Cold snap to move east, while Northwest will see rain and snow
The National Weather Service forecasts a sharp drop in temperatures in the eastern half of the country beginning Wednesday night, while several storm systems moving in from the Pacific will bring heavy rain and snow to the mountainous regions of the Northwest.
Illustrative image of rainfall across the country
The eastern part of the country will experience a drastic change in weather conditions beginning Wednesday night, as a cold air mass moves across the eastern half of the country, accompanied by a low-pressure system that will cause winds to pick up.
According to the forecast from the National Weather Service's (NWS), the system will move from the northern Great Plains overnight Tuesday and reach the Appalachian region by Thursday morning.
The Midwest and the Ohio and Tennessee Valleys could also experience thunderstorms and strong wind gusts on Wednesday. Wet snow is possible in the Upper Great Lakes region by Thursday morning.
Heavy rain and snow in the Northwest
While the East prepares for this weather change, the Northwest will face several episodes of precipitation due to a succession of storm systems coming from the Pacific.
The NWS forecasts moderate rain and snow in the higher-elevation areas of the Pacific Northwest over the next few days. The Olympic Peninsula will be one of the hardest-hit areas, with several inches of rain through Thursday morning.
In South Texas, the risk of heavy rain will gradually decrease on Tuesday as the associated storm system moves eastward and weakens. However, some precipitation may persist in areas of the western and central Gulf Coast over the next few days.
Meanwhile, low-pressure systems moving across southern Canada will bring scattered showers to parts of the Great Lakes region and the Northeast through Wednesday.
Mild temperatures before the change
Much of the western half of the country will continue to experience dry conditions and milder-than-usual temperatures through Thursday morning, with the exception of the precipitation expected in the Northwest.
On the East Coast, mild air will spread rapidly on Tuesday afternoon. However, some areas of the Mid-Atlantic will experience conditions cold enough to cause frost in the early morning hours.
The National Weather Service has issued frost advisories for parts of eastern North Carolina and southeastern Virginia.
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