Photo by Jason Blakeslee
This postcard is unused.
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Most of Oklahoma lies in an area known as Tornado Alley characterized by frequent interaction between cold, dry air from Canada, warm to hot, dry air from Mexico and the Southwestern U.S., and warm, moist air from the Gulf of Mexico. The interactions between these three contrasting air currents produces severe weather. An average 62 tornadoes strike the state per year—one of the highest rates in the world.
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