An oppressive and dangerous heat wave continues across a large section of the U.S. with hazy, hot and humid conditions. Widespread excessive heat warnings and heat advisories stretch from the central and southern Plains to the Southeast. Severe thunderstorms and heavy rain are expected in multiple spots, in Montana, parts of the Midwest and from the Ohio and Tennessee Valleys into the Carolinas. 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: