Description

Hi All,

The main story for July was the high heat and humidity that spread across the state for the second half of the month. Most counties in the state saw at least 1 day with a heat advisory or extreme heat warning issued by the National Weather Service due to a combination of high temperatures and humidity that sent heat index values above advisory/warning criteria. The western half of the state saw higher heat index values and were impacted by the heat wave for a longer period of time than the eastern half of the state. Some part of the Memphis National Weather Service office’s county warning area was under a heat advisory or extreme heat warning every day from July 16 to the end of the month. Based on mean temperatures for the month, Oak Ridge recorded the warmest July in the city’s 79-year weather history, Nashville tied for the warmest July in the city’s 152-year weather history, Knoxville had the 2nd warmest July in the city’s 155-year weather history, Bristol/Tri-Cities tied for the 5th warmest July in the area’s 78-year weather history, and Chattanooga tied for the 7th warmest July in the city’s 147-year history. There were only two tied record daily high temperatures across the state this month, but there were 79 broken and 99 tied daily records for warmest low temperatures. Rainfall was very sporadic across the state this month with many counties in the state having areas that recorded above and below normal precipitation. Most of the rains came from slow moving thunderstorms that produced high amounts of rain locally in a short period of time, resulting in minor flash flooding. Areas that missed out on those thunderstorms remained drier than normal for the month. A few small areas in Maury and McMinn Counties recorded less than 10% of their normal July rainfall. The first and fourth weeks were generally the driest, with few areas recording above normal precipitation. Potential flash drought conditions are increasing through the first few weeks of August in the western half of the state. The August summary will include more info about recent flooding in Chattanooga and expanding drought conditions in western TN. Stay cool everybody!

Andrew & Wil

Tennessee Climate Office

East Tennessee State University

Department of Geosciences

Publication Date

7-2025

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