707
FXUS63 KIWX 181807
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
207 PM EDT SUN MAY 18 2025
KEY MESSAGES
- BELOW NORMAL TEMPERATURES PERSIST THROUGH NEXT WEEKEND.
- PERIODS OF RAIN EXPECTED TUESDAY INTO WEDNESDAY.
DISCUSSION
ISSUED AT 207 PM EDT SUN MAY 18 2025
AN UPPER LEVEL RIDGE AXIS OVER THE CENTRAL CONUS WILL OVERSPREAD
TONIGHT INTO MONDAY, WHILE AT THE SFC DRY NORTHERLY WINDS VEER TO
THE EAST-NORTHEAST ON THE SOUTHERN FRINGE OF HIGH PRESSURE. THIS
WILL ALLOW COOL AND DRY CONDITIONS TO PERSIST WITH HIGH CLOUDS
LIKELY ON THE INCREASE TOMORROW IN ADVANCE OF AN APPROACHING
WARM FRONT.
SOME NEEDED RAIN STILL APPEARS LIKELY TUESDAY INTO WEDNESDAY AS THE
AFOREMENTIONED FRONT LIFTS INTO THE AREA AND LOW PRESSURE MEANDERS
EAST ALONG IT. WARM SECTOR REMAINS LOCKED UP TO THE SOUTH WITH ONLY
SLIGHT CHANCES FOR A FEW RUMBLES OF THUNDER ON MAINLY TUESDAY,
THOUGH THERE COULD BE SOME LOCALLY HEAVIER RAINFALL TOTALS,
MAINLY SOUTH OF US 30. BELOW NORMAL TEMPERATURES WILL BE THE
STORY OTHERWISE THROUGH THE REMAINDER OF THE PERIOD GIVEN A
SUPPRESSED/BLOCKED FLOW REGIME AS NEGATIVE UPPER LOWS EVENTUALLY
MERGE OVER THE CENTRAL/EASTERN GREAT LAKES LATE IN THE WEEK.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 144 PM EDT SUN MAY 18 2025
PREDOMINANTLY VFR CONDITIONS THROUGH THE TAF PERIOD, WITH PESKY
MVFR CEILINGS GRADUALLY LIFTING/DIMINISHING THROUGH THE
AFTERNOON. WINDS WILL LINGER OUT OF THE N-NW THROUGH LATE
EVENING BEFORE SHIFTING MORE NE INTO MONDAY. AFTER A PERIOD OF
MOSTLY CLEAR SKIES OVERNIGHT, EXPECT INCREASING HIGH CLOUDS INTO
MONDAY.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...NONE.
DISCUSSION...STEINWEDEL
AVIATION...MCD
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