Fire Weather Outlook Discussion
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FNUS21 KWNS 271600
FWDDY1

DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1100 AM CDT SAT AUG 27 2016

VALID 271700Z - 281200Z

...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF SRN WA AND FAR NRN
ORE...

NO CHANGES HAVE BEEN MADE TO THE ELEVATED/CRITICAL AREAS ACROSS
PARTS OF THE PACIFIC NORTHWEST AND NRN/CNTRL ROCKIES. SEE THE
PREVIOUS DISCUSSION BELOW FOR MORE INFORMATION.

..GLEASON.. 08/27/2016

.PREV DISCUSSION... /ISSUED 0352 AM CDT SAT AUG 27 2016/

...SYNOPSIS...
BROADLY CYCLONIC MID-LEVEL FLOW...WITH EMBEDDED DISTURBANCES...WILL
OVERLIE PORTIONS OF THE WRN CONUS TO THE N-CNTRL CONUS. A SHORTWAVE
TROUGH IS FORECAST TO MOVE EWD ACROSS PARTS OF WRN CANADA...WITH
MID-LEVEL WLYS BECOMING ENHANCED ACROSS PARTS OF THE NWRN CONUS.
THIS SHOULD CONTRIBUTE TO ENHANCED FIRE-WEATHER CONDITIONS ACROSS
PARTS OF WA/ORE/ID/MT/WY/UT. ELSEWHERE...ELEVATED/CRITICAL
FIRE-WEATHER CONDITIONS ARE UNLIKELY.

...PORTIONS OF CNTRL/SRN/ERN WA...NRN ORE...ID...CNTRL/WRN
MT...WY...FAR NERN UT...
DIURNALLY STRENGTHENED VERTICAL MIXING IS FORECAST TO MANIFEST THE
ENHANCED FLOW ALOFT AT THE SFC...RESULTING IN MODERATE TO STRONG AND
GENERALLY WSWLY TO WLY WINDS. STRONG SFC HEATING...COMBINED WITH
AREAS OF DOWNSLOPE-FLOW-ENCOURAGED WARMING/DRYING...SHOULD ALLOW RH
VALUES TO FALL SUFFICIENTLY LOW IN SUPPORT OF AN INCREASED
FIRE-WEATHER RISK.

CRITICAL FIRE-WEATHER CONDITIONS ARE EXPECTED TO OCCUR ACROSS
PORTIONS OF SRN WA AND FAR NRN ORE. THIS INCLUDES PORTIONS OF THE
COLUMBIA RIVER VALLEY AND VICINITY...WHERE LOCAL-FLOW CHANNELING IS
FORECAST TO SUPPORT SUSTAINED WINDS OF 20-25 MPH. WITH MINIMUM RH
AROUND 17-20 PERCENT AND DRY FUELS IN PLACE...CRITICAL DESIGNATION
IS IN EFFECT. ELSEWHERE ACROSS THE REGION...ELEVATED FIRE-WEATHER
CONDITIONS ARE ANTICIPATED...THOUGH SUSTAINED WINDS ARE NOT EXPECTED
TO EXCEED 20 MPH WHERE CRITICALLY LOW RH VALUES OCCUR ON ANY MORE
THAN A BRIEF/SPOTTY BASIS.

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

$$



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