990
FXUS63 KDTX 291858
AFDDTX

Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
258 PM EDT Fri Aug 29 2025

.KEY MESSAGES...

- Below average temperatures persist into the upcoming weekend,
although a gradual warming trend will commence Saturday.

- Dry conditions expected through Labor Day and into the middle of
next week.

&&

.DISCUSSION...

Seasonably cool conditions entrenched locally late this afternoon,
as a minimum in mean thickness glances across the region under
prevailing mid level northwest flow on the backside of high
amplitude troughing centered over the east coast. Drying profile
under this pattern will translate into reduced cloud coverage and
open the door for a more sizable nocturnal cooling response tonight,
as high pressure builds in. Lows Saturday morning targeting a
broader distribution in readings throughout the 40s - or a solid 10-
15 degrees below average.

Deep layer stability held within existing low level ridging offers
an extended stretch of benign weather throughout the upcoming
holiday weekend period. Limited moisture quality throughout the
column lends to a high degree of insolation potential overall.
Gradual moderation of the cooler resident thermal profile with time
under full sunshine and modest upper height rises. This lands
afternoon temperatures invof of average by the back half the
weekend, with highs of mid to upper 70s. Favorable radiational
cooling environment maintains well below normal temperatures at
night. Lows upper 40s to lower 50s.

&&

.MARINE...

A high pressure system will settle over the Great Lakes today and
will hold steady through the weekend. This will alleviate wind
speeds through the day, leading to more tranquil conditions into
early next week. The next chance for more active conditions will
enter during the mid to late week timeframe as a low pressure/cold
front nears the Great Lakes.

&&

.PREV DISCUSSION...
Issued at 122 PM EDT Fri Aug 29 2025

AVIATION...

Northerly flow off Lake Huron has led to a healthy coverage of
diurnal cumulus across the terminal corridor. Ceilings hold in lower
VFR, sub 5kft, before clouds diminish this evening with the loss of
daytime heating. High pressure fully expands over the region tonight
and drifts overhead for Saturday. This keeps winds light and more
variable direction as well as keeping diurnal cu more muted compared
to this afternoon.

For DTW/D21 Convection...No thunderstorms during the period.

THRESHOLD PROBABILITIES...

* High for ceilings at or below 5000 feet through early evening.


&&

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

$$

DISCUSSION...MR
MARINE.......AM
AVIATION.....KDK


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