160  
ACUS01 KWNS 270057  
SWODY1  
SPC AC 270055  
 
DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0755 PM CDT THU JUN 26 2025  
 
VALID 270100Z - 271200Z  
 
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR THE NEXT  
COUPLE OF HOURS ACROSS EASTERN IOWA INTO SOUTHWESTERN WISCONSIN...  
   
..SUMMARY  
 
ISOLATED WIND DAMAGE AND MARGINALLY SEVERE HAIL WILL BE THE MAIN  
THREATS THROUGH LATE EVENING/EARLY TONIGHT FROM EASTERN KANSAS INTO  
SOUTHERN WISCONSIN, PARTS OF THE MID-ATLANTIC AND APPALACHIANS, THE  
TEXAS PANHANDLE, AND EASTERN MONTANA.  
   
..EASTERN KS TO SOUTHERN WI THROUGH LATE EVENING  
 
CONVECTION HAS EVOLVED INTO A LINE OF STORMS FROM NORTHWEST MO INTO  
EASTERN IA AND SOUTHWEST WI ALONG A CONGLOMERATE OUTFLOW, IN ADVANCE  
OF A WEAK MIDLEVEL TROUGH APPROACHING THE UPPER MS VALLEY.  
WEAKENING BUOYANCY WITH THE LOSS OF DAYTIME HEATING AND WEAKENING  
VERTICAL SHEAR OVER TIME IN THE WARM SECTOR SUGGESTS THAT THE STORMS  
ARE LIKELY PAST PEAK, THOUGH ISOLATED WIND DAMAGE WILL REMAIN  
POSSIBLE FOR THE NEXT 2 HOURS OR SO BEFORE THE STORMS WEAKEN  
SUFFICIENTLY AND THE LOW LEVELS STABILIZE.  
   
..MID-ATLANTIC AND APPALACHIANS THROUGH 03Z  
 
SCATTERED THUNDERSTORMS ARE ONGOING IN MULTIPLE SMALL CLUSTERS FROM  
CENTRAL NC INTO VA/WV/MD AND SOUTHERN PA. A FEW STRONG STORMS WITH  
ISOLATED WIND DAMAGE WILL BE POSSIBLE THROUGH ABOUT 02-03Z,  
ESPECIALLY WITH STORM MERGERS, BEFORE GRADUAL STABILIZATION OF THE  
BOUNDARY LAYER BRINGS AN END TO THE LARGELY DIURNAL SEVERE THREAT.  
   
..TX PANHANDLE THROUGH LATE EVENING  
 
A FEW STORM CLUSTERS ARE ONGOING ACROSS THE CENTRAL TX PANHANDLE TO  
THE TX/NM STATE LINE. LINGERING STEEP LOW-LEVEL LAPSE RATES, MODEST  
VERTICAL SHEAR AND STORM/OUTFLOW MERGERS COULD MAINTAIN A MARGINAL  
SEVERE THREAT FOR ANOTHER FEW HOURS BEFORE BUOYANCY WEAKENS AND THE  
STORMS DIMINISH.  
   
..EASTERN MT THIS EVENING  
 
DEEP-LAYER VERTICAL SHEAR IS NOT PARTICULARLY STRONG AND LOW-LEVEL  
MOISTURE IS LIMITED, BUT STEEP LAPSE RATES THROUGH THE LOW-MIDLEVELS  
ARE SUSTAINING A COUPLE OF STRONGER STORM CLUSTERS ACROSS NORTHEAST  
MT WHERE LOW-LEVEL MOISTURE IS A BIT RICHER. THERE WILL REMAIN  
SUFFICIENT MIDLEVEL MOISTURE/ASCENT DOWNSTREAM OF AN EJECTING  
MIDLEVEL TROUGH TO MAINTAIN THE POTENTIAL FOR THUNDERSTORMS FOR THE  
NEXT SEVERAL HOURS. ISOLATED STRONG OUTFLOW GUSTS MAY OCCUR WITH  
THE HIGH-BASED CONVECTION INTO CENTRAL MT, WHILE ISOLATED STRONG  
GUSTS AND MARGINALLY SEVERE HAIL WILL REMAIN POSSIBLE THIS EVENING  
ACROSS EASTERN MT.  
 
..THOMPSON.. 06/27/2025  
 
 
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