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That wold be part of the Atacama desert then? Still pretty unusual I think.
Sorry it took so long to respond but just came back from vacation to the cooler California coast, plus the local mountains (forested "sky islands) reopened after 2 months of fire closure:
Think the Atacama is classified as a rainshadow desert - IIRC from my desert geography class.... almost 20 yrs ago : ( Usually a mountain range causes the precip to come down due to cooling, leaving nothing left for deserts on the leeward side of the range, usually. However, sometimes there's enough moisture to produce rain or, in case of a cold front, snow. The Atacama is somewhat similar to my own desert, the Chihuahuan, including freak snowstorms.
Example: One late November, during an arctic cold front, I drove up to southern Colorado expecting some snow in the Rockies for some snowshoeing but didn't find any. Coming back through Las Cruces NM, I was hit with fluffy snow which mixed moisture from Baja California with the cold front. This continued for the next 20+ miles to my old residence (almost on the border with Mexico - Juarez area). Looking at the weather channels and websites, this area had the only snow in the continental US and, I think, even most of southern Canada. Kind of cool: I was literally where the US and Mexico meet (also Texas, New Mexico, and Chihuahua), .. with the only snow for most of north America. Geeky kind of cool, anyways.
Normally the Chihuahuan desert is relatively drier since the neighboring "wet" Sonoran desert and Sierra Madre/Mogollon mountains cause a rain shield. During monsoon season (now), the area gets excess moisture from Pacific monsoons and sometimes Gulf of Mexico hurricanes. Also the wetter Sonoran desert has a couple more rainy seasons than we do but if there's excess moisture, it may come over the Arizona/New Mexico state line as rain or snow.
Of course this year the American desert southwest suffered through La Nina "superdrought" and forecasters are calling for another La Nina next year too. Far worse for the people of central Texas, though.
Edited by hknewman on 08/19/2011 15:07:28 MDT.
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