Marine Weather and Tide Forecast for Haslett, MI

DISCUSSION
Issued at 309 PM EDT Mon Apr 21 2025

- Winds decreasing overnight

Water vapor images show a secondary upper PV max that has just crossed the Milwaukee area and entered southern Lake Michigan. This has been associated with continued gusts in excess of 35 knots. So, it definitely seems prudent to keep the wind advisory in effect as currently scheduled for now - although it can likely be cancelled prior to the slated 10 PM expiration time. Will defer to the evening shift to hammer out these details.

- Several Chances For Showers Mid to Late Week

Shortwave ridging aloft will introduce associated surface pressure ridging across the western Great Lakes for much of Tuesday. However, as noted previously we are looking at a warm front lifting north towards Lower Michigan. There will be a band of stronger westerly flow aloft in the vicinity, indicative of more isentropic sloping underneath. Waviness in the mid-level flow will induce isentropic ascent within this sloped regime, likely culminating in a band of showers and perhaps even storms around or south of the I-94 corridor beginning as early Tuesday evening. Given the elevated nature of precipitation and ephemeral aspects of the forcing, forecast certainty will be very limited during this time frame.

- Warm and wet Friday into Saturday, dry Sunday

There is better forecast certainty for showers and thunderstorms to overspread the area during this time as a well phased upper trough traverses the area. Upper mesoscale ridging ahead of the trough combined with placement in the warm sector may allow highs on Thursday to make a run towards 80 degrees across much of southwest Lower MI.

AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/
Issued at 123 AM EDT Tue Apr 22 2025

VFR conditions with winds blo 10 knots through Tuesday evening.
Some scattered showers could reach MKG during the afternoon but VFR conditions should still prevail.

MARINE
Issued at 309 PM EDT Mon Apr 21 2025

No changes to the Gale Warning at this time. This will eventually need to be replaced with a Small Craft Advisory since waves will meet or exceed those criteria much of tonight.

GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory until 2 AM EDT early this morning for LMZ844>849.