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Friday, November 22, 2013

NWS: Red Flag Warnings North SF Bay Area Interior Valleys and Mountains #CaFire #CaWx

URGENT - FIRE WEATHER MESSAGE RED FLAG WARNING - NORTH BAY INTERIOR VALLEYS AND NORTH BAY MOUNTAINS -

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 CAN
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
712 PM PST FRI NOV 22 2013

...VERY DRY AND WINDY CONDITIONS WILL CONTINUE ACROSS THE NORTH
BAY THROUGH SATURDAY MORNING..

.STRONG AND GUSTY NORTHEAST WINDS CONTINUED ACROSS THE NORTH BAY
ON FRIDAY EVENING. WINDS ARE EXPECTED TO REMAIN STRONG THROUGH
FRIDAY NIGHT WITH RIDGE TOP GUSTS UP TO 50 MPH. IN ADDITION...VERY
DRY AIR WILL REMAIN OVER THE AREA AND LITTLE OR NO HUMIDITY
RECOVERY IS EXPECTED ON FRIDAY NIGHT. WINDS WILL GRADUALLY SUBSIDE
DURING THE DAY ON SATURDAY...BUT VERY DRY CONDITIONS WILL PERSIST.
WINDS WILL BE LIGHT BY SATURDAY EVENING AND HUMIDITY RECOVERIES ON
SATURDAY NIGHT ARE EXPECTED TO BE MUCH BETTER.

CAZ506-507-231400-
/O.NEW.KMTR.FW.W.0006.131123T0312Z-131124T0100Z/
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
712 PM PST FRI NOV 22 2013

...RED FLAG WARNING IN EFFECT UNTIL 5 PM PST SATURDAY FOR GUSTY
OFFSHORE WINDS AND LOW HUMIDITY FOR THE NORTH BAY MOUNTAINS AND
VALLEYS..

THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS ISSUED A
RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 5 PM PST SATURDAY.

* AFFECTED AREA: FIRE ZONE 506 NORTH BAY INTERIOR VALLEYS..
  FIRE ZONE 507 NORTH BAY MOUNTAINS.

* TIMING: FRIDAY NIGHT THROUGH SATURDAY AFTERNOON. STRONGEST WINDS
  EXPECTED ON FRIDAY NIGHT...GRADUALLY DIMINISHING ON SATURDAY.

* WIND: NORTHEAST WINDS OF 20 TO 35 MPH WITH GUSTS UP TO 50 MPH
  WILL CONTINUE ON FRIDAY NIGHT. WINDS WILL GRADUALLY SUBSIDE ON
  SATURDAY. BY LATE SATURDAY AFTERNOON WINDS ARE FORECAST TO
  SUBSIDE TO ABOUT 5 TO 15 MPH.

* HUMIDITY: LITTLE OR NO HUMIDITY RECOVERIES EXPECTED FRIDAY
  NIGHT. MAXIMUM HUMIDITY VALUES FROM ABOUT 15 TO 25 PERCENT ABOVE
  1000 FEET AND 25 TO 40 PERCENT IN THE VALLEYS. RELATIVE HUMIDITY
  VALUES IN THE SINGLE DIGITS IN ALL AREAS ON SATURDAY. MUCH
  BETTER HUMIDITY RECOVERIES EXPECTED SATURDAY NIGHT.

* IMPACTS: THE COMBINATION OF DRY FUELS...STRONG WINDS AND LOW
  HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS WHERE
  EXISTING FIRES AND ANY NEW IGNITIONS WILL SEE RAPID FIRE
  GROWTH.

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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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