433
FXUS63 KGRR 171110
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
710 AM EDT Sat May 17 2025

.KEY MESSAGES...

- Much Cooler with scattered showers today and scattered frost
  possible Sunday night

&&

.DISCUSSION...
Issued at 304 AM EDT Sat May 17 2025

Temperatures will be held into the 50s today and Sunday with
clouds and scattered showers as a large upper low moves through.
Canadian high pressure builds in Sunday night and skies should
clear with scattered frost possible Sunday and Monday nights
across the northern zones.

Low pressure and moisture returns for mid-week but the bulk of the
rain could stay south of Lower Michigan. Fair and relatively cool
conditions return late week. No severe weather is expected during
the week.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 710 AM EDT Sat May 17 2025

Ceilings will generally be in the range of 2500 to 3500 ft AGL
today. Surface winds with go northwest and gust over 25 knots
through the afternoon then diminish tonight.

&&

.MARINE...
Issued at 304 AM EDT Sat May 17 2025

No changes to the Small Craft Advisory. Winds and waves will
diminish by Sunday. North winds to 20 knots can be expected into
early next week.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...Small Craft Advisory until 2 AM EDT Sunday for LMZ844>849.

&&

$$

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