Special Weather Statement, NWS Nashville, TN

Area Forecast Discussion
National Weather Service Nashville TN
728 PM CDT Tue Aug 22 2017

.UPDATE...
FOR 00Z AVIATION DISCUSSION.

&&

.DISCUSSION...

A wide band of showers has developed across Middle Tennessee early
this afternoon. Additional activity is occurring farther
upstream, just on the other side of the Ohio River in the vicinity
of a surface boundary that is approaching Middle Tennessee.
Latest HRRR shows the activity persisting throughout the
afternoon, and even increasing late this afternoon and into the
evening as the front pushes into Middle Tennessee. Most of the
cells will diminish by 06Z, with some lingering showers mainly
across eastern and southern Middle Tennessee tomorrow morning
before the front finally exits the mid state. There is a marginal
risk of severe storms this afternoon and evening, but the
potential for severe activity is quite limited. Expect cooler
temperatures beginning tomorrow as post-frontal air filters into
the mid state, and below normal temperatures will persist right
through the end of the forecast period. The remainder of the week
looks to be dry, so we won't see any appreciable rain chance until
the weekend as deeper moisture drifts up from the south in
advance of a tropical system coming onshore along the western Gulf
of Mexico. At this time, it appears that the tropical system will
have a more direct impact on Middle Tennessee next Thursday and
Friday, and already the GFS and ECMWF are coming into good
agreement over placement and timing.

&&

.AVIATION...
00Z TAF DISCUSSION.

A line of thunderstorms is moving across the midstate this
evening. The line has already cleared CKV and will clear BNA by
01z. CSV will likely see at least vcts between 01 and 04z this
evening with gusty winds off and on as the front moves through.
Winds will calm shift out of the north after the precip passes.
Lower visibilities will be possible at all sites after midnight as
fog develops. By 14z conditions should begin to return to MVFR
and VFR as drier air makes its way into the area and cloud cover
decreases.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

DISCUSSION......08
AVIATION........11

Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CDT Tue Aug 22 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-231000-
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-
500 AM CDT Tue Aug 22 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Some isolated locations this afternoon across central and western
portions of Middle Tennessee may experience heat index readings
approaching 105 degrees.

Some strong thunderstorms will be possible late this afternoon
through the early evening hours across Middle Tennessee. Strong
gusty straight line winds and brief heavy rainfall will be the
main concerns with any strong thunderstorms that do develop.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late this afternoon through the
early evening hours.

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
National Weather Service Nashville TN
644 PM CDT TUE AUG 22 2017

TNZ008-027-028-230030-
Davidson TN-Wilson TN-Sumner TN-
644 PM CDT TUE AUG 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DAVIDSON...SOUTHERN
SUMNER AND NORTHWESTERN WILSON COUNTIES UNTIL 730 PM CDT...

At 644 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hendersonville, or 8 miles west of Gallatin, moving southeast at 20
mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Gallatin, Lebanon, Hendersonville, Mount Juliet, Goodlettsville,
Millersville, Lakewood, Old Hickory, Belinda City, Rural Hill and
Dickerson Chapel Recreation Area.

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 3634 8627 3633 8626 3632 8627 3630 8627
      3630 8625 3634 8625 3632 8619 3613 8651
      3632 8676 3643 8658
TIME...MOT...LOC 2344Z 302DEG 18KT 3634 8659

Barnwell

Special Weather Statement
National Weather Service Nashville TN
652 PM CDT TUE AUG 22 2017

TNZ027-059-230030-
Williamson TN-Davidson TN-
652 PM CDT TUE AUG 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DAVIDSON AND
NORTHEASTERN WILLIAMSON COUNTIES UNTIL 730 PM CDT...

At 652 PM CDT, Doppler radar was tracking a strong thunderstorm over
Belle Meade, or near Nashville, moving east at 25 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Nashville, Hendersonville, Brentwood, La Vergne, Nolensville, Forest
Hills, Oak Hill, Belle Meade, Lakewood, Hermitage, Bellevue, Antioch,
Rural Hill, Berry Hill, Bells Bend and Percy Priest Lake.

Nashville Sounds Baseball will also be impacted.

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.

&&

LAT...LON 3625 8659 3614 8656 3614 8653 3611 8654
      3611 8652 3606 8653 3608 8653 3609 8655
      3607 8655 3606 8656 3604 8656 3601 8661
      3599 8662 3599 8693 3620 8695 3625 8662
TIME...MOT...LOC 2352Z 265DEG 24KT 3612 8687

Barnwell

Special Weather Statement
National Weather Service Nashville TN
711 PM CDT TUE AUG 22 2017

TNZ058-093-094-230100-
Lawrence TN-Wayne TN-Lewis TN-
711 PM CDT TUE AUG 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR LEWIS...WAYNE AND LAWRENCE
COUNTIES UNTIL 800 PM CDT...

At 710 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Waynesboro, moving east at 35 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Lawrenceburg, Hohenwald, Waynesboro, Collinwood, Summertown, Clifton,
Ethridge, Henryville, Cypress Inn, Flatwoods, Lutts, Westpoint and
Iron City.

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 3501 8799 3529 8798 3530 8801 3539 8802
      3539 8799 3541 8797 3542 8800 3547 8786
      3548 8783 3549 8775 3548 8772 3551 8769
      3554 8769 3561 8752 3538 8721 3530 8722
      3500 8761
TIME...MOT...LOC 0010Z 290DEG 31KT 3542 8773

Barnwell

Special Weather Statement
National Weather Service Nashville TN
723 PM CDT TUE AUG 22 2017

TNZ008-027-028-230115-
Davidson TN-Wilson TN-Sumner TN-
723 PM CDT TUE AUG 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL DAVIDSON...SOUTHERN
SUMNER AND NORTHWESTERN WILSON COUNTIES UNTIL 815 PM CDT...

At 723 PM CDT, Doppler radar was tracking a strong thunderstorm over
Hermitage, or 9 miles east of Nashville, moving east at 25 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Gallatin, Lebanon, Madison, Hendersonville, Mount Juliet,
Goodlettsville, Lakewood, Hermitage, Belinda City, Old Hickory, Rural
Hill, Bledsoe Creek State Park and Percy Priest Lake.

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 3612 8667 3629 8672 3642 8631 3613 8623
TIME...MOT...LOC 0023Z 254DEG 24KT 3620 8662

Barnwell

Special Weather Statement
National Weather Service Nashville TN
735 PM CDT TUE AUG 22 2017

TNZ028-062-063-230115-
Cannon TN-Rutherford TN-Wilson TN-
735 PM CDT TUE AUG 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN RUTHERFORD...SOUTHERN
WILSON AND NORTHWESTERN CANNON COUNTIES UNTIL 815 PM CDT...

At 735 PM CDT, Doppler radar was tracking a strong thunderstorm near
Smyrna, or 11 miles north of Murfreesboro, moving east at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Murfreesboro, Smyrna, La Vergne, Watertown, Walterhill, Rural Hill,
Auburntown, Cedars Of Lebanon State Park, Lascassas, Milton and
Gladeville.

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 3612 8607 3588 8604 3589 8658 3603 8659
      3604 8656 3606 8656 3607 8655 3609 8655
      3608 8653 3606 8653 3610 8652 3611 8654
      3613 8653 3616 8609
TIME...MOT...LOC 0035Z 266DEG 27KT 3601 8646

Barnwell

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