 This day in weather history, 1981, we had an F1 tornado that moved through Broken Arrow that damaged a mobile home and injured five people. We had severe thunderstorms in 2000 that caused a lot of wind damage in the early morning. In 2018, heat, 100 to 105 degrees with a high humidity. Heat index values above 110 with Pawnee and Bristow-Mesonet recording heat index values of 120 degrees.