A wave of generalized cold that will affect almost every US state this week will be followed by a potentially disruptive snowstorm in the south and east over the weekend, according to weather forecasts.
"On Wednesday, temperatures will be almost below the coast-to-coast average," said the National Weather Service, warning of an unusual cold all over the eastern United States.
Between Wednesday morning and Thursday morning, temperatures should fall below freezing in parts of all 50 states, even in the normally mild states of Florida and Hawaii.
In general, temperatures will be 10 to 20 degrees below average for much of the week, the National Weather Service said.
For the weekend, cities like Minneapolis and Chicago will see chilly temperatures close to the lower historical records.
Cold air comes directly from the Canadian Arctic, said the meteorological service.
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Every day the @NWSWPC provides a forecast for expected precipitation amounts over the next 7 days. Surprisingly, the forecast of today's 7AM was the first since October 16 that did not include rain for the Eastern PA. 48 days! Finally a dry week. #PAwx pic.twitter.com/s7bjVB49Yd
– NWS State College (@NWSStateCollege) 3 December 2018
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Forecasts expect the storm to "bring a lot of snow, sleet and freezing rain through parts of the southern part of the country and possibly the east coast this week until next weekend," warned the weather. Channel.
Ryan Maue, USA Today weather forecaster, pointed out that the frozen system "will develop and strengthen from Texas to the southeastern United States over the weekend".
"Cold air from the north will allow freezing of precipitation, including snow," he added.
By Saturday, snow, sleet or freezing rain could affect parts of northeastern Georgia towards the Carolinas and southern Virginia, warned the weather channel.
The first winter storm has arrived and the north-east has been covered in white (photo)