How Clear is St. Joseph on August 21?

Will the sky be clear August 21, 2017, when tens of thousands of people gather at Rosecrans Memorial Airport? To be honest, nobody can say with 100 percent certainty. For that reason, meteorologists will study charts, atmospheric flow, temperatures, wind directions and more in the days leading up to the event.

They also study historical climate data. And that’s what this blog is all about. The charts below show a wide range of hours before and after the time of mid-eclipse in 2017. At the airport, that moment occurs at 1:07:38 p.m. I have listed the past five years, with the time range when totality will occur surrounded by a red box.