textproduct: Grand Rapids

KEY MESSAGES

- Cooler With A Couple Chances for Showers, Frost Likely

DISCUSSION

Issued at 227 PM EDT Tue Apr 28 2026

- Cooler With A Couple Chances for Showers, Frost Likely

This week an upper level trough will sit over the region bringing cooler temperatures along with a couple chances for showers.

A shortwave trough will move through late tonight into Wednesday morning bringing scattered showers. Best chances (40 to 50 percent) will be south of a Holland to Mount Pleasant line. On the backside of the trough showers could linger into the afternoon with some surface based instability for more brief isolated showers. Depths do not look high enough to pose any risk for thunderstorms.

Another shortwave trough brings slight chances (20 percent) for showers Thursday. Highs through the week will be in the 40s to 50s with lows in the 20s to 30s with the coldest temperatures Friday night into Saturday morning.

The colder temperatures will be a concern for sensitive vegetation. At this time cloud cover is expected to be mostly clear each night along with light winds due to the inversion. Looking at 925mb temperatures and ensemble probabilities the probability of lows less that 36 degrees is high starting Wednesday night and going into the weekend. Ensembles are in agreement as well for probabilities of less than 32 increasing into the weekend. Lakeshore areas may be several degrees warming than inland. Frost Advisory and Freeze Warning headlines will likely be needed.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 137 AM EDT Wed Apr 29 2026

All sites are starting out this forecast period VFR, but this will not last for long. Mid clouds are over the area, on the fringe of a wave of low pressure to our south. We will see some scattered showers move in this morning. The northern terminals will see more low level moisture, and will have a good chance of seeing IFR ceilings by noon EDT/16z. It may take until later this afternoon for the southern terminals to see IFR. Additional scattered showers will develop this afternoon and bring lower conditions at time into this evening before diminishing. Lower conditions will remain with low level moisture holding in.

MARINE

Issued at 227 PM EDT Tue Apr 28 2026

Winds and waves will drop below Small Craft Advisory conditions this afternoon into this evening. Lighter winds and lower wave heights are expected through the remainder of the week. Winds shift to the north tonight into Wednesday and remain northerly into Saturday.

GRR WATCHES/WARNINGS/ADVISORIES

MI...None. MARINE...None.