Low pressure developing along the Mid-Atlantic coast today is expected to track northeast along the New England coast overnight into tomorrow, bringing more rain to southern New York and New England.
Across northern New York and New England, a wintry mix is expected.
Across the Adirondacks and much of northern New England, some minor ice accumulations are possible with a few inches of snow possible across northern Maine.
Behind this system, a series of cold fronts will move across the Midwest into the East, bringing rain and snow showers, in addition to colder temperatures across the region.
A strong upper level disturbance associated with one of these fronts is forecast to dive southeast from the northern Plains on Friday into the Ohio Valley and lower Great Lakes on Saturday.
This will bring significantly colder air down from the Upper Midwest into the Ohio Valley and central Appalachians, with daytime temperatures on Saturday expected to be 10-20 degrees below normal across the region.
In addition to the colder temperatures, this system may produce some significant snow accumulations across the higher elevations of the central Appalachians.
Meanwhile, cold northwesterly winds blowing across the northern Great Lakes will likely encourage lake effect snow showers, with a few inches of accumulating snow possible, especially across the U.P. and northern Lower Michigan.
Farther to the west, dry conditions and gusty winds as a cold front pushes through the region will produce critical fire weather conditions across portions of the north-central Plains on Friday.
Fire Weather Watches and Red Flag Warnings have been issued for portions of South Dakota, Nebraska, and Kansas, where any fires that develop may spread quickly.
A strong and expansive upper level ridge will remain positioned over the western U.S., supporting much above normal temperatures across the western half of the country through this weekend.
Daytime highs for much of the West into the southern Plains are expected to remain 10-20 degrees above normal through the end of the week.
Numerous daily record high temperatures are forecast through Saturday across California, the Great Basin, and the Southwest. ■
Modified arctic air combined with a moisture-laden area of low pressure along the Gulf Coast will continue to allow for a broad area of winter weather impacts from the Lower Mississippi Valley to the Southeast today into early Saturday morning.