588
FXUS63 KIWX 060533
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1233 AM EST THU NOV 6 2025
KEY MESSAGES
- NORMAL TO ABOVE NORMAL TEMPERATURES INTO FRIDAY, WITH A TREND
TOWARDS SHARPLY COLDER TEMPERATURES THIS WEEKEND INTO EARLY
NEXT WEEK.
- A PERIOD OF RAIN SHOWERS IS EXPECTED LATE THURSDAY NIGHT INTO
FRIDAY. ADDITIONAL RAIN CHANCES EXIST LATE SATURDAY INTO
EARLY SUNDAY, POSSIBLY MIXING WITH A FEW SNOW FLAKES BEFORE
ENDING.
- LAKE EFFECT SNOW SHOWERS POSSIBLE SUNDAY NIGHT INTO MONDAY.
DISCUSSION
ISSUED AT 154 PM EST WED NOV 5 2025
BETWEEN THIS EVENING AND MONDAY EVENING, THE GENERAL PATTERN IS A
HIGH AMPLITUDE WAVE EMANATING FROM EAST ASIA ACROSS THE NORTH
PACIFIC AND INTO THE CONUS IN A COMBINATION BETWEEN A JET RETRACTION
AND A POLEWARD SHIFTED NORTH PACIFIC JET PATTERN. VARIOUS CYCLONIC
WAVE BREAKS OCCUR ACROSS THE EASTERN NORTH PACIFIC WHICH
ENHANCE THE RIDGE ACROSS THE WESTERN CONUS AND THIS ALSO BUILDS
THE TROUGH ACROSS THE EASTERN CONUS.
CLOSER TO HOME AND TO THE SURFACE, A DEPARTING MID LEVEL SHORTWAVE
TRANSITIONS TO SURFACE HIGH PRESSURE THIS AFTERNOON AND INTO
THURSDAY. THIS PROVIDES DRY, BUT COOLER WEATHER BEHIND A COLD FRONT
WITH HIGHS DROPPING BACK INTO THE 50S FROM THE LOWS 60S AND LOWS
FROM THE 40S BACK INTO THE 30S. ALL OF THIS IS MORE SEASONABLE
WEATHER FOR THIS TIME OF YEAR. WARM ADVECTION IS QUICK TO ARRIVE
THURSDAY AFTERNOON AND EVENING WITH GUSTS TO 20 MPH POSSIBLE SO A
RETURN TO THOSE AFOREMENTIONED 60S AND 40S IS LIKELY FOR FRIDAY.
CLOUDS AND EARLY-ARRIVING RAIN, ALONG WITH SOME 20 TO 30 MPH GUSTS-
STRONGEST SOUTH OF US-24, CHARACTERIZE OUR FRIDAY. RAIN IS LIKELY
OUT OF THE AREA DURING THE AFTERNOON.
850 MB THETA-E PLOTS INDICATE THE COLD AIR PUSH WAITS UNTIL SUNDAY/
MONDAY TIME FRAME. THERE IS ONE SYSTEM THAT IS ABLE TO PUSH EASTWARD
ALONG THE TEMP GRADIENT SATURDAY AND DEEPEN AS IT DOES SO. CURRENT
PROGRESSIONS KEEP THE INSTABILITY SOUTH OF THE AREA TO REMOVE ANY
SEVERE THREAT. IT APPEARS THE HEAVIEST OF THE RAIN THREAT ARRIVES
SATURDAY NIGHT, FORCED ALONG BY THE F-GEN BANDING/DEFORMATION AREA.
PERHAPS, IF THE COLD AIR RUSHES INTO THE AREA QUICK ENOUGH BEFORE
THE DRY ARRIVES, THERE COULD BE A BRIEF PERIOD OF SNOW SHOWERS THAT
MIX IN SUNDAY MORNING. THEN, AS A SHORTWAVE DIVES SOUTHWARD THROUGH
LAKE MI BY LATER SUNDAY, THERE'S ENOUGH LAKE ENHANCED INSTABILITY TO
POTENTIALLY SEE SOME INCREASED CLOUDINESS AND PERHAPS SOME LAKE
ENHANCED SNOW SHOWERS. THERE'S POTENTIAL TO GET A ROBUST LAKE
RESPONSE, ESPECIALLY AT NIGHT, BUT THE PIECES HAVE TO COME TOGETHER.
LOWS MONDAY MORNING DROP INTO THE LOW TO MID 20S WITH MID 30S FOR
HIGHS.
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/
ISSUED AT 1226 AM EST THU NOV 6 2025
THE LOW LEVELS CONTINUED TO REMAIN QUITE DRY AND VOID OF LOW
CLOUDS. SYNOPTIC MIXING IS EXPECTED TO CAUSE WIND GUSTS UP TO 20
KNOTS AT THE SURFACE AT SBN AFTER 00Z. IN ADDITION TO THE GUSTY
WINDS AT THE SURFACE, LOW LEVEL WIND SHEAR IS EXPECTED AND HAS
BEEN INCLUDED IN THE SBN TAF AFTER 00Z.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 4 AM EST EARLY THIS MORNING FOR
LMZ043-046.
DISCUSSION...ROLLER
AVIATION...SKIPPER
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