581
FXUS63 KIWX 251733
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
133 PM EDT WED JUN 25 2025
KEY MESSAGES
- PROLONGED HEAT WAVE CONTINUES WITH DANGEROUS AFTERNOON HEAT
INDICES REACHING 100 DEGREES EXPECTED OVER MOST AREAS THROUGH
FRIDAY.
- WARM LOWS IN THE LOW TO MID 70S THROUGH THURSDAY NIGHT WILL
PROVIDE LITTLE RELIEF FROM THE HEAT.
- SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE LIKELY EACH
DAY THROUGH THIS WEEKEND. STORMS MAY BECOME STRONG TO SEVERE
TODAY AND BE ACCOMPANIED WITH DAMAGING WINDS.
DISCUSSION
ISSUED AT 306 AM EDT WED JUN 25 2025
THE HEAT WAVE WILL CONTINUE THROUGH FRIDAY WITH HIGHS AROUND 90
OR IN THE LOWER 90S AND AFTERNOON HEAT INDICES GENERALLY
REACHING 100 DEGREES DURING THIS TIME. STORM COVERAGE YESTERDAY
WAS QUITE SMALL, BUT THE STORMS WERE ABLE TO PRODUCE COOL
OUTFLOWS THAT HAVE APPEARED TO HAVE BEEN ABLE TO HELP SOME WITH
SLIGHTLY COOLER TEMPERATURES AND SOMEWHAT LOWER HEAT INDICES AT
THE ONSET TODAY. IN COORDINATION WITH SURROUNDING OFFICES,
DECIDED TO ISSUE A HEAT ADVISORY FOR JUST OUR INDIANA AND OHIO
COUNTIES FOR TODAY. THERE IS A SIGNIFICANT CHANCE THE ENTIRE
FORECAST AREA WILL BE UNDER A HEAT ADVISORY THURSDAY AND FRIDAY.
CONCERN FOR THE MORE VULNERABLE POPULATIONS WITH THE START OF
THE 5TH DAY IN A ROW OF SIGNIFICANT HEAT. WILL CONTINUE TO
MESSAGE THESE CONCERNS.
AS FOR THUNDERSTORMS, STABLE MID LEVEL LAPSE RATES FROM 5.0 TO
5.5 C/KM AND WEAK WIND FLOW WILL CONTINUE TO BE LIMITING FACTORS
ON STORM DEVELOPMENT. EXPECT A REPEAT TODAY SIMILAR TO WHAT
HAPPENED WITH THE STORMS YESTERDAY: 1. DEVELOPMENT AFTER 16Z, 2.
SMALL IN SIZE, 3. LITTLE IF ANY MOVEMENT, 4. LOCALLY HEAVY
RAINFALL POTENTIAL, 5. BRIEF WIND GUSTS DURING DISSIPATION, 6
NOT SEVERE. THIS DIURNAL PATTERN WITH STORMS FROM BASICALLY 19Z
TO 01Z (3PM EDT TO 9PM EDT) SHOULD CONTINUE THROUGH SUNDAY.
AVIATION /18Z TAFS THROUGH 18Z THURSDAY/
ISSUED AT 124 PM EDT WED JUN 25 2025
SHOWERS AND STORMS ARE STARTING TO REDEVELOP TO THE SOUTH.
STORMS COULD MOVE UP INTO THE FWA AIRSPACE AROUND 22Z. CONVERSELY,
SBN MAY STAY DRY TODAY, WITH THE LATEST CAMS NOW DEPICTING THE
BEST CHANCE FOR ANY ACTIVITY NEAR THE TERMINAL TO BE LATER THIS
EVENING AFTER 03Z, AS A WEAK WAVE MOVES IN FROM THE NORTHWEST.
OUTSIDE OF ANY MODERATE TO HEAVY RAIN, CONDITIONS SHOULD REMAIN
VFR AT BOTH SITES.
IWX WATCHES/WARNINGS/ADVISORIES
IN...HEAT ADVISORY UNTIL 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.
OH...HEAT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR OHZ001-002-004-
005-015-016-024-025.
MI...NONE.
MARINE...NONE.
DISCUSSION...SKIPPER
AVIATION...COBB
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page