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This weekend, high pressure shoves tempests into the Deep South, and emerging lows launch thunderstorms across the Great Plains.
Saturday
A stationary front draped across the Deep South along with deep gulf moisture will both coincide with unstable air. Under these conditions heavy rainstorms are expected this Saturday, particularly along the Gulf Coast and surrounding the Mississippi Basin into southern Illinois.
A low-pressure system in the northern Plains and the Rockies, upstream of the plume and with upper-level energy, is predisposed for strong to severe storms on Saturday evening despite morning showers. Hail and severe wind damage will be the primary threats from South Dakota to Minnesota, and the wind threat stretches as far west as far northeastern Nevada.
A dry front along the western edge of this moisture plume, along with upper-level energy, will pop thunderstorms from the southern Front Range into the northern Plains and integrate with the nearvy storms later into Saturday. Monsoonal moisture and low pressure will be the culprit to adjacent storms amidst the Intermountain West, with remnant showers from Friday's storms lingering into Saturday morning in the Southwest.
Elsewhere, high pressure under cooler air digs into the Northeast, gatekeeping storms from entry even into the Mid-Atlantic, and much of the West keeps dry grounds.
Scorching temperatures lessen their extent among the northern Plains states, yet highs in the mid-100s will stick to the forecast. Of course, 110s are in the Desert Southwest as monsoon storms back off, while 90s push solely in the Great Plains, isolated western valleys, and spots among the South. Mid-80s to lower 90s are the talk of most other western valleys, alongside the coastal South, northwestern Texas, the Ohio Valley, and the Atlantic Coast.
A swath of 70s underneath stationary front storms will extend from the Texan coast into Appalachian ridges. Seventies also rock the Interior Northeast, the Great Lakes, the Ozarks, the mid-elevation Rockies, the Pacific coastline, and the Pacific Northwest across Saturday. Some Rocky Mountain peaks sputter just into the 50s, with some keeping to some chilly 40s.
Sunday
A deep low-pressure stretches into the High Plains on Sunday afternoon, popping storms to douse the heated northern Plains. Some storms could be severe, with severe wind gusts at the forefront of current concerns.
Unsettled skies across the South and into the Lower Midwest will persist into Sunday, with flood risks returning this time into southern Appalachia. High pressure will continue to dissuade storms from the Northeast as it slowly saunters northeastward.
Although minimal, some monsoon thunderstorms could make a return to the Desert Southwest. However, dry summery skies are the theme of the West on Sunday.
The heat wave searing the West nearly fades away as the nation's hotspot shifts into the central Plains, with widespread 90s to mid-100s forecast, like the southwestern lowlands as they see a rapid cooling. Eighties into the lower 90s again prevail over the nation on Sunday, including most of the Southeast, the Mid-Atlantic, the Northeast, the Upper Mississippi Valley, central Texas, and western lowlands.
Stormy conditions in the Upper Midwest, western Great Lakes, and the same swath from the Texan coast into Appalachia relegate these regions to highs in the 70s, like the Pacific Northwest, the Pacific Coast, and mid-elevations in the Rockies. Rocky and Cascade ridgelines should mostly heat into the 50s.