406
FXUS63 KIWX 201853
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
253 PM EDT SUN JUL 20 2025
KEY MESSAGES
- AN AREA OF LIGHT RAIN OVER NORTHERN INDIANA AND NORTHWEST OHIO
WILL GRADUALLY DIMINISH.
- LIGHT RAIN WILL PERSIST INTO TUESDAY MAINLY SOUTH OF HIGHWAY
30.
- HOT AND HUMID CONDITIONS WILL DEVELOP WEDNESDAY AND PERSIST
THROUGH FRIDAY WITH HIGHS IN THE LOWER 90S AND HEAT INDICES
FROM 100 TO 105.
DISCUSSION
ISSUED AT 136 PM EDT SUN JUL 20 2025
EARLY THIS AFTERNOON, A COLD FRONT HAD MOVED SOUTH INTO THE
FORECAST AREA. AN AREA OF RAIN WITH A FEW EMBEDDED THUNDERSTORMS
WAS MOVING EAST ACROSS NORTHERN INDIANA INTO OHIO. THE STRONGEST
STORMS HAVE CONGEALED JUST SOUTH OF THE FORECAST AREA WHERE THE
AIRMASS WAS MUCH MORE UNSTABLE. GIVEN THE STABILITY OF THE
AIRMASS OVER THE FORECAST AREA WITH CLOUD COVER AND RAIN COOLED
AIR, HEAVY RAINFALL IS NO LONGER EXPECTED. PATCHES OR AREAS OF
LIGHT RAIN SHOULD PERSIST INTO MONDAY EVENING MAINLY SOUTH OF
HIGHWAY 30. CONDITIONS FROM MONDAY EVENING INTO THURSDAY SHOULD
BE MAINLY DRY.
HOT AND HUMID CONDITIONS ARE AHEAD THIS UPCOMING WEEK. THE HOT
WEATHER WILL RETURN BY WEDNESDAY AND PERSIST THROUGH THE
WEEKEND. HIGH TEMPERATURES ARE EXPECTED TO BE AROUND 90 DEGREES
INTO THE LOWER 90S WITH HEAT INDICES FROM 100 TO 105. HEAT
HEADLINES ARE LIKELY TO EVENTUALLY BE ISSUED.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 119 PM EDT SUN JUL 20 2025
A SLOW MOVING FRONTAL BOUNDARY IS CURRENTLY JUST NORTH OF THE US
30 CORRIDOR. NORTH OF THE FRONT, WINDS HAVE ALREADY SHIFTED FROM
THE WEST TO THE NORTH AT KSBN. EXPECT A SIMILAR WIND SHIFT TO
OCCUR THIS EVENING AT KFWA ONCE THE FRONT MAKES IT THROUGH
(BETWEEN 21Z TO 00Z TONIGHT). SCATTERED LIGHT TO MODERATE RAIN
CONTINUES TO PUSH THROUGH THE AREA, WITH POTENTIAL FOR SOME
REDEVELOPMENT LATER TODAY MAINLY SOUTH OF US 24. HAVE KEPT IN A
TEMPO GROUP FOR THUNDER AT KFWA FOR A FEW HOURS THIS EVENING IN
CASE SCATTERED STORMS DO DEVELOP. CEILINGS SHOULD REMAIN ON
THE LOW END OF VFR, DOWN TO MVFR IN ANY STORMS. OTHERWISE,
EXPECT LIGHT WINDS THIS EVENING AND INTO THE OVERNIGHT FROM THE
NORTH. WITH A DRIER AIRMASS ADVECTING IN FROM THE NORTH,
LINGERING MOISTURE NEAR THE GROUND AND CLEARING SKIES OVERNIGHT
COULD LEAD TO SOME RADIATION FOG DEVELOPING BY EARLY MONDAY
MORNING. MUCH LIKE THIS MORNING, FOG WILL LIKELY BE PATCHY.
DURING THE DAY MONDAY, DRY AND PLEASANT WEATHER IS EXPECTED.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...SKIPPER
AVIATION...JOHNSON
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