648  
FNUS22 KWNS 210653  
FWDDY2  
 
DAY 2 FIRE WEATHER OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0153 AM CDT THU SEP 21 2017  
 
VALID 221200Z - 231200Z  
   
..SYNOPSIS
 
 
VERY LITTLE CHANGE TO LARGE-SCALE PATTERN IS EXPECTED ON FRIDAY, AS  
A DEEP UPPER TROUGH REMAINS OVER THE WEST, WHILE AN UPPER RIDGE  
REMAINS IN PLACE FROM THE EASTERN PLAINS INTO THE OHIO VALLEY. A  
WEAK SURFACE LOW IS EXPECTED TO MOVE FROM THE CENTRAL HIGH PLAINS  
TOWARD THE UPPER GREAT LAKES THROUGH THE PERIOD, WHILE ANOTHER LOW  
REDEVELOPS IN THE LEE OF THE ROCKIES.  
   
..CENTRAL HIGH PLAINS
 
 
ANOTHER RELATIVELY DRY AND WINDY DAY IS EXPECTED ACROSS PORTIONS OF  
THE CENTRAL HIGH PLAINS, AS LOW-LEVEL SOUTH-SOUTHWESTERLY FLOW  
REMAINS STRONG AHEAD OF THE TROUGH OVER THE WEST. SOME MODEST  
MOISTENING IS POSSIBLE COMPARED TO D1/THURSDAY, THOUGH TRAJECTORIES  
OFF OF THE GULF OF MEXICO ARE EXPECTED TO REMAIN RATHER UNFAVORABLE  
FOR SUBSTANTIAL MOISTURE RETURN INTO THE HIGH PLAINS. SINCE  
SUSTAINED WINDS ARE EXPECTED TO REMAIN IN THE 20-25 MPH RANGE ACROSS  
A BROAD AREA, THE FIRE WEATHER THREAT WILL BE LARGELY DETERMINED BY  
WHERE THE GREATEST RH REDUCTIONS WILL OCCUR. THERE IS A FAIR AMOUNT  
OF MODEL SPREAD REGARDING WHERE THE STRONGEST DRYING WILL OCCUR,  
THOUGH THERE IS MODEST AGREEMENT THAT THE AREA FROM EASTERN CO INTO  
WEST-CENTRAL/NORTHWEST KS AND SOUTHWEST NE WILL SEE RH VALUES DROP  
INTO THE 15-25% RANGE, RESULTING IN AN ELEVATED TO LOCALLY CRITICAL  
FIRE WEATHER THREAT. SOME ADJUSTMENTS TO THIS ELEVATED AREA WILL  
LIKELY BE NEEDED WITH TIME AS DETAILS REGARDING THE RH FORECAST ARE  
RESOLVED, AND IT IS POSSIBLE THAT SOME AREAS WILL SEE CRITICAL  
CONDITIONS.  
   
..FOUR CORNERS REGION
 
 
DRY AND WINDY CONDITIONS ARE ALSO EXPECTED TO PERSIST ACROSS THE  
FOUR CORNERS REGION ON FRIDAY, THOUGH SOME COOLING IS EXPECTED  
COMPARED TO D1/THURSDAY. SUSTAINED WINDS ARE LIKELY TO REMAIN IN THE  
20-25 MPH RANGE, BUT WITH SOME INCREASE IN RH VALUES EXPECTED AND  
GENERALLY MARGINAL FUEL CONDITIONS ACROSS THIS AREA, NO ELEVATED  
DELINEATION HAS BEEN MADE ACROSS THE REGION.  
 
..DEAN.. 09/21/2017  
   
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
 
 

 
 
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