textproduct: Detroit/Pontiac

KEY MESSAGES

- Sunny and warmer Friday.

- Extended stretch of dry conditions with seasonable temperatures this weekend and into next week.

DISCUSSION

Highly amplified, blocked upper level pattern will offer an extended stretch of generally benign weather conditions this forecast period. Strong height falls consolidating over the northeast will keep broad, cyclonic mid level flow entrenched across the eastern third of the conus. Western periphery of this feature maintains persistent confluent flow aloft, effectively establishing an expansive area of deep large scale subsidence within low level anticyclonic flow locally. Net result is a high degree of insolation potential with limited cloud production to finish the work week. Minor, brief increase in upper heights affords a modest warming trend Friday from readings noted today. Highs projected to arrive within the 80 to 85 degree range most locations. Noteworthy height falls to the east will send a backdoor cold front through early Friday night. Little more than a brief increase in cloud cover associated with this feature, given lack of better moisture quality/depth or forced ascent.

Cooler post-frontal conditions within prevailing low level northeast flow Saturday, most notably downstream of the colder lake Huron waters given the onshore flow. Highs mid 60s to around 70 degrees. Dry and seasonable conditions will then prevail as high pressure retakes control Sunday into early next week. Little variation in conditions until the latter half of next week, when upper ridging begins to take greater influence. This likely leads to some degree of a warming trend, while still limiting rainfall potential.

MARINE

High pressure weakens this evening through Friday as it slowly drifts over the southern Great Lakes. Light and variable winds are expected in the presence of the high pressure center. Low pressure then tracks from Quebec into New England Friday evening, drawing a cold front south and causing winds to veer to the northeast early Saturday morning. The frontal passage may briefly bring winds and waves to Small Craft Advisory criteria Friday night into Saturday, possibly lingering into the afternoon over Saginaw Bay where flow aligns with fetch. High pressure expands south from Ontario into the weekend, reinforcing a period of dry weather and quiet marine conditions outside of the bay.

PREV DISCUSSION

Issued at 100 PM EDT Thu May 28 2026

AVIATION...

High pressure dominates through the period with prevailing clear skies. Northeast winds go calm overnight as the center of the high passes through from north to south. Light wind then emerges out of the west Friday afternoon as the high settles over the southern Great Lakes.

D21/DTW Convection...Thunderstorms not expected through this TAF period.

DTW THRESHOLD PROBABILITIES...

* None.

DTX WATCHES/WARNINGS/ADVISORIES

MI...None. Lake Huron...None. Lake St Clair...None. Michigan waters of Lake Erie...None.