A heat advisory is in effect for parts of the northeastern United States and Wisconsin as temperatures are expected to rise through the week, peaking on Friday. Forecasts indicate a mix of sun and clouds with periods of low clouds, patchy fog, and scattered thunderstorms, some of which may be strong to severe. Inland highs are projected to reach the upper 80s to low 90s, with heat indices rising to 95-100 degrees by Wednesday and potentially reaching triple digits on Friday. Humidity levels are increasing, contributing to a muggy atmosphere, particularly from Thursday through Saturday morning, before a drop in humidity is anticipated on Saturday afternoon. Coastal areas are expected to experience slightly cooler temperatures in the 70s to low 80s. The weather pattern includes breezy conditions with southerly winds, and there is some uncertainty regarding the exact temperature due to lingering morning storms and cloud cover, which are expected to clear later in the day.