586  
FNUS22 KWNS 200703  
FWDDY2  
 
DAY 2 FIRE WEATHER OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0202 AM CDT MON AUG 20 2018  
 
VALID 211200Z - 221200Z  
   
..SYNOPSIS
 
 
A MID-LEVEL TROUGH ACROSS THE NORTHWESTERN CONUS WILL WEAKEN AND  
EVOLVE INTO A MID-LEVEL CUT-OFF LOW ACROSS THE NORTHWEST GREAT BASIN  
TOWARDS THE END OF DAY 2/TUESDAY. AT THE SURFACE, HIGHER PRESSURE  
WILL BECOME ESTABLISHED ACROSS NORTH-CENTRAL PORTIONS OF THE GREAT  
BASIN INTO THE CENTRAL ROCKIES, WITH A WEAKENING SURFACE LOW ACROSS  
THE PACIFIC NORTHWEST. AVAILABLE MID-LEVEL MOISTURE WILL CONTINUE TO  
SUPPORT THE DEVELOPMENT OF AT LEAST ISOLATED THUNDERSTORM ACTIVITY  
ACROSS PORTIONS OF THE PACIFIC NORTHWEST INTO THE NORTHERN GREAT  
BASIN.  
   
..PORTIONS OF NEVADA
 
 
ELEVATED DELINEATIONS WERE ADDED TO AREAS ALONG THE  
CALIFORNIA/NEVADA BORDER TO THE LEE OF THE SIERRAS, AND PORTIONS OF  
EAST CENTRAL NEVADA. IN BOTH OF THESE REGIONS, A WELL MIXED BOUNDARY  
LAYER WILL BE REALIZED BY PEAK HEATING DURING THE AFTERNOON. IN THE  
WESTERN DELINEATION, 15-20 MPH WILL RESULT FROM DOWNSLOPE FLOW ALONG  
THE EASTERN SIERRAS ALONG WITH CRITICALLY LOW RH. A WELL MIXED  
BOUNDARY LAYER UP TO 600 MB WILL ALLOW FOR STRONGER FLOW ALOFT TO  
MIX TO THE SURFACE, WITH 15-25 MPH SUSTAINED SOUTHWESTERLY WINDS AND  
CRITICALLY LOW RH EXPECTED IN THE EASTERN ELEVATED DELINEATION.  
HERE, LOCALLY CRITICAL CONDITIONS MAY ALSO OCCUR DURING THE LATE  
AFTERNOON/EARLY EVENING HOURS.  
   
..PACIFIC NORTHWEST
 
 
AT LEAST ISOLATED THUNDERSTORMS WILL DEVELOP ALONG THE NORTHERN  
PERIPHERY OF A WEAKENING SURFACE LOW DURING THE LATE AFTERNOON HOURS  
ON DAY 2/TUESDAY. AN ISOLATED DRY THUNDERSTORM DELINEATION WAS ADDED  
FOR AREAS WHERE THE GREATEST CONCENTRATION OF DRY STRIKES ARE  
EXPECTED, AND WHERE FUELS ARE VERY RECEPTIVE TO FIRE SPREAD.  
 
..SQUITIERI.. 08/20/2018  
   
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
 
 

 
 
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