A trough of low pressure will move across the central third of the country on Friday, while a cold front shifts over the Northwest.
A deep trough of low pressure will push east northeastward across the southern Rockies and the Plains. Daytime heating will trigger showers and isolated thunderstorms over parts of the Sierra Nevada and the southern Rockies. Moisture from the Gulf of Mexico will move northward across the Plains and the Midwest. The aforementioned trough will interact with this moisture, which will lead to widespread rain and thunderstorms. Severe thunderstorms will be possible in eastern Texas, southern Oklahoma and southwest Arkansas. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain will bring threats of flash flooding to eastern Texas, eastern Oklahoma, northwest Louisiana, Arkansas, southern Missouri, northeast Iowa, southeast Minnesota and western Wisconsin. Thunderstorms are also forecast to expand eastward over the northern Mid-Atlantic and New England. Most of the Southeast will stay clear of precipitation, with the exception to thunderstorms over southern Florida.
Meanwhile, a cold front will stretch southwestward across the upper Intermountain West and the Great Basin. Scattered showers and high elevation snow will affect the Pacific Northwest and the northern Rockies. A cluster of thunderstorms will also form over the northern high Plains on Friday.
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