447
FXUS63 KIWX 131907
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
307 PM EDT MON OCT 13 2025
KEY MESSAGES
- AREAS OF FOG POSSIBLE AGAIN TONIGHT, ESPECIALLY EAST OF I-69.
- NEAR TO ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND WITH
HIGHS IN THE 60S AND 70S.
- SHOWERS LIKELY, THUNDERSTORMS POSSIBLE SATURDAY AND SUNDAY.
DISCUSSION
ISSUED AT 140 PM EDT MON OCT 13 2025
SHOWERS OVER NORTHEAST IL AND WI WERE WEAKENING AND ARE NOT
EXPECTED TO REACH THE FORECAST AREA. LIGHT EAST FLOW SHOULD
PREVAIL OVER MOST AREAS TONIGHT WITH A GOOD CHANCE FOR GROUND
FOG REDEVELOPING EAST OF I-69. HAVE ADDED PATCHY FOG IN THIS
AREA FOR LATE TONIGHT AND EARLY TUESDAY. OTHERWISE, AN UPPER
LEVEL RIDGE SHOULD BUILD EAST HELP KEEP HIGH TEMPERATURES CLOSE
TO 15 DEGREES ABOVE NORMAL INCLUDING THE MID TO UPPER 70S INTO
FRIDAY AS AS A LARGE POSITIVE HEIGHT ANOMALY PREVAILS FROM THE
OHIO RIVER TO HUDSON BAY. ANOMALOUSLY LARGE DIURNAL TEMPERATURE
RANGES SHOULD ACCOMPANY THIS PATTERN THROUGH FRIDAY GIVEN THE
ANTECEDENTLY DRY GROUND CONDITIONS AND DRY AIR OVER THE REGION
WITH DEW POINTS NEAR 50 DEGREES. DIURNAL RANGES MAY EXCEED 30
DEGREES UNTIL THE RIDGE PATTERN BREAKS DOWN LATE IN THE WEEK.
RAIN IS LIKELY OVER THE WEEKEND ALONG WITH THE CHANCE FOR
THUNDERSTORMS. SEVERE WEATHER IS NOT EXPECTED. WPC RAINFALL FOR
THE FORECAST AREA IS GENERALLY AROUND AN INCH FOR THE 7 DAYS.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
ISSUED AT 106 PM EDT MON OCT 13 2025
FOG HAS CLEARED AND VFR CONDITIONS WITH LIGHT EASTERLY WINDS
EXPECTED THROUGH THIS EVENING. THERE IS POTENTIAL FOR MVFR/BR
CONDITIONS IN FOG AGAIN TUESDAY MORNING AT BOTH KFWA/KSBN BUT
IT WON'T BE UNTIL AFTER 6Z. CONFIDENCE IS LOW SO DID NOT INCLUDE
AT THIS TIME.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...SKIPPER
AVIATION...COBB
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