John Metcalfe, writing for CityLab:
Michael Warwick; Shutterstock
“Meteorologists in St. Louis noticed a cloud acting peculiarly: It was beating a path toward Mexico while changing into a variety of odd shapes. Was it a radar glitch? The debris signature of a south-moving tornado?
The answer was more heartening—and bizarre. After analyzing the reflections, the National Weather Service concluded they showed an immense swarm of Monarch butterflies migrating to their winter home in the Mexican mountains.”
NWS St. Louis
May the Force be with you.
