Posted June 1, 2018 8:26 p.m. EDT
Showers and thunderstorms are expected from southern New England to Florida on Saturday. A concentrated area of drenching downpours may develop from near the West Virginia and Virginia border to southern Pennsylvania, central and northern Maryland, Delaware and southern New Jersey as a storm slowly organizes along the coast. This same storm is forecast to help pull in cooler and less humid air from the Midwest to upstate New York and northern New England. The air will be cooler and less humid, compared to recent days around the Great Lakes, where some sunshine is likely.
Showers and thunderstorms are projected to advance east over the upper and middle Mississippi Valley. As the storms over the northern tier weaken, more storms may erupt and become severe in Missouri, Illinois and northern Arkansas.
Most areas from Texas and the High Plains to the Pacific Coast can expect dry weather and sunshine. A large area of high pressure is projected to build at most levels of the atmosphere over the Rockies and intermountain West. Much of the interior West will be hot, as will Texas. This high pressure area will settle over the South-Central States next week as a heat wave.
FOCUS: A Warm May 2018 in U.S.
May 2018 was unseasonably warm across most of the Lower 48 states. The Midwest was the warmest compared to normal with average temperatures ranging from 6 to 9 degrees above normal. Temperatures were near normal over California and Florida.