Dangerous heat will impact portions the Northwest, Northeast, and the Lower Mississippi River Valley Monday. Organized areas of monsoonal showers and thunderstorms may result in flash flooding and debris flows from the Four Corners region into the Southwest. A stalled cold front will lead to unsettled conditions from the Mississippi and Ohio River Valleys to the Northeast through Wednesday. Read More >
Coverage Map Notes
The coverage statistics and maps are calculated using a computer model and station data assuming ideal conditions. Coverage may be 5 to 10 percent below the computer predicted coverage for the following reasons: