What the Heck Is a Pneumonia Front?
On May 23, 2021, atmospheric fog and clouds accompanied a pneumonia front in Kenosha, Wisconsin. COURTESY VIEW FROM ABOVE-WISCONSIN Lake Michigan, to the left of the state, has a long, north-south shape, which helps make its unique pneumonia fronts possible. JEFF SCHMALTZ/NASA Pneumonia fronts may be accompanied by low shelf clouds, and may travel several miles inland from Lake Michigan. GEMMA TARLACH Chicago, like Milwaukee and other communities on Lake Michigan’s southwestern shore, experiences pneumonia fronts most often in late spring. ALVESGASPAR, CC BY-SA 4.0/WIKIMEDIA