Polar vortex over the US east coast (upper centre) on the 6th January 2014,satellite image. The clouds from top right to bottom left are part of a frontal system that caused rain along the coast. Behind it are the clear skies and bitterly cold air of the polar vortex. A blanket of snow can be seen over the mid-eastern states. Polar vortices are areas of low pressure found over each pole. This vortex was pushed south by a high pressure system stuck over Canada and Greenland. It caused record low temperatures that were colder than those at the North Pole. Florida is seen at centre,with Cuba below it. Image obtained by NOAA's GOES-East satellite | |
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Credit: | Science Photo Library / NASA |
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