Fire Weather Outlook Discussion
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FNUS21 KWNS 251549
FWDDY1

DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1048 AM CDT THU AUG 25 2016

VALID 251700Z - 261200Z

NO CHANGES HAVE BEEN MADE TO THE ELEVATED AREA ACROSS PARTS OF SWRN
WA AND WRN ORE. SEE THE PREVIOUS DISCUSSION BELOW FOR MORE
INFORMATION.

..GLEASON.. 08/25/2016

.PREV DISCUSSION... /ISSUED 0202 AM CDT THU AUG 25 2016/

...SYNOPSIS...
WEAK MID-LEVEL TROUGHING WILL PERSIST ACROSS WESTERN PORTIONS OF THE
COUNTRY TODAY...WHILE RIDGING REMAINS STRONG OVER THE SOUTHEAST.
MID-LEVEL FLOW WILL BE RELATIVELY WEAK IN DRY AREAS OF THE WEST.  AT
THE SURFACE...A WEAK LOW/INVERTED TROUGH WILL PERSIST ACROSS THE
WESTERN GREAT BASIN...WHILE HIGH PRESSURE MOVES SOUTHWARD ACROSS THE
NORTHERN HIGH PLAINS AND A 1037 MB HIGH MOVES SLOWLY WESTWARD NEAR
45N/145W IN THE NORTHEASTERN PACIFIC.  ALTHOUGH FIRE WEATHER
CONCERNS OVERALL SHOULD BE MODEST ACROSS THE COUNTRY DUE TO WEAK
FLOW IN MOST DRY AREAS...PARTS OF THE PACIFIC NORTHWEST WILL
EXPERIENCE ELEVATED FIRE WEATHER CONDITIONS THIS AFTERNOON.

...SOUTHWESTERN WASHINGTON STATE AND WESTERN OREGON...
HIGH-RESOLUTION MODEL GUIDANCE /PARTICULARLY THE RAP AND NAM4/
SUGGEST THAT NORTHERLY SURFACE FLOW WILL DEVELOP IN THE REGION THIS
AFTERNOON...PARTIALLY IN RESPONSE TO MODEST NORTHERLY MID-LEVEL FLOW
AND THE PRESSURE GRADIENT BETWEEN THE NORTHEASTERN PACIFIC HIGH
PRESSURE AREA AND THE WESTERN GREAT BASIN INVERTED TROUGH.  WINDS
WILL APPROACH 15 MPH IN SEVERAL AREAS...WITH HIGHER GUSTS NOT
COMPLETELY OUT OF THE QUESTION.  SUNSHINE AND WARMING SURFACE
TEMPERATURES WILL FOSTER FALLING RH VALUES REACHING 10-15
PERCENT...ESPECIALLY IN AREAS AWAY FROM THE COAST.  DRY FUELS IN THE
REGION WILL BE CONDUCIVE FOR FIRE SPREAD...AND LATEST GUIDANCE FROM
THE NORTHWEST GACC INDICATE A CRITICAL BURN ENVIRONMENT FOR PARTS OF
THE AREA.  AN ELEVATED FIRE WEATHER DELINEATION HAS BEEN INTRODUCED
TO ADDRESS THIS THREAT.

...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...

$$



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