Storm Team4 July 10, 2022 10:27 am Sunday Science: Understanding Air Pollution in the DC Area Storm Team4 Meteorologist Ryan Miller explains what causes air pollution and why it happens more in the summer. Local 2:59 Daytime weather, Sept. 22 1:56 Morning weather, Sept. 21 1:33 Evening weather, Sept. 20 2:15 Storm Team4 morning forecast: Sept. 20 3:03 Evening weather, Sept. 19