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KEY MESSAGES

- Low shower chances today, followed by an extended period of dry weather.

- Temperatures gradually cool close to late May averages.

DISCUSSION

Issued at 318 AM EDT Wed May 27 2026

A more amplified pattern will continue to evolve through the end of the week and into the weekend, with northern Michigan remaining positioned between expansive ridging centered across the central CONUS/ Canada and continued troughing deepening over the eastern Great Lakes and Northeast. This setup will keep a predominantly north to northeast low-level flow in place for a few days, allowing drier and cooler Canadian air to gradually filter south into the region, supporting a steady cooling trend through the remainder of the week into early weekend.

A weak cold front will continue to track through the area this morning and drop further south across the area today into tonight. Moisture remains limited, though there still appears to be enough forcing combined with modest diurnal instability to support at least scattered showers and perhaps a rumble of thunder in the afternoon/evening. Overall, coverage still looks rather limited with no appreciable rainfall expected. Temperatures today will still remain relatively warm ahead of a cooler air intrusion, with highs generally in the upper 70s to mid/upper 80s, warmest further south and away from shorelines.

Surface high pressure gradually settles across the Great Lakes Thursday into Friday beneath increasing subsidence aloft as the aforementioned ridge/trough inflection point becomes established over the region. This should support mainly dry weather along with temperatures settling closer to late May normals. Highs through the end of the week are expected to generally range through the 70s to low 80s with overnight lows falling back into the 40s for may locations.

Attention then turns toward another potentially stronger shortwave trough digging south into the eastern Great Lakes later Friday into Saturday, which may deliver a reinforcing shot of cooler air into northern Michigan along with another opportunity for a few light showers. Guidance continues to trend toward cooler daytime temperatures Saturday, especially across northeast Lower and eastern Upper where highs may struggle to reach the upper 60s, while areas farther southwest likely remain milder in the low to mid 70s.

Beyond that, the broader pattern begins to slowly relax heading into Sunday and early next week, allowing temperatures to gradually moderate back toward seasonal normals for the beginning of June. Overall precipitation chances continue to appear fairly limited through the extended as surface high pressure remains a dominant feature.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 639 AM EDT Wed May 27 2026

VFR conditions are anticipated across the area through the issuance period. Primarily light north-component winds are expected today with the potential for lake breeze formation to push inland this afternoon. Light north-northeast winds look to stay in place overnight.

APX WATCHES/WARNINGS/ADVISORIES

MI...None. MARINE...None.