Forecast calls for cold and warm.

On January 22, 1943 in Spearfish, SD: The temperature rose 49 degrees in two minutes, from – 4 to 45; later the same morning, it dropped 60 degrees in 27 minutes, from 56° to - 4°. Plate glass windows cracked as a result of the wild fluctuation in temperatures caused by Chinook winds. The greatest 24- hour U.S. temperature difference in one place was set January 23- 24, 1916, in Browning, MT, at 100 degrees when it went from a low of -56° to a high of 44°.*

Snow eating is one way it's been described, old tales too.. It's a seasonal wind, like the Mistral. There is some overlap in the definitions but the Chinook can safely be labeled a Foehn wind. A Foehn wind is "a generic term for warm strong and often very dry downslope wind(s) that descend in the lee of a mountain barrier". That is the one illustrated above. My favorite wind though, is the katabatic. A downhill wind. Cold and dense it blows here on Earth especially in the Antarctic, and there on Mars too. (page 9 of 14.) [more inside]
posted by vapidave on Dec 5, 2009 - 33 comments

Stunning pictures by Michael Yon show what happens when helicopters land in dust storms: The Kopp-Etchells Effect is thought to be the result of static electricity created by friction as materials of dissimilar material strike against each other, in this case titanium/nickel blades moving through the air and dust, but a precise definition is as of now not known. [more inside]
posted by krautland on Nov 21, 2009 - 33 comments

Above Enemy Lines (youtube 1, 2, 3, 4, 5) is a BBC Documentary about a RAF Chinook crew on their tour of duty in Afghanistan. Part 4 and 5 of the film deal with the crew attempting to rescue a wounded 19 year-old soldier from a combat zone.
posted by krautland on Sep 8, 2008 - 7 comments

Who was the most dominant athlete of all time? If athletes include draughts players then Marion Tinsley makes a good candidate, losing but 7 games plus 2 more to a computer over the course of a 45 year career. [more inside]
posted by Chuckly on Dec 19, 2006 - 42 comments