Isaias could bring damaging wind gusts, flash flooding and even tornadoes well inland across the Southeast and mid-Atlantic this weekend. Gusts could top 50 mph in the Southeast, with 30-mph winds possible as far north as the mid-Atlantic and Northeast by Sunday. Rainfall totals of 3 to 5 inches of rain are likely, raising the risk of flash flooding. And some of these storms could be severe. Here’s what you need to know.