Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 18, NWS Nashville, TN

January 11, 2020Grundy County, Van Buren County, Warren County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 11, 2020, 2:02 PM CST for Grundy County, Van Buren County, Warren County, Tennessee. It was in force for 28 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: Jan 11, 2020, 2:02 PM CST (20:02 UTC)
Expired: Jan 11, 2020, 2:30 PM CST
In force: 28 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Grundy County, TN, Van Buren County, TN, Warren County, TN

The radar

The Northeast Alabama radar (KHTX), 62 km from the middle of the area, began a volume at 20:01 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
Jan 11, 2:27 PM CST	TSTM WND DMG	Palmer, TN	TREES AND POWER LINES DOWN IN NORTH-CENTRAL AND EASTERN PORTIONS OF THE COUNTY.

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 25 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 11, 12:42 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.0 hours before the alert went out and 118 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: 819 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 633 m²/s²
0-3 km storm-relative helicity: 864 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

589 
WUUS54 KOHX 112002
SVROHX
TNC061-175-177-112030-
/O.NEW.KOHX.SV.W.0018.200111T2002Z-200111T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
202 PM CST Sat Jan 11 2020

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southwestern Van Buren County in Middle Tennessee...
  Southeastern Warren County in Middle Tennessee...
  Grundy County in Middle Tennessee...

* Until 230 PM CST.

* At 201 PM CST, a severe thunderstorm was located near
  Gruetli-Laager, or 18 miles east of Manchester, moving east at 60
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Gruetli-Laager, Tracy City, Altamont, Coalmont, Palmer, Beersheba
  Springs, Viola and Pelham.

This includes Interstate 24 between mile markers 129 and 135.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CST for Middle
Tennessee.

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

&&

LAT...LON 3524 8582 3522 8587 3527 8590 3534 8589
      3537 8587 3539 8589 3562 8586 3559 8540
      3555 8546 3553 8561 3549 8554 3543 8554
      3542 8551 3541 8551 3541 8549 3538 8549
      3532 8556 3529 8571 3524 8569 3522 8574
TIME...MOT...LOC 2001Z 251DEG 53KT 3539 8576 

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

Whitehead

1 follow-up statement

337 
WWUS54 KOHX 112016
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
216 PM CST Sat Jan 11 2020

TNC061-175-177-112030-
/O.CON.KOHX.SV.W.0018.000000T0000Z-200111T2030Z/
Van Buren TN-Warren TN-Grundy TN-
216 PM CST Sat Jan 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CST
FOR SOUTHWESTERN VAN BUREN...SOUTHEASTERN WARREN AND CENTRAL GRUNDY
COUNTIES...

At 216 PM CST, a severe thunderstorm was located 8 miles northwest of
Dunlap, moving east at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Gruetli-Laager, Tracy City, Altamont, Coalmont, Palmer and Beersheba
Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM CST for Middle
Tennessee.

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

&&

LAT...LON 3524 8582 3561 8564 3559 8540 3555 8546
      3553 8561 3549 8554 3543 8554 3542 8551
      3541 8551 3541 8549 3538 8549 3532 8556
      3529 8571 3524 8569 3522 8574
TIME...MOT...LOC 2016Z 251DEG 53KT 3546 8549 

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

Whitehead

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 Jan 11, 11:18 AM CST, 2 hours 44 minutes earlier.

Area forecast discussion, Jan 11, 11:18 AM CST, 2 hours 44 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
1118 AM CST Sat Jan 11 2020

.UPDATE...
FOR 18Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Updated suite of forecast products to remove early this morning
wording from zone forecast product. Tweaked hourly temperature,
dewpoint, and wind speed/direction grids. Remainder of forecast
continues to be in good shape.

&&

.AVIATION...
18Z TAF DISCUSSION.

Broken line of convection continues to move across the mid state.
Currently it is located between CSV and BNA. Looks as though the
line of strong to potentially severe storms will move through the
CSV area around 20Z. Otw, wind speeds behind the line have
dropped off markedly. Will therefore lower those speeds for the
BNA MQY and CKV tafs. Moving on, low cloudiness to hang on through
the period. A brief period of vcsh will be included generally
just prior to 00z before precip ends.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 6 PM CST this evening for Bedford-Cannon-
Cheatham-Clay-Coffee-Cumberland-Davidson-De Kalb-Dickson-
Fentress-Giles-Grundy-Hickman-Houston-Humphreys-Jackson-Lawrence-
Lewis-Macon-Marshall-Maury-Montgomery-Overton-Perry-Pickett-
Putnam-Robertson-Rutherford-Smith-Stewart-Sumner-Trousdale-Van
Buren-Warren-Wayne-White-Williamson-Wilson.

