952  
FXUS63 KIWX 251027  
AFDIWX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
627 AM EDT SAT MAR 25 2017  
   
SYNOPSIS
 
 
ISSUED AT 500 AM EDT SAT MAR 25 2017  
 
UPPER LEVEL DISTURBANCES WILL MOVE NORTHEAST ALONG A STATIONARY  
FRONT THIS WEEKEND AND BRING CHANCES FOR SHOWERS AND STORMS  
THROUGH SUNDAY. RAIN WILL BECOME MORE WIDESPREAD SUNDAY AS THE  
UPPER LOW MOVES OVER THE AREA. HIGHS SOUTH OF THE FRONT OVER MUCH  
OF NORTHERN INDIANA WILL REACH THE 60S TO AROUND 70S TODAY, WITH  
ONLY 40S AND 50S NORTH OF THE FRONT.  
 

 
   
SHORT TERM
 
(TODAY THROUGH SUNDAY)  
ISSUED AT 500 AM EDT SAT MAR 25 2017  
 
A DEEP UPPER LOW WAS OVER EASTERN OKLAHOMA EARLY THIS MORNING  
WITH A STATIONARY FRONT EXTENDING NORTHEAST FROM THE ASSOCIATED  
SURFACE LOW INTO NORTHWEST INDIANA. THE MARINE LAYERS OF BOTH LAKE  
MICHIGAN AND LAKE ERIE WERE ACCENTUATING THE COLD AIR BEHIND THE  
FRONT GIVEN LAKE WATER TEMPERATURES IN THE 30S. HAVE LOWERED HIGHS  
IN THE NORTHEAST CORNER OF THE FORECAST AREA FROM HILLSDALE TO  
WAUSEON WHERE AN EAST FLOW WAS SPREADING CHILLY AIR WEST. GIVEN  
THIS SCENARIO, THESE NORTHEAST HIGHS MAY STILL BE TOO WARM.  
OTHERWISE, IMPULSES FROM THE UPPER LOW WILL MOVE NORTHEAST AND  
BRING MORE SHOWERS AND STORMS TO THE AREA, ESPECIALLY OVER  
NORTHWEST INDIANA AND FAR SOUTHWEST LOWER MICHIGAN. THE UPPER LOW  
SHOULD LIFT OVER THE FORECAST AREA BY LATE SUNDAY FAVORING  
WIDESPREAD SHOWERS AND STORMS. SEVERE WEATHER IS NOT EXPECTED,  
BUT LOCALLY HEAVY RAINFALL MAY CAUSE LIMITED FLOODING.  
 

 
   
LONG TERM
 
(SUNDAY NIGHT THROUGH FRIDAY)  
ISSUED AT 500 AM EDT SAT MAR 25 2017  
 
A SERIES OF UPPER LEVEL SYSTEM WILL EJECT NORTHEAST OUT OF THE MAIN  
UPPER TROF THIS UPCOMING WEEK AND BRING SEVERAL CHANCES FOR RAIN  
THROUGH FRIDAY. THE BEST CHANCES FOR RAIN OVER THE FORECAST AREA AT  
THIS TIME WILL COINCIDE WITH THE ARRIVAL OF THESE SHORT WAVE TROFS  
AND APPEAR TO BE MONDAY NIGHT AND THEN THURSDAY THROUGH FRIDAY.  
TEMPERATURES WILL BE ABOVE NORMAL EACH DAY WITH A HIGH CHANCE FOR  
READINGS STAYING ABOVE FREEZING ALL OF NEXT WEEK. SEVERE WEATHER  
CHANCES APPEAR LOW, BUT RAINFALL AMOUNTS THIS UPCOMING WEEK MAY  
TOTAL MORE THAN AN INCH.  
 

 
   
AVIATION
 
(FOR THE 12Z TAFS THROUGH 12Z SUNDAY MORNING)  
ISSUED AT 626 AM EDT SAT MAR 25 2017  
 
CDFNT EXTENDING FROM EAST TO WEST ACROSS NRN OH-IN EXPECTED TO  
SAG JUST SLIGHTLY SOUTH TODAY AS STRONG HIGH OVER ONTARIO MOVES  
EAST TO QUEBEC. VERTICALLY STACKED LOW OVER THE SRN PLAINS  
ADVECTING MOISTURE N-NE ALONG THIS FRONTAL BOUNDARY RESULTING IN  
SHRA AND ISOLATED TS. IFR CONDITIONS HAVE BEEN BECOMING MORE  
WIDESPREAD NORTH OF THE FRONTAL BOUNDARY EARLY THIS MORNING. NOT  
MUCH IMPROVEMENT EXPECTED IN FLIGHT CONDITIONS AT SBN WHICH SHOULD  
REMAIN ON THE NORTH SIDE OF THIS BOUNDARY TODAY, WITH CONDITIONS  
LIKELY DETERIORATING FURTHER TONIGHT AS OCNL SHRA CONT. FWA WILL  
LIKELY REMAIN ON THE WARM SIDE OF THE BOUNDARY BUT MOISTURE WILL  
BE INCREASING AS THE LOW APPROACHES WITH SHRA LIKELY BY TONIGHT,  
CAUSING FLIGHT CONDITIONS TO LOWER TO IFR.  
 

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

 
 

 
 
SYNOPSIS...SKIPPER  
SHORT TERM...SKIPPER  
LONG TERM...SKIPPER  
AVIATION...JT  
 
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WWW.YOUTUBE.COM/NWSNORTHERNINDIANA  
 
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