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 Onshore flow from the Gulf of Mexico maintains warm and humid conditions across the Gulf states. Meanwhile, a frontal boundary will continue dropping southward through the
eastern valleys and into the Southeast. These features in combination will support additional showers and thunderstorms from Texas through the Carolinas. There is a slight chance that some of these storms will turn severe with strong winds and large hail. Heavy rainfall will allow for another 2 to 4 inches of rain to develop across the region. Thus, flooding will remain a concern for most of these areas.
Meanwhile out West, monsoonal moisture continues moving northward from Mexico. On Wednesday, this moisture will make its way over the Southwest, through the Great Basin and into the Intermountain West. This will allow for scattered showers and thunderstorms to develop. These storms will help to alleviate the concerns with fire danger and drought across the Intermountain West, Pacific Northwest and Great Basin. Farther West, high pressure continues building over the West Coast, which will maintain warm conditions. Expect excessive heat warnings to remain in effect as highs reach above 110 degrees across the deserts of southern California and Arizona.
Temperatures in the Lower 48 states Tuesday ranged from a morning low of 37 degrees at Saranac Lake, N.Y., to a high of 109 degrees at Needles, Calif.
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