The North Slope region of far northern Alaska had been abnormally cold for a number of days in late January 2011: for example, Barrow had minimum temperatures of -43ºF / -42ºC and -45ºF / -43ºC on 23 January and 24 January, respectively (the normal low temperature on those days is... Read More

A major surge of arctic air from Canada helped to produce the first surface air temperatures of -40º F (-40º C) or colder over the Lower 48 states during the Winter of 2010/2011 — the coldest official minimum temperature was -46º F (-43º C) at International Falls, Minnesota on the... Read More

The surface air temperature at Watson Lake in the southern Yukon Territory of Canada (station identifier CYQH) fell to -56º F (-49º C) at 16 UTC on 14 January 2011. About 2 hours later, a comparison of AWIPS images of 4-km resolution GOES-11 10.7 µm IR and 1-km resolution Read More

AWIPS images of 4-km resolution GOES-13 10.7 µm IR data (above; click image to play animation) showed an expansive deck of elevated stratus clouds covering much of eastern Texas and far southern Oklahoma on 13 January 2011.The Blended Total Precipitable Water (TPW) product (below) suggested that this elevated stratus cloud feature may... Read More