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628
FNUS21 KWNS 021541
FWDDY1

DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1040 AM CDT TUE SEP 02 2014

VALID 021700Z - 031200Z

A WEAK INVERTED TROUGH OVER NWRN CA WILL AID IN PRODUCING AN
OFFSHORE WIND TUESDAY NIGHT CONTINUING INTO WEDNESDAY OVER PORTIONS
OF SWRN OREGON AND NWRN CA WHERE FUELS CONTINUE VERY DRY.  THIS WILL
AFFECT MAINLY THE HIGHER ELEVATIONS AND ALSO LEAD TO A POOR HUMIDITY
RECOVERY OVERNIGHT.

OTHERWISE...NO MAJOR CHANGES EXCEPT TO EXPAND THE ELEVATED AREA OVER
SOUTHERN WYOMING SLIGHTLY TO THE NORTH INTO MORE OF CENTRAL WYOMING.

..BOTHWELL.. 09/02/2014

.PREV DISCUSSION... /ISSUED 0246 AM CDT TUE SEP 02 2014/

...SYNOPSIS...
A SHORTWAVE TROUGH WILL MOVE NEWD FROM THE MID MS VALLEY ACROSS THE
UPPER GREAT LAKES/ERN ONTARIO AND INTO WRN NY. AS THIS
OCCURS...UPPER PATTERN ACROSS THE NRN THIRD OF THE CONUS WILL TREND
ZONAL WITH ENHANCED WLY FLOW EXTENDING THROUGH IT. COMPACT SHORTWAVE
TROUGH WILL DROP INTO THE PACIFIC NW FROM WRN BRITISH COLUMBIA LATE
IN THE PERIOD. AT THE SURFACE...COLD FRONT WILL MOVE EWD/SEWD ACROSS
THE OH VALLEY AND NORTHEAST STATES. SRN PORTION OF THIS COLD FRONT
-- FROM SRN MO WWD ACROSS THE KS/OK BORDER -- WILL REMAIN STATIONARY
THROUGHOUT THE DAY BEFORE BEGINNING TO SHIFT NWD AS A WARM FRONT
AFTER 00Z/WED.

...SRN WY...
WLY FLOW ALOFT IS EXPECTED TO INCREASE THROUGHOUT THE
PERIOD...HELPING SUPPORT WLY SURFACE WINDS NEAR 20-25 MPH AS THE
BOUNDARY LAYER MIXES. GUSTS AROUND 30 MPH ARE POSSIBLE. AIRMASS
ACROSS THE REGION IS VERY DRY /00Z RIW SOUNDING REPORTED A PW VALUE
OF 0.3O INCH -- BELOW THE 25TH PERCENTILE/...SUPPORTING RH VALUES
AROUND 15-20 PERCENT AS TEMPERATURES INCREASE INTO THE UPPER 70S AND
LOW 80S. THESE METEOROLOGICAL CONDITIONS COMBINED WITH DRY FUELS ARE
CONSISTENT WITH AN ELEVATED TO LOCALLY CRITICAL FIRE WEATHER THREAT.

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





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