Special Weather Statement, NWS Nashville, TN

Area Forecast Discussion
National Weather Service Nashville TN
823 PM CDT Tue Apr 3 2018

.UPDATE...
FOR EVENING DISCUSSION.

&&

.DISCUSSION...

With latest SPC day one evening convective outlook emphasizing
the potential for damaging winds more versus large hail across
the mid state region, removed the large hail reference in the
zone forecast product. This is not saying that large hail will not
still be a threat with an isolated svr tstm or two, but damaging
winds potential is the main threat this evening. Tweaked hrly
temp, dewpoint, and wind speed/direction grids. Remainder of
forecast continues to be on track.

&&

.AVIATION...
00Z TAF DISCUSSION.

CKV/BNA/MQY/CSV...Will continue close to timing reasoning
of 18Z TAF forecast issuance as consensus of short range
model guidance continues to support. VFR conditions should
generally prevail before 04/02Z. Sfc pressure gradient
influences should continue to support gusts as high as
35kts ahead of, along, and shortly behind strong sfc frontal
passage. Sfc winds will veer from SW ahead of to NW behind
frontal passage. As strong sfc frontal boundary moves across
mid state 04/00Z-04/06Z, increasing chances of shwrs and tstms,
with ceilings lowering to at least MVFR thresholds, possible.
Decreasing cloudiness expected behind frontal passage as upper
level troughing influences move eastward and sfc ridging
influences build into mid state region.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 10 PM CDT this evening for Bedford-Cannon-
Cheatham-Clay-Coffee-Davidson-De Kalb-Dickson-Giles-Hickman-
Houston-Humphreys-Jackson-Lawrence-Lewis-Macon-Marshall-Maury-
Montgomery-Perry-Robertson-Rutherford-Smith-Stewart-Sumner-
Trousdale-Wayne-Williamson-Wilson.

&&

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

Hazardous Weather Outlook
National Weather Service Nashville TN
501 AM CDT Tue Apr 3 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-041015-
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-
501 AM CDT Tue Apr 3 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight.

Severe storms are possible late this afternoon and evening for all
of Middle Tennessee, however the best chances will be along and
west of I-65. The primary threat is damaging straight-line winds.
Large hail and isolated tornadoes will also be possible.

In addition, a Wind Advisory is in effect for areas west of the
Cumberland Plateau from 10 am this morning through 10 pm this
evening. South to southwest winds of 15 to 25 mph with gusts of 35
to 45 mph at times. These non-thunderstorm winds may blow down a
few trees, tree limbs, or power lines.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Freezing temperatures and widespread of frost are possible
Thursday morning across all of Middle Tennessee.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is being requested for the severe weather
potential this evening.

Spotter Thunderstorm Reporting Criteria:
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 inch
Measured winds of >50 mph
Structural Damage
Downed Trees or Power lines

27

Special Weather Statement
National Weather Service Nashville TN
826 PM CDT TUE APR 3 2018

TNZ005-006-023>026-040215-
Stewart TN-Dickson TN-Humphreys TN-Cheatham TN-Montgomery TN-
Houston TN-
826 PM CDT TUE APR 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR DICKSON...MONTGOMERY...STEWART...
WESTERN CHEATHAM...HOUSTON AND HUMPHREYS COUNTIES UNTIL 915 PM CDT...

At 825 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Dover to near New Johnsonville. Movement was
east at 55 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Clarksville, Dickson, Waverly, Camden, Dover, Erin, White Bluff,
Kingston Springs, New Johnsonville, McEwen, Burns, Tennessee Ridge,
Hurricane Mills, Big Rock, Charlotte, Vanleer, Cumberland City,
Slayden, Cheatham Dam and Palmyra.

A severe thunderstorm watch remains in effect until 100 AM CDT for
Middle Tennessee.

LAT...LON 3656 8714 3655 8712 3646 8713 3645 8711
      3605 8713 3605 8718 3602 8719 3598 8739
      3599 8753 3597 8753 3595 8756 3587 8794
      3594 8793 3594 8797 3607 8796 3615 8792
      3622 8795 3654 8795 3664 8768 3664 8712
TIME...MOT...LOC 0125Z 253DEG 56KT 3649 8788 3595 8791

Whitehead

Special Weather Statement
National Weather Service Nashville TN
835 PM CDT TUE APR 3 2018

TNZ026-027-059-040215-
Williamson TN-Davidson TN-Cheatham TN-
835 PM CDT TUE APR 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR DAVIDSON...NORTHWESTERN
WILLIAMSON AND SOUTHEASTERN CHEATHAM COUNTIES UNTIL 915 PM CDT...

At 834 PM CDT, Doppler radar was tracking several strong
thunderstorms from 10 miles west of Franklin, northeast to the
south Nashville area. Movement was northeast at 50 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Franklin, Ashland City, Nashville, Brentwood, Forest Hills, Oak Hill,
Belle Meade, Kingston Springs, Pegram, Bellevue, Antioch, Fairview,
Joelton, Berry Hill, Bells Bend, Whites Creek, Natchez Trace At
Highway 96, Beaman Park, Leipers Fork and Percy Priest Lake.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.

A severe thunderstorm watch remains in effect until 100 AM CDT for
Middle Tennessee.

LAT...LON 3615 8656 3614 8655 3614 8654 3613 8653
      3611 8654 3610 8652 3608 8652 3608 8653
      3609 8655 3607 8655 3585 8704 3598 8719
      3638 8692
TIME...MOT...LOC 0134Z 239DEG 49KT 3598 8701

13

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
848 PM CDT TUE APR 03 2018

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

0835 PM     HAIL             8 S NASHVILLE           36.06N  86.78W
04/03/2018  E0.50 INCH       DAVIDSON           TN   AMATEUR RADIO

            HALF INCH HAIL AT TAMPA DRIVE AND SPARTAN DRIVE

&&

EVENT NUMBER OHX1800319

21

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
900 PM CDT TUE APR 03 2018

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

0835 PM     TSTM WND DMG     ERIN                    36.32N  87.70W
04/03/2018                   HOUSTON            TN   EMERGENCY MNGR

            TREE DOWN AT 1245 OLD HERRIN ROAD

&&

EVENT NUMBER OHX1800321

21

Special Weather Statement
National Weather Service Nashville TN
903 PM CDT TUE APR 3 2018

TNZ008-028>030-040245-
Wilson TN-Trousdale TN-Sumner TN-Smith TN-
903 PM CDT TUE APR 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SMITH...SOUTHEASTERN
SUMNER...WILSON AND TROUSDALE COUNTIES UNTIL 945 PM CDT...

At 903 PM CDT, Doppler radar was tracking a strong thunderstorm near
Belinda City, or near Lebanon, moving northeast at 50 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Gallatin, Lebanon, Carthage, Hartsville, Hendersonville, Mount
Juliet, Gordonsville, Belinda City, South Carthage, Tuckers
Crossroads, Dixon Springs, Bledsoe Creek State Park, Dickerson Chapel
Recreation Area and Gladeville.

A severe thunderstorm watch remains in effect until 100 AM CDT for
Middle Tennessee.

LAT...LON 3652 8621 3651 8621 3649 8623 3648 8619
      3644 8617 3644 8611 3620 8586 3603 8638
      3604 8639 3604 8640 3627 8660 3654 8622
TIME...MOT...LOC 0203Z 238DEG 45KT 3619 8642

13