND NAPA COUNTIES. THE AREA OF STRONGEST WINDS WILL BE THE HILLS OF NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.
 
 STRONGEST WINDS WILL OCCUR AFTER MIDNIGHT TONIGHT THROUGH ABOUT MIDDAY WEDNESDAY. HOWEVER DRY OFFSHORE WINDS WITH VERY LOW HUMIDITY WILL CONTINUE AGAIN WEDNESDAY NIGHT THROUGH SUNRISE THURSDAY, ESPECIALLY IN THE EAST BAY HILLS

RED FLAG WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH BAY HILLS ABOVE 1000 FEET IN MARIN/SONOMA AND NAPA COUNTIES... 

AFFECTED AREA: HILLS ABOVE 1000 FEET IN MARIN/SONOMA AND NAPA COUNTIES. THE AREA OF STRONGEST WINDS WILL BE THE HILLS OF NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.
WINDS: NORTH TO NORTHEAST WINDS SUSTAINED 15 TO 25 MPH WITH FREQUENT GUSTS 35 TO 40 MPH. STRONGEST WINDS WILL OCCUR LATE TONIGHT THROUGH MIDDAY WEDNESDAY. 
RELATIVE HUMIDITY: DROPPING BELOW 30 PERCENT TONIGHT AND THEN STAYING BETWEEN 15 AND 25 PERCENT WEDNESDAY THROUGH THURSDAY WITH NO NIGHT TIME RECOVERY. 
IMPACTS: ANY IGNITIONS DURING THE PERIOD OF STRONGEST WINDS COULD LEAD TO NEW FIRE STARTS THAT WILL BE DIFFICULT TO SUPPRESS WITH RAPID RATES OF SPREAD.

Instruction: A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS... LOW RELATIVE HUMIDITY... AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.
Area: NORTH BAY MOUNTAINS-MARIN/SONOMA AND NORTHERN AND EASTERN NAPA COUNTY AS WELL AS AROUND MOUNT ST HELENA.
Affected Counties or parts of: San Francisco, Santa Cruz, San Mateo, Marin, Monterey, Contra Costa, Napa, San Benito, Sonoma, Santa Clara, Alameda

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****REMINDER**** Every fire has the ability to be catastrophic. The wildland fire management environment has profoundly changed. Growing numbers of communities, across the nation, are experiencing longer fire seasons; more frequent, bigger, and more severe, fires are a real threat. Be careful with all campfires and equipment.
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