Marine Weather and Tide Forecast for Traverse City, MI

DISCUSSION
Issued at 208 AM EDT Thu Oct 8 2026

Pattern Synopsis and Forecast:

Upper low and long wave trough across Canada will continue with depressed heights and cool air aloft over northern MI today. That being said, this feature will slowly retreat northward with time, being replaced with warmer temps aloft. There will still be steep enough lapse rates for a few showers, and this will be especially true across eastern upper in theory. Have POPs from basically near and just north of M-32 to the E UP with periodic shower chances. A small and subtle short wave on the southern most periphery of the trough may actually be the catalyst for a few showers this afternoon. Despite a somewhat similar thermodynamic environment compared to Wednesday, todays showers will not have the same spatial continuity nor vigor of yesterdays convection, due to the warmer temperatures aloft and lack of robust low level trigger. Expect largely isolated showers/low topped convection today across the aforementioned areas. Additionally, relatively tight pressure gradient between a sfc low pressure system in Canada (upper low)
and broad sfc high pressure across the Plains, relatively deep boundary layer heights, and a ribbon of 20-30KT H850 winds will result in breezy conditions through the day today.

A few showers may try to clip the E UP during the first half of the overnight, but any activity during the afternoon and evening hours should wane through the night in a general sense. Cool night expected as well with temps in the 30s across the interior.

Trough continues to evacuate to the northeast on Friday, replaced by increasing heights aloft. Consequently, expect a few degrees of warming compared to Thursday, along with dry conditions. This will be the start of the excellent weekend forthcoming. Heights continue to rise this weekend due in part to deep troughing diving over the PacNW. Sfc reflection will be an elongated, but dominant, low pressure system that meanders across the Plains and vicinity.
Meanwhile, high pressure shifts to the east across the Northeast.
Consequently, southerly winds are anticipated, breezy to windy at times as low level winds spread over N MI, with temperatures soaring into the 70s both weekend days. The only feature that will need to be watched will be the remnants of a tropical system that will impact the Gulf, which will move northeast across the OH Valley, then east across the Mid-Atlantic. This low pressure system should be disconnected enough from troughing to the north across Canada that it shoves off to the east and does not impact us that much. One location to watch for a stray shower would be Saginaw Bay. This would be on Sunday.

Heading into early next week, ridging builds across the Deep South, and more generally across portions of the Nations mid-section. At the same time, troughing across Ontario shifts southward, with associated frontal boundary and precipitation chances returning to northern MI. Current progged pattern suggests the best chance for rain will be Monday and Monday night, but this will be fine tuned going forward. Cold advection behind this system and frontal boundary will return temperatures back to seasonal normal by Tuesday, and really through the mid week time frame.

AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
Issued at 134 PM EDT Thu Oct 8 2026

VFR conditions for all terminals with VCSH near KCIU/KPLN/KAPN lasting through 22z. A brief MVFR cig is possible around this activity. W/NW winds of 9 to 15kts with G15 to 25kts will weaken by 00z. VCSH possible near KCIU after 04z, and couple result in a quick MVFR cig or two. Chances for impactful BR/FG near KCIU after 08z. Lighter winds and VFR conditions for all terminals after 12z through the end of the period.

APX WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory until midnight EDT tonight for LHZ345>349.
Small Craft Advisory until 8 PM EDT this evening for LMZ323- 341-342.
Small Craft Advisory until midnight EDT tonight for LSZ321-322.