Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 129, NWS Nashville, TN

July 5, 2018Lawrence County, Wayne County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 5, 2018, 4:27 PM CDT for Lawrence County, Wayne County, Tennessee. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 5, 2018, 4:27 PM CDT (21:27 UTC)
Expired: Jul 5, 2018, 5:15 PM CDT
In force: 48 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lawrence County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 138 km from the middle of the area, began a volume at 21:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 5, 4:30 PM CDT	TSTM WND DMG	4 S Lawrenceburg, TN	REPORT OF TREE DOWN BLOCKING THE ROADWAY AT 116 DUNN LEOMA ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 3 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.5 hours before the alert went out and 146 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 347 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1409 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

294 
WUUS54 KOHX 052127
SVROHX
TNC099-181-052215-
/O.NEW.KOHX.SV.W.0129.180705T2127Z-180705T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
427 PM CDT THU JUL 5 2018

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wayne County in Middle Tennessee...
  Southern Lawrence County in Middle Tennessee...

* Until 515 PM CDT.

* At 426 PM CDT, a severe thunderstorm was located near Leoma, or 7 
  miles south of Lawrenceburg, moving west at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated. This storm has a history of blowing down 
           trees in Giles County.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  South Lawrenceburg, Loretto, Collinwood, St. Joseph, Leoma, 
  Westpoint, Iron City and Cypress Inn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3501 8785 3528 8785 3522 8723 3504 8723
      3500 8753
TIME...MOT...LOC 2126Z 091DEG 32KT 3514 8738 

HAIL...<.75IN
WIND...60MPH
 
$$

Shamburger

3 follow-up statements

941 
WWUS54 KOHX 052140
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
440 PM CDT THU JUL 5 2018

TNC099-181-052215-
/O.CON.KOHX.SV.W.0129.000000T0000Z-180705T2215Z/
Wayne TN-Lawrence TN-
440 PM CDT THU JUL 5 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN WAYNE AND SOUTHWESTERN LAWRENCE COUNTIES...

At 439 PM CDT, a severe thunderstorm was located near Loretto, or 12
miles southwest of Lawrenceburg, moving west at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Emergency management. At 431 PM CDT, trees were reportedly 
         knocked down in Lawrenceburg and the roof was blown off a 
         shed in eastern Lawrence County with this storm.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Lawrenceburg, Loretto, Collinwood, St. Joseph, Leoma, Westpoint, Iron
City and Cypress Inn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3501 8785 3528 8785 3521 8732 3503 8732
TIME...MOT...LOC 2139Z 089DEG 31KT 3514 8751 

HAIL...<.75IN
WIND...60MPH
 
$$

Shamburger

084 
WWUS54 KOHX 052156
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
456 PM CDT THU JUL 5 2018

TNC099-181-052215-
/O.CON.KOHX.SV.W.0129.000000T0000Z-180705T2215Z/
Wayne TN-Lawrence TN-
456 PM CDT THU JUL 5 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN WAYNE AND SOUTHWESTERN LAWRENCE COUNTIES...

At 455 PM CDT, a severe thunderstorm was located near Westpoint, or 
14 miles southeast of Waynesboro, moving west at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Emergency management. At 449 PM CDT, several trees were 
         reportedly blown down in Lawrenceburg and Leoma with this 
         storm.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Collinwood, St. Joseph and Westpoint. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3501 8785 3528 8785 3522 8748 3505 8748
TIME...MOT...LOC 2155Z 090DEG 26KT 3514 8763 

HAIL...<.75IN
WIND...60MPH
 
$$

Shamburger

262 
WWUS54 KOHX 052210
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
510 PM CDT THU JUL 5 2018

TNC099-181-052220-
/O.EXP.KOHX.SV.W.0129.000000T0000Z-180705T2215Z/
Wayne TN-Lawrence TN-
510 PM CDT THU JUL 5 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WAYNE AND
SOUTHWESTERN LAWRENCE COUNTIES WILL EXPIRE AT 515 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3501 8785 3528 8785 3522 8748 3505 8748
TIME...MOT...LOC 2210Z 091DEG 32KT 3514 8775 

$$

Shamburger

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 5, 3:37 PM CDT, 50 minutes earlier.

Area forecast discussion, Jul 5, 3:37 PM CDT, 50 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
337 PM CDT Thu Jul 5 2018

.DISCUSSION...

Heat advisory continues until 8 pm. Current heat index values are
in the 100 to 105 degree range across the area.

Two areas of convection ongoing this afternoon. Across far
southern middle TN, pva is feeding westward across that area.
Then, we are picking up some speed convergence to our north.
Both areas of convection are moving toward the west and southwest as
mid/upper level ridging stretches w-e and is centered to our
northwest. Look for generally 30 pops for tonight but I may make
an upward tweak at transmission time given the upcoming latest
radar trends. Otw, deep moisture not indicated, nor do we see much
upper divergence after 06z which would support more in the way of
overnight activity.