&&

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

Hazardous weather outlook, Jan 11, 5:23 AM CST, 8 hours 39 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
523 AM CST Sat Jan 11 2020

TNZ005>011-023>034-056>066-075-077>080-093>095-121100-
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-
523 AM CST Sat Jan 11 2020

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

A wind advisory will continue to be in effect for all of Middle
Tennessee through the afternoon hours today. Gust to around
45 mph will be possible.

Some strong to a few severe thunderstorms will be possible
this morning through the afternoon hours. Main concerns will be
strong to damaging winds and possibly isolated tornadoes mainly
south of I-40.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed today.

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

JB Wright

In the hours before

Local storm report, Jan 11, 12:45 PM CST, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1245 PM CST SAT JAN 11 2020

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

0745 AM     TSTM WND DMG     8 WSW CENTERVILLE       35.76N  87.58W
01/11/2020                   HICKMAN            TN   911 CALL CENTER

            SCATTERED TREE DAMAGE ACROSS THE COUNTY

&&

EVENT NUMBER OHX2000016

SCHAPER

Local storm report, Jan 11, 12:54 PM CST, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1254 PM CST SAT JAN 11 2020

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

1129 AM     TSTM WND DMG     6 NNW LIVINGSTON        36.47N  85.37W
01/11/2020                   OVERTON            TN   SOCIAL MEDIA

            TREE DOWN ACROSS S HWY 52 NORTH OF ALLONS. TREE WAS
            CLEARED FROM ROAD.

&&

EVENT NUMBER OHX2000017

SCHAPER

Local storm report, Jan 11, 12:59 PM CST, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1259 PM CST SAT JAN 11 2020

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

0824 AM     TSTM WND DMG     HOHENWALD               35.55N  87.56W
01/11/2020                   LEWIS              TN   911 CALL CENTER

            TREES DOWN ACROSS THE COUNTY

&&

EVENT NUMBER OHX2000018

SCHAPER

Special weather statement, Jan 11, 1:05 PM CST, 57 minutes before

Special Weather Statement
National Weather Service Nashville TN
105 PM CST Sat Jan 11 2020

TNZ063>065-078-111930-
Cannon TN-De Kalb TN-Warren TN-White TN-
105 PM CST Sat Jan 11 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DE KALB...NORTHERN
WARREN...SOUTHWESTERN WHITE AND EASTERN CANNON COUNTIES UNTIL 130 PM
CST...

At 105 PM CST, Doppler radar was tracking a strong thunderstorm near
Woodbury, moving east at 45 mph.

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

Locations impacted include...
Smithville, Centertown and Rock Island State Park.

A Tornado Watch remains in effect until 300 PM CST for Middle
Tennessee. A Tornado Watch also remains in effect until 800 PM CST
for Middle Tennessee.

LAT...LON 3579 8560 3578 8561 3578 8560 3577 8561
      3577 8560 3576 8561 3576 8560 3575 8559
      3575 8560 3569 8601 3592 8603 3604 8567
TIME...MOT...LOC 1905Z 251DEG 41KT 3574 8601

Whitehead

Special weather statement, Jan 11, 1:11 PM CST, 51 minutes before

Special Weather Statement
National Weather Service Nashville TN
111 PM CST Sat Jan 11 2020

TNZ030>032-064-111945-
Putnam TN-De Kalb TN-Jackson TN-Smith TN-
111 PM CST Sat Jan 11 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SMITH...NORTHEASTERN
DE KALB...SOUTHERN JACKSON AND WESTERN PUTNAM COUNTIES UNTIL 145 PM
CST...

At 111 PM CST, Doppler radar was tracking a strong thunderstorm 8
miles north of Smithville, moving east at 40 mph.

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

Locations impacted include...
Cookeville, Smithville, Baxter, Gordonsville, Center Hill Lake,
Burgess Falls State Park, Edgar Evans State Park and Cummins Falls
State Park.

