374
FNUS21 KWNS 031641
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1141 AM CDT THU SEP 03 2026
VALID 031700Z - 041200Z
..PARTS OF SOUTHERN MONTANA AND EASTERN WY
PRIMARY CHANGE FOR THIS UPDATE INCLUDES AN EASTWARD EXPANSION OF
ELEVATED HIGHLIGHTS INTO BORDERING AREAS OF NE/SD. CURRENT SURFACE
OBSERVATIONS ACROSS EASTERN WY INTO FAR WESTERN NE/SD REFLECT
ENHANCED DOWNSLOPE DRYING WITH RH ALREADY FALLING INTO THE 20-25%
RANGE. FURTHER BOUNDARY LAYER DRYING AND MIXING THROUGH THIS
AFTERNOON WILL RESULT IN MINIMUM RH VALUES BELOW 10% IN SOME
LOCATIONS. WEST TO SOUTHWEST WINDS WILL BE BOLSTERED BY A SURFACE
LOW ACROSS THE NORTHERN PLAINS REACHING SPEEDS OF 15-20 MPH BY
MID-AFTERNOON. THESE WINDS COMBINED WITH LOW RH WILL SUPPORT
ELEVATED FIRE WEATHER CONDITIONS ACROSS MUCH OF EASTERN WY, FAR
WESTERN NE/SD AND PARTS OF SOUTHERN MT FOR SEVERAL HOURS THIS
AFTERNOON.
..WILLIAMS.. 09/03/2026
PREV DISCUSSION
/ISSUED 1226 AM CDT THU SEP 03 2026/
..SYNOPSIS
A CORRIDOR OF SOUTHWESTERLY FLOW BETWEEN THE MID-LEVEL TROUGH OVER
THE NORTHWEST AND THE CENTRAL US RIDGE WILL CONTINUE TO PRESENT AN
AREA OF GUSTY WINDS AND LOW RHS TO MT/WY AND PORTIONS OF THE GREAT
BASIN TODAY. ELEVATED FIRE WEATHER CONCERNS REMAIN FARTHER NORTHEAST
ALONG THE AXIS OF DRY SOUTHWEST FLOW OVER CENTRAL WY WITH DRY BUT
GENERALLY SLIGHTLY LESS WINDY CONDITIONS PRESENT OVER ADJACENT
PORTIONS OF MT, NE, AND SD AS WELL. DEEP AND DRY SOUTHWESTERLY FLOW
AMID LEE SURFACE TROUGHING WILL CONTINUE TO SUPPORT SURFACE WINDS OF
15-20 MPH COINCIDENT WITH DAYTIME RHS OF 10-20%. SIMILARLY,
SOUTHWEST WINDS OF 15-25 MPH AMID RHS DROPPING AS LOW AS 10-15% ARE
LIKELY ACROSS SOUTHEASTERN NV INTO SOUTHWESTERN UT THIS AFTERNOON.
HOWEVER, RELATIVELY DAMP FUELS WILL MITIGATE AN OTHERWISE CRITICAL
FIRE WEATHER EVENT ACROSS THAT REGION, RESULTING IN POTENTIALLY
LOCALIZED ELEVATED FIRE WEATHER CONDITIONS THIS AFTERNOON.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
CLICK HERE TO GO TO PREVIOUS BULLETINS.
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