Polar vortex, cold air

Polar vortex to send bitter cold to the U.S. including DC area
The polar vortex is a ring of cold air that typically circles the Arctic. A strong jet stream essentially acts like a fence, keeping it locked there. If there's any weakening in the jet stream (the fence), the frigid air can become unstable and spill out. This sends the normally trapped cold air much farther south.
Polar Vortex Map Shows How Cold Temperatures Will Get in Your State
A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.
A polar vortex will bring brutally cold temperatures and an arctic blast to much of the U.S. next week
Snow and winds are likely to trigger flight cancellations and cause headaches for people traveling to DC for Inauguration Day.
The polar vortex will soon hit the U.S. See how cold it’ll get where you live
The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously frigid conditions.
Polar vortex set to envelop much of US in freezing temperatures
A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.
Polar vortex to dump half a foot of snow on NYC, followed by deadly Arctic cold
A brutal polar vortex is set to bury the Big Apple in snow Sunday and then deliver deadly single-digit temperatures that will feel like 15 degrees below zero.
Polar vortex-related Arctic blast brings "dangerous" cold, snow to U.S.
Erin Davis/Axios Visuals An invasion of frigid air from the Arctic is sweeping south from the Plains and Ohio Valley Sunday, moving towards the Southeast and East. Threat level: The colder-than-average temperatures threatens public health for those exposed to the wind and cold,
Prolonged polar vortex has much of US preparing for life-threatening cold, pipe-bursting temperatures
A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen in years.
Polar vortex air on the way; -20° wind chills possible for some
FOX59 Meteorologist Ethan Rosuck provided an update on the dangerous cold Indianapolis could see at the start of the work week.
Polar vortex brings dangerous cold
Dangerous temperatures are sweeping the country, with 100 million people from the Plains to the Northeast feeling the chill. Even those in the South will see some effects. Several cities have already declared weather emergencies,
Polar vortex maps show where arctic blast is set to freeze the U.S. as far as the Deep South
A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.
Washington Times13d
Polar vortex keeps much of the U.S. in its icy grip
A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... wardrobes for hats and gloves. Washington, D.C., received heavy snow as ...
Forbes4d
The Polar Vortex Is Coming: Expect Temperatures Below Zero And Snow In These Areas
Most of the country will likely be hit by an arctic blast this weekend into early next week as the polar vortex ushers ... reach the single digits in Washington, D.C., Philadelphia and Boston.
Winter weather brings winter storm warnings, polar vortex from Texas to Maine
A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...