248
FXUS63 KDTX 021034
AFDDTX

Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
634 AM EDT Sat Aug 2 2025

.KEY MESSAGES...

- Seasonably cool through Saturday with highs near/below 80F.

- Surface-level Canadian wildfire smoke returns Saturday afternoon
and evening.

- Mostly dry conditions expected through early next week with
temperatures returning to near-normal levels.

&&

.AVIATION...

Surface high pressure will remain centered over Wisconsin and Lower
Michigan today. A relatively dry air mass in the lowest 6.0 kft agl
and high static stability in the midlevels will result in VFR
conditions throughout the period. While surface winds will
predominately remain light and variable, a northerly component will
be favored today while a southerly component will emerge tonight.

For DTW/D21 Convection...No thunderstorms will occur through the
duration of the TAF period.

THRESHOLD PROBABILITIES...

* None.

&&

.PREV DISCUSSION...
Issued at 340 AM EDT Sat Aug 2 2025

DISCUSSION...

A cool start relative to early August standards with temperatures
now in the 50s, aided by clear skies and the residual thermal impact
of a departing trough. A seasonably strong 1026 high pressure system
has and will continue to build right over the southern Great Lakes
through the morning and afternoon hours. Anticylonic flow will
direct warmer temperatures across the Plains into the central
Canadian Provinces and back down through the Great Lakes through
this weekend, which will bring increasing temperatures trends back
to near seasonal normals, warmest across the Tri-Cities for today.
Additionally, the strong subsidence will promote mostly sunny skies
this weekend, with some cu development possible through the Tri-
Cities. High pressure will weaken over the Appalachians and
continental northeast into early next week with a secondary high
pressure building in across eastern Ontario and Quebec, with the
western periphery extending through Michigan. This brings what will
likely be an extended period of dry weather through the forecast
period. Moisture quality will gradually increase into the midweek
period, bringing low end chances (<20%) for a shower or thunderstorm
with aid from a shortwave or weak lake boundary. The diffuse upper-
level pattern and lack of upper jet support precludes and higher PoP
mentions at present time.

MARINE...

High pressure will continue to hold over the Great Lakes this
afternoon bringing light northerly winds and lower wave heights. The
high will settle over the region resulting in a period of benign
marine weather through the upcoming weekend.

&&

.DTX WATCHES/WARNINGS/ADVISORIES...
MI...None.
Lake Huron...None.
Lake St Clair...None.
Michigan waters of Lake Erie...None.
&&

$$

AVIATION.....CB
DISCUSSION...AM
MARINE.......DRK/SS


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