Weather Underground Forecast for Thursday,September 29,2016
An area of low pressure will continue to produce active weather across the East Coast on Thursday, while scattered storms develop from the upper Intermountain West to the Southwest.
A low pressure area will rotate slowly over the Midwest and the Tennessee Valley. This system will usher moderate to heavy rain and embedded thunderstorms over a handful of states stretching from the middle Mississippi Valley to the northern Mid-Atlantic. Prolonged heavy rain will bring threats of flash flooding to northeast Ohio, Pennsylvania, northeast West Virginia, Maryland, Virginia and Delaware. Cool air will also settle in across portions of the northern Plains, the central Plains, the Mississippi Valley, the Tennessee Valley, the Midwest and the Northeast. A cold frontal boundary associated with this system will extend southwestward. Showers and thunderstorms will develop along and near this frontal boundary over parts of the southern Mid-Atlantic and the Florida Peninsula.
Meanwhile, a weak cold frontal boundary will extend southwestward from the northern Rockies to northern California. Cool air will trail this system over the Pacific Northwest. Scattered monsoonal thunderstorms will pop up from the upper Intermountain West to the Desert Southwest. Most of these storm will develop during the afternoon and evening.
An area of low pressure will continue to produce active weather across the East Coast on Thursday, while scattered storms develop from the upper Intermountain West to the Southwest.
A low pressure area will rotate slowly over the Midwest and the Tennessee Valley. This system will usher moderate to heavy rain and embedded thunderstorms over a handful of states stretching from the middle Mississippi Valley to the northern Mid-Atlantic. Prolonged heavy rain will bring threats of flash flooding to northeast Ohio, Pennsylvania, northeast West Virginia, Maryland, Virginia and Delaware. Cool air will also settle in across portions of the northern Plains, the central Plains, the Mississippi Valley, the Tennessee Valley, the Midwest and the Northeast. A cold frontal boundary associated with this system will extend southwestward. Showers and thunderstorms will develop along and near this frontal boundary over parts of the southern Mid-Atlantic and the Florida Peninsula.
Meanwhile, a weak cold frontal boundary will extend southwestward from the northern Rockies to northern California. Cool air will trail this system over the Pacific Northwest. Scattered monsoonal thunderstorms will pop up from the upper Intermountain West to the Desert Southwest. Most of these storm will develop during the afternoon and evening.
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