MARQUETTE, Mich. (WLUC) - The heat builds in over the next couple of days as an upper-level ridge in the jet stream moves in. Temperatures will trend well into the 80s with some 90s possible on Thursday. Download the First Alert Weather App hereThe pattern becomes unsettled between Thursday and Saturday as an upper-level trough and surface front will pass through. Rainfall amounts will range from half an inch to an inch, with two to an isolated three inches in the Western U.P. You can subscribe to our YouTube page or download TV6+ to stream the latest local news and weather.