826
FXUS63 KIWX 051846
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
246 PM EDT FRI SEP 5 2025
KEY MESSAGES
- MAINLY DRY OVER THE NEXT 7 DAYS. ONLY A 20% CHANCE OF SHOWERS
OR SPRINKLES NORTH OF US-6 SATURDAY NIGHT.
- COOL TEMPERATURES THIS WEEKEND TREND WARMER, INTO THE 80S, BY
THE MIDDLE OF NEXT WEEK.
- DANGEROUS SWIMMING CONDITIONS EXPECTED FOR LAKE MICHIGAN
BEACHES THROUGH SUNDAY.
DISCUSSION
ISSUED AT 244 PM EDT FRI SEP 5 2025
A 992MB LOW IS SWIRLING OVER NORTHERN ONTARIO, ITS COLD FRONT NOW
EAST OF OUR AREA. BREEZY WESTERLY WIND TODAY SUBSIDES NOT ONLY WITH
A LOSS OF DAYTIME MIXING BUT WITH THE 45 KNOT 850-MB JET DEPARTING
TO THE EAST AS WELL. TONIGHT, CLOUDS ASSOCIATED WITH A WEAK LOW
MOVING THROUGH THE MID-MISSISSIPPI WILL PROVIDE SOME INSULATION
OVERNIGHT HELPING TO KEEP TEMPERATURES FROM BOTTOMING OUT, BUT
STILL NEARLY 10 DEGREES BELOW NORMAL.
BROAD TROUGHING IN REMAINS IN PLACE THROUGH THE WEEKEND WITH THIS
LARGE UPPER-LOW LINGERING OVER THE EASTERN GREAT LAKES. CAN'T RULE
OUT LAKE EFFECT SHOWERS SATURDAY NIGHT OR SUNDAY AS AN EMBEDDED
SHORTWAVE RIPPLES EAST ACROSS LAKE MICHIGAN. DURATION WILL BE
BRIEF WITH HIGH PRESSURE QUICKLY COMING IN TO DISTURB
EQUILIBRIUM LEVELS. HIGH PRESSURE REMAINS IN PLACE THROUGH THE
COMING WEEK PROMISING DRY CONDITIONS (AND AN INCREASING RISK OF
DROUGHT). TEMPERATURES WILL GRADUALLY WARM BACK INTO THE 80S BY
MIDWEEK AS THE WESTERN US RIDGE FINALLY TRACKS EAST.
AVIATION /18Z TAFS THROUGH 18Z SATURDAY/
ISSUED AT 1215 PM EDT FRI SEP 5 2025
WEST WINDS WILL GUST 25-30 KNOTS AT TIMES THIS AFTERNOON BEHIND
A COLD FRONT. LOSS OF DIURNAL MIXING AND A DIMINISHED PRESSURE
GRADIENT ALLOWS WINDS TO QUICKLY SUBSIDE TO 5-10 KNOTS BY EARLY
THIS EVENING. VFR OTHERWISE THROUGH THE PERIOD.
IWX WATCHES/WARNINGS/ADVISORIES
IN...BEACH HAZARDS STATEMENT THROUGH LATE TONIGHT FOR INZ103.
OH...NONE.
MI...BEACH HAZARDS STATEMENT THROUGH LATE TONIGHT FOR MIZ177-277.
MARINE...SMALL CRAFT ADVISORY UNTIL 5 AM EDT SATURDAY FOR LMZ043-046.
DISCUSSION...BROWN
AVIATION...STEINWEDEL
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