543
FNUS22 KWNS 021947
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0246 PM CDT WED SEP 02 2026
VALID 031200Z - 041200Z
...PORTIONS OF THE NORTHERN ROCKIES INTO THE HIGH PLAINS OF WYOMING
AND MONTANA...
AN UPPER-LEVEL LOW WILL PIVOT DEEPER INTO THE PACIFIC NORTHWEST
THURSDAY. DRY, SOUTHWEST FLOW AHEAD OF THIS TROUGH WILL EXTEND
NORTHEASTWARD FROM THE DESERT SOUTHWEST INTO EASTERN WY AND SOUTHERN
MT. MUCH OF THE MID-LEVEL MOISTURE AND ASSOCIATED HIGH-BASED
ISOLATED SHOWERS AND THUNDERSTORMS ACROSS SOUTHERN MT AND WY FOR
D1/WEDNESDAY WILL PUSH NORTHEASTWARD INTO D2/THURSDAY, WITH
WIDESPREAD RAINFALL NOT EXPECTED. A WELL-MIXED AND DRY BOUNDARY
LAYER DEVELOPING BY EARLY AFTERNOON WILL SUPPORT MINIMUM RH BELOW
10% IN SOME AREAS IN THE LEE OF MORE PROMINENT MOUNTAIN RANGES
BOLSTERED BY THE SOUTHWEST DOWNSLOPE TRAJECTORIES. THIS COMBINATION
OF LOW RH, SOUTHWEST WINDS OF 10-20 MPH AMID DRY FUELS AND POTENTIAL
LIGHTNING HOLDOVERS WILL PROMOTE ELEVATED FIRE WEATHER CONCERNS
ACROSS PORTIONS OF SOUTHERN MT AND MUCH OF EASTERN WY THURSDAY.
ELEVATED HIGHLIGHTS WERE EXTENDED INTO FAR NORTHWESTERN NE AND FAR
WESTERN SD BASED ON LATEST MODEL GUIDANCE CONSENSUS AND RECEPTIVE
FUELS.
..WILLIAMS.. 09/02/2026
PREV DISCUSSION
/ISSUED 1252 AM CDT WED SEP 02 2026/
..SYNOPSIS
A CORRIDOR OF DRY SOUTHWESTERLY FLOW BETWEEN THE MID-LEVEL TROUGH
OVER THE NORTHWEST AND THE CENTRAL US RIDGE WILL CONTINUE TO PRESENT
A FIRE WEATHER THREAT TO MT/WY AND PORTIONS OF THE GREAT BASIN ON
DAY 2/THURSDAY. FIRE WEATHER CONCERNS REMAIN FARTHER NORTHEAST ALONG
THE AXIS OF DRY SOUTHWEST FLOW ACROSS CENTRAL WY WHERE AN ELEVATED
RISK AREA HAS BEEN INTRODUCED. THE THREAT IS SIMILAR IN TIME AND
SPACE TO THE PRECEDING DAY 1/WEDNESDAY ELEVATED RISK. SOUTHWESTERLY
FLOW AMID LEE SURFACE TROUGHING, THOUGH SLIGHTLY LESS STRONG OF A
SURFACE PRESSURE GRADIENT VERSUS DAY 1/WEDNESDAY, WILL STILL SUPPORT
SURFACE WINDS OF 15-20 MPH COINCIDENT WITH DAYTIME RHS OF 10-20%.
SIMILARLY, SOUTHWEST WINDS OF 15-25 MPH AMID LOW DAYTIME RH ARE
LIKELY ACROSS SOUTHEASTERN NV INTO SOUTHWESTERN UT ON THE AFTERNOON
OF DAY 2/THURSDAY. HOWEVER, MARGINAL FUELS THAT HAVE DEVELOPED AFTER
PRECEDING DAYS OF RAIN SHOULD HELP TAME IMPACTS OF AN OTHERWISE
CRITICAL FIRE WEATHER EVENT ACROSS THE REGION. A LOCALIZED ELEVATED
FIRE WEATHER THREAT MAY BE POSSIBLE WHERE POCKETS OF RELATIVELY DRY
FUELS LINGER.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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