779  
FXUS63 KIWX 261013  
AFDIWX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
613 AM EDT TUE MAR 26 2019  
   
SYNOPSIS
 
 
ISSUED AT 334 AM EDT TUE MAR 26 2019  
 
ANOTHER SUNNY SKY DAY WITH CLEAR SKIES AND LIGHT WINDS IS AHEAD.  
AFTERNOON HIGHS WILL REACH THE MID AND UPPER 40S. AFTER ANOTHER  
CHILLY NIGHT TONIGHT, HIGHS WEDNESDAY SHOULD CLIMB A LITTLE ABOVE  
NORMAL TO THE MID AND UPPER 50S. PERIODS OF WET WEATHER ARE  
AHEAD THURSDAY INTO SATURDAY, WITH HIGHS MOSTLY IN THE 50S. IT IS  
EXPECTED TO TURN COLDER AGAIN FOR SUNDAY AND MONDAY.  
 

 
   
SHORT TERM
 
(TODAY AND TONIGHT)  
ISSUED AT 328 AM EDT TUE MAR 26 2019  
 
A HIGH PRESSURE SYSTEM WILL REMAIN OVER THE REGION AND BRING MOSTLY  
CLEAR SKIES, LIGHT WINDS AND SEASONALLY COOL TEMPERATURES TODAY WITH  
HIGHS IN THE 40S. SKIES WILL REMAIN CLEAR TONIGHT WITH LOWS DROPPING  
INTO THE 20S, WELL BELOW THE NORMAL LOWS FOR THIS TIME OF YEAR NEAR  
FREEZING. RETURN FLOW WILL BEGIN WEDNESDAY WITH MODERATING  
TEMPERATURES AS THE HIGH MOVES EAST.  
 

 
   
LONG TERM
 
(WEDNESDAY THROUGH MONDAY)  
ISSUED AT 328 AM EDT TUE MAR 26 2019  
 
A WET AND SOMEWHAT MILD PERIOD IS SHAPING UP FOR THURSDAY THROUGH  
SATURDAY THAT WILL BRING THE POTENTIAL FOR HEAVY RAIN. ENERGY WAVES  
EJECTING OUT OF A DEEP UPPER LOW SOUTH OF ALASKA WILL MOVE EAST  
ACROSS THE CONUS. AHEAD OF THESE SYSTEMS, WARMER AIR WILL SPREAD  
ACROSS THE AREA AND ALLOW TEMPERATURES TO RISE ABOVE NORMAL THURSDAY  
WITH HIGHS IN THE 50S. PRECIPITABLE WATER VALUES WILL RISE ABOVE  
0.8 INCH WEDNESDAY NIGHT AND PERSIST IN THE 0.8 TO 1.2 RANGE INTO  
SATURDAY. A STRONG WAVE WITH A VERY DISTINCT SATELLITE SIGNATURE  
NEAR 40N AND 140W THIS MORNING WILL EJECT OUT OF THE MAIN LOW AND  
TRACK EAST. INDICATIONS ARE THE GFS HAS INITIALIZED AND IS  
TRACKING THIS SYSTEM TOO FAST, SO STILL SOME UNCERTAINTY ON TIMING  
AND LOCATION OF THE HEAVIEST RAINFALL. THE LATEST WPC FORECAST  
HAS 1.50 TO 2.50 INCHES OVER THE FORECAST AREA. GIVEN SEVERAL  
FAVORABLE FACTORS FOR ROUNDS OF MODERATE TO HEAVY RAIN INCLUDING  
MULTIPLE WAVES EJECTING EAST, HIGH PRECIPITABLE WATER AMOUNTS, A  
FRONT SOUTH OF THE AREA AND SOMEWHAT OF A TROPICAL CONNECTION,  
HEAVY RAINFALL IS POSSIBLE. THE ESF (HYDROLOGICAL OUTLOOK) THAT  
WAS ISSUED YESTERDAY WILL BE UPDATED TO CONTINUE TO HIGHLIGHT  
THESE CONCERNS. COLDER AIR WITH DRY CONDITIONS WILL SPREAD ACROSS  
THE AREA AS HIGH PRESSURE BUILDS INTO THE REGION EARLY NEXT WEEK.  
 

 
   
AVIATION
 
(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING)  
ISSUED AT 613 AM EDT TUE MAR 26 2019  
 
VFR THROUGH THE PERIOD AS RIDGING SFC AND ALOFT DOMINATE.  
 

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

 
 

 
 
SYNOPSIS...SKIPPER  
SHORT TERM...SKIPPER  
LONG TERM...SKIPPER  
AVIATION...T  
 
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