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Tuesday, November 1, 2011

RED FLAG WARNING - NORTH BAY MOUNTAINS / EAST BAY HILLS / DIABLO RANGE

RED FLAG WARNING
 RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 AM PDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH AND EAST BAY HILLS.
STRONG NORTHERLY WINDS ARE ALREADY DEVELOPING ACROSS THE NORTH AND EAST BAY HILLS EARLY THIS MORNING. NORTH TO NORTHEAST WINDS WILL CONTINUE TO INCREASE THROUGH THE DAY AS HUMIDITY VALUES  CONTINUE TO DRY OUT. THE STRONGEST WINDS WILL END BY THIS EVENING  BUT VERY DRY AIR WILL STAY IN PLACE AT LEAST THROUGH WEDNESDAY MORNING


 AFFECTED AREA: THE NORTH AND EAST BAY HILLS ABOVE 1000 FEET. THE STRONGEST WINDS WILL INITIALLY ARRIVE IN THE NAPA COUNTY HILLS EARLY THIS MORNING AND THEN SPREAD INTO THE EAST BAY HILLS DURING THE MID-MORNING HOURS. BY THIS AFTERNOON THE OFFSHORE WINDS WILL REACH THE COASTAL HILLS OF MARIN AND SONOMA COUNTY. 
WINDSNORTH 15 TO 25 MPH WITH FREQUENT GUSTS 35 TO 40 MPH.  
RELATIVE HUMIDITY: 30 TO 40 PERCENT AT SUNRISE... LOWERING 12 TO  25 PERCENT THROUGH THE DAY WITH LITTLE OR NO HUMIDITY RECOVERY TONIGHT.
IMPACTS: ANY FIRE STARTS DURING THE PERIOD OF STRONG WINDS AND LOW HUMIDITY WILL BE DIFFICULT TO SUPPRESS WITH RAPID RATES OF SPREAD. PRESCRIBED AND BACKYARD BURNERS SHOULD USE EXTREME CAUTION DURING THIS RED FLAG EVENT. 


PRECAUTIONARY/PREPAREDNESS ACTIONS
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 / EAST BAY HILLS AND DIABLO RANGE
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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