993  
FXUS63 KIWX 160848 AAA  
AFDIWX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
341 AM EDT THU OCT 16 2025  
   
KEY MESSAGES
 
 
- DECREASING CLOUDS TODAY AND REMAINING COOL ALBEIT SLIGHTLY  
WARMER THAN YESTERDAY.  
 
- TRENDING WARMER FRIDAY AND SATURDAY.  
 
- BREEZY THIS WEEKEND WITH A 70% TO 80% CHANCE OF RAIN AND  
THUNDERSTORMS SATURDAY AFTERNOON THROUGH SUNDAY MORNING.  
 

 
   
DISCUSSION
 
 
ISSUED AT 302 AM EDT THU OCT 16 2025  
 
RIDGING OVER THE CENTRAL CONUS WILL CONTINUE BUILDING NORTH AND  
WESTWARD TODAY. DECREASING CLOUDS FROM THE NORTHEAST MOVING  
SLOWLY SOUTHWESTWARD OVER THE AREA TODAY AS THE ANTICYCLONIC  
FLOW OVER THE BUILDING RIDGE TO OUR WEST ALLOWS FOR DRIER AIR TO  
PUSH IN FROM THE NORTHEAST BEFORE MID AND HIGH LEVEL DEBRIS  
CLOUDS FROM THE NEXT INCOMING SYSTEM BEGINS INCREASING LATER  
TONIGHT WITH THE ARRIVAL OF THE RIDGE FLOW. HIGH TEMPERATURES  
WILL BE A FEW DEGREES WARMER THAN YESTERDAY WITH HIGHS MAINLY IN  
THE UPPER 60S. A FEW AREAS TO THE SOUTHWEST WILL GET INTO THE  
LOWER 70S.  
 
TEMPERATURES WILL CONTINUE TO TREND WARMER ON FRIDAY AND  
SATURDAY, WITH HIGHS IN THE 70S ON FRIDAY AND IN THE UPPER 70S  
TO LOW 80S ON SATURDAY, AHEAD OF A PRETTY DYNAMIC TROUGH THAT  
WILL PUSH SOUTHEASTWARD INTO THE REGION ORIGINATING FROM THE  
GULF OF ALASKA. BREEZY CONDITIONS WITH RAIN AND THUNDERSTORMS ARE ON  
TAP SATURDAY INTO SUNDAY. INSTABILITY AND DIRECTIONAL SHEAR RELATED  
TO THE FRONT COULD SPUR AN ISOLATED SEVERE STORM OR TWO. THE SPC  
CURRENTLY HAS A MAJORITY OF OUR CWA UNDER A MARGINAL SEVERE THREAT  
FOR SATURDAY. ON SUNDAY AFTERNOON, WINDS WILL PEAK WITH GUSTS UP TO  
AROUND 30 TO 35 MPH POSSIBLE BEHIND THE COLD FRONT AND COLDER  
AIRMASS ADVECTING INTO THE AREA. HIGHS ON SUNDAY WILL ONLY GET INTO  
THE UPPER 50S TO LOW 60S. LOWS ON MONDAY MORNING WILL BE IN THE  
LOWER 40S. THESE COOLER TEMPERATURES WILL STICK AROUND THROUGH NEXT  
WEEK WITH PERIODS OF RAIN SHOWERS WITH TROUGHING SETTING UP  
RESIDENCE OVER THE GREAT LAKES REGION.  
 

 
   
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/
 
 
ISSUED AT 150 AM EDT THU OCT 16 2025  
 
VFR CONDITIONS ARE EXPECTED AT THE TAF SITES, WITH THE STRATUS  
DECK THAT WAS IMPACTING THE TERMINALS (CURRENTLY BKN/OVC  
3500-4500FT) CONTINUES TO SLOWLY SINK SOUTHWESTWARD. AS  
MENTIONED IN THE PREVIOUS DISCUSSION THIS STRATUS COULD REBUILD  
LATE TONIGHT ONCE FLOW VEERS AHEAD OF NEXT SYSTEM-BUT  
CONFIDENCE IS FAIRLY LOW WITH DRY AIR STILL FILTERING IN FROM  
THE NORTHEAST. MAINTAINED THE PREVIOUS FORECAST FOR NOW, BUT  
WILL AMEND IF TRENDS SUGGEST THE STRATUS REBUILDING.  
 

 
   
IWX WATCHES/WARNINGS/ADVISORIES
 
 
IN...NONE.  
OH...NONE.  
MI...NONE.  
MARINE...NONE.  
 

 
 

 
 
DISCUSSION...ANDERSEN  
AVIATION...MCD  
 
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