An arctic cold front will continue to plunge southward through the Plains, Mississippi Valley and the Northwest quadrant of the U.S. through tonight. Well below normal temperatures are expected along with dangerous wind chills. A wintry mix will develop over the Ohio and Tennessee Valleys. Meanwhile, heavy rain, flooding and thunderstorms are forecast over much of the Gulf Coast and Hawaii. 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: