Source: US National Oceanic and Atmospheric Administration
Note: The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.Note: Click for Watch Status Reports.
SEL1
URGENT – IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 271
NWS Storm Prediction Center Norman OK
835 PM CDT Fri May 16 2025
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Middle and Eastern Tennessee
Far Southwest Virginia
* Effective this Friday night and Saturday morning from 835 PM
until 300 AM CDT.
* Primary threats include…
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY…Both supercells and a line of thunderstorms should pose a
threat for a few tornadoes this evening and overnight as they spread
east-southeastward. A strong tornado remains possible, especially
with any supercell that can be maintained ahead of the line.
Scattered severe/damaging winds appear likely, with peak gusts
potentially reaching up to 60-75 mph. Occasional large hail may also
occur.
The tornado watch area is approximately along and 40 statute miles
north and south of a line from 80 miles west southwest of Nashville
TN to 45 miles east northeast of Knoxville TN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS…
REMEMBER…A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION…CONTINUE…WW 265…WW 267…WW
268…WW 269…WW 270…
AVIATION…Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 28035.
…Gleason
SEL1
URGENT – IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 271
NWS Storm Prediction Center Norman OK
835 PM CDT Fri May 16 2025
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Middle and Eastern Tennessee
Far Southwest Virginia
* Effective this Friday night and Saturday morning from 835 PM
until 300 AM CDT.
* Primary threats include…
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY…Both supercells and a line of thunderstorms should pose a
threat for a few tornadoes this evening and overnight as they spread
east-southeastward. A strong tornado remains possible, especially
with any supercell that can be maintained ahead of the line.
Scattered severe/damaging winds appear likely, with peak gusts
potentially reaching up to 60-75 mph. Occasional large hail may also
occur.
The tornado watch area is approximately along and 40 statute miles
north and south of a line from 80 miles west southwest of Nashville
TN to 45 miles east northeast of Knoxville TN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS…
REMEMBER…A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION…CONTINUE…WW 265…WW 267…WW
268…WW 269…WW 270…
AVIATION…Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 28035.
…Gleason
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW1
WW 271 TORNADO TN VA 170135Z – 170800Z
AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
80WSW BNA/NASHVILLE TN/ – 45ENE TYS/KNOXVILLE TN/
..AVIATION COORDS.. 35NM N/S /64NNW MSL – 32ENE VXV/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 28035.
LAT…LON 36258800 36658326 35498326 35098800
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 271 Status Report Message has not been issued yet.
Note: Click for Complete Product Text.Tornadoes
Probability of 2 or more tornadoes
Mod (60%)
Probability of 1 or more strong (EF2-EF5) tornadoes
Mod (40%)
Wind
Probability of 10 or more severe wind events
High (70%)
Probability of 1 or more wind events > 65 knots
Mod (40%)
Hail
Probability of 10 or more severe hail events
Mod (40%)
Probability of 1 or more hailstones > 2 inches
Mod (30%)
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
High (90%)
For each watch, probabilities for particular events inside the watch (listed above in each table) are determined by the issuing forecaster. The “Low” category contains probability values ranging from less than 2% to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities), “Moderate” from 30% to 60%, and “High” from 70% to greater than 95%. High values are bolded and lighter in color to provide awareness of an increased threat for a particular event.