00:00A dangerous weekend weather pattern is developing across the U.S.
00:04Forecasters warn of flooding across parts of the Plains, Ohio Valley, and Mid-Atlantic on Saturday.
00:10A stalled frontal boundary could trigger repeated rounds of thunderstorms.
00:14That may lead to flash flooding from the Mid-Mississippi Valley into the Mid-Atlantic.
00:19The Storm Prediction Center also warns of severe storms in the same region.
00:24Large hail and damaging winds are possible, especially near the Mid-Atlantic coast.
00:30Farther north, the northern High Plains face an enhanced risk of severe thunderstorms.
00:35The strongest storms could bring large hail, damaging winds, and a few tornadoes.
00:40Heavy rain may shift into the upper Midwest by Sunday.
00:44Meanwhile, extremely critical fire weather continues across the Great Basin and Four Corners.
00:50Dry air, gusty winds, and dry fuels could spread new fires quickly.
00:55At the same time, heat is building across the south.
00:58By Sunday, dangerous heat is expected to expand into the plains and southeast.
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