Some parts of the U.S. could see triple-digit temperatures over the weekend, while severe storms threaten other areas, according to forecasters.

It will stay quite cool and showery on Saturday, but gradual changes are in the works for Memorial Day Weekend. Each day of the next several turns a bit brighter and warmer.

The forecast for the Memorial Day weekend looks hot and dry for most of the Houston area, but storms are expected to return by Monday.

Thunderstorms could threaten motor sports activities at Charlotte Motor Speedway during Memorial Day, forecasters say. Rain, though, should hold off at Indianapolis.