358
FXUS63 KAPX 041734
AFDAPX

Area Forecast Discussion
National Weather Service Gaylord MI
134 PM EDT Sun Oct 4 2026

.KEY MESSAGES...

- Chilly tonight through Monday night...with frost/freeze
  concerns Monday night

- Seasonably mild with little evidence of significant weather the
remainder of next week

&&

.DISCUSSION...
Issued at 132 PM EDT Sun Oct 4 2026

Pattern Synopsis/Forecast:

Shortwave trough and attendant rather sharp cold font now off to our
east, although broader overhead upper level troughing remains.
Rather widespread showers from earlier have exited east with the
front, though cold air within trough axis is kicking off some lake
clouds. Cold air advection on the heels of some gusty northwest
winds partially offsetting the normal diurnal temperature cycle,
with current readings in the 50s and 60s.

Troughing will continue to deepen across the eastern Great Lakes
through tonight, punting further off to our east on Monday. Surface
high pressure will continue east as well, cutting across our area
Monday into Monday evening. Progressive northern stream flow looks
to continue thereafter through the remainder of next week, likely
locking any real chilly air to our north and keeping any tropical
moisture connection well to our south.

Primary Forecast Concerns:

Temperature trends, with special emphasis on just how cold we get
Monday night. Secondary focus on low end precipitation chances
through the period.

Details:

Northwest winds and cold air advection look to continue overnight,
with the latter enhanced by passing weak shortwave within that
broader overhead troughing. Low level thermal profiles become more
than cold enough to entice a weak lake response, especially off Lake
Superior where boundary layer moisture profiles look a bit more
robust. This should drive at least the threat for a few light
showers into the famed lake effect areas of eastern upper Michigan.
Likely to see at least a few clouds rotate off northern Lake
Michigan...with this and maintenance of those northwest winds making
a tricky temperature forecast. Simple breadth of cold air advection
supports lows down into the 30s across interior areas. Borderline
frost-producing temperatures at best, and honestly wonder if frost
will form at all given those winds. Given uncertainties and such
marginal conditions feel best course of action is to forgo any
specific frost headline.

Probably still a few lake clouds on Monday, especially north of the
bridge, with cold thermal profiles likely supporting a shallow cu
field elsewhere. A bit chilly Monday, with highs in the 50s for
most...and a few lower 60s on the south side of the sunrise side
where downslope warming will be maximized. Another tricky
temperature forecast for Monday night as high pressure builds into
and eventually moves east of the Northwoods. Pattern recognitions
supports a rather rapid nocturnal temperature response with clearing
skies and light/calm winds during the evening and early overnight.
Weak southerly return flow and likely some increasing higher level
clouds will likely slow or even reverse the temperature free-fall
during the early morning hours. Statistical guidance remains quite
chilly, with lows well down into the 30s away from the big waters,
and some upper 20s in our traditional ice-box locations. Will likely
eventually need a round of frost/freeze headlines for Monday night
across at least sections of northern lower Michigan (frost/freeze
headline season for eastern upper has been expired).

Not much to talk about for the remainder of the week into next
weekend. Again, strong support that any real chilly air will retreat
quickly north, and any moisture rich airmass will remain to our
south. Likely looking at temperatures running near to a bit above
specific normal values through the period. Passing waves may bring
some lower end shower chances at times, but by and large the week
looks like a dry one.

&&

.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 1258 PM EDT Sun Oct 4 2026

Mix of MVFR and VFR early this afternoon amid persistently gusty
NW flow (at times +20kts)... APN more westerly at forecast
period onset but should flip NW by 20z. While not anticipated to
prevail, a few sprinkles will be possible at all sites except
APN this afternoon... no visibility issues anticipated. Clouds
will be on the decrease through the evening, resulting in more
of a VFR prevailing period through Monday. NW winds taper some
tonight before increasing again (up to 20kts) by mid morning on
Monday.

&&

.APX WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...Small Craft Advisory until 3 PM EDT Monday for LHZ345>348.
     Small Craft Advisory until 3 PM EDT this afternoon for LHZ349.
     Small Craft Advisory until 11 AM EDT Monday for LMZ323-341-342-
     344-345.
     Small Craft Advisory until 8 AM EDT Monday for LMZ346.
     Small Craft Advisory until 11 AM EDT Monday for LSZ321-322.

&&

$$

DISCUSSION...MSB
AVIATION...HAD

NWS APX Office Area Forecast Discussion