321
FXUS63 KIWX 091807
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
207 PM EDT SAT AUG 9 2025
KEY MESSAGES
- HOT AND HUMID THROUGH MONDAY WITH HIGHS IN THE UPPER 80S TO
NEAR 90 AND HEAT INDICES IN THE LOW TO MID 90S.
- FEW FOR SHOWERS AND STORMS NEXT WEEK, PRIMARILY TUESDAY AND
WEDNESDAY YET CONFIDENCE REMAINS LOW ON EXACT TIMING AND
LOCATIONS TO BE IMPACTED.
DISCUSSION
ISSUED AT 205 PM EDT SAT AUG 9 2025
DOMINANT UPPER RIDGE WILL HOLD FIRM ACROSS THE OH/TN VALLEYS THROUGH
MONDAY BEFORE THE NRN EXTENT FLATTENS A BIT IN RESPONSE TO SHORTWAVE
PROGRESSING THROUGH SRN ON TUESDAY. THIS WILL DELAY INTRUSION OF
COMPOSITE SFC FRONTAL ZONE INTO THE AREA UNTIL LATER TUESDAY AND
GIVEN VERY WARM TEMPS ALOFT, CURTAIL ANY REALISTIC CHC FOR STORMS
UNTIL THEN.
OTHERWISE UPPER RIDGE REAMPLIFIES INTO NEXT WEEKEND THEN WITH
CONTINUED HEAT AND HUMIDITY AND FEW CHANCES FOR STORMS IN POORLY
FORCED AND HOSTILE ENV.
AVIATION /18Z TAFS THROUGH 18Z SUNDAY/
ISSUED AT 139 PM EDT SAT AUG 9 2025
PLENTY OF DRY AIR REMAINS KEEPING THE AREA IN VFR CONDITIONS THROUGH
THE PERIOD. ADDITIONAL TAF GROUPS WILL BE USED FOR INTRODUCING
10 KT SUSTAINED LEVELS IN AND OUT. TRAJECTORIES STAY
CONSISTENTLY OUT OF THE SOUTH THROUGH THE PERIOD.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...T
AVIATION...ROLLER
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