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Weather Underground Forecast for Tuesday, September 01, 2015

A wet weather pattern is expected over the Northwest on Tuesday, while thunderstorm activity persists across the Southeast.

An onshore flow from the Pacific Ocean will continue to bring rainy weather to the Pacific Northwest and the northern Rockies. Monsoonal moisture and daytime heating will aid in the development of afternoon thunderstorms across the central and southern Rockies. There will also be chances of thunderstorms over the central Plains on Tuesday. High pressure will keep conditions warm and dry over the Southwest and the western Great Basin. Temperatures will spike into the triple digits across the Desert Southwest.

Meanwhile, a wave of low pressure will slide eastward over the north central portion of the country. This system will generate showers and thunderstorms across the northern Plains and the upper Mississippi Valley. Isolated thunderstorms will also be possible over the Ohio Valley and the interior Mid-Atlantic during the second half of Wednesday. High pressure will keep a dry air mass parked over the northern Mid-Atlantic and New England.

An easterly wave of low pressure will usher rain and thunderstorms over the southern Mid-Atlantic and the Southeast. Additionally, showers and thunderstorms will fire up along the western Gulf Coast and the lower Mississippi Valley due to a pocket of energy over the western Gulf of Mexico.

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