788
FXUS63 KGRR 191137
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
737 AM EDT Sat Apr 19 2025

.KEY MESSAGES...

- Fair and cooler then rain returns Sunday

&&

.DISCUSSION...
Issued at 328 AM EDT Sat Apr 19 2025

Amplified longwave pattern across the CONUS continues over the
weekend. The longwave trough that brought the recent bout of
storms is not finished, as the southern end has cut off and makes
a run at Lower Michigan later this weekend.

Showers move southeast this morning then fair and cooler behind
the cold front with temperatures steady or falling today. The fair
weather lasts through Sunday morning then moisture returns as the
cut off low across the Southern Plans moves northeast with rain
expected by Sunday afternoon through Sunday night. Instability is
limited but some elevated thunderstorms are possible at times late
Sunday.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 737 AM EDT Sat Apr 19 2025

Showers and storms have now cleared the area as of 11z this
morning. There is a period of low end MVFR to IFR immediately
following the front that has settled in over most of the terminals
this morning. This low cloud cover has yet to make it to KJXN, but
will likely do so quickly this morning. We are already starting to
see the low cloud cover lift toward KMKG from IFR to low end MVFR.
That will be the gradual trend at all of the sites through this
afternoon. We will then see the low clouds totally clear out this
evening, leaving only high clouds overnight.

&&

.MARINE...
Issued at 328 AM EDT Sat Apr 19 2025

The SCA is cancelled, Winds and waves will diminish today then
increase Sunday night into Monday and a SCA will be needed.

&&

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

&&

$$

DISCUSSION...Ostuno
AVIATION...NJJ
MARINE...Ostuno