261  
FXUS63 KIWX 212054  
AFDIWX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
354 PM EST TUE NOV 21 2017  
   
SYNOPSIS
 
 
ISSUED AT 315 PM EST TUE NOV 21 2017  
 
SHOWERS WILL END THIS EVENING AS A COLD FRONT MOVES OUT OF THE  
AREA. LOWS TONIGHT SHOULD DIP TO AROUND 25 DEGREES. COLDER AND  
DRY WEATHER IS AHEAD FOR WEDNESDAY AS HIGH PRESSURE BUILDS INTO  
THE REGION WITH HIGHS IN THE MID TO UPPER 30S. DRY WEATHER WILL  
CONTINUE THURSDAY AND FRIDAY WITH MILD WEATHER. HIGHS SHOULD BE  
NEAR 50 FRIDAY.  
 

 
   
SHORT TERM
 
(THIS EVENING THROUGH WEDNESDAY)  
ISSUED AT 310 PM EST TUE NOV 21 2017  
 
A COLD FRONT WAS OVER FAR SOUTHWEST LOWER MICHIGAN INTO NORTHWEST  
INDIANA THIS AFTERNOON. A STRONG UPPER LEVEL SYSTEM WITH FAVORABLE  
UPPER LEVEL JET DYNAMICS WERE ABLE TO OVERCOME A VERY DRY  
ENVIRONMENT AND PRODUCE AN AREA OF RAIN IN THE VICINITY OF THE  
FRONT. THE BEST UPPER LEVEL SUPPORT WAS NORTH OF THE MICHIGAN LINE  
WHERE RAINFALL AMOUNTS EXCEEDED A TENTH OF AN INCH. RAINFALL  
AMOUNTS MAINLY UNDER 0.05 INCH ARE EXPECTED OVER INDIANA AND OHIO  
BEFORE MIDNIGHT. VERY LOW INVERSION HEIGHTS SHOULD PROHIBIT A LAKE  
RESPONSE OF LAKE EFFECT RAIN OR SNOW SHOWERS. HIGH PRESSURE WILL  
CONTINUE TO BUILD IN WEDNESDAY WITH DECREASING CLOUDS AND COLD  
WEATHER.  
 

 
   
LONG TERM
 
(WEDNESDAY NIGHT THROUGH TUESDAY)  
ISSUED AT 353 PM EST TUE NOV 21 2017  
 
FAIRLY TRANQUIL WEATHER IS AHEAD THIS WEEKEND INTO EARLY NEXT  
WEEK. ANOTHER COLD FRONT WILL BRING A CHANCE FOR SHOWERS FRIDAY  
NIGHT AFTER A BRIEF WARMUP FRIDAY. LITTLE IF ANY RAINFALL IS  
EXPECTED. HIGHS WILL COOL BACK DOWN BRIEFLY INTO THE 30S BY  
SUNDAY. WARMER WEATHER WILL RETURN BY TUESDAY WITH HIGHS  
APPROACHING OR IN THE 50S BY TUESDAY.  
 
 

 
   
AVIATION
 
(FOR THE 18Z TAFS THROUGH 18Z WEDNESDAY AFTERNOON)  
ISSUED AT 1224 PM EST TUE NOV 21 2017  
 
CURRENTLY THE SFC FRONT IS SITU ACROSS THE REGION WITH WINDS WSW  
AT KSBN AND SW AT KFWA. EXPECT THE FRONT TO PUSH THROUGH THE AREA  
THIS AFTN WITH WINDS TURNING NWLY BY 19Z AT KSBN AND AROUND 22Z  
AT KFWA. LATEST RADAR TRENDS SHOWS A BAND OF LIGHT PRECIP PUSHING  
EAST WHICH WILL IMPACT THE TERMINAL SITES FOR A PERIOD OF ABOUT 3  
HOURS RESPECTIVELY THIS AFTN. CIGS POST FRONTAL WILL GENERALLY BE  
3 TO 5K FT THEN SCATTER OUT LATER TONIGHT AT KFWA.  
 

 
   
IWX WATCHES/WARNINGS/ADVISORIES
 
 
IN...NONE.  
MI...NONE.  
OH...NONE.  
LM...SMALL CRAFT ADVISORY UNTIL 7 AM EST WEDNESDAY FOR LMZ043-046.  
 

 
 

 
 
SYNOPSIS...SKIPPER  
SHORT TERM...SKIPPER  
LONG TERM...SKIPPER  
AVIATION...FRAZIER  
 
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