Brandon, Michigan Weather Forecast Discussion

624
FXUS63 KDTX 291924
AFDDTX
Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
324 PM EDT Mon Sep 29 2025
.KEY MESSAGES...
- No significant weather nor precipitation expected through the next
seven days.
- Above normal temperatures retreat to more seasonable readings mid-
week.
&&
.DISCUSSION...
Strong mid-upper blocking ridge of 582-588 dam is forecasted over
the Central Great Lakes region throughout the week and first half of
the upcoming weekend. The net result will be the persistence of a
dry air mass over Southeast Michigan with precipitable water values
at less than three quarters of an inch. The 72hr NBM probability for
greater than 0.01 inch of rain through 12Z Saturday October 4 is
approximated at 0%.
The one notable weather feature is a backdoor cold front that is
forecasted to push into Southeast Michigan from the north and east
Tuesday evening/night. Forecast soundings support a dry feature with
a strongly anticyclonic influence. Daytime temperatures both
Wednesday and Thursday will be the exception with highs at or
slightly above normal (upper 60s to lower 70s). Daytime temperatures
will then rebound Friday and next weekend to some 8 to 10 degrees
above normal. No tangible potential exists for Frost during the next
7 days based on NBM probabilities.
&&
.MARINE...
A diffuse area of high pressure has settled over the Great Lakes
today, while a second high begins to build into Ontario ensuring an
extended stretch of dry weather. Between these two systems, a cold
front drops into northern Lake Huron tonight and establishes NE flow
by Tuesday afternoon. This brings wind gusts to 25 knots and waves
to 5 feet, prompting Small Craft Advisories for the Lake Huron
nearshore.
&&
.PREV DISCUSSION...
Issued at 121 PM EDT Mon Sep 29 2025
AVIATION...
Prevailing VFR as high pressure dominates the region with dry and
stable conditions and clear skies. Wind will remain very light and
variable through the rest of the day as the center of the high
remains parked overhead. Stronger high pressure over northern
Ontario will then build south late tonight into Tuesday, sending a
dry cold front through Tuesday morning and causing wind to become
more organized out of the northeast. Very low boundary layer
moisture precludes a fog mention Tuesday morning, but will monitor
MBS where the front may advect in enough moisture off Saginaw Bay to
bring some brief visibility reduction or low cloud.
For DTW/D21 Convection...Convection will not occur through the TAF
period.
DTW THRESHOLD PROBABILITIES...
* None.
&&
.DTX WATCHES/WARNINGS/ADVISORIES...
MI...None.
Lake Huron...Small Craft Advisory from noon Tuesday to 10 AM EDT Wednesday for
     LHZ421-441.
Small Craft Advisory from 2 PM Tuesday to 4 AM EDT Wednesday for
     LHZ422-442-443.
Lake St Clair...None.
Michigan waters of Lake Erie...None.
&&
$$
DISCUSSION...CB
MARINE.......MV
AVIATION.....TF
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at www.weather.gov/detroit.

NWS DTX Office Area Forecast Discussion