040
FXUS63 KGRR 061905
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
205 PM EST Fri Nov 6 2026
.KEY MESSAGES...
- Upper Low Moves East with Rain showers ending tonight
- Another Upper low and showers late week
&&
.DISCUSSION...
Issued at 205 PM EST Fri Nov 6 2026
- Upper Low Moves East with Rain showers ending tonight
Lake effect rain showers will taper off overnight as the upper low
moves east followed by height rises and general subsidence for
the weekend with fair and cool weather through Sunday. A clipper
will move north of Lower Michigan on Sunday but deep moisture and
precip will remain north of the forecast area. Fair weather
continues through the middle of the week in fast quasi-zonal flow.
- Another Upper low and showers late week
A northern stream shortwave trough tops the western CONUS upper
ridging and digs out a longwave trough across the eastern CONUS by
Thursday then merges with upper low over eastern Canada. The
resulting height falls across the Great Lakes region will result
in cooler temperatures with lake enhanced showers by the end of
next week.
&&
.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1252 PM EST Fri Nov 6 2026
Nearly rid of this slow-moving low pressure system responsible for
clouds and showers, but predominant MVFR (temporary VFR) is
favored for the next 24 hours. Rain showers both inland and
lake-enhanced continue this afternoon underneath the deeper core
of cold air that is present. MVFR ceilings should scatter out by
Saturday afternoon with upper-level ridging and high pressure
nosing in.
&&
.MARINE...
Issued at 205 PM EST Fri Nov 6 2026
No changes to the Gale Warning, which will have to be replaced
with a Small Craft Advisory when it expires at 7 PM. Waterspout
threat remains next few hours then the upper low moves off to the
east and lake effect rain showers taper off and waterspout threat
ends.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...Gale Warning until 7 PM EST this evening for LMZ844-848-849.
Small Craft Advisory until 7 PM EST this evening for LMZ845>847.
&&
$$
DISCUSSION...Ostuno
AVIATION...CAS
MARINE...Ostuno
NWS GRR Office Area Forecast Discussion
