Southeastern Lower Peninsula — Regional Forecast Discussions
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854
FXUS63 KDTX 141112
AFDDTX
Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
712 AM EDT Wed Oct 14 2026
.KEY MESSAGES...
- Temperatures closer to normal and drier today, followed by
additional rainfall late Thursday afternoon into early Friday
morning.
- A strong cold front delivers gusty winds and much chillier
conditions Friday, with a few showers in spots.
- Turning drier through the weekend with slightly warmer readings by
Sunday.
&&
.AVIATION...
Cold front has settled just south of Michigan to start this TAF
period with just higher coverage of shower activity along the state
line now pushing east. Expecting a mix of MVFR and low VFR clouds
this morning with a lifting to predominately SCT/BKN low VFR for the
remainder of the day. Light NNW winds veer to the N-NE by this
evening with a high pressure building across the northern Great
Lakes, which will also supply the drier air to help improve the
ceilings this afternoon. It appears northeasterly winds for tonight
will help bring a return to greater coverage of Lake Huron stratus
that brings a return to SCT to BKN MVFR ceilings.
D21/DTW Convection...No thunderstorms today or tonight.
.DTW THRESHOLD PROBABILITIES...
* High for ceilings at or below 5,000 feet this morning. Medium for
this afternoon.
&&
.PREV DISCUSSION...
Issued at 307 AM EDT Wed Oct 14 2026
DISCUSSION...
Remnants of overnight showers/storms vacate the area early this
morning as upper Midwestern high pressure builds in the from north.
Elevated portions of the weak cold front in northern Ohio are slowly
pushed south over the course of the morning which could still allow
a spotty light shower/drizzle through mid-morning along the state
border. Otherwise dry conditions are established across SE MI today
with cool northerly flow bringing temperatures back closer to
averages, albeit still some 5 degrees warmer than mid-October
normals.
Influence of high pressure wanes over the course of Thursday morning
as it tracks towards Quebec. While this occurs, a southern stream
mid-upper trough ejects at out the 4-corners region over the central
Plains phasing with a northern stream trough digging out of
Manitoba. Timing of lead rain has come into better focus with this
cycle of runs with showers expected to expand southwest to northeast
over the course of the late afternoon-evening (~20-00Z) as the
elevated warm frontal slope lifts into SE MI. A few rumbles of
thunder possible by late evening towards the Ohio border area as the
surface warm front lifts north towards M-59 allowing at least a few
hundred J/kg of elevated instability to build over the state line.
Surface low progged to slide directly over the area Thursday night
coinciding the bulk of rain coverage/QPF with rainfall totals
generally falling in the 0.25-0.5" range.
Synoptic rain tapers off Friday morning as the low pushes deeper
into southern Ontario. That said, parent upper trough swings across
the west/central Great Lakes during the day ushering in significant
cold air aloft (500mb temps fall in the -20's C) steepening lapse
rates, which in combination with passing upper divergence, offers
scattered convective shower chances. Increasing mixing depths within
post-frontal cold advection looking capable to partially, if not
fully, tap into 30-35kt flow aloft supporting wind gusts of 30-35mph
with potential to peak in the 35-40mph range. Core of this colder
airmass reaches the area overnight, marked by 850mb temps falling to
around -3C. The edge of Plains surface high pressure attempts to
nose into southern MI Friday night as well promoting clearing skies
and diminishing winds going into early Saturday morning. As such,
setup is favorable for the first freeze for a portion of SE MI as
lows bottom in the lower 30s, especially north of M-59 where sub-
freezing temperatures are most likely. Below normal temperatures are
short-lived however as central CONUS upper ridging expands overhead
Sunday returning temps near to above normal for the first half of
the new week.
MARINE...
Northwest flow takes hold today in the wake of a cold
front which will bring localized stronger winds and gusts across
Lake Huron where fetch is more favorable. Wind gusts ranging between
20 to 25 knots are expected across north and central Lake Huron
through the early evening hours. A high pressure system will then
fill in across the northern Great Lakes starting tonight, which will
diminish wind speeds leading into tomorrow morning. Lighter winds
hold through Thursday as winds veer from east to southwest as high
pressure departs.
Attention will then turn to the passage of a low pressure system and
subsequent strong cold front, slated to move over the Great Lakes
Friday. The initial passage of the low pressure system will likely
bring numerous to widespread rain showers in the morning. Passage of
the low will usher in a strong cold front that will usher in cooler
Canadian air. The strong increase in instability as cooler air
filters in over the warmer lake waters coupled with prolonged
northwest fetch brings high confidence to see gust to gales across
Lake Huron and the Saginaw Bay, and likely south into Lake St. Clair
and Lake Erie. Gale Watches have been issued for Lake Huron this
forecast package with the potential said watches are expanded over
Lakes St Clair and Erie in future updates.
&&
.DTX WATCHES/WARNINGS/ADVISORIES...
MI...None.
Lake Huron...Gale Watch from Friday morning through late Friday night for
LHZ361>363-421-422-441>443-462>464.
Lake St Clair...None.
Michigan waters of Lake Erie...None.
&&
$$
AVIATION.....AA
DISCUSSION...KDK
MARINE.......AM/KDK
You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.