Emmett Township, Michigan Weather Forecast Discussion

372
FXUS63 KDTX 290737
AFDDTX
Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
337 AM EDT Mon Sep 29 2025
.KEY MESSAGES...
- Dry weather expected through the next seven days.
- Above normal temperatures drop to more seasonable readings mid-
  week.
&&
.DISCUSSION...
A longwave mid-upper ridge will translate over the Midwest and Great
Lakes over the course of this week bringing stable conditions and no
precipitation to speak of through the work week. For today, the
surface high pressure slides across the central and eastern Great
Lakes while washing out towards the NE CONUS resulting in light and
variable winds locally. Temperatures at 850 mb to 14-16C bring
daytime high temperatures this afternoon in the upper 70s to low 80s
under sunny skies. Continued lack of clouds through tonight will
allow overnight lows to drop into the upper 40s to mid 50s for most
of SE MI.
Lower level flow becomes better organized out of the north to
northeast on the south end of a strong high pressure emerging out of
central Canada. This draws a slightly cooler airmass into Michigan
and will mainly result in daytime highs on Tuesday dropping to
around 80 degrees for most of southeast Michigan with the exception
of shoreline areas that will be in the low-mid 70s.
Mid to late week will see the upper ridge axis pivot across the
central and eastern Great Lakes while the aforementioned surface
high drifts into eastern Canada and the northeast CONUS. The
lower level flow out of the east to northeast will lead to advection
of slightly cooler thermal profiles. This will bring daily highs to
start the month of October down towards more normal values around 70
degrees for inland areas for Wednesday and Thursday. The lakeshore
areas of the Thumb can expect temperatures in the 60s. Another
noticeable difference mid to late week will be a boost in high
clouds.
Warm advection will ensue Friday into the weekend with the passing
of the ridge axis sending 850 mb temperatures back into the mid
teens C. Daytime highs respond accordingly and return to the low-
mid 80s. The longwave ridge begins to flatten during this upcoming
weekend while a Pacific wave crosses the Rockies and into the
central CONUS. A surface high pressure and ridge entrenched over
Appalachia and the mid Atlantic should help direct any
precipitation/deeper moisture associated with this low to the north.
Thus, dry weather would prevail during the weekend as well.
&&
.MARINE...
High pressure drifts into the eastern Great Lakes today while a
second high builds into Ontario. Light winds remain variable through
tonight before organizing out of the northeast by Tuesday morning as
the Ontario high expands. The onshore flow and tighter gradient
elevate wind gusts toward 25 knots and waves toward 5 feet, which
may require Small Craft Advisories for Tuesday.
&&
.PREV DISCUSSION...
Issued at 1141 PM EDT Sun Sep 28 2025
AVIATION...
High pressure and deep layer subsidence will reside across the
region through the TAF period, sustaining light winds and clear
skies. Sfc dewpoints indicate a little elevated boundary layer
moisture at DTW and YIP due to an earlier inland push of the Lake
Erie marine layer. This will open the door to a potential for brief
visibility restrictions due to fog toward daybreak at these sites.
Farther north, current temp/dewpoint spreads support continued
refrain from a early morning fog mention.
For DTW/D21 Convection...Convection will not occur through the 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.
&&
$$
DISCUSSION...AA
MARINE.......MV
AVIATION.....SC
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at www.weather.gov/detroit.

NWS DTX Office Area Forecast Discussion