Intensifying thunderstorms across the southern and eastern U.S. threatened to unleash dangerous weather conditions.

A spring filled with heavy-hitting weather is ratcheting up once more, as forecasters are warning residents across parts of Texas of "a potentially significant severe threat" Sunday evening. The nasty weather was already moving across North Texas on Sunday morning.

A severe storm with damaging winds, hail, and tornado risk is expected in North Texas Sunday night from 9 p.m. to 1 a.m.