On Friday, convection should become more widespread as a frontal
boundary reaches the area. Should see activity to our north and
across northern middle TN in the morning prior to midday. Then,
the activity will work southward by afternoon. We are not
currently outlooked but I would not be surprised if a strong tstm
or two occurs over the south. Cape values come up to fairly high
values in the afternoon. Sfc heating will be key. Otw, shear
values are very low. Convection chances will remain into early
evening across the north. Further south, pops will linger a bit.

It is July and it is fair to question just how far south the drier
will reach. We do appear to pick up some 18z capping across the
north on Saturday. Moisture however, will still be hanging on
across southern areas. A slightly favorable cape to cap ratio will
still exist south. Thus, small pops will remain down there. In
fact, will keep low pops going across the far south through Sat
nt. Across the north though, pops will be completely out of the
forecast for Sat nt.

For the near term temps, the oppressive humidity will remain
through Friday afternoon. Temps at that time however, will cut
back a good 5 degrees or so. Then, a brief improvement will
begin. Upper 60s for lows Friday night. Saturdays highs will
feature upper 80s with dewpoints in the upper 60s. This is very
close to seasonal(perhaps a degree or two below) but it will feel
great compared to the hideousness we have been plagued with
recently.

In the extended forecast, I hope you did not expected the relief
to last, because its not going to. The upper high which
transitioned westward across the rockies, will now build back to
the east and will set up across the IL and IN area. Southeasterly
fetch will bring the humidity right back in along with increasing
temps. Low pops will be included every day but the upper high will
be the major factor versus any tropical waves or impulses that
attempt to undercut from the south and southeast. Temps will warm
right back into the lower 90s. The heat will then reach its zenith
for the 7 day forecast around mid week when the mid 90s return.

If you are interested in additional bad news, the 6 to 10 day and
the 8 to 14 day outlooks both indicate above normal temps. My
advice, enjoy Saturday.

&&

.AVIATION...
18Z TAF DISCUSSION.

BNA/MQY/CKV/CSV...As surface temperatures heat up, a CU field is
starting to develop across Middle Tennessee, with scattered
convection expected later this afternoon and into the evening. So
we'll handle this for now with VCTS/CB remarks in the TAF's. Look
for some radiation fog mainly at CSV overnight, then an increased
rain chance tomorrow as a cold front pushes southward across the
region.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      77  88  67  87  71 /  40  70  30  10  10
Clarksville    75  88  66  86  69 /  40  60  20   0   0
Crossville     72  83  66  80  66 /  40  70  30  40  20
Columbia       74  88  68  88  70 /  40  60  30  20  10
Lawrenceburg   73  88  68  87  70 /  40  60  30  30  20
Waverly        74  87  66  86  69 /  30  70  30   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 8 PM CDT this evening for Cheatham-Davidson-
Dickson-Hickman-Houston-Humphreys-Macon-Montgomery-Perry-
Robertson-Rutherford-Smith-Stewart-Sumner-Trousdale-Williamson-
Wilson.

&&

DISCUSSION......21
AVIATION........08

Hazardous weather outlook, Jul 5, 5:00 AM CDT, 11 hours 27 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CDT Thu Jul 5 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-061000-
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 Thu Jul 5 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

A Heat Advisory is in effect again today for the Nashville Metro
area and locations to the west, including Clarksville, Dickson,
Waverly, and Centerville. Heat index values will reach 105 to 110 in
the advisory area. For most other locations in Middle Tennessee,
heat index values are expected to range from 100 to 105.

A couple of thunderstorms could become strong today, with gusty
winds, heavy downpours, and frequent lightning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Thunderstorms are likely Friday, and some of the thunderstorms
could be strong with gusty winds and frequent lightning. Heavy
downpours may cause some localized flash flooding.

.SPOTTER INFORMATION STATEMENT...

Storm spotters should report any severe weather or flooding to the
National Weather Service in Nashville.

13

In the hours before

Local storm report, Jul 5, 12:51 PM CDT, 3 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1251 PM CDT THU JUL 05 2018

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

0155 AM     TSTM WND DMG     2 ENE CHAPMANSBORO      36.32N  87.11W
07/05/2018                   CHEATHAM           TN   EMERGENCY MNGR

            SEVEREL TREES DOWN OR SNAPPED AT THE TOPS ON SWEETHOME
            ROAD AND CHEATHAM DAM HIGHWAY. A FEW HOMES SUSTAINED
            VINYL SIDING DAMAGE.

