Dangerous heat will envelop Middle Tennessee this weekend.
By Sunday, many areas could face heat indices high enough to trigger heat advisories. Temperatures are expected to hit near 90 degrees Fahrenheit or above, with heat indices likely climbing over 100 degrees Fahrenheit in Nashville, Clarksville, Waverly, Columbia and Waynesboro, according to the National Weather Service.
Heat will continue into next week due to two weather patterns: Moisture blowing up from the Gulf of Mexico will amplify a heat dome, an area of high pressure in the upper atmosphere that traps heat and humidity…