Severe Thunderstorm Warning 123, NWS Nashville, TN

Area Forecast Discussion
National Weather Service Nashville TN
1259 PM CDT Tue Aug 20 2019

.UPDATE...
FOR 18Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Removed morning wording. Tweaked hrly temp, dewpoint, and wind
speed/direction grids. Current temp trends across mid state region
generally in line with forecasted afternoon high temp values.
Remainder of the forecast continues to be on track.

&&

.AVIATION...
18Z TAF DISCUSSION.

Isolated -SHRA have begun popping up west of BNA and north of CSV,
with VCSH at all airports this afternoon. Large complex of TSRA
across Illinois will move southeast and weaken as it moves across
all airports this evening, with -SHRA/VCTS. Precip should be out
of terminals by 03-05Z. Light south to west winds this afternoon
will become northwest with convection this evening.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for Giles-Hickman-
Houston-Humphreys-Lawrence-Lewis-Perry-Stewart-Wayne.

&&

DISCUSSION......31
AVIATION........Shamburger

Hazardous Weather Outlook...UPDATED
National Weather Service Nashville TN
1203 PM CDT Tue Aug 20 2019

TNZ005>011-023>034-056>066-075-077>080-093>095-211000-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-
Jackson-Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-
Maury-Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-
Coffee-Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
1203 PM CDT Tue Aug 20 2019

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...This Afternoon and Tonight

Excessive heat is likely for locations approaching the Tennessee
River Valley and across southwestern portions of the mid state
this afternoon as maximum heat indices values approach 107
degrees. For locations west of the Cumberland Plateau Region,
maximum afternoon heat index values are expected to range
between 100-105 degrees.

Some strong thunderstorms, along with a few severe thunderstorms,
will be possible this afternoon and evening mainly for locations
around and north of I-40. With any strong to severe thunderstorms
that do develop, strong to damaging wind gusts will be the main
concerns.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Maximum afternoon heat index values Wednesday afternoon will be
around 100 degrees for locations west of Cumberland Plateau
Region.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may possibly be needed this afternoon and
evening.

Spotter Thunderstorm Reporting Criteria...
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 Inch
Winds > 50 MPH (Measured)
Structural Damage
Trees or Power Lines Down

31

Special Weather Statement...UPDATED
National Weather Service Nashville TN
1245 PM CDT Tue Aug 20 2019

TNZ006>009-025>029-059>062-075-210000-
Montgomery-Robertson-Sumner-Macon-Dickson-Cheatham-Davidson-
Wilson-Trousdale-Williamson-Maury-Marshall-Rutherford-Bedford-
Including the cities of Clarksville, Springfield, Hendersonville,
Gallatin, Goodlettsville, Lafayette, Dickson, Ashland City,
Kingston Springs, Nashville, Lebanon, Mount Juliet, Hartsville,
Franklin, Brentwood, Columbia, Lewisburg, Murfreesboro, Smyrna,
La Vergne, and Shelbyville
1245 PM CDT Tue Aug 20 2019

...Hot and Humid Conditions Expected Today...

Heat and humidity will increase across Middle Tennessee today.
Across central portions of the mid state, maximum afternoon
heat index values will range from 100 to 105 degrees during the
afternoon hours. Specifically, this will be for locations
generally along and east of a Clarksville to Lewisburg line
to locations generally along and west of a Lafayette to
Shelbyville line.

Take extra precautions if you work or spend time outside.
Remember to drink plenty of fluids, stay in air conditioning when
possible, and limit exposure to the sun. Be sure to check on
relatives, neighbors, and the elderly. Young children and pets
should never be left unattended in vehicles as car interiors can
reach lethal temperatures in a matter of minutes.

For additional heat safety tips and resources, visit
weather.gov/safety/heat.

31

Special Weather Statement
National Weather Service Nashville TN
216 PM CDT Tue Aug 20 2019

TNZ026-027-202000-
Davidson TN-Cheatham TN-
216 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DAVIDSON AND SOUTH
CENTRAL CHEATHAM COUNTIES UNTIL 300 PM CDT...

At 216 PM CDT, Doppler radar was tracking a strong thunderstorm over
Pegram, or 11 miles south of Ashland City. This storm was nearly
stationary.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Pegram and Bellevue.

This includes Interstate 40 between mile markers 192 and 199.

LAT...LON 3618 8697 3608 8689 3604 8702 3614 8707
      3617 8699
TIME...MOT...LOC 1916Z 246DEG 0KT 3611 8701

13

Special Weather Statement
National Weather Service Nashville TN
239 PM CDT Tue Aug 20 2019

TNZ027-202000-
Davidson TN-
239 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DAVIDSON COUNTY UNTIL 300
PM CDT...

At 239 PM CDT, Doppler radar was tracking a strong thunderstorm near
East Nashville. This storm was nearly stationary.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Madison.
East Nashville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3628 8672 3614 8661 3613 8673 3624 8686
TIME...MOT...LOC 1939Z 067DEG 1KT 3619 8672

13

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Special Weather Statement
National Weather Service Nashville TN
328 PM CDT Tue Aug 20 2019

TNZ025-057-202115-
Hickman TN-Dickson TN-
328 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DICKSON AND
NORTHEASTERN HICKMAN COUNTIES UNTIL 415 PM CDT...

At 328 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Burns, or 9 miles south of Dickson. This storm was
nearly stationary.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Dickson, Lyles and Bon Aqua.

This includes the following highways...
 Interstate 40 between mile markers 161 and 175, and between mile
markers 177 and 178.
 Interstate 840 between mile markers 1 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3584 8723 3588 8752 3604 8753 3602 8721
TIME...MOT...LOC 2028Z 193DEG 2KT 3594 8733

13

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
335 PM CDT TUE AUG 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     TSTM WND DMG     2 SE EAST NASHVILLE     36.15N  86.73W
08/20/2019                   DAVIDSON           TN   SOCIAL MEDIA

            ROOF DAMAGE OCCURRED TO A BUSINESS WITH PART OF A ROOF
            BLOWN ONTO LEBANON PIKE.

&&

EVENT NUMBER OHX1900531

13