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

Weekend will be mostly cloudy and cool in Boston before the temperature goes up towards the end of the weekend.

Central Pennsylvania residents can expect a chilly and wet Memorial Day weekend, with temperatures 10 to 20 degrees below normal and intermittent rain showers. A persistent cool weather pattern will dominate the region through the holiday weekend, bringing unseasonably low temperatures in the 50s and scattered rain showers.