692
FXUS63 KGRR 091852
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
252 PM EDT Sun Mar 9 2025

.KEY MESSAGES...

- Quiet weather until next weekend

&&

.DISCUSSION...
Issued at 252 PM EDT Sun Mar 9 2025

No significant weather impacts expected this week until a mature
cyclone takes general aim at Michigan Friday night or Saturday.

Longwave pattern shows quasi-zonal flow across the Great Lakes
through Thursday. After a mild Monday, a cold front moves through
Monday night with weak high pressure for Tuesday. Return flow of
milder air for Wednesday and Thursday as heights rise in response
to a western CONUS trough. This trough progresses east with a deep
surface cyclone forming in the Central/Southern Plains.

The low is forecast to deepen below 980 mb in most of the
forecast models as it lifts northeast and tracks near or west of
Lower Michigan next weekend. We will have to watch for trends on
track and intensity of the low the next few days. We have seen a
tendency lately for a weaker, less amplified pattern to verify for
forecasts at this time range.

&&

.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 140 PM EDT Sun Mar 9 2025

Latest IR imagery shows high clouds floating over the top of the
state. Short range models indicate a southwesterly low level jet
will move across the region this evening which will create LLWS
for several hours tonight. Otherwise, VFR expected through the
period.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...Small Craft Advisory until 3 AM EDT Monday for LMZ844>847.
     Small Craft Advisory until 1 AM EDT Monday for LMZ848-849.

&&

$$

DISCUSSION...Ostuno
AVIATION...04