A complex low-pressure trough will bring precipitation to Upper Michigan tonight.
Rain and snow was moving out of northern Wisconsin into western Upper Michigan. The precipitation will continue spreading eastward during the evening. The low is in two centers, one to our northwest and the other to our south. Yesterday, it appeared the southern low would come farther north and dump heavy precipitation including heavy snow over parts of Upper Michigan. That will not be the case as the southern low will stay well to our south. Nonetheless, moderate amounts of rain and snow are likely tonight.
The temperatures are very marginal in that snow was falling in places like Rhinelander with a temperature just above freezing. This will be the case over the western U.P. Snow is most likely to accumulate over higher terrain locations where temperatures will be a bit colder. As for accumulations, a few inches of slushy snow are possible over the highlands of the west and north-central. The highest elevations in the Copper Country may see as much as four or five inches of snow. A Winter Weather Advisory is in effect for this area tonight into early Friday.
The threat of light precipitation will continue, especially over northern and eastern portions on Friday into Friday night. As colder air filters in, much of this area will see some snow, though no substantial accumulation is expected after tonight.
Over the weekend, strong high pressure will build in from the north. This high will anchor itself from north of Hudson Bay into the Great Lakes providing dry but cool weather. It will be especially chilly near Lake Superior with northeasterly winds.