This Day in Weather History

On This Day In Weather History - July 21
Local
2010	North Central Missouri areas experienced up to 8 to 10 inches of rain over the 19th and 20th. Severe thunderstorms also produced an EF0 tornado 9 miles east of Princeton.
National
1983	Vostok, Antarctica recorded the coldest temperature ever on the planet: 129 degrees below zero.
1987	An F4 tornado swept through Yellowstone National Park leaving a path of destruction up and down a 10,000 ft mountain, the highest elevation an F4 has been recorded. 15,000 acres of trees were downed.