Here's more on polar vortex and La Niña weather patterns

AI-assisted summary

An Arctic blast could bring freezing temperatures and heavy snow to Kentucky around Thanksgiving weekend.

A "sudden stratospheric warming" event may disrupt the polar vortex, potentially causing bitter cold and snow across the U.S.

The La Niña weather pattern will help steer the cold air, while the polar vortex will influence how cold it gets.

Other factors, such as a marine heat wave in the Pacific, could also influence this winter's weather forecast.

Kentucky could possibly see freezing temperatures and heavy snow during Thanksgiving weekend into early December with an Arctic blast on the move toward the U.S.

Climatologist Judah Cohen, a research scientist at MIT , said in an email to USA TODAY that a "sudden stratospheric warming" event could occur, whi