Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 9, NWS Nashville, TN

January 11, 20204 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 11, 2020, 8:53 AM CST for 4 counties in Tennessee. It was in force for 37 min. 2 reports 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, 8:53 AM CST (14:53 UTC)
Expired: Jan 11, 2020, 9:30 AM CST
In force: 37 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Davidson County, TN, Hickman County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 56 km from the middle of the area, began a volume at 14:53 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, 9:15 AM CST	TSTM WND DMG	6 Wnw Spring Hill, TN	PICTURE OF A CAR ROLