409
FXUS63 KIWX 251643
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1243 PM EDT MON MAY 25 2026
KEY MESSAGES
- DRY AND TRENDING WARMER TODAY INTO TUESDAY. LOW RAIN CHANCES
(10-30%) RETURN ON WEDNESDAY.
- SEASONABLE TEMPERATURES AND MAINLY DRY CONDITIONS THURSDAY
THROUGH NEXT WEEKEND.
DISCUSSION
ISSUED AT 351 AM EDT MON MAY 25 2026
IN THE SHORT TERM, DEVELOPMENT OF FOG OVER THE NORTHERN HALF OF
OUR CWA THIS MORNING. CURRENTLY HAVE A DENSE FOG ADVISORY ISSUED
FOR COUNTIES GENERALLY NORTH OF US-30 AS THE EXPECTATION FOR
DENSE FOG HAD INCREASED WITH DECENT RADIATIONAL COOLING
CONDITIONS WITH CLEARING SKIES, LIGHT WINDS, AND MOIST LOW
LEVELS (SURFACE DEW POINTS IN THE 50S). LATEST AUTOMATED
VISIBILITY REPORTS HAVE BEEN SHOWING VISIBILITY VALUES DROPPING
STEADILY OVER THE LAST FEW HOURS MAINLY OVER THE NORTHERN HALF
OF OUR CWA. REPORTS OF LESS THAN 1/4 MILE VISIBILITIES AND MANY
LOCATIONS AT OR NEAR 1/2 TO 3/4 MILE. WILL CONTINUE TO MONITOR
THROUGH THIS MORNING FOR ANY EXTENSION OF THE ADVISORY AREA BUT
AT THIS TIME HAS HELD FAIRLY WELL.
A DECENT DAY WEATHER-WISE WILL SHAPE UP FOR THE MEMORIAL DAY
HOLIDAY WITH WARMING TEMPERATURES INTO THE UPPER 70S TO LOW 80S,
DRY WEATHER, AND MOSTLY SUNNY SKIES. PERHAPS A BIT STICKY WITH
DEW POINTS STILL IN THE 50S. TUESDAY LOOKS TO BE FAIRLY SIMILAR
WITH SLIGHTLY WARMER TEMPERATURES AND INCREASING CLOUDS THROUGH
THE DAY. BY WEDNESDAY MORNING A VERY SUBTLE SHIFT IN A MORE
MOIST AIRMASS WILL SHIFT SLIGHTLY NORTHWARD WITH RIDGING
BUILDING OVER THE SOUTHEAST AND NORTHWARD THROUGH THE CENTRAL
CONUS WILL INTO CENTRAL CANADA. THIS WILL SLIGHTLY INCREASE THE
HUMIDITY LEVELS ACROSS THE AREA (DEW POINTS IN THE LOW TO MID
60S). THIS WILL BRING SLIGHT CHANCES OF RAIN SHOWERS AND PERHAPS
A RUMBLE OR TWO OF THUNDER MAINLY SOUTH OF US-30 BUT MOST
LIKELY FOR AREAS SOUTH OF US-24. AT THE SAME TIME A SHORTWAVE
TROUGH MOVING SOUTHEAST OVER THE GREAT LAKES REGION INTO OHIO
RIVER VALLEY WILL BRING SLIGHT CHANCES OF SHOWERS/THUNDERSTORMS
FOR OUR FAR NORTHEASTERN PARTS OF THE CWA.
OTHERWISE, THE REMAINDER OF THE WEEK INTO THE WEEKEND LOOKS DRY
AND WILL REMAIN WARM (HIGHS IN THE UPPER 70S TO LOW 80S) WITH
THE PREVIOUSLY MENTIONED RIDGING STRENGTHENING AND DEVELOPS A
SYNOPTIC OMEGA TYPE BLOCKING SET-UP ACROSS THE CENTRAL CONUS.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
ISSUED AT 1239 PM EDT MON MAY 25 2026
HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL CONTINUE TO
PROMOTE GENERALLY TRANQUIL CONDITIONS. HIGH CLOUD ARE STREAMING
IN FROM LOW PRESSURE OVER THE TENNESSEE VALLEY, WHILE A MID-
LEVEL DECK IS NOTED SEEPING FROM SOUTHERN WISCONSIN.
TONIGHT, FOG APPEARS PROBABLE AT KFWA WHERE DEW POINT
DEPRESSIONS AND SUBSEQUENT CROSSOVER TEMPERATURE IS LOWER THAN
KSBN. THEREFORE, HAVE CONTINUED THE INHERITED BR.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...ANDERSEN
AVIATION...BROWN
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