Knoxville Weather News - September 4, 2025

KNOXVILLE, TN (September 4, 2025) - Knoxville kicked off today with mostly cloudy skies and a comfortable 66.9 °F at McGhee Tyson Airport at 6:53 AM UTC, under a gentle southeast breeze of 10.4 mph and light precipitation of 0.01 in in the past hour.

This morning, the National Weather Service issued a tornado warning for Knox County until 1:30 PM EDT, advising residents to seek shelter in interior, windowless areas amid reports of rotating storm cells passing through East Tennessee.

By midday, skies remained partly cloudy, and temperatures climbed to a high of 81 °F, slightly above September averages. Humidity levels rose under south-southeast winds feeding moisture ahead of a cold front sweeping through the region.

Looking ahead to the evening, atmospheric conditions support the development of strong scattered thunderstorms, with a marginal risk of severe storms. Storms are expected to initiate in the Great Smoky Mountains before tracking toward the Knoxville metro after sunset. Residents are urged to stay alert for rapid changes, with potential gusts up to 60 mph and quarter-sized hail in localized cells.

Tonight’s low will settle near 63 °F, and the risk of showers or thunder decreases after midnight as the front moves east. Tomorrow promises drier conditions with cooler air filtering into East Tennessee, offering a crisp start to the weekend.