373  
FXUS61 KILN 051848  
AFDILN  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE WILMINGTON OH  
248 PM EDT SAT JUL 5 2025  
   
SYNOPSIS
 
 
HIGH PRESSURE EXTENDING ACROSS THE REGION WILL SLOWLY SHIFT EAST ON  
SUNDAY, WITH A CHANCE OF A LATE DAY THUNDERSTORMS AHEAD OF AN  
APPROACHING COLD FRONT. THIS WEAK COLD FRONT WILL DROP INTO THE AREA  
ON MONDAY AND THEN DISSIPATE INTO MIDWEEK.  
 

 
   
NEAR TERM /THROUGH TONIGHT/
 
 
AREA CONTINUES TO BE DOMINATED BY MID LEVEL RIDGING, WITH SURFACE  
HIGH CENTERED OVER WESTERN VA SLOWLY PULLING EAST. LIGHT SW FLOW WILL  
WANE AGAIN OVERNIGHT, ALLOWING FOR SOME VALLEY FOG MAINLY IN NE KY  
AND AREAS OF THE SCIOTO/HOCKING/LICKING VALLEYS. MUGGY OVERNIGHT  
LOWS NEAR 70.  
 

 
   
SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/
 
 
A SHORT WAVE AND ASSOCIATED COLD FRONT WILL DROP FROM THE WESTERN  
GREAT LAKES AND APPROACH THE NW FORECAST AREA, MAINLY NEAR AND NW OF  
DAYTON. SO THERE IS EXPECTATION OF A FEW MORE CUMULUS CLOUDS ON  
SUNDAY. SOUTHERN OHIO, SE INDIANA AND NORTHERN KENTUCKY HAVE THE BEST  
CHANCE FOR SOME SPOTTY LOCATIONS TO REACH 100 HEAT INDEX VALUES WHERE  
CLOUDS WILL BE A LITTLE MORE SPARSE AND HIGHER SURFACE DEWPOINTS  
LINGER. CAMS HAVE BEEN COMING IN WITH A CHANCE FOR SCATTERED TO  
WIDELY SCATTERED LATE AFTERNOON AND EARLY EVENING THUNDERSTORMS, AND  
AS MENTIONED IN PREVIOUS DISCUSSION, SOME MODELS HINTING AT MID  
LEVEL ENERGY AND INCREASED MOISTURE WORKING IN FROM THE SOUTH FROM  
THE ACTIVITY CENTERED OVER THE SE CONUS. IF THIS PATTERN PERSISTS,  
MAY HAVE TO BRING IN A CHANCE FOR SUNDAY AFTERNOON ACTIVITY FURTHER  
SOUTH INTO THE TRI STATE.  
 
FOR SUNDAY NIGHT, WHILE CONVECTIVE ACTIVITY AHEAD OF THE APPROACHING  
COLD FRONT WILL WANE WITH THE LOSS OF DAYTIME INSTABILITY, STILL SOME  
POTENTIAL FOR ISOLATED SHOWERS/STORMS IN WEST CENTRAL OHIO THROUGH  
EASTERN INDIANA. OVERNIGHT LOWS A LITTLE WARMER INTO THE LOWER 70S.  
 

 
   
LONG TERM /MONDAY THROUGH SATURDAY/
 
 
THERE ARE STILL SOME DIFFERENCES IN HOW WET THE WEEK WILL BE BUT IN  
THE LEAST, RAINFALL CHANCES ARE LIKELY TO PERSIST THROUGHOUT THE  
ENTIRE LONG TERM PERIOD.  
 
TEMPERATURES START OFF HOT ON MONDAY, ESPECIALLY AS MOISTURE POOLS  
AGAINST THE COLD FRONT DROPPING INTO THE AREA. THUNDERSTORMS ARE  
EXPECTED THROUGHOUT THE AFTERNOON AND EVENING WITH DOWNBURST AND  
LOCALLY HEAVY RAINFALL POTENTIAL RETURNING TO THE AREA. MEAN FLOW OF  
10-15 KNOTS SHOULD KEEP THUNDERSTORMS MOVING NORTHEAST OVER TIME,  
BUT BACKBUILDING SETUPS WILL LIKELY RESULT IN LOCALIZED FLASH  
FLOODING.  
 
