Five years of American drought, visualized

At Adventures in Mapping, John Nelson developed a sobering series of maps that visualize the intensity of the drought gripping much of the US:

This is a map showing over five years of drought data (285 weeks, combined into a single view) in the United States. The dots are proportionally sized by the amount of time over the past five years spent in drought (the largest dots representing 80% – 100% of the time), and the color is a weighted value of the overall intensity of those droughts (deep purple indicates frequent "exceptional" drought, the most severe category).

Lots of other beautiful but disturbing maps in the post.

Five Years of Drought (via Adventures in Mapping)