Marine Weather and Tide Forecast for Michigan City, IN

DISCUSSION
Issued at 504 AM EDT Tue Aug 4 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 through Wednesday, with partly to mostly clear skies, light winds, and highs in the 80s. Patchy fog is possible early this morning, but should improve shortly after sunrise.

Next chance for showers and storms looks to be Wed evening, continuing through early next week. 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. A cold front will move in from NW to SE, stalling along the southern border of our CWA by Saturday morning. We'll see return flow around high pressure over the Atlantic bring moisture from the gulf into the area during this time. Have around a 40-80 percent chance for showers and storms Wed PM into Friday, which is when chances begin to dwindle from NW to SE. Heavy rain is possible. Severe weather is not expected at this time. With the front stalling south of the CWA, we could end up dry Saturday outside of low 20 percent chances or so in the vicinity of the front. Some of the guidance generates precipitation in the afternoon with an incoming shortwave, but my confidence isn't too high in this. Highs will be in the upper 70s and 80s.

A couple additional waves move through the slightly troughed/zonal pattern aloft Sunday into Tuesday, bringing chances for additional showers/storms (20-40 percent). The best chances are associated with the stronger wave on Monday into Tuesday. Highs will be in the 80s.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 1257 PM EDT Tue Aug 4 2026

High pressure over Indiana will provide tranquil conditions during the TAF period, including wind less than 10 knots.
Increasing clouds late in the period, but remaining VFR, as a cold front slowly approaches from the west. Lingering dry air looks to preclude any -SHRA mention at this time. Cannot completely rule out patchy ground fog near daybreak Wednesday.

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