Low pressure tracking through the Northeast will spread a mixture of heavy snow, sleet, and freezing rain across portions of northern New York and New England through today.
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A kona low west of Kauai will force a large swath of very moist, tropical air over Hawaii through Saturday where persistent heavy rain could lead to very dangerous flash flooding.
The most notable precipitation forecast across the Nation through this weekend is expected to occur over the Pacific Northwest and Northern Rockies in the form of potentially heavy mountain snow.
Northwesterly flow aloft around an eastern Pacific upper-level ridge will allow for waves of of moisture to enter the region.
Snow is expected to be heaviest across the higher terrain and gradually add up to over a foot by the end of the weekend.
Lower elevations across Idaho and western Montana may also experience lighter snowfall amounts.
Elsewhere, a much colder airmass has entered the eastern third of the Nation today behind a potent cold front.
Lingering snow showers are not out of the question across southern New England this evening as subfreezing air surges southeastward.
Lake effect snow showers are also expected to linger into early Saturday, along with upslope snow throughout the central Appalachians.
Farther south, scattered showers along the cold front are forecast to swing southward across the Florida Peninsula into Saturday.
Easterly flow will continue across the Sunshine State this weekend and allow for isolated shower chances.
Lastly, in terms of precipitation, light snow may traverse the northern Plains and Upper Midwest on Sunday, while shower chances enter Arizona and New Mexico ahead of a churning upper-level low.
Temperatures this weekend are not anticipated to be widely anomalous compared to climatological averages.
Below average temperatures are forecast across the southern tier on Saturday underneath a modest high pressure system.
Above average temperatures then become more widespread on Sunday (outside the Rockies and Intermountain West). ■