What is Drought?

 Historical Graphs of the Palmer Drought Index



Click on a river basin to view its drought history, or choose from the list of basins below the clickable map.

Pacific Northwest Basin California Basin Lower Colorado Basin Great Basin Upper Colorado Basin Rio Grande Basin Texas Gulf Basin Arkansas-White-Red Basin Lower Mississippi Basin Missouri Basin Souris-Red-Rainy Basin Upper Mississippi Basin Great Lakes Basin Tennessee Basin Ohio Basin South Atlantic Gulf Basin Mid-Atlantic Basin New England Basin

(1) Pacific Northwest Basin
(2) California Basin
(3) Great Basin
(4) Lower Colorado Basin
(5) Upper Colorado Basin
(6) Rio Grande Basin
(7) Texas Gulf Basin
(8) Arkansas–White–Red Basin
(9) Lower Mississippi Basin		 (10) Missouri Basin
(11) Souris–Red–Rainy Basin
(12) Upper Mississippi Basin
(13) Great Lakes Basin
(14) Tennessee Basin
(15) Ohio Basin
(16) South Atlantic Gulf Basin
(17) Mid-Atlantic Basic
(18) New England Basin

 

 

 

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