202
FXUS63 KIWX 231039
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
639 AM EDT MON MAR 23 2026
KEY MESSAGES
- LARGE TEMPERATURE SWINGS EXPECTED THROUGH THE NEXT 7 DAYS
WITH THE WARMEST DAY ON THURSDAY AND COOLEST TODAY AND FRIDAY.
- ANOTHER STRONG FRONT ON THURSDAY WILL BRING CHANCES FOR
SHOWERS AND THUNDERSTORMS.
DISCUSSION
ISSUED AT 242 AM EDT MON MAR 23 2026
THE REGION WILL CONTINUED TO BE PLAGUED WITH THESE DRAMATIC CHANGES
IN TEMPERATURE AS UPPER LEVEL RIDGING ACROSS THE SW U.S EXPANDS EAST
THROUGH THE WEEK, LIMITING SIGNIFICANT AMPLIFICATION OF A SERIES OF
NORTHERN STREAM WAVES THAT WILL MOVE EAST IN THE COMING WEEK.
IN THE WAKE OF THE DEPARTING TROUGH, SOME WEAK CONVERGENCE AND
LINGERING POST FRONTAL MOISTURE HAS RESULTED IN AN AREA OF
DRIZZLE ACROSS CENTRAL PORTIONS OF THE AREA. HAVE ADDED PATCHY
DRIZZLE FOR THE TIME BEING WITH TEMPS LIKELY HOVERING NEAR OR
JUST ABOVE FREEZING. CAA WILL CONTINUE WITH HIGHS TODAY 20 TO
30 DEGREES OR MORE COLDER (MID 30S NEAR LK MI TO MID 40S INLAND)
THAN YESTERDAY. TEMPS THEN REBOUND INTO MID WEEK WITH THE NEXT
TROUGH SET TO MOVE IN THURSDAY/THURSDAY NIGHT. AHEAD OF THIS,
TEMPERATURES WILL LIKELY BE IN THE 70S AND MED RANGE MODELS
HINTING AT BETTER LOW LEVEL MOISTURE (60 DEGREE OR HIGHER
DEWPOINTS) AND A MORE FAVORABLE TIMING OF THE COLD FRONT TO
POSSIBLY POSE A THREAT OF MORE WIDESPREAD SHOWERS/STORMS AND MAY
SOME STRONG TO SEVERE STORMS. PLENTY OF TIME TO WATCH, BUT
SOMETHING TO MONITOR IN THE COMING DAYS.
IN THE WAKE OF THIS SYSTEM, YET ANOTHER LARGE DROP IN TEMPS OCCURS
FRIDAY WITH SLOW MODERATION INTO THE WEEKEND.
AVIATION /12Z TAFS THROUGH 12Z TUESDAY/
ISSUED AT 637 AM EDT MON MAR 23 2026
COLD ADVECTION CAUSED THE MVFR STRATUS LAYER THIS MORNING. WITH
HIGH PRESSURE WORKING INTO THE AREA TODAY, PLENTY OF DRY AIR
TAKES OVER THIS AFTERNOON AND EXPECT VFR CONDITIONS TO PREVAIL
BY MIDDAY AT FWA AND EARLIER AT SBN.
WITH THE CAA-AIDED MIXING, SUSTAINED WINDS STAY GREATER THAN 10 KTS
AND GUSTS WILL BE STRONGER THAN 20 KTS UNTIL THE EVENING. THE
APPROACHING HIGH PRESSURE CENTER ALLOWS TRAJECTORIES TO TURN MORE
EASTERLY OVERNIGHT TONIGHT.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 8 PM EDT THIS EVENING FOR LMZ043-
046.
DISCUSSION...FISHER
AVIATION...ROLLER
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page