FXUS63 KGRR 091857

AFDGRR



Area Forecast Discussion

National Weather Service Grand Rapids MI

257 PM EDT Fri May 9 2025



.KEY MESSAGES...



- Mostly Dry through Monday, then chances of Rain Next Week



&&



.DISCUSSION...

Issued at 257 PM EDT Fri May 9 2025



Very dry atmosphere will slowly moisten late tonight as moisture 

pools in front of advancing cold front. Temperatures are expected

to fall into the 30s across the northern tier with some scattered

frost possible, but light winds should mitigate stronger

radiational cooling. 



The front moves through Saturday morning with just enough moisture

and lift to produce a slight chance of showers, mostly across the

northern half of the forecast area, then more cool and dry air

moves in with another chance for frost formation Saturday night

across the northern zones.



An upper low will move northeast from the Gulf Coast as a strong

western CONUS trough pushes east early next week, with upper

height falls and low level moisture returning for some diurnally

enhanced showers and thunderstorms for Tuesday and Wednesday.



&&



.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...

Issued at 126 PM EDT Fri May 9 2025



Mainly clear skies are expected through the period. A weak cold

front will move across central Lower around 12z bringing a sct-bkn

mid cloud layer that will quickly move through. There may be a

passing shower with this cloud deck but probably not; showers were

left out of the TAFs.



&&



.MARINE...

Issued at 257 PM EDT Fri May 9 2025



Winds and waves will briefly spike ip to near SCA conditions 

Saturday afternoon and evening, then decrease again on Sunday into

early next week.



&&



.GRR WATCHES/WARNINGS/ADVISORIES...

MI...None.

MARINE...None.



&&



$$



DISCUSSION...Ostuno

AVIATION...04

MARINE...Ostuno