The Great Plains Between Two Taller Mountains

In this alternate scenario, only the Rocky Mountains and the Appalachians stand firm in the United States. Even so, some differences apply.

The Appalachian Mountains (right) have grown to as tall as the Sierra Nevada--14,505 feet above sea level. The Rocky Mountains (left) have grown to the height of Denali, 20,310 feet above sea level. Marked in orange is a plateau varying in elevation above sea level from 3300 to 16,000 feet.

For the sake of scope, let's just narrow down to the Midwest, dominated by the prairies of the Great Plains. With a closer Rockies, both ranges being dramatically taller and a plateau blocking off the warm, dry air crucial for the creation of Tornado Alley, would the Midwest still be prairie?

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The Great Plains Between Two Taller Mountains

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