Area Forecast Discussion
Issued by NWS Northern Indiana
Issued by NWS Northern Indiana
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404 FXUS63 KIWX 251820 AFDIWX Area Forecast Discussion National Weather Service Northern Indiana 220 PM EDT Wed Sep 25 2024 .KEY MESSAGES... * Isolated showers possible this afternoon. * Rain showers associated with a tropical system enter the forecast late Friday afternoon through the weekend. * Seasonable temperatures are replaced by a temporary dose of fall by the middle of next week. && .DISCUSSION... Issued at 220 PM EDT Wed Sep 25 2024 Isolated showers will remain possible near a weak trough axis across northern IN and srn MI this afternoon given sufficient boundary layer moisture and diurnal heating. This trough washes out tonight into tomorrow with drier easterly winds developing on the southern fringe of a low level anticyclone building northeast into the Great Lakes. Clearing and winds becoming light/variable for a time later tonight may allow for some patchy ground fog to develop across mainly nw IN and portions of southern MI. Main focus into Friday and the weekend will turn to Hurricane Helene remnants being absorbed into a leftover upper low over the western TN Valley. Friday likely remains dry with northeast winds becoming breezy in response to the sfc low center pivot north-northwest into Kentucky for a time. A few bands of light rain may clip the area on the northern fringe later Friday into Saturday, best chances south of US 30/24. Seasonable temperatures expected otherwise before a cold front brings a shot of fall-like temps by the middle of next week. && .AVIATION /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 1216 PM EDT Wed Sep 25 2024 Stratocu expected to mix into VFR at or shortly after issuance this afternoon. Isolated showers are also possible near a weak trough axis this afternoon, though point chances remain too low to include in the TAF. Drier air infiltrates the area later tonight into tomorrow as high pressure develops toward the Great Lakes region. Low xover values and light/variable winds under a clearing sky does hint at the risk for shallow BR/FG formation later tonight at KSBN otherwise. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...None. OH...None. MI...None. MARINE...None. && $$ DISCUSSION...Steinwedel AVIATION...Steinwedel