1. On August 13, 1904, the Oklahoma Territory held its first gubernatorial election, resulting in the election of Frank Frantz as the first governor of the territory. Frantz went on to serve two terms as governor and played a key role in helping Oklahoma achieve statehood in 1907.

2. In 1935, on August 13, Oklahoma City experienced a severe dust storm that caused widespread damage and blew down power lines and trees. The storm lasted for several hours, and residents were forced to take cover indoors to avoid the choking dust.

3. On August 13, 1942, the U.S. War Department announced that the city of Duncan, Oklahoma, would be the site of a new training camp for the United States Army's Air Corps. The camp became known as the Frederick Army Air Field and was used to train pilots during World War II.

4. In 1976, on August 13, the Oklahoma City Zoo opened a new exhibit featuring two rare white Bengal tigers. The tigers, named Sitar and Sariska, were a major attraction at the zoo and helped draw thousands of visitors each year.

5. On August 13, 1998, a tornado struck downtown Tulsa, causing significant damage to buildings and injuring dozens of people. The tornado was rated F2 on the Fujita Scale and was one of the most destructive tornadoes to hit the city in recent history.