Ellsworth AFB, SD  57706      8/29/2014
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Storm Central
Labor Day Weekend Preview
2:30 PM EDT, August 29, 2014
By WeatherBug Sr. Meteorologist, James West
The Labor Day weekend will see big changes for several parts of the U.S., including a small hint of autumn arriving across a sliver of the north-central U.S.
The weekend will start out with afternoon thunderstorms on the docket across the northern Rockies and the adjacent northern Plains as well as from the Gulf Coast up the Mississippi Valley into the Great Lakes and Midwest. Although most of these storms will be scattered, the storms hitting the Gulf Coast and riding up the lower Mississippi Valley will be more widespread and produce downpours capable of localized flash flooding.
The rest of the U.S. will bask in August sunshine. High temperatures Saturday afternoon will range from the triple digits in the Southwest to 70s in the Northwest, Upper Midwest and the Northeast. In between these two temperature extremes, highs will be in the 90s across the Southwest, southern Rockies, Southern Plains, South, Southeast and Ohio Valley. Everywhere else will be in the 80s.
The weather will be in transition on the final day of August. Thunderstorms will once again be possible across the northern Rockies and the northern and central Plains and in a corridor running from the central Gulf Coast northeastward into New England. Even with the thunderstorm potential, temperatures will easily rise in the 80s and low 90s from the central Plains eastward, with building humidity ahead of the storms making it feel muggy throughout the Mississippi Valley, South, Southeast, Mid-Atlantic and Northeast.
The U.S. western half will have a mostly sunny Sunday, with cool air diving out of Canada producing almost autumn-like upper 60s and 70s across the northern Rockies and the Northwest. California, the Southwest, southern Rockies and southern Plains will remain locked in summer, with highs in the 80s and 90s. Triple digit highs will be found in the Desert Southwest.
Labor Day
September will begin on a pleasant note across most of the U.S. The exception will be across the East Coast and the Great Lakes, where afternoon thunderstorms will force outdoor activities indoors. September sunshine will dominate the rest of the nation.
Just like Sunday, a touch of autumn will be felt across the Northwest, northern Rockies and the northern Plains. Highs here will be in the 70s and low 80s, with low humidity. Highs in the 80s and 90s will be found across the rest of the U.S., with upper 90s and even a few triple-digit highs in the Southwest, interior southern California and southern and central Texas.
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