764   
ACUS48 KWNS 180822  
SWOD48  
SPC AC 180820  
  
DAY 4-8 CONVECTIVE OUTLOOK    
NWS STORM PREDICTION CENTER NORMAN OK  
0320 AM CDT FRI SEP 18 2026  
  
VALID 211200Z - 261200Z  
   
..DISCUSSION  
  
INITIALLY ZONAL MID-LEVEL FLOW, WITH EMBEDDED LOW-AMPLITUDE IMPULSES  
TRAVERSING THE CENTRAL CONUS EARLY NEXT WEEK, WILL GIVE WAY TO  
GRADUAL AMPLIFICATION OF AN UPPER RIDGE OVER THE CENTRAL U.S. THE  
BEST CHANCE FOR ANY SEVERE THUNDERSTORMS WILL BE ON DAY 4/MONDAY  
ACROSS THE TN VALLEY, WHERE A SURFACE COLD FRONT, PRECEDED BY RICH  
LOW-LEVEL MOISTURE, WILL BE SLOW TO CLEAR THE REGION. THEREAFTER,  
DRIER LOW-LEVEL CONDITIONS WILL PREVAIL ACROSS MUCH OF THE CENTRAL  
AND EASTERN CONUS, WITH SURFACE HIGH PRESSURE POISED TO SETTLE OVER  
MUCH OF THE U.S. BETWEEN THE MS RIVER AND THE APPALACHIANS, LIMITING  
THE SEVERE THREAT.  
  
..SQUITIERI.. 09/18/2026  
 
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