Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 18, NWS Nashville, TN

April 13, 20194 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 13, 2019, 8:41 PM CDT for 4 counties in Tennessee. It was in force for 34 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: Apr 13, 2019, 8:41 PM CDT (01:41 UTC)
Expired: Apr 13, 2019, 9:15 PM CDT
In force: 34 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Giles County, TN, Lawrence County, TN, Lewis County, TN, Maury County, TN

The radar

The Nashville radar (KOHX), 112 km from the middle of the area, began a volume at 01:45 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
Apr 13, 8:45 PM CDT	HAIL 1	5 W Lawrenceburg, TN

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 one storm report to this severe thunderstorm warning; the first came 4 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 00:00Z, 1.7 hours before the alert went out and 100 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1309 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

422 
WUUS54 KOHX 140141
SVROHX
TNC055-099-101-119-140215-
/O.NEW.KOHX.SV.W.0018.190414T0141Z-190414T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
841 PM CDT Sat Apr 13 2019

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Eastern Lewis County in Middle Tennessee...
  Southwestern Maury County in Middle Tennessee...
  Northeastern Lawrence County in Middle Tennessee...
  Northwestern Giles County in Middle Tennessee...

* Until 915 PM CDT.

* At 841 PM CDT, a severe thunderstorm was located just west of 
  Lawrenceburg, moving north at 45 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Emergency management. At 838 pm...trees were reported 
           down in Loretto with this storm.

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

* Locations impacted include...
  Lawrenceburg, Mount Pleasant, Summertown, Ethridge, Gordonsburg,
  Henryville, Leoma and Hampshire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3516 8750 3562 8742 3566 8734 3566 8732
      3567 8732 3565 8711 3513 8729
TIME...MOT...LOC 0141Z 191DEG 39KT 3523 8738 

HAIL...0.75IN
WIND...60MPH
 
$$

Shamburger

2 follow-up statements

839 
WWUS54 KOHX 140153
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
853 PM CDT Sat Apr 13 2019

TNC055-140203-
/O.CAN.KOHX.SV.W.0018.000000T0000Z-190414T0215Z/
Giles TN-
853 PM CDT Sat Apr 13 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GILES COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3562 8742 3566 8734 3566 8732 3567 8732
      3565 8711 3528 8730 3530 8748
TIME...MOT...LOC 0153Z 183DEG 38KT 3536 8737 

$$

TNC099-101-119-140215-
/O.CON.KOHX.SV.W.0018.000000T0000Z-190414T0215Z/
Lewis TN-Maury TN-Lawrence TN-
853 PM CDT Sat Apr 13 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EASTERN LEWIS...SOUTHWESTERN MAURY AND NORTHEASTERN LAWRENCE
COUNTIES...

At 853 PM CDT, a severe thunderstorm was located just south of 
Summertown, or 7 miles north of Lawrenceburg, moving north at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Emergency management. At 845 pm...quarter size hail was 
         reported west of Lawrenceburg with this storm.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Mount Pleasant, Summertown, Ethridge, Gordonsburg, Henryville and
Hampshire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3562 8742 3566 8734 3566 8732 3567 8732
      3565 8711 3528 8730 3530 8748
TIME...MOT...LOC 0153Z 183DEG 38KT 3536 8737 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Shamburger

600 
WWUS54 KOHX 140208
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
908 PM CDT Sat Apr 13 2019

TNC099-140218-
/O.CAN.KOHX.SV.W.0018.000000T0000Z-190414T0215Z/
Lawrence TN-
908 PM CDT Sat Apr 13 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LAWRENCE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3562 8742 3566 8734 3566 8732 3567 8732
      3565 8711 3545 8722 3549 8744
TIME...MOT...LOC 0208Z 191DEG 39KT 3552 8733 

$$

TNC101-119-140215-
/O.CON.KOHX.SV.W.0018.000000T0000Z-190414T0215Z/
Lewis TN-Maury TN-
908 PM CDT Sat Apr 13 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHEASTERN LEWIS AND SOUTHWESTERN MAURY COUNTIES...

At 908 PM CDT, a severe thunderstorm was located near Summertown, or
12 miles east of Hohenwald, moving north at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Mount Pleasant, Gordonsburg and Hampshire. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3562 8742 3566 8734 3566 8732 3567 8732
      3565 8711 3545 8722 3549 8744
TIME...MOT...LOC 0208Z 191DEG 39KT 3552 8733 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

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 Apr 13, 7:23 PM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, Apr 13, 7:23 PM CDT, 1 hour 18 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
723 PM CDT Sat Apr 13 2019

.UPDATE...
FOR EVENING DISCUSSION.

&&

.DISCUSSION...

Sfc low approaching the Arklatex this evening. Low level
confluence is quite strong over western TN. This adds credence to
ene movement of the sfc low overnight. This feature should reach
central KY around 12z. The system will stack nicely with enhanced
zones of pva and therefore the low will maintain strength and
possibly strengthen. Quite a bit of elevated instability well
north of the low. Waa is quite considerable east and southeast of
the low.

