188  
FXUS63 KIWX 220734  
AFDIWX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
334 AM EDT TUE MAY 22 2018  
   
SYNOPSIS
 
 
ISSUED AT 123 AM EDT TUE MAY 22 2018  
 
LINGERING SHOWERS AND POSSIBLY A RUMBLE OF THUNDER WILL END LATER  
TODAY. DRY AND MUCH WARMER WEATHER IS AHEAD WITH HIGHS MOSTLY IN  
THE 80S FROM WEDNESDAY THROUGH THE END OF THE WEEK.  
 

 
   
SHORT TERM
 
(TODAY AND TONIGHT)  
ISSUED AT 307 AM EDT TUE MAY 22 2018  
 
AREAS OF DENSE FOG HAVE DEVELOPED ACROSS THE WESTERN ZONES AND  
OVER THE LAKE THIS MORNING. EXPECT THIS FOG TO PERSIST INTO THE  
LATE MORNING HOURS. SCATTERED SHOWERS AND POSSIBLY AN ISOLATED  
THUNDERSTORM ARE POSSIBLE INTO THE AFTERNOON HOURS PRIMARILY  
ACROSS THE FAR SOUTHEASTERN ZONES. PWAT VALUES REMAIN  
CLIMATOLOGICALLY HIGH FOR LATE MAY SO ANY STORMS THAT DEVELOPS  
WOULD BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL. A COLD FRONT  
WILL PUSH THROUGH THE EVENING TO BRING A CLOSE TO OUR RAIN  
CHANCES THROUGH THE OVERNIGHT HOURS. HIGH TEMPERATURES ARE  
EXPECTED TO RANGE FROM 60S ACROSS THE NORTH AND WEST WITH 70S  
ACROSS THE SOUTH AND EAST. OVERNIGHT LOWS WILL DROP INTO THE 50S  
FOR MUCH OF THE AREA.  
 

 
   
LONG TERM
 
(WEDNESDAY THROUGH MONDAY)  
ISSUED AT 307 AM EDT TUE MAY 22 2018  
 
UPPER LEVEL RIDGING SETS UP OVER THE REGION BY WEDNESDAY AND WILL  
PERSIST THROUGH THE END OF THE WORK WEEK. THIS WILL RESULT IN DRY  
AND WARMER WEATHER WITH HIGH TEMPERATURES EACH DAY BEING ABOUT 5  
DEGREES ABOVE SEASON AVERAGES FOR LATE MAY. AS THE MEMORIAL DAY  
WEEKEND STARTS A PATTERN CHANGE IS ON THE HORIZON. HEIGHT FALLS  
OVER THE AREA AS A PAIR OF UPPER LOWS EMANATE OUT OF MANITOBA  
WILL BRING OFF AND ON RAIN CHANCES BACK TO THE AREA INTO THE EARLY  
PARTS OF NEXT WEEK.  
 

 
   
AVIATION
 
(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT)  
ISSUED AT 119 AM EDT TUE MAY 22 2018  
 
A WEAK AREA OF LOW PRESSURE WILL MOVE ACROSS NORTHERN INDIANA  
TODAY. THIS SYSTEM WILL HELP KEEP LOW CLOUDS OVER THE SBN TERMINAL  
FOR MUCH OF THE TAF PERIOD. FWA IS EXPECTED TO DROP DOWN TO IFR  
FOR A FEW TO SEVERAL HOURS THIS MORNING BEFORE BECOMING VFR BY  
NOON. WINDS WILL EVENTUALLY BECOME NORTHWEST AS THE LOW MOVES OUT  
OF THE AREA WITH SOME BRIEF CLEARING POSSIBLE AT SBN AFTER 00Z.  
 

 
   
IWX WATCHES/WARNINGS/ADVISORIES
 
 
IN...DENSE FOG ADVISORY UNTIL 10 AM CDT THIS MORNING FOR INZ003-012-  
013.  
 
MI...DENSE FOG ADVISORY UNTIL 11 AM EDT THIS MORNING FOR MIZ077.  
 
OH...NONE.  
LM...DENSE FOG ADVISORY UNTIL 11 AM EDT THIS MORNING FOR LMZ043-046.  
 

 
 

 
 
SYNOPSIS...SKIPPER  
SHORT TERM...CM  
LONG TERM...CM  
AVIATION...SKIPPER  
 
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