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Sahara Desert Snow
Credit: Olivier Morice.
On Feb. 18, 1979, low altitude areas of the Sahara desert recorded their first snowfall in living memory. Snow fell in spots in southern Algeria, where a half-hour snowstorm stopped traffic. Several Saharan mountain ranges, however, receive snow on a more regular basis.
In winter, temperatures drop low enough on the Tahat summit, the highest mountain peak in Algeria, to cause snow about every three years. The Tibesti Mountains, in northern Chad, receive snow on peaks over 8,202 feet (2,500 meters) once every seven years on average. [Image Gallery: World's Snow Cover Seen from Space ]