As storms moved across the country, people witnessed a green-tinged sky. As storms moved across the country Tuesday, people in Sioux Falls, South Dakota, witnessed a rare sight – a green-tinged sky. Meteorologists confirmed it was a “derecho” - a widespread and long-lived straight line windstorm, from a group of fast-moving severe thunderstorms. To be categorized as a … [Read more...] about Derecho turns skies green