A Pacific cold front will move across the West Coast on Friday, while an arctic air mass impacts the Northeast.
A cold frontal boundary will move slowly eastward over the Pacific Northwest and British Columbia. This frontal system will produce moderate rain across northern California, Oregon and Washington. Temperatures will be fairly warm throughout Friday, which will keep snow levels confined to the highest elevations of the Cascades. By Friday evening, snow levels will lower and allow for mixed precipitation to develop across the Olympic Mountains and the Cascades. Rain and high elevation snow will also spread eastward over the Great Basin and the upper Intermountain West. High pressure over the eastern Pacific will keep conditions warm and dry across the Southwest. Temperatures will spike 10 to 20 degrees above normal in many western states.
High pressure will also influence relatively warm conditions across the northern Plains. Temperatures will rise 20 to 30 degrees above normal from the upper Intermountain West to the northern Plains.
Further to the east, a northwesterly flow will generate light to moderate snow across parts of the central and southern Appalachians through Friday morning. Arctic air will also impact the Midwest, the Mid-Atlantic and the Northeast. Daytime temperatures will struggle to climb above the freezing mark across a handful of states.
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