Weather Underground Forecast for Friday,November 21,2014
A
strong Pacific system will impact the Northwest on Friday, while stormy
weather will continue across the southern tier of the country.
A strong Pacific system will approach the West Coast on Friday. This system will usher moderate to heavy rain across Oregon and Washington starting in the late morning. The heaviest precipitation will develop along western facing mountain slopes. High elevation snow showers will impact the Cascades, while afternoon and evening snow showers will spread across the northern Rockies. In addition, light scattered showers will push southeastward over parts of southern California, while a light mixture of rain and snow will be possible across the Great Basin.
Just to the east, an onshore flow from the Gulf of Mexico will trigger rain and thunderstorms across the western Gulf Coast, the southern Plains and the lower Mississippi Valley. Severe thunderstorms will be possible over central Texas as warm, muggy air mass collides with a cold, arctic air mass. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. There will also be a slight chance of freezing rain over the central third of the country.
Meanwhile, a trough of low pressure will push bitter cold air over the relatively warm waters of the Great Lakes. Lake effect snow will remain a threat downwind of Lake Erie and Lake Ontario. Snow showers are expected to wind down by Friday afternoon and evening.
A strong Pacific system will approach the West Coast on Friday. This system will usher moderate to heavy rain across Oregon and Washington starting in the late morning. The heaviest precipitation will develop along western facing mountain slopes. High elevation snow showers will impact the Cascades, while afternoon and evening snow showers will spread across the northern Rockies. In addition, light scattered showers will push southeastward over parts of southern California, while a light mixture of rain and snow will be possible across the Great Basin.
Just to the east, an onshore flow from the Gulf of Mexico will trigger rain and thunderstorms across the western Gulf Coast, the southern Plains and the lower Mississippi Valley. Severe thunderstorms will be possible over central Texas as warm, muggy air mass collides with a cold, arctic air mass. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. There will also be a slight chance of freezing rain over the central third of the country.
Meanwhile, a trough of low pressure will push bitter cold air over the relatively warm waters of the Great Lakes. Lake effect snow will remain a threat downwind of Lake Erie and Lake Ontario. Snow showers are expected to wind down by Friday afternoon and evening.
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