Red Flag Warning
Issued by NWS Portland, OR

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WWUS86 KPQR 142010
RFWPQR

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE PORTLAND OR
110 PM PDT SUN SEP 14 2014

...CRITICAL FIRE CONDITIONS THROUGH MONDAY NIGHT...

.A SURFACE THERMAL TROUGH WILL REMAIN NEAR THE OREGON COAST RANGE
AND THE SOUTHWEST WASHINGTON LOWLANDS THROUGH MONDAY. THE
COMBINATION OF LOW RELATIVE HUMIDITY...MID-LEVEL INSTABILITY AND
CRITICALLY DRY FUELS WILL MAINTAIN EXTREME FIRE WEATHER CONDITIONS
THROUGH MONDAY. AN UPPER LEVEL DISTURBANCE OFF THE CALIFORNIA
COAST MOVING NORTH IS EXPECTED TO BE OFF THE SOUTH OREGON COAST
LATE MONDAY AFTERNOON OR EARLY EVENING. THIS WILL RESULT IN A
THREAT OF DRY THUNDERSTORMS THROUGH MONDAY NIGHT...ADDING ANOTHER
CRITICAL ELEMENT TO THE EXTREME FIRE WEATHER ENVIRONMENT.

ORZ602>608-WAZ604-660-160000-
/O.EXT.KPQR.FW.W.0005.000000T0000Z-140916T1200Z/
ZONE 602-ZONE 603-ZONE 604-ZONE 605-ZONE 606-ZONE 607-ZONE 608-
ZONE 660-
110 PM PDT SUN SEP 14 2014

...RED FLAG WARNING NOW IN EFFECT UNTIL 5 AM PDT TUESDAY FOR LOW
RELATIVE HUMIDITY...AN INCREASINGLY UNSTABLE ENVIRONMENT...CRITICALLY
DRY FUELS AND DRY THUNDERSTORMS FOR OREGON FIRE WEATHER ZONES
602...603... 604...605...606...607...AND 608...AS WELL AS
WASHINGTON FIRE WEATHER ZONES 604 AND 660...

* AFFECTED AREA...OREGON FIRE WEATHER ZONES
  602...603...604...605...606...607...608. WASHINGTON ZONES 604
  AND 660. THIS INCLUDES THE CLARK COUNTY LOWLANDS AND EXTREME
  SOUTH WASHINGTON CASCADES AND FOOTHILLS IN WASHINGTON AND MUCH
  OF NORTHWEST OREGON FROM THE COAST RANGE TO THE CASCADES.

* TIMING...CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH
  MONDAY NIGHT.

* STABILITY...MID-LEVEL HAINES 6 CONDITIONS THROUGH MONDAY.

* RELATIVE HUMIDITY...12 TO 25 PERCENT MONDAY. VERY POOR HUMIDITY
  RECOVERY TONIGHT ON SLOPES AND RIDGES.

* THUNDERSTORMS...A THREAT OF THUNDERSTORMS OVER THE SOUTH HALF OF
  THE FORECAST AREA LATE MONDAY AFTERNOON OR EARLY EVENING THEN
  SPREADING NORTH THEREAFTER. VERY LITTLE RAINFALL WITH ANY
  STORM...ESPECIALLY THOSE OVER THE NORTH HALF OF THE REGION.

* WINDS...EAST WIND WILL BECOME RATHER LOCALIZED TONIGHT AND
  MONDAY. STRONGEST WIND OF 10 TO 20 MPH WITH GUSTS TO 30 MPH WILL
  BE CONFINED TO PORTIONS OF THE NORTH OREGON CASCADES AND
  FOOTHILLS...WEST PORTION OF ZONE 660...AND IN THE COLUMBIA GORGE
  WEST OF CASCADE LOCKS.

* IMPACTS...THE COMBINATION OF LOW HUMIDITY...AN INCREASINGLY
  UNSTABLE ENVIRONMENT...CRITICALLY DRY FUELS AND POSSIBLE
  LIGHTNING MAY RESULT IN RAPID FIRE SPREAD OF ON-GOING INCIDENTS
  AND THE POTENTIAL FOR NEW STARTS. WIND WILL BE AN ADDED FACTOR
  NEAR THE COLUMBIA RIVER GORGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.

&&

$$

WEISHAAR


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