Weather Underground Forecast for Friday,February 12,2016
A frigid air mass will impact the upper Midwest on Friday, while a Pacific system affects the Northwest.
An area of low pressure will shift eastward over the Great Lakes. This system will usher cold air across the region, which will interact with the relatively warm waters of the Great Lakes. Lake effect snow will develop downwind of Lake Ontario and Lake Erie, impacting northeast Ohio, northwest Pennsylvania and portions of New York. A frigid air mass will trail this system and dip south southeastward across the northern Plains and the upper Midwest. Temperatures will drop 20 to 30 degrees below normal across the region on Friday. In addition, lake effect snow is forecast to develop over northwest Michigan in the wake of this cold snap.
A separate system will take shape along the southern Mid-Atlantic. This system will usher warm and moist air over a much colder air mass. The interaction between these two air masses will produce a mixture of rain, freezing rain and snow over the Mid-Atlantic.
Meanwhile, a Pacific system will move onshore over northwest Canada. A cold frontal boundary stretching south southwestward will swing across the Pacific Northwest. Light to moderate rain and high elevation snow will develop over northern California, Oregon and Washington. By the afternoon and evening, light precipitation will spread eastward across the northern Rockies and the northern high Plains.
A ridge of high pressure over the eastern Pacific will keep conditions dry across the Southwest. Temperatures will remain 10 to 20 degrees above normal over portions of southern California, Arizona and New Mexico.
A frigid air mass will impact the upper Midwest on Friday, while a Pacific system affects the Northwest.
An area of low pressure will shift eastward over the Great Lakes. This system will usher cold air across the region, which will interact with the relatively warm waters of the Great Lakes. Lake effect snow will develop downwind of Lake Ontario and Lake Erie, impacting northeast Ohio, northwest Pennsylvania and portions of New York. A frigid air mass will trail this system and dip south southeastward across the northern Plains and the upper Midwest. Temperatures will drop 20 to 30 degrees below normal across the region on Friday. In addition, lake effect snow is forecast to develop over northwest Michigan in the wake of this cold snap.
A separate system will take shape along the southern Mid-Atlantic. This system will usher warm and moist air over a much colder air mass. The interaction between these two air masses will produce a mixture of rain, freezing rain and snow over the Mid-Atlantic.
Meanwhile, a Pacific system will move onshore over northwest Canada. A cold frontal boundary stretching south southwestward will swing across the Pacific Northwest. Light to moderate rain and high elevation snow will develop over northern California, Oregon and Washington. By the afternoon and evening, light precipitation will spread eastward across the northern Rockies and the northern high Plains.
A ridge of high pressure over the eastern Pacific will keep conditions dry across the Southwest. Temperatures will remain 10 to 20 degrees above normal over portions of southern California, Arizona and New Mexico.
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