Portage, Michigan 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

848
FXUS63 KGRR 120009
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
809 PM EDT Fri Apr 11 2025

.KEY MESSAGES...

- Sunny again Saturday

- Few showers possible Saturday night through Monday, then colder

- Next decent chance of rain toward the end of next week

&&

.DISCUSSION...
Issued at 252 PM EDT Fri Apr 11 2025

- Sunny again Saturday

Surface high pressure ridge stretching from the Great Lakes Region
to Texas gives us another day with sunny skies on Saturday before
sliding off to the east on Saturday night. Temperatures moderate
a bit and winds should be lighter, with highs in the upper 50s
expected after another cold night tonight with lows in the 20s.

- Few showers possible Saturday night through Monday, then colder

Warm advection pattern on the back side of the departing high
brings increasing clouds on Saturday night with a low chance of
showers arriving late and into Sunday. Lingering dry air in the
low levels with dew points in the 30s will be a limiting factor
so at this time will have only low chc pops and lighter QPF. It`s
possible that could change later Sunday into Sunday night when the
H8 thermal ridge and higher PWATs arrive ahead of advancing cold
front but still only chance pops warranted then. SPC Day3
convective outlook does show wrn and nrn portions of the area in
the general thunder outlook and if precip can become convective in
nature then the dry low level air mass could be overcome.

The threat of showers and perhaps a few storms will linger into
Monday until the cold frontal passage ushers in colder/drier air
later in the day. A secondary cold frontal passage Monday night
brings down the core of the coldest air and highs Tuesday will be
only in the 40s with gusty northwest winds up to 40 mph while the
upper trough is overhead.

- Next decent chance of rain toward the end of next week

After a brief period of shortwave ridging occurs midweek behind the
departing upper trough, another upper trough drops in from the
northwest for the end of next week. This brings back the chance of
rain showers for Thur-Fri which is followed by another installment
of chilly air for the start of next weekend.

&&

.AVIATION /00Z TAFS THROUGH 00Z SUNDAY/...
Issued at 804 PM EDT Fri Apr 11 2025

Winds stay light and variable at inland TAF sites tonight. A weak
meso-low developing overland will lead to a southwesterly lake
breeze at MKG during the late morning hours Saturday. VFR will
dominate the pattern overall.

&&

.MARINE...
Issued at 252 PM EDT Fri Apr 11 2025

The next chance of hazardous winds and waves on Lk MI is on
Sunday, mainly north of Whitehall, due to increased southerly flow
ahead of an advancing cold front. The cold frontal passage Monday
shifts the wind westerly and hazardous conditions persist and
expand southward. A secondary cold front Monday night ushers in
stronger winds out of the northwest and gales cannot be ruled out
later Monday night into Tuesday.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.

&&

$$

DISCUSSION...Meade
AVIATION...Ceru
MARINE...Meade