A Tornado Watch remains in effect until 300 PM CST for Middle
Tennessee. A Tornado Watch also remains in effect until 800 PM CST
for Middle Tennessee.

LAT...LON 3608 8554 3606 8558 3604 8558 3605 8561
      3602 8564 3601 8564 3592 8591 3621 8594
      3635 8554
TIME...MOT...LOC 1911Z 254DEG 37KT 3607 8587

Whitehead

Local storm report, Jan 11, 1:24 PM CST, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
124 PM CST SAT JAN 11 2020

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

0800 AM     TSTM WND DMG     5 SW DICKSON            36.03N  87.44W
01/11/2020                   DICKSON            TN   TRAINED SPOTTER

            TREES DOWN

&&

EVENT NUMBER OHX2000019

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 11, 6:54 AM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery, Stewart	51 min
Jan 11, 7:09 AM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys, Lewis, Perry, Wayne	36 min
Jan 11, 7:29 AM CST	Tornado Warning	OHX	Humphreys	15 min
Jan 11, 7:37 AM CST	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	38 min
Jan 11, 7:40 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson and 1 more	50 min
Jan 11, 7:42 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Humphreys, Lewis, Perry and 2 more	48 min
Jan 11, 8:06 AM CST	Severe Thunderstorm Warning	OHX	Hickman, Lawrence, Lewis, Maury, Perry, Wayne	39 min
Jan 11, 8:25 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson, Sumner, Williamson	22 min
Jan 11, 8:42 AM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury	33 min
Jan 11, 8:53 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Hickman, Maury, Williamson	37 min
Jan 11, 9:07 AM CST	Flash Flood Warning	OHX	Lawrence	3 hr
Jan 11, 9:11 AM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Marshall, Maury, Williamson	34 min
Jan 11, 9:22 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	38 min
Jan 11, 9:29 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	31 min
Jan 11, 9:43 AM CST	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury, Rutherford, Williamson	32 min
Jan 11, 9:55 AM CST	Special Weather Statement	OHX	Macon	35 min
Jan 11, 10:08 AM CST	Special Weather Statement	OHX	Trousdale	37 min
Jan 11, 10:15 AM CST	Special Weather Statement	OHX	Wilson	30 min
Jan 11, 10:20 AM CST	Severe Thunderstorm Warning	OHX	Smith, Wilson	25 min
Jan 11, 10:38 AM CST	Special Weather Statement	OHX	Jackson, Smith	37 min
Jan 11, 10:43 AM CST	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Wilson	32 min
Jan 11, 10:47 AM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith	28 min
Jan 11, 11:11 AM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	34 min
Jan 11, 11:35 AM CST	Special Weather Statement	OHX	Pickett	25 min
Jan 11, 12:02 PM CST	Areal Flood Advisory	OHX	Bedford, Giles, Lawrence, Lewis, Marshall, Maury and 1 more	5 hr
Jan 11, 1:05 PM CST	Special Weather Statement	OHX	DeKalb	25 min
Jan 11, 1:11 PM CST	Special Weather Statement	OHX	DeKalb	34 min
Jan 11, 2:10 PM CST	Special Weather Statement	OHX	Fentress, Pickett	50 min
Jan 11, 3:16 PM CST	Special Weather Statement	OHX	Cumberland	29 min
Jan 11, 3:32 PM CST	Severe Thunderstorm Warning	OHX	Cumberland	18 min
Jan 11, 4:09 PM CST	River Flood Advisory	OHX	Lawrence	9 hr
Jan 11, 4:21 PM CST	River Flood Advisory	OHX	Davidson	4 hr
Jan 11, 4:32 PM CST	River Flood Advisory	OHX	Giles	35 hr
Jan 11, 4:37 PM CST	River Flood Advisory	OHX	Hickman	12 hr
Jan 11, 4:40 PM CST	River Flood Advisory	OHX	Cheatham	7 hr
Jan 11, 4:43 PM CST	River Flood Advisory	OHX	Montgomery, Robertson	27 hr
Jan 11, 5:19 PM CST	Special Weather Statement	OHX	Cheatham, Robertson, Sumner	41 min
Jan 11, 5:36 PM CST	Special Weather Statement	OHX	Williamson, Wilson	39 min
Jan 11, 5:43 PM CST	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2020 Every severe thunderstorm warning in 2020

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.