437
FXUS63 KGRR 111047
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
647 AM EDT Mon May 11 2026
.KEY MESSAGES...
- Frost/Freeze conditions again tonight
- Rain chances Tuesday and Late Week
&&
.DISCUSSION...
Issued at 205 AM EDT Mon May 11 2026
- Frost/Freeze conditions again tonight
Expect one more cold night as a Canadian surface high remains in
place tonight with clear skies and light winds. Frost/freeze
conditions could impact much of the forecast area. The sfc high
is moving east and clouds may arrive from the west late in the
night but temperatures could still fall below freezing in the
cold spots where winds stay decoupled.
- Rain chances Tuesday and Late Week
A clipper low moving in the fast northwest flow arrives on Tuesday
with the first widespread rain this month. QPF expected to be
around two tenths of an inch with some isolated half inch amounts
possible with scattered convection Tuesday evening.
Flow goes more zonal late week and deeper moisture streams up from
the Gulf ahead of a shortwave trough that arrives Friday or
Saturday with showers and scattered convection.
&&
.AVIATION /12Z TAFS THROUGH 12Z TUESDAY/...
Issued at 647 AM EDT Mon May 11 2026
VFR conditions will continue through tonight. North winds AOB 10
knots today will diminish to light and variable this evening.
&&
.MARINE...
Issued at 205 AM EDT Mon May 11 2026
Winds and waves will be relatively light under high pressure today
and tonight then south winds will increase to 30 knots on Tuesday
and a SCA will be needed Tuesday into Wednesday,
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Freeze Warning until 8 AM EDT this morning for MIZ037>040-
043>046.
Frost Advisory until 8 AM EDT this morning for MIZ050>052-
056>059-064>067-071>074.
MARINE...None.
&&
$$
DISCUSSION...Ostuno
AVIATION...Ostuno
MARINE...Ostuno
NWS GRR Office Area Forecast Discussion
