920
FXUS63 KIWX 031655
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1255 PM EDT WED JUN 3 2026
KEY MESSAGES
- WARM THROUGH EARLY NEXT WEEK WITH HIGHS IN THE 80S AND LOWS
IN THE 50S AND 60S.
- DRY WITH PARTLY TO MOSTLY SUNNY SKIES TODAY AND THURSDAY.
INCREASING CLOUDS THURSDAY NIGHT INTO FRIDAY.
- CHANCES FOR SHOWERS AND THUNDERSTORMS STARTING FRIDAY
AFTERNOON AND CONTINUING THROUGH THE WEEKEND.
DISCUSSION
ISSUED AT 108 AM EDT WED JUN 3 2026
AN UPPER LEVEL RIDGE AND SURFACE HIGH PRESSURE LINGER OVER THE GREAT
LAKES THROUGH THURSDAY NIGHT, KEEPING WINDS FAIRLY LIGHT AND SKIES
PARTLY TO MOSTLY SUNNY. HIGHS WILL BE IN THE LOW TO MID 80S, WARMEST
THURSDAY. LOWS WILL BE IN THE 50S, AND LOW TO MID 60S.
THE UPPER RIDGE SINKS SOUTHEASTWARD THURSDAY NIGHT INTO FRIDAY, WITH
A BROAD TROUGH EXTENDING FROM THE CANADIAN PRAIRIE DOWN INTO A LOW
OVER THE DESERT SOUTHWEST. THE NORTHERN STREAM PORTION MOVES
THROUGH OUR AREA AS A MID LEVEL TROUGH (SOMEWHAT ZONAL FLOW AT
TIMES), WITH A WEAK AND TRANSIENT SURFACE LOW JUST NORTH-
NORTHEAST OF OUR AREA. THIS WILL BRING A COLD FRONT THROUGH
ROUGHLY NORTHWEST TO SOUTHEAST BY SUNDAY. BEING ON THE
NORTHWESTERN PERIPHERY OF THE UPPER RIDGE/THE INCOMING TROUGH
FRI-SAT MAKES US SUSCEPTIBLE TO VARIOUS SHORTWAVES RIPPLING
THROUGH THE MID-LEVEL FLOW, WHICH MAKES SPECIFIC TIMING
DIFFICULT TO PIN DOWN AT THIS POINT. IT'S ALSO POSSIBLE THE
INCOMING TROUGH/ANY PRECIPITATION GETS HUNG UP IN OUR NORTHWEST,
DELAYING THE START OF POPS BEYOND THE LAKE MI AREA UNTIL LATE
FRIDAY NIGHT/SAT AM. FOR NOW HAVE THE BEST CHANCES (GREATER THAN
55 PERCENT) BUILDING INTO AREAS NORTH OF US 24 AFTER 8 PM FRI,
THEN SINKING SOUTHEASTWARD THROUGH SATURDAY EVENING/SUN AM. HAVE
LOW (20- 30 PERCENT) CHANCES GENERALLY ALONG/SOUTH OF US 30) ON
SUNDAY, BUT THIS WILL DEPEND ON HOW FAR SOUTH THE FRONT GETS.
HIGHS REMAIN IN THE 80S, LOWS IN THE 50S, 60S.
MOSTLY DRY CONDITIONS EXPECTED MON/TUE WITH AN OMEGA-BLOCK SETTING
UP AROUND THAT TIME (HOW FAR EAST THE RIDGE PORTION SETS UP AND HOW
BROAD IT IS WILL DETERMINE ANY PRECIP CHANCES). HIGHS REMAIN IN THE
80S, LOWS IN THE 50S, 60S.
AVIATION /18Z TAFS THROUGH 18Z THURSDAY/
ISSUED AT 1253 PM EDT WED JUN 3 2026
HIGH PRESSURE REMAINS IN PLACE THROUGH THE TAF PERIOD PROMOTING
TRANQUIL WEATHER CONDITIONS. FEW TO SCT CLOUDS ARE STREAMING IN
FROM THE WEST BUT ARE EXPECTED TO CLEAR AFTER SUNSET. VRB WIND
AGAIN TONIGHT WITH A LOSS OF DAYTIME MIXING FOLLOWED BY SOUTH-
SOUTHWEST WIND DEVELOPING MIDDAY THURSDAY.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...MCD
AVIATION...BROWN
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