For the forecast, wx and pop grids appear to be on track. I gave a
little hourly teak earlier and sped up the likely pops across the
west. Otw, no concrete changes to pops. Temps are a little tricky.
We may see a brief 2-3 degree cool down as the airmass saturates.
But, look for that stronger waa to win out later tonight. Will
make a few hourly tweaks and attempt to interpolate sfc temps
through 12z.

As of the severe weather timing, it still looks like midnight or
1am far west, 2am - 4am central zones, 5 am - 9 am Plateau. It
appears that another line of strong to severe may develop just at
or perhaps just after sunrise to the west of the Plateau.

As for zone updates, may update a little later if min temps or
overall pop amounts change for the overnight.

&&

.AVIATION...
00Z TAF DISCUSSION.

Numerous -SHRA and -TSRA will affect airports this TAF period
with initial VFR conditions becoming MVFR/IFR after 06-07Z at
CKV/BNA/MQY and after 11Z at CSV. Northeast to east winds this
evening will veer to southeast and south overnight and increase
significantly with gusts over 30 knots at times. Precip will end
at most airports for a few hours Sunday morning before another
round of -SHRA/-TSRA arrives later on.

&&

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

&&

DISCUSSION......21
AVIATION........Shamburger

Hazardous weather outlook, Apr 13, 4:35 AM CDT, 16 hours 6 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
435 AM CDT Sat Apr 13 2019

TNZ005>011-023>034-056>066-075-077>080-093>095-141100-
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-
435 AM CDT Sat Apr 13 2019

This Hazardous Weather Outlook is for portions of middle
Tennessee.

.DAY ONE...Today and Tonight

Showers and thunderstorms will increase in coverage and intensity
across Middle Tennessee tonight with some severe thunderstorms
expected late in the night. Damaging winds will be the most
widespread hazard, but a few tornadoes and some large hail may
occur as well.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Severe thunderstorms will be possible Sunday. Damaging winds
will be the most common hazard. A few tornadoes and some large
hail could occur. The severe storm threat will cover all of Middle
Tennessee in the morning, then the threat will be located east of
I-65 in the afternoon.

Looking ahead, strong thunderstorms with gusty winds and heavy
downpours will be possible Thursday and Thursday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely at times late tonight through Sunday.

13

In the hours before

Special weather statement, Apr 13, 8:24 PM CDT, 17 minutes before

Special Weather Statement
National Weather Service Nashville TN
824 PM CDT Sat Apr 13 2019

TNZ094-140200-
Lawrence TN-
824 PM CDT Sat Apr 13 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAWRENCE COUNTY UNTIL 900
PM CDT...

At 823 PM CDT, Doppler radar was tracking a strong thunderstorm near
Loretto, or 14 miles south of Lawrenceburg, moving north at 50 mph.

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

Locations impacted include...
Lawrenceburg, Loretto, St. Joseph, Ethridge and Leoma.

LAT...LON 3501 8751 3539 8748 3537 8722 3500 8732
TIME...MOT...LOC 0123Z 193DEG 43KT 3505 8742

Shamburger

Special weather statement, Apr 13, 8:29 PM CDT, 12 minutes before

Special Weather Statement
National Weather Service Nashville TN
829 PM CDT Sat Apr 13 2019

TNZ094-095-140215-
Lawrence TN-Giles TN-
829 PM CDT Sat Apr 13 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LAWRENCE AND GILES
COUNTIES UNTIL 915 PM CDT...

At 829 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Rogersville, Alabama or 11 miles west of Athens,
Alabama, moving north at 45 mph.

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

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

This includes Interstate 65 between mile markers 15 and 21.

LAT...LON 3500 8726 3532 8720 3529 8684 3499 8696
TIME...MOT...LOC 0129Z 195DEG 39KT 3482 8717

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:24 PM CDT	Special Weather Statement	OHX	Lawrence	36 min
Apr 13, 8:29 PM CDT	Special Weather Statement	OHX	Giles	46 min
Apr 13, 8:44 PM CDT	Severe Thunderstorm Warning	OHX	Giles	46 min
Apr 13, 9:14 PM CDT	Special Weather Statement	OHX	Hickman	31 min
Apr 13, 9:15 PM CDT	Special Weather Statement	OHX	Maury	45 min
Apr 13, 9:23 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Maury, Williamson	37 min
Apr 13, 9:59 PM CDT	Special Weather Statement	OHX	Cheatham	31 min
Apr 13, 10:28 PM CDT	Special Weather Statement	OHX	Marshall	32 min
Apr 14, 2:22 AM CDT	Wind Advisory	OHX	Bedford, Cannon, Clay, Coffee, Cumberland, Davidson and 18 more	17 hr
Apr 14, 2:23 AM CDT	Special Weather Statement	OHX	Giles	37 min
Apr 14, 2:47 AM CDT	Tornado Warning	OHX	Giles	15 min
Apr 14, 3:21 AM CDT	Special Weather Statement	OHX	Bedford, Marshall	39 min
Apr 14, 4:18 AM CDT	Special Weather Statement	OHX	Rutherford	27 min
Apr 14, 5:21 AM CDT	Special Weather Statement	OHX	Cannon, DeKalb	39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.