972
FXUS63 KGRR 031957
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
357 PM EDT Thu Apr 3 2025

.KEY MESSAGES...

- Wet Weather Returns Friday night

- Cold with Snow early next week

&&

.DISCUSSION...
Issued at 257 PM EDT Thu Apr 3 2025

- Wet Weather Returns Friday night

The atmospheric transport of deep moisture ahead of an amplifying
longwave trough will continue across the eastern CONUS into the
weekend with a sfc low tracking from the Ark-La-Tex region through
northwest Ohio by Saturday morning.

We expect rain to move into southern Lower Michigan by Friday
evening and spread north overnight. Wet snow could mix in across
the northern zones by Saturday morning then the deep moisture
peels off to the east Saturday afternoon. A second wave moving
northeast along the baroclinic zone and could linger the rain
across the southeast forecast area through Saturday night.

- Cold with Snow early next week

As the upper trough deepens, colder air moves into Lower Michigan
Sunday night into Monday and a small, but vigorous clipper tracks
across Lower Michigan, bringing a shot of much below normal
temperatures and a potential for a coating of snow on Monday.

&&

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 125 PM EDT Thu Apr 3 2025

Gusty winds to around 30 knots will gradually diminish this
afternoon. Light and variable winds are likely overnight as winds
start veering out of the north and then eventually east by Friday
morning. Cloud bases this afternoon and tonight should keep
conditions VFR but could slip to MVFR at times. The same holds
true into Tuesday morning for southern TAF sites from AZO to JXN.

&&

.HYDROLOGY...
Issued at 356 PM EDT Thu Apr 3 2025

A widespread 1 to 2 inches of rain yesterday, with some areas closer
to 3 inch rain totals are all getting the rivers moving today. In
general, there`s going to be just barely enough room in the big
rivers to avoid any significant flooding, but some of the smaller
rivers and midsize tributaries have seen - or will soon experience -
some minor flooding. This includes the Portage River near Vicksburg,
Sycamore Creek near Holt, and the Red Cedar River in East Lansing.
It`s possible that the lowest/most vulnerable streets along the
Grand River in Comstock Park could also see some very minor flooding
by this weekend, but it`s a bit too early to say for sure.

Our next chance of rain comes in Friday evening, but thankfully will
be much more of a glancing blow for our watersheds, and the main
impact will be to simply prolong the current high water levels
rather than create any new or worse flooding.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...Small Craft Advisory until 4 PM EDT this afternoon for
     LMZ844>849.

&&

$$

DISCUSSION...Ostuno
AVIATION...Hoving
HYDROLOGY...AMD