Arctic air hits much of the US, bringing snow to some areas and very chilly temperatures to Florida

Some of this autumn’s coldest weather yet is bearing down on the United States, enveloping the eastern two-thirds of the country with Arctic air on Monday and affecting millions of people.

National Weather Service forecasters said the weather could bring record low temperatures in the U.S. Southeast, including all of Florida, where temperatures in parts of the state were near 80 degrees (27 C) just a day ago.

The cold air brought gusty wind and red flag warnings in the Great Plains on Monday, and forecasters said the Great Lakes and Appalachian Mountain regions could see 4 inches (10 centimeters) to 8 inches (20 centimeters) of snow.

Around Lake Erie, forecasters warned of possible lake-effect snow , where copious amounts can fall in relatively narrow bands, drastically increasing s