Mc Millan, Michigan Weather Forecast Discussion

634
FXUS63 KMQT 260523
AFDMQT
Area Forecast Discussion
National Weather Service Marquette MI
123 AM EDT Fri Sep 26 2025
.KEY MESSAGES...
- A cold front brings isolated rain showers to the western half this
evening.
- A mostly dry and low impact weather pattern with near to above
average temperatures holds into next week.
&&
.DISCUSSION...
Issued at 349 PM EDT Thu Sep 25 2025
Visible satellite shows mostly sunny skies across Upper Michigan
this afternoon beneath transient upper level ridging as low pressure
slowly departs to the south and east. This has allowed temperatures
to climb into the 70s across much of the area with the exception of
a few 60s near Lake Superior and in the east. Looking upstream, a
cold front extends southwest into the MN Arrowhead from a deep low
over Hudson Bay, and this feature is poised to move across the Lake
Superior and the UP tonight. This will potentially bring a few rain
showers across the west later this evening, but do not expect more
than a few hundredths of precipitation in most locations given
limited moisture and instability to work with. Wind will turn
northerly and pick up a bit behind the front, with winds possibly
gusting to 20-25 mph along the Keweenaw through Friday morning.
Expect overnight lows to be a bit warmer than last night as broken
mid level cloud cover accompanies the frontal passage.
Afternoon highs will temporarily fall back closer to seasonal norms
in the 60s on Friday in the wake of the front. Overall, it should be
a pleasant fall day across the area in dry northwest flow aloft.
Another cold front will move across the area Friday night into
Saturday. Models once again struggle to produce much if any
precipitation with this feature, with another round of breezy
conditions on the Keweenaw likely to be the primary impact.
Still looking warm and dry through the rest of the period as medium
range guidance keeps high pressure locked in over the Great Lakes
from Sunday into the middle of next week. Expect plenty of sunshine
with highs in the 70s each day. Clear skies will also allow
temperatures to fall off at night, with widespread 40s and a few
spots perhaps dipping into the upper 30s this weekend.
&&
.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 123 AM EDT Fri Sep 26 2025
A passing frontal boundary has brought in some midlevel cloud cover
at IWD and CMX, but VFR conditions prevail there. As winds shift
over to the north and then northeast with the passing front, upslope
flow is expected to bring low cloud cover to SAW at the start of the
forecast period, with MVFR/IFR ceilings settling in and finally
lifting around 12-14Z. Skies turn sunny again for Saturday with
northeast winds coming in fairly light.
&&
.MARINE...
Issued at 349 PM EDT Thu Sep 25 2025
Available observations show SW winds around 15 kt over the western
half of the lake ahead of an approaching cold front. Expect gusts to
20-25 kt between the Keweenaw and Isle Royale through this evening,
with waves building to 2-4 ft. Winds will veer N to NE behind the
front and remain gusty into Friday morning, with waves building to 3-
5 ft across the southern half of the lake. Winds will diminish back
below 10 kt over most of the lake by Friday afternoon, with waves
subsiding back to 2 ft or less as high pressure moves back overhead.
Another front will bring another round of stronger westerly breezes
Friday night into Saturday. Winds then turn easterly and likely
remain below 20 kt as high pressure dominates from Sunday through
the middle of next week.
&&
.MQT WATCHES/WARNINGS/ADVISORIES...
Upper Michigan...
None.
Lake Superior...
None.
Lake Michigan...
None.
&&
$$
DISCUSSION...CB
AVIATION...LC
MARINE...CB

NWS MQT Office Area Forecast Discussion