Transport of Polar Air Masses
by midlatitude cyclones

Arctic air masses move about as a shallow area of high pressure, commonly known as an "Arctic High". Northerly winds associated with a cyclone and trailing anticyclone, (the center of the arctic air mass), transport the colder air southward. Since the terrain is generally flat and free of any significant topographical features, arctic air masses entering the United States and can easily slide all the way to Texas and Florida.

Terms for using data resources. CD-ROM available.
Credits and Acknowledgments for WW2010.
Department of Atmospheric Sciences (DAS) at
the University of Illinois at Urbana-Champaign.