Cooler Today

posted in: Michigan Weather Forecast | 4

We have another great early fall day today.  A few rain showers may pop up, but most places will stay dry. Rain chances are only around 20%.  It will remain cool today, with highs only in the mid-60s to low 70s. Lows tonight will drop to the mid-40s to low 50s. The weather will gradually warm into the weekend, with highs back up in the upper 70s to mid-80s by Saturday. Dangerous waves and currents are expected at the Lakeshore Saturday, especially north of Holland.

We picked up another .01 of an inch last evening from a passing shower which brings us to .16 of an inch for the first eight days of September.  Our last decent rain was back on August 26th, so we are now in one of our extended dry spells which we saw off and on during the summer.

Yesterday’s high temp was 75° the low was 55°.  We currently have 49° at 6:30 am.

Sunrise today is 7:17, sunset is 8:03 pm.

Forecast Discussion

- Cool night tonight

Today will feature cooler than normal High temperatures as the low
level thermal trough passes through.  Then tonight good radiational
cooling and a drying airmass is predicted.  After a cool start to
the evening...the temperature should drop into the 40s for many
locations. Some spots in the Upper Muskegon basin may dip down
into the 30s by daybreak. Patchy fog looks possible as
well...especially valleys and low spots.

- Breezy Late Friday night into Saturday night

Models are showing a stronger low level jet arriving later Friday
night.  This low level jet remains over the area on Saturday and
strengthens again Saturday night. As the mixing height deepens up
Saturday...the surface wind will increase steadily. Assuming we mix
into the 925 mb range...gusts over 25 knots look likely. Gusty
conditions should persist into the evening given the increasing
wind fields.

- A few storms possible over the weekend

The low level jet draws up increasing amounts of moisture.
Elevated instability arrives as well...with the latest High Res
Euro showing -5 deg C Showalter indices 06z Sunday. Given the
stronger wind fields in place then...gusty winds may accompany
these storms. The GFS also shows an axis of elevated instability
moving in then. We will add a chance for storms to the forecast
then. Models do vary on the timing of tracking the surface front
through the region on Sunday. We will keep a risk for a few storms
going during the day for now.


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Sandy (Hudsonville)
Sandy (Hudsonville)

Today was a beautiful Fall Day!! Crisp and cool this morning and it warmed up some thru the day. A great day to be outside in the garden. 🙂

Rocky (Rockford)
Rocky (Rockford)

Bring on winter! I love summers with no heat waves and now lows in the 50’s! Incredible!


Back to the 80’s this weekend and next week? I love long summers!


It is clear and cool here this morning. The overnight low here was 52 the official overnight low at GRR looks to be 55. So far Grand Rapids is right at average for September in the temperature department. At this time it is clear here with a temperature of 54.