Much of the United States is experiencing very cold conditions as cold air plunges south from northern Canada all the way to the Gulf coast, giving freezing temperatures across most of the country.
An area of low pressure in the Great Lakes region brought snow and bitter winds. Twenty centimetres (8in) of snow was reported in the twin city area of Minneapolis-Saint Paul in Minnesota on Wednesday. The surge of cold air also affected areas farther west, with a sharp cold front bringing a dramatic 22C (40F) drop in just 30 minutes in Cheyenne, Wyoming.
The combination of cold air and strong northerly winds resulted in wind-chill warnings being issued by the National Weather Service, covering an area stretching from the Canadian border to the border with Mexico in southern Texas. Wind-chill temperatures lower than -40C are expected, the temperature at which the celsius and fahrenheit scales intersect.
Over the weekend, travellers and tourists in Iceland found themselves stuck in Keflavik airport as flights were severely delayed or cancelled due to heavy snowfall on Saturday. A few days earlier, a low pressure system developed off the east coast of Greenland and propagated eastwards towards Iceland. The Icelandic Met Office recorded a snow depth of 14cm at 9am on Saturday. Despite sunny conditions, this snow cover had only diminished to 10cm by Thursday due to temperatures remaining comfortably below zero.
Cool eh? Did someone open a window?