When:
Lookups spiked on July 6, 2011.
Why:
On July 5, a massive dust storm rolled through Phoenix, AZ.
In describing the mile-high billowing wave, many media reports (and viral videos like this) referred to the storm as a "haboob."
The word comes from the Arabic habŪb, which means "violent storm".
Photo credit: Titoxd / flickr
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Merriam-Webster unabridged
