915  
FXUS63 KLMK 041046  
AFDLMK  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LOUISVILLE KY  
646 AM EDT FRI JUL 4 2025  
   
..UPDATED AVIATION DISCUSSION  
 
   
KEY MESSAGES  
 
* VERY WARM TEMPERATURES WITH HIGHS IN THE 90S FOR MOST, BUT  
REASONABLE HUMIDITY LEVELS TODAY.  
 
* HIGHER HUMIDITY RETURNS THIS WEEKEND, WITH RAIN AND THUNDERSTORM  
CHANCES INCREASING SUNDAY INTO NEXT WEEK.  
 
 
   
SHORT TERM /THROUGH TONIGHT/  
 
ISSUED AT 210 AM EDT FRI JUL 4 2025  
 
CLEAR SKIES AND LIGHT WINDS OVER THE REGION HAS LEAD TO SOME VERY  
LIGHT FOG IN THE VALLEY AREAS SO FAR THIS MORNING. EXPECTING THIS  
TREND TO CONTINUE THROUGH SUNRISE.  
 
RIDGING ALOFT WILL SLOWLY MOVE INTO THE OHIO VALLEY FROM THE WEST,  
WHICH WILL INCREASE HEIGHTS AND THEREFORE, TEMPERATURES. EXPECTING  
TO SEE HIGH TEMPERATURES IN THE UPPER 80S TO LOW 90S, AND URBAN  
AREAS WILL BE FLIRTING WITH THE MID 90S. HEAT INDICES WILL BE IN THE  
UPPER 90S, AND WITH MANY OUTDOOR ACTIVITIES THIS AFTERNOON AND  
EVENING, IT IS IMPORTANT TO FIND SHADE AND HYDRATE. AT THE SURFACE,  
HIGH PRESSURE WILL KEEP WINDS LIGHT OVER THE REGION. SIMILAR TO  
YESTERDAY WITH VERY ISOLATED, BRIEF, LIGHT SHOWERS POPPING UP IN THE  
AFTERNOON, WOULDN'T RULE OUT A SIMILAR CASE IN THE LATE AFTERNOON.  
AGAIN, THIS IS VERY LOW CONFIDENCE, AND WITH SO MUCH DRY AIR AT THE  
SURFACE, WOULD LIKELY NOT MEASURE RAIN AT THE SURFACE.  
 
IN THE EVENING, THE NOCTURNAL INVERSION WILL QUICKLY SET UP OVER THE  
REGION, GIVEN CLEAR SKIES AND CALM WINDS, TRAPPING SMOKE FROM LOCAL  
FIREWORK DISPLAYS UNDER THE INVERSION. THIS SMOKE WILL LEAD TO SOME  
REDUCTIONS IN VISIBILITY THROUGH THE OVERNIGHT. LOW TEMPERATURES  
WILL BE A BIT WARMER IN THE UPPER 60S AND LOW 70S.  
 
 
   
LONG TERM /SATURDAY THROUGH THURSDAY/  
 
ISSUED AT 210 AM EDT FRI JUL 4 2025  
 
SATURDAY...  
 
UPPER RIDGING WILL CONTINUE TO MOVE OVER THE REGION, WHICH WILL  
INCREASE TEMPERATURES INTO THE LOW TO MID 90S FOR SATURDAY. HIGH  
PRESSURE AT THE SURFACE WILL SHIFT OFF TO THE EAST LATER SATURDAY,  
WHICH WILL ALLOW WINDS TO BEGIN TO VEER TO THE SOUTH. SATURDAY WILL  
LIKELY REMAIN DRY.  
 
SUNDAY - FRIDAY...  
 
HIGH PRESSURE WILL CONTINUE TO SHIFT OFF TO THE EAST BRINGING A  
RETURN OF SOUTHWESTERLY FLOW AND MOISTURE. ALOFT, RIDGING WILL  
CONTINUE TO SHIFT OFF TO THE EAST AND DEAMPLIFY. THIS WILL KEEP  
TEMPERATURES ON SUNDAY IN THE LOW TO MID 90S. DEW POINTS WILL  
INCREASE SLIGHTLY, WHICH WILL BRING HEAT INDICES FLIRTING WITH 100F.  
AT THIS TIME, MOST AREAS WILL REMAIN BELOW 100F. CONVECTIVE TEMPS ON  
SUNDAY WILL BE IN THE LOW 90S, COUPLED WITH SOME MOISTURE RETURN,  
COULD SEE SOME ISOLATED SHOWERS DEVELOP OVER THE SOUTHERN HALF OF  
THE REGION.  
 
SUNDAY NIGHT THROUGH THE END OF THE WEEK, MULTIPLE SHORTWAVE  
DISTURBANCES ALONG MOSTLY ZONAL FLOW WILL BRING DAILY CHANCES FOR  
SHOWERS AND STORMS. TUESDAY A COLD FRONT WILL MOVE SOUTH AND STALL  
IN THE VICINITY OF THE LOWER OHIO VALLEY, WHICH WILL FURTHER  
INCREASE CHANCES FOR SHOWERS AND STORMS EACH DAY. DUE TO NO SHEAR IN  
THE REGION, NOT EXPECTING SEVERE STORMS. HOWEVER, COULD SEE SOME  
STRONG STORMS MID WEEK, GIVEN INCREASING CAPE EACH DAY. PWATS WILL  
BE 2.0-2.1 INCHES THROUGH THE WEEK, WHICH COULD LEAD TO SOME HEAVY  
RAIN AT TIMES.  
 
 
   
AVIATION /12Z TAFS THROUGH 18Z SATURDAY/  
 
ISSUED AT 645 AM EDT FRI JUL 4 2025  
 
MOSTLY VFR CONDITIONS EXPECTED. LIGHT EASTERLY WINDS WILL PICK UP  
BY MID MORNING. A SCT CU FIELD WILL DEVELOP OVER THE REGION IN THE  
AFTERNOON. BASED ON PREVIOUS YEARS, SDF IS LIKELY TO DROP TO AT  
LEAST MVFR VSBY IN THE PLANNING PERIOD DUE TO FIREWORK SMOKE. PATCHY  
FOG WILL BE POSSIBLE AGAIN SATURDAY MORNING.  
 
 
   
LMK WATCHES/WARNINGS/ADVISORIES  
 
KY...NONE.  
IN...NONE.  
 
 
 
 
 
SHORT TERM...SRW  
LONG TERM...SRW  
AVIATION...SRW  
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