425
FXUS63 KIWX 152311
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
611 PM EST MON DEC 15 2025
KEY MESSAGES
- MODERATING TEMPERATURES AND BREEZY AT TIMES THROUGH THURSDAY.
- PERIODS OF RAIN LATE WEDNESDAY NIGHT INTO THURSDAY, POSSIBLY
MIXING OR ENDING AS SNOW SHOWERS THURSDAY NIGHT INTO FRIDAY.
- WINDY AND BRIEFLY COLDER CONDITIONS ON FRIDAY.
DISCUSSION
ISSUED AT 122 PM EST MON DEC 15 2025
WARMING TEMPS REMAIN THE STORY THROUGH THURSDAY AS PACIFIC AIR
FLOODS THE LOWER 48 UNDER A MORE PROGRESSIVE, QUASI-ZONAL, FLOW
REGIME. SEVERAL SHORTWAVES WILL TRACK EAST WITHIN THIS FLOW, WITH A
TUESDAY NIGHT IMPULSE THROUGH THE NORTHERN GREAT LAKES SENDING A
WEAKENING FRONT INTO THE AREA EARLY WEDNESDAY. HEIGHT FALLS AND
ASCENT WITH THE UPPER WAVE DOES CLIP THE AREA, THOUGH MOST OF THIS
FORCING WILL GO TO MID-UPPER LEVEL SATURATION WITH A DRY FORECAST
RETAINED GIVEN A NOTABLE DRY LAYER BELOW ROUGHLY 700 MB.
THE NEXT PACIFIC WAVE WILL BE MUCH MORE AMPLIFIED ENCOURAGING
CYCLOGENESIS EAST THROUGH THE NORTHERN GREAT LAKES THURSDAY
INTO THURSDAY NIGHT. THIS WILL DRAW SOME GULF MOISTURE NORTHWARD
WITH PERIODS OF RAIN ANTICIPATED ALONG AND IN ADVANCE OF A
TRAILING COLD FRONT DURING THE DAY ON THURSDAY. A BRIEF SHOT OF
GUSTY WINDS AND CHANCES FOR SNOW SHOWERS THEN SWING THROUGH ON
THE BACKSIDE OF THE LOW INTO THURSDAY NIGHT AND FRIDAY.
AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/
ISSUED AT 604 PM EST MON DEC 15 2025
VFR CONDITIONS ARE EXPECTED THROUGH THE REMAINDER OF THIS TAF
FORECAST FOR BOTH KSBN AND KFWA. A DISTURBANCE MOVING OVER THE
NORTHERN GREAT LAKES/SOUTHERN CANADA WILL BRING SOME MID TO HIGH
LEVEL CLOUDS ACROSS BOTH TERMINALS OVERNIGHT THROUGH TUESDAY
AFTERNOON ALONG WITH SOME SHORT LIVED GUSTY SOUTHWEST WINDS,
GUSTS UP TO 20 KTS, AFTER 16Z TUE WHICH ARE EXPECTED TO BEGIN TO
TREND LOWER BY THE END OF THIS TAF PERIOD.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...STEINWEDEL
AVIATION...ANDERSEN
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