121
FXUS63 KIWX 151058
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
658 AM EDT WED JUL 15 2026
KEY MESSAGES
- HOT CONDITIONS CONTINUE THIS WEEK.
- HAZY TO SMOKY CONDITIONS POSSIBLE LATER TODAY FROM CANADIAN WILDFIRE
SMOKE
- CHANCES FOR SHOWERS AND STORMS RETURN LATE THIS WEEK INTO THIS
WEEKEND, PRIMARILY DURING THE AFTERNOON AND EVENING HOURS.
DISCUSSION
ISSUED AT 340 AM EDT WED JUL 15 2026
NOT MANY CHANGES TO THE ONGOING FORECAST THIS SHIFT WITH THINGS
ON PRETTY GOOD TRACK. WITH THE LONGITUDINALLY ELONGATED RIDGING
STILL IN PLACE ACROSS THE CENTRAL CONUS INCLUDING OUR AREA, THE
HOT CONDITIONS LOOK TO CONTINUE. WE HAVE A HEAT ADVISORY IN
EFFECT TODAY ACROSS THE ENTIRE AREA THROUGH THIS EVENING. DEW
POINTS IN THE LOWER 70S AND HIGH TEMPERATURES IN THE 90S ACROSS
THE AREA TODAY WILL PROVIDE HEAT INDICES FROM ABOUT 100 TO 105.
SOME QUESTIONS ON EXACT HIGH TEMPERATURES DUE TO HIGH LEVEL
SMOKE PUSHING SOUTHWARD INTO THE AREA FROM THE NORTH WHICH HAS
ORIGINATED FROM CANADA WILDFIRES. THE SMOKE COULD POTENTIALLY KEEP
TEMPERATURES A FEW DEGREES COOLER WITH SLIGHTLY LESS SOLAR
INSOLATION NOT THAT IT WILL MAKE FOR BIG CHANGES IN THE HOT
CONDITIONS BUT COULD MAKE IT SLIGHTLY LESS OPPRESSIVE. WITH THE
RIDGING SLOW TO BREAK DOWN THE HEAT LOOKS TO LINGER INTO THE END
OF THE WEEK ALBEIT SLIGHTLY COOLER.
A WEAK DISTURBANCE MOVING INTO THE AREA THROUGH THE UPPER LEVEL
FLOW BEGINNING THURSDAY LATE AFTERNOON AND EVENING LOOK TO
BRING CHANCES FOR SHOWERS/THUNDERSTORMS INTO FRIDAY STARTING
ACROSS THE SOUTHWESTERN PORTIONS OF THE AREA BEFORE SPREADING
NORTHEASTWARD. A BETTER CHANCE FOR STORMS THEN MOVES INTO THE
AREA IN THE FORM OF A TROUGH THAT RIPPLES SOUTHWARD FROM CANADA
ON THE EASTERN PERIPHERY OF A HIGH AMPLITUDE UPPER LEVEL RIDGE
ACROSS THE CENTRAL CONUS NORTHWARD INTO WESTERN CENTRAL CANADA.
STILL A BIT OF UNCERTAINTY ON EXACT TIMING AND HOW MUCH MOISTURE
MAY STEAM NORTHWARD DUE TO THE RIDGING, BUT THE AFTERNOON AND
EVENING TIMES EACH DAY INTO THE WEEKEND LOOKS TO BRING SHOWERS
AND THUNDERSTORMS. A COLD FRONTAL BOUNDARY IS EXPECTED TO PUSH
SOUTHWARD ON MONDAY AND WILL BRING A SHOT OF COOLER THAN NORMAL
TEMPERATURES BY THE MIDDLE OF NEXT WEEK.
AVIATION /12Z TAFS THROUGH 12Z THURSDAY/
ISSUED AT 643 AM EDT WED JUL 15 2026
VFR CONDITIONS EXPECTED THROUGH THIS TAF PERIOD WITH HIGH
PRESSURE FIRMLY IN PLACE OVER THE REGION. SOME CANADIAN WILDFIRE
SMOKE IN THE UPPER LEVELS HAS BEEN DRIFTING OVER THE REGION.
CONFIDENCE IS NOT HIGH IN HOW MUCH SMOKE MAKES IT DOWN TO THE
SURFACE BUT DID PUT IN MENTION OF HZ FOR KFWA AFTER 06Z WITH
SOME POSSIBLY MAKING IT DOWN TO THE SURFACE AND PERHAPS SLIGHTLY
LOWERING VSBYS TO AROUND 6 MILES. OTHERWISE, LIGHT VARIABLE TO
NORTHWESTERN WINDS LESS THAN 10 KTS THROUGH THE FORECAST.
IWX WATCHES/WARNINGS/ADVISORIES
IN...HEAT ADVISORY FROM NOON EDT /11 AM CDT/ TODAY TO 8 PM EDT /7
PM CDT/ THIS EVENING FOR INZ005>009-012>015-017-018-020-
022>027-032>034-103-104-116-203-204-216.
AIR QUALITY ALERT UNTIL MIDNIGHT EDT TONIGHT FOR INZ020.
AIR QUALITY ALERT UNTIL MIDNIGHT CDT TONIGHT FOR INZ103-203.
OH...HEAT ADVISORY FROM NOON TODAY TO 8 PM EDT THIS EVENING FOR
OHZ001-002-004-005-015-016-024-025.
MI...HEAT ADVISORY FROM NOON TODAY TO 8 PM EDT THIS EVENING FOR
MIZ078>081-177-277.
AIR QUALITY ALERT UNTIL MIDNIGHT EDT TONIGHT FOR MIZ078>081-
177-277.
MARINE...NONE.
DISCUSSION...ANDERSEN
AVIATION...ANDERSEN
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