Marine Weather and Tide Forecast for Pottawattamie Park, IN

DISCUSSION
Issued at 623 AM EDT Mon Aug 3 2026

An upper level ridge/sfc high pressure builds in today and lingers through Wed. Because of this, we have a nice break in active weather today into Wednesday, with partly to mostly clear skies, light winds, and highs in the upper 70s, low-mid 80s. Patchy fog is possible early this morning, but should improve shortly after sunrise.

A beach hazards statement remains in effect through 8 am EDT for Lake MI beaches along the Berrien Co, MI and La Porte Co, IN shoreline. Waves per latest buoy obs were around 2-4 feet with 5-7 second periods (45026 Cook Nuclear/45168 South Haven, MI; sadly 45170 at Michigan City, IN is not reporting this morning). Allowed the small craft to expire as planned at 5 am EDT this morning, and I suspect we will be able to drop the BH.S at 8 am EDT as planned, with waves dropping to around 1-2 feet by early afternoon. Have a high swim risk for La Porte/Southern Berrien County this morning, dropping to a moderate swim risk after the statement expires.
Despite wave heights dropping, strong currents are likely to be present through at least early afternoon (especially southern Berrien/La Porte). By the 4-5 pm update this aft/eve we should be low swim risk at most if not all of the beaches. With the high waves and winds, we had some upwelling at the beaches-so water temps dropped from around 66 degrees yesterday to about 57 degrees today.
Pretty chilly for August!

Next chance for showers and storms looks to be Wed night, continuing through the weekend. Our upper level ridge drifts eastward and a broad trough stemming from a closed low over Hudson Bay takes hold of the Great Lakes region. At the surface, a cold front moves in Wed PM and stalls out in northern Indiana/NW OH/Lower MI/IL. By Friday, return flow stemming from high pressure system off the eastern seaboard will bring warm air/moisture northward, which will re- orient the front (originally from SW to NE) to be more W-E (generally along I 80-90). This could serve as a focus for continued precipitation chances Friday into Saturday night. Models don't exactly agree on the broader pattern/precipitation location in this late week/weekend period, so kept chances limited to 15-30 percent later Friday afternoon into Saturday/Sunday.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
Issued at 1211 PM EDT Mon Aug 3 2026

High pressure will continue to provide light winds and primarily VFR conditions. There is some potential for patchy, shallow, ground fog once again toward daybreak tomorrow, though confidence in this impacting the terminals remains too low for a mention in the TAF.

IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.