206
FXUS63 KIWX 081035
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
ISSUED BY NATIONAL WEATHER SERVICE INDIANAPOLIS IN
635 AM EDT THU MAY 8 2025
KEY MESSAGES
- COOLER THURSDAY WITH HIGHS IN THE 60S
- PLEASANT THROUGH THE WEEKEND WITH HIGHS IN THE 60S FRIDAY WARMING
INTO THE 70S TO AROUND 80 EARLY NEXT WEEK.
- SHOWER AND THUNDERSTORM CHANCES WILL BEGIN MONDAY AND INCREASE
TUESDAY AND WEDNESDAY.
DISCUSSION
ISSUED AT 324 PM EDT WED MAY 7 2025
A COLD FRONT WAS MOVING SOUTH ACROSS NORTHERN INDIANA. THE
CENTER OF A 1032 MB HIGH WAS OVER JAMES BAY. VERY CHILLY AIR OUT
OF CANADA WAS SPREADING SOUTHWEST OVER LOWER MICHIGAN INTO
NORTHERN INDIANA AND NORTHWEST OHIO BEHIND THE COLD FRONT. THE
FRONT WILL CONTINUE TO MOVE SOUTH TODAY, SETTING THE STAGE FOR A
VERY CHILLY NIGHT TONIGHT. COORDINATED THROUGH NWS IND (GIVEN
OUR BACKUP STATE) FOR A POTENTIAL FROST ADVISORY FOR THE
NORTHERN HALF OF OUR FORECAST AREA, WHICH WILL LIKELY BE NEEDED
TONIGHT INTO FRIDAY MORNING. LOW TEMPERATURES ARE LIKELY TO DIP
TO 36F TO 37F DEGREES OVER MUCH OF FAR SOUTHERN LOWER MICHIGAN
INTO ADJACENT PORTIONS OF NORTHERN INDIANA AND NORTHWEST OHIO.
THE CHILLY AIR SHOULD START MODERATING FRIDAY, HELPING TO END
THE POTENTIAL FOR MORE FROST FRIDAY NIGHT INTO THE WEEKEND.
MUCH WARMER AIR WILL SPREAD BACK INTO THE REGION SATURDAY
THROUGH MONDAY. HIGH TEMPERATURES WILL BE IN THE WELL INTO THE
70S SATURDAY, AND THEN IN THE UPPER 70S TO NEAR 80 SUNDAY
THROUGH TUESDAY. CONDITIONS ARE EXPECTED TO BE DRY THROUGH
SUNDAY BEFORE SHOWER AND THUNDERSTORM CHANCES INCREASE MONDAY
THROUGH WEDNESDAY AS A WEAK UPPER LOW SOUTH OF THE OHIO RIVER
DRIFTS NORTH.
AVIATION /12Z TAFS THROUGH 12Z FRIDAY/
ISSUED AT 635 AM EDT THU MAY 8 2025
THE COLD FRONT HAD MOVED SOUTH OF FWA WITH WINDS BEHIND THE
FRONT FROM THE NORTHEAST TO EAST AT ABOUT 7-10 KNOTS. RATHER
EXTENSIVE POSTÂ FRONTAL MAINLY VFR CLOUDS HAD SPREAD INTO LOWER
MICHIGAN FROM CANADA. THERE WAS A POST-FRONTAL TROFÂ OVER FAR
SOUTHERN LOWER MICHIGAN THAT WAS GENERATING A SMALL BAND OF
LIGHT SHOWERS NORTH OF THE MICHIGAN BORDER. THERE COULD BE A
BRIEF LIGHT SHOWER OR SPRINKLE AT EITHER THE SBN OR FWA
AIRPORTS, BUT CONDITIONS SHOULD STAY VFR. THE LOW AND MID
ATMOSPHERIC LAYERS SHOULD DRY OUT, HELPING TO SCATTER OUT THE
LOWER CLOUDS BY LATE IN THE TAF PERIOD.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 5 AM EDT FRIDAY FOR LMZ043-046.
DISCUSSION...SKIPPER
AVIATION...SKIPPER
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