746
FXUS63 KIWX 221713
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
113 PM EDT TUE SEP 22 2026
KEY MESSAGES
- EXTENDED STRETCH OF SEASONABLY COOL CONDITIONS WILL PERSIST
THROUGH THE WEEKEND.
- A FEW POCKETS OF LIGHT RAIN SHOWERS POSSIBLE TODAY INTO
WEDNESDAY, BEST CHANCES (20-30%) OVER NORTHEAST IN AND
NORTHWEST OH.
- DRY THURSDAY THROUGH THIS WEEKEND.
DISCUSSION
ISSUED AT 225 AM EDT TUE SEP 22 2026
A BROAD ~1030 MB SFC HIGH ANCHORED OVER ONTARIO, THE NORTHERN GREAT
LAKES AND QUEBEC WILL CONTINUE TO PROVIDE A FEED OF COOL
EASTERLY FLOW THROUGH THE REMAINDER OF THE WEEK. CLOUDS AND
POCKETS OF LIGHTER RAIN SHOWERS WILL ALSO REMAIN IN THE FORECAST
THROUGH WEDNESDAY AS DEEPER MOISTURE LINGERS IN THE LOWEST 10
KFT, AND AN UPPER LEVEL VORT OVER IOWA MEANDERS EAST INTO THE
LOWER GREAT LAKES. BEST CHANCES FOR MEASURABLE LIGHT RAIN
(20-30%) WILL BE THIS AFTERNOON INTO WEDNESDAY ALONG AND EAST
OF THE INTERSTATE 69 CORRIDOR WHERE SLIGHTLY BETTER MOISTURE
PROFILES WILL LINGER.
THE SECOND HALF OF THE WEEK INTO THE UPCOMING WEEKEND THEN FEATURES
MORE IN THE WAY OF SUNSHINE AND GRADUAL AIR MASS MODIFICATION AS THE
UPPER VORT EXITS OFF TO THE EAST, EVENTUALLY PHASING INTO A LARGER
LOW PRESSURE SYSTEM JUST OFF THE MID ATLANTIC COAST. THIS BLOCKING
PATTERN WILL FAVOR RIDGING/SUBSIDENCE OVER THE LOCAL AREA.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
ISSUED AT 107 PM EDT TUE SEP 22 2026
NARROW AREA OF DRIZZLE IS PASSING THROUGH KFWA AS OF THIS
WRITING. A LACK OF UPSTREAM RADAR RETURNS AND AUTOMATED
STATIONS INDICATE THIS DZ WILL BE SHORTLIVED. INSTEAD, SCATTERED
SHOWERS ARE FAVORED AFTER SUNRISE WEDNESDAY.
AT KSBN, CUMULUS CLOUDS ARE DEVELOPING TO THE NE WHILE DENSE
STRATUS FILLS IN FROM THE EAST. SATELLITE TRENDS SUGGEST VFR
CEILINGS IN THE NEAR-TERM, DECLINING OVERNIGHT OR PERHAPS
SOONER. RAIN APPEARS LESS LIKELY AT KSBN WITH WEAKER FORCING
NOTED ON THE CROSS SECTIONS.
IWX WATCHES/WARNINGS/ADVISORIES
IN...BEACH HAZARDS STATEMENT THROUGH LATE TONIGHT FOR INZ103.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...STEINWEDEL
AVIATION...BROWN
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page