Afternoon heat index values are expected to be 100 to 105 degrees Today through Sunday.
Nashville, TN – The National Weather Service (NWS) says there is a potential for severe thunderstorms tonight across Clarksville-Montgomery County as well as Middle Tennessee as a complex of showers and thunderstorms is expected to move into the mid state in association with an established northwesterly upper level flow pattern aloft.
The storm prediction center in Norman, OK has placed locations generally around and northeast of a Erin to Franklin to McMinnville line in an enhanced risk for severe thunderstorms.A slight risk of severe thunderstorms is expected for the rest of the mid state as a complex of showers and thunderstorms is expected to move into eastern portions of Middle Tennessee as the evening hours progress, especially across the upper Cumberland region.
Some thunderstorms may reach severe thresholds with damaging winds the main concern, although large hail and possibly an isolated tornado or two can not be totally ruled out either.
Some of these thunderstorms could also contain brief heavy rainfall resulting in localized flooding. As this complex of showers and thunderstorms moves across and southeastward out of Middle Tennessee later tonight. It will leave outflow boundaries across the area and along with expected upper level northwesterly flow ushering in additional disturbances to the region.
This could result in a redevelopment of showers and thunderstorms across at least the eastern half of the mid state Tuesday afternoon with again the greatest potential for severe thunderstorms across the upper Cumberland region.
Thus, the Storm Prediction Center in Norman, OK has placed locations generally around and east of the I-65 corridor in an enhanced risk for severe thunderstorms with other locations across the mid state in a slight risk for severe thunderstorms for Tuesday afternoon.
With severe thunderstorms that do occur, damaging winds will once again be a main concern but there will be a greater chance of tornadoes and large hail occurrences than the severe thunderstorm activity expected across the mid state tonight. Again, some of these thunderstorms could also contain brief heavy rainfall resulting in localized flooding.
Along with the above severe weather potential, afternoon heat index values this afternoon through Sunday will generally range from 100 to 105 degrees for locations west of the Cumberland plateau region. This is the result of building upper level ridging influences from the southern and central plains becoming more pronounced across the mid state along with warm, moist, and thus humid air being ushered in from the Gulf of Mexico.
It is important that you take the proper precaution and preparedness actions in dealing with this heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening.
Remember when exiting your vehicle to check the back seat for children. To reduce risk during outdoor work, the occupational safety and health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.
Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency, call 911.
Please stay tuned to local media, NOAA weather radio and the national weather service Nashville Tennessee website at www.weather.gov/nashville for the latest on these developing severe weather and afternoon heat index value situations.
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