&&

EVENT NUMBER OHX1800263

HURLEY

Special weather statement, Jul 5, 3:44 PM CDT, 43 minutes before

Special Weather Statement
National Weather Service Nashville TN
344 PM CDT THU JUL 5 2018

TNZ095-052115-
Giles TN-
344 PM CDT THU JUL 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR GILES COUNTY UNTIL 415 PM CDT...

At 344 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Pulaski, moving west at 35 mph.

Pea size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Pulaski, Ardmore, Elkton, Minor Hill, Goodspring, Frankewing and
Prospect.

LAT...LON 3500 8722 3506 8722 3510 8721 3512 8722
      3512 8720 3514 8721 3515 8720 3517 8722
      3520 8722 3520 8721 3523 8722 3528 8721
      3529 8723 3530 8721 3532 8721 3529 8683
      3499 8684
TIME...MOT...LOC 2044Z 092DEG 30KT 3517 8690

Shamburger

Local storm report, Jul 5, 3:59 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
359 PM CDT THU JUL 05 2018

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

0254 PM     TSTM WND DMG     TULLAHOMA               35.37N  86.22W
07/05/2018                   COFFEE             TN   SOCIAL MEDIA

            FACEBOOK PICTURE OF A TREE DOWN ON LYNN STREET IN
            TULLAHOMA. TIME ESTIMATED BASED ON RADAR.

&&

EVENT NUMBER OHX1800264

MACDONALD

Special weather statement, Jul 5, 4:07 PM CDT, 20 minutes before

Special Weather Statement
National Weather Service Nashville TN
407 PM CDT THU JUL 5 2018

TNZ006-007-052200-
Robertson TN-Montgomery TN-
407 PM CDT THU JUL 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MONTGOMERY AND
NORTHWESTERN ROBERTSON COUNTIES UNTIL 500 PM CDT...

At 407 PM CDT, Doppler radar was tracking a strong thunderstorm over
Guthrie, or 12 miles northeast of Clarksville, moving southwest at 10
mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Clarksville and Adams.

LAT...LON 3640 8722 3664 8746 3664 8700
TIME...MOT...LOC 2107Z 044DEG 9KT 3663 8715

Shamburger

Local storm report, Jul 5, 4:22 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
422 PM CDT THU JUL 05 2018

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

0355 PM     TSTM WND DMG     PULASKI                 35.20N  87.03W
07/05/2018                   GILES              TN   EMERGENCY MNGR

            REPORT OF TREES DOWN ON EAST JEFFERSON STREET.

&&

EVENT NUMBER OHX1800265

MACDONALD

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 4, 7:33 PM CDT	Special Weather Statement	OHX	Lawrence	42 min
Jul 4, 8:03 PM CDT	Special Weather Statement	OHX	Wayne	42 min
Jul 4, 8:43 PM CDT	Special Weather Statement	OHX	Wayne	32 min
Jul 5, 1:39 AM CDT	Special Weather Statement	OHX	Cheatham	36 min
Jul 5, 2:12 AM CDT	Special Weather Statement	OHX	Montgomery	33 min
Jul 5, 3:14 AM CDT	Heat Advisory	OHX	Cheatham, Davidson, Dickson, Hickman, Houston, Humphreys and 11 more	17 hr
Jul 5, 3:44 PM CDT	Special Weather Statement	OHX	Giles	31 min
Jul 5, 3:55 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	35 min
Jul 5, 4:07 PM CDT	Special Weather Statement	OHX	Montgomery	53 min
Jul 5, 4:59 PM CDT	Special Weather Statement	OHX	Montgomery	31 min
Jul 5, 5:04 PM CDT	Special Weather Statement	OHX	Coffee, Grundy	41 min
Jul 5, 5:09 PM CDT	Special Weather Statement	OHX	Wayne	51 min
Jul 5, 5:22 PM CDT	Special Weather Statement	OHX	Houston, Stewart	38 min
Jul 5, 5:41 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Stewart	24 min
Jul 5, 5:51 PM CDT	Special Weather Statement	OHX	Van Buren	39 min
Jul 5, 5:58 PM CDT	Severe Thunderstorm Warning	OHX	Grundy, Warren	32 min
Jul 5, 6:13 PM CDT	Areal Flood Advisory	OHX	Grundy, Van Buren, Warren	2 hr
Jul 5, 6:21 PM CDT	Special Weather Statement	OHX	Maury	24 min
Jul 5, 6:33 PM CDT	Special Weather Statement	OHX	Stewart	27 min
Jul 5, 6:35 PM CDT	Special Weather Statement	OHX	Van Buren, Warren	40 min
Jul 5, 6:45 PM CDT	Special Weather Statement	OHX	Maury	45 min
Jul 5, 6:56 PM CDT	Special Weather Statement	OHX	Stewart	34 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.