Posted May 14, 2018 10:42 p.m. EDT
Drenching showers and gusty thunderstorms are in store Tuesday from Florida to Georgia, South Carolina and eastern Alabama as a system that originated in the northwestern Caribbean moves slowly north over the Gulf of Mexico. Flooding is expected. Clouds and rain will expand slowly to the north this week. The storm could become a tropical system as late as Wednesday.
Hot and humid air will linger over the south central states, the lower Middle Atlantic and the Southeast. Temperatures will continue to challenge record highs in areas where sunshine prevails for much of the day. Severe thunderstorms and torrential downpours will stretch from central Texas to New York state and southern New England. Some of the storms may produce damaging winds, hail and flash flooding, and total rainfall for the week could exceed 6 inches.
Much of the West can expect dry weather and sunshine. Spotty thunderstorms will occur over the ridges, including in the Sierra Nevada. Low clouds that formed along the California coast Monday night are expected to slowly burn off in the afternoon.
FOCUS: Possible Severe Thunderstorms
Thunderstorms are expected to develop across the Appalachians Tuesday as a cold front approaches from the northwest. The storms may turn severe from the Middle Atlantic to interior southern New England in the afternoon and evening.