TUESDAY, CONFIDENCE BEGINS TO DECREASE IN THE OVERALL PATTERN  
EVOLUTION WITH THE ECMWF ENSEMBLE STILL FASTER TO PUSH MOISTURE  
SOUTHWARD, LIMITING SHOWER AND THUNDERSTORM CHANCES TO ALONG AND  
SOUTH OF THE OHIO RIVER. THE GEFS IS A BIT SLOWER, KEEPING RAINFALL  
CHANCES ALONG AND SOUTH OF I-70. NBM SPLITS THE DIFFERENCE WITH THE  
HIGHEST POPS ACROSS THE SOUTHERN HALF OF THE AREA.  
 
ADDITIONAL DIFFERENCES CONTINUE WEDNESDAY WITH THE GEFS FASTER WITH  
THE NEXT SYSTEM AND THE ECMWF ENSEMBLE STILL QUITE DRY. THERE WILL  
LIKELY BE A DIURNAL COMPONENT TO THE COVERAGE IN  
SHOWERS/THUNDERSTORMS WEDNESDAY, BUT THE OVERALL FORECAST IS LIKELY  
TO CHANGE (HIGHER OR LOWER POPS) OVER THE COMING DAYS.  
 
BY THURSDAY, A DEEPER TROUGH DIPS THROUGH THE GREAT LAKES,  
INCREASING POPS OVER THE ENTIRE AREA. DEPENDING ON THE SPEED AT  
WHICH THE FRONT MOVES THROUGH, THERE WILL STILL BE A LINGERING  
THREAT FOR ADDITIONAL THUNDERSTORMS FRIDAY, ESPECIALLY ACROSS  
NORTHERN KENTUCKY AND SOUTHERN OHIO.  
 
ENSEMBLE GUIDANCE DIVERGES AGAIN FOR SATURDAY WITH THE GEFS BRINGING  
A STRONGER TROUGH INTO THE GREAT LAKES (WETTER SOLUTION FOR LOCAL  
AREA) AND ECMWF ENSEMBLE DIPPING IT INTO THE CENTRAL PLAINS (DRIER  
SOLUTION FOR THE LOCAL AREA).  
 
OVERALL, MONDAY IS EXPECTED TO BE THE WARMEST DAY OF THE WEEK WITH  
THE REST OF THE WEEK INFLUENCED BY CLOUDS AND PRECIPITATION. IF THE  
DRIER SOLUTION WORKS OUT FOR TUESDAY AND WEDNESDAY, LESS HUMID  
CONDITIONS MAY BE EXPERIENCED FOR A LARGE PORTION OF THE AREA.  
 

 
   
AVIATION /18Z SATURDAY THROUGH THURSDAY/
 
 
GENERALLY VFR CONDITIONS THROUGH THE PERIOD, WITH SCATTERED VFR CU  
TODAY WHICH SHOULD DISSIPATE BY 00Z, AND A LITTLE MORE CU ON MONDAY  
AFTERNOON WITH THE APPROACH OF THE WEAK COLD FRONTAL BOUNDARY.  
LIGHT AND VARIABLE WINDS WILL BE SOUTHERLY DURING THE DAY,  
DIMINISHING AGAIN OVERNIGHT, THEN PICK UP TO NEAR 05-10KTS ACROSS  
KDAY/KCMH/KLCK SUNDAY AFTERNOON. EXPECT MVFR TO POSSIBLY IFR  
VISIBILITY RESTRICTIONS 10-12Z AT KLUK.  
 
OUTLOOK...THUNDERSTORMS ARE POSSIBLE MONDAY EVENING, TUESDAY, AND  
WEDNESDAY.  
 

 
   
ILN WATCHES/WARNINGS/ADVISORIES
 
 
OH...AIR QUALITY ALERT UNTIL MIDNIGHT EDT TONIGHT FOR OHZ046-055-056-065-  
070-071-077-078.  
KY...AIR QUALITY ALERT UNTIL MIDNIGHT EDT TONIGHT FOR KYZ091>093.  
IN...AIR QUALITY ALERT UNTIL MIDNIGHT EDT TONIGHT FOR INZ074.  
 

 
 

 
 
SYNOPSIS...JDR  
NEAR TERM...JDR  
SHORT TERM...JDR  
LONG TERM...MCGINNIS  
AVIATION...JDR  
 
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