104
FXUS63 KIWX 261833
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
233 PM EDT MON OCT 26 2026
KEY MESSAGES
- SOME PATCHY FOG POSSIBLE ESPECIALLY FOR SOUTHEASTERN PORTIONS
OF THE AREA OVERNIGHT TONIGHT. A FEW LOCATIONS COULD BECOME
DENSE.
- WARM AND DRY CONDITIONS PERSIST FOR MUCH OF THIS WEEK WITH
HIGHS IN THE 70S AND LOWS AROUND 50.
- THERE IS A CHANCE FOR LIGHT RAIN NEAR LAKE MICHIGAN ON
THURSDAY WITH A BETTER CHANCE FOR MORE WIDESPREAD RAIN EARLY
NEXT WEEK.
DISCUSSION
ISSUED AT 158 PM EDT MON OCT 26 2026
FAIRLY QUIET PATTERN CONTINUES ACROSS THE AREA. MAIN CONCERN
FOR THIS SHIFT HAS BEEN THE POTENTIAL FOR FOG OVERNIGHT TONIGHT
INTO TOMORROW MORNING. A WEST TO EAST WEAK STATIONARY BOUNDARY
FEATURE CURRENTLY IS IN PLACE OVER NORTHERN IN. RIGHT NOW THE
CURRENT THINKING IS THAT THE SOUTHWESTERN PORTIONS OF THE CWA
HAVE THE BETTER CHANCE AT FOG AS WINDS FURTHER NORTH AND EAST
LOOK TO BE A BIT STRONGER KEEPING THE LOWER LEVELS BETTER MIXED
AND AMOUNT OF MOISTURE WILL ALSO BE LOWER IN THOSE LOCATIONS
WHICH WILL HELP TO KEEP FOG DEVELOPMENT AT BAY. THE OTHER
QUESTION IS HOW MUCH MID LEVEL CLOUDS ASSOCIATED ALONG THE
BOUNDARY DEVELOPS WHICH WOULD ALSO HINDER RADIATIONAL COOLING.
THAT IS WHY THERE IS A BIT OF UNCERTAINTY WITH THIS FORECAST IN
PARTICULAR AS ANY WAVERING OF THE BOUNDARY WOULD CHANGE THINGS.
SO WILL BE KEEPING A CLOSE EYE ON THINGS TONIGHT.
OTHERWISE, DRY CONDITIONS WILL PRIMARILY CONTINUE WITH A FAIRLY ZONAL
FLOW ALOFT IN PLACE THROUGH THE REMAINDER OF THE WEEK. HOWEVER,
ON THURSDAY A WEAK DISTURBANCE RIPPLES THROUGH JUST TO THE NORTH
OF THE AREA AND MAY BRING LIGHT RAIN SHOWERS AND EVEN A RUMBLE
OF THUNDER FOR AREAS MAINLY NORTH OF US-6 AND ESPECIALLY FOR
AREAS NEAR AND ADJACENT TO LAKE MICHIGAN. TEMPERATURES THROUGH
THE WEEK LOOK TO REMAIN ABOVE NORMAL WITH HIGHS IN THE 70S AND
LOWS GENERALLY IN THE UPPER 40S TO MID 50S. NEXT WEEK THE LONGER
RANGE GUIDANCE DOES SHOW THE PATTERN IN PLACE NOW BEGINNING TO
BREAK DOWN AND BECOMING POTENTIALLY MORE ACTIVE. THE 6-10 DAY
OUTLOOK DOES SHOW ABOVE AVERAGE CHANCES FOR PRECIPITATION AND
MUCH ABOVE NORMAL TEMPERATURES.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
ISSUED AT 1235 PM EDT MON OCT 26 2026
A WEAK COLD FRONT IS SEEPING INTO FAR NORTHWEST INDIANA THIS
AFTERNOON. THROUGH TIME, THIS WILL ALLOW WINDS TO VEER AND
BECOME NORTHEASTERLY TONIGHT, FOLLOWED BY SOUTHEASTERLY TUESDAY.
NO RAIN IS EXPECTED WITH THIS FRONT. MARINE FOG FROM LAKE
MICHIGAN WILL BE MONITORED THIS AFTERNOON, BUT THIS IS SO FAR
SEEPING SOUTHWEST. TONIGHT, WE'LL MONITOR FOR ANY MARINE FOG
FROM LAKE ERIE (LOW CONFIDENCE).
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...ANDERSEN
AVIATION...BROWN
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