Weather Underground Forecast for Monday, November 17,2014
A cold front will extend from the Great Lakes to the Gulf Coast on Monday, while a calm weather pattern will persist over the western half of the country.
A cold frontal boundary will stretch across the eastern Great Lakes, the Ohio Valley, the Tennessee Valley and the eastern Gulf Coast on Monday. As an onshore flow from the Gulf of Mexico collides with this frontal boundary, strong to severe thunderstorms will develop over the southern Mid-Atlantic and the Southeast. Severe thunderstorms will be possible over southeast Alabama, northern Florida and southern Georgia. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. Just to the north, a mixture of rain and snow will affect the northern Mid-Atlantic, while moderate to heavy snow showers will develop over the Ohio Valley, the upper Midwest and the central Appalachians. Further to the north, precipitation will override a cold air mass over the Northeast. This will bring a threat of freezing rain to Upstate New York and northwest New England. Mixed precipitation will also develop over the coast of New England on Monday.
To the west of this system, another surge of arctic air will sink southward over the north central portion of the country. Temperatures are forecast to be 20 to 40 degrees below normal across the Intermountain West, the central and northern Plains and the middle and upper Mississippi Valley.
High pressure will keep conditions mostly clear across the West Coast. The exception to this will be over northwest California and southwest Oregon, where late evening showers will be possible due to an approaching Pacific low pressure system.
A cold front will extend from the Great Lakes to the Gulf Coast on Monday, while a calm weather pattern will persist over the western half of the country.
A cold frontal boundary will stretch across the eastern Great Lakes, the Ohio Valley, the Tennessee Valley and the eastern Gulf Coast on Monday. As an onshore flow from the Gulf of Mexico collides with this frontal boundary, strong to severe thunderstorms will develop over the southern Mid-Atlantic and the Southeast. Severe thunderstorms will be possible over southeast Alabama, northern Florida and southern Georgia. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. Just to the north, a mixture of rain and snow will affect the northern Mid-Atlantic, while moderate to heavy snow showers will develop over the Ohio Valley, the upper Midwest and the central Appalachians. Further to the north, precipitation will override a cold air mass over the Northeast. This will bring a threat of freezing rain to Upstate New York and northwest New England. Mixed precipitation will also develop over the coast of New England on Monday.
To the west of this system, another surge of arctic air will sink southward over the north central portion of the country. Temperatures are forecast to be 20 to 40 degrees below normal across the Intermountain West, the central and northern Plains and the middle and upper Mississippi Valley.
High pressure will keep conditions mostly clear across the West Coast. The exception to this will be over northwest California and southwest Oregon, where late evening showers will be possible due to an approaching Pacific low pressure system.
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