First I want to tell you what a derecho is, by the way in Spanish means (straight). It is a very long lived intense wind storm. It can have winds of 58 miles and above. Though fairly rare, the last Super Derecho was on May 30 2012. It started with a warm front and, the jet stream (fast flowing air currents) separating the warm air from the cold which is made instability around the jet stream. Those same conditions are present now. That’s why weather forecasters are saying a derecho could occur, on Thursday or today (Wednesday).
May 30, 2012 introduced many of us to a new weather term. I know it is the first time I’ve ever heard of it. A super derecho is a storm system that has very high straight-line winds. We saw a system like this most recently on June 30, 2012. It had winds of up to 100 mph. The storm knocked out electricity to parts of 6 states in the mid-Atlantic region for up to five days.. But this was not the first Super Derecho in our history. Another occurred May 8, 2009. And others in prior years. But they do not happen very often. For which we should all be thankful