The map above shows the 8-14 day temperature outlook from the Climate Prediction Center for Sept. 26 – Oct. 2. Much of the Central U.S. into the Great Lakes has turned blue. That mean a likelihood of cooler than average temperatures. So far, this month has been 5.1 deg. warmer than average. A sharp cold front moves thru Friday AM and temps. will start to fall Friday PM. Saturday will see highs in the mid-upper 60s. The real cool air arrives in about a week. Average high temperatures at the start of October are in the mid 60s, so if we’re cooler than that…it’ll be a significant change.
The map above is the forecast temperature difference from average for Thurs. 9/27. Temperatures in MI are about 5 deg. cooler than average. It’s warm along the coasts. What’s interesting is the large amount of Canada that is considerably colder than average (map from weathermodels.com). It’s going to be quite a change.
This is North American snow and ice cover. You can see there is snow on the ground in far northern Canada (Nunavut). Winter comes early there. Barrow AK had a high temp. of 33F on Tue.