Tuesday, October 7, 2014

The 100th Meridian West

Mitchell, South Dakota where we are ended up today is at 98 West.   The 100th Meridian West roughly marks the western boundary of the normal reach of moist air from the Gulf of Mexico, and the approximate boundary (although some areas do push the boundary slightly farther east) between the semi-arid climate to the west and the humid continental(north of about 37°N) and humid subtropical (south of about 37°N) climates to the east.   So in other words, we are almost home.

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