Marine Weather and Tide Forecast for Michigan City, IN

DISCUSSION
Issued at 414 AM EDT Fri May 8 2026

An anomalously cool pattern will persist as an upper low lingers over eastern Canada. 500 mb heights were around 400 meters below normal from Hudson Bay into the Upper Great Lakes. Yesterday's temperatures were close to 10 degrees below normal. Short wave energy moving southeast in the cool pattern will generate showers through Saturday as the atmospheric environment remains saturated or close to saturation from the surface to above 30,000 ft. Another in the series of these waves will bring scattered to numerous showers to the forecast area today. There is above average of general model agreement with timing and location of the showers this afternoon into early tonight. The favored locations for rain will be south of the Michigan border.

This cool pattern will bring more chances for frost early next week.
Temperatures are forecast to drop into the mid and upper 30s mainly Sunday night and Monday night. Vegetation development is likely advanced for this time of year given the large number of growing degree days (already near or exceeding 400 south of the Michigan border). Headlines will likely be needed to cover low temperatures these cold nights.

AVIATION /06Z TAFS THROUGH 06Z SATURDAY/
Issued at 200 AM EDT Fri May 8 2026

A lull in the rain shower activity is occurring early this morning with departure of initial short wave trough and stronger low level fgen forcing. Scattered to numerous showers are lining up back to the west from KMUT to KPNT in the vicinity of leftover stronger low level theta-e gradient. Advective forcing through the early morning hours should be suppressed west and south of the terminals, while northern Indiana continues to experience a break in the mid/upper level forcing.
This should yield low probabilities of rain through daybreak. By mid-late morning and into this afternoon, rain chances will increase again, particularly at KFWA which will be more favorably aligned with advective forcing associated with the sharp low level theta-e gradient. Another mid/upper level short wave will also track into northern Indiana this afternoon enhancing rain chances. KSBN should be positioned far enough north of the forcing for just low probs of rain late morning/early afternoon and will continue with PROB30 mention from previous forecast. Rain showers should taper mid-late evening at KFWA as cool front feature shifts across NE Indiana.
An isolated storm is possible at KFWA this afternoon, but very weak and shallow instability make this probability quite low (~10%). Some stratus and fog is likely to develop behind sfc trough feature tonight, with best chance of MVFR cigs/vsbys at KFWA for latter portions of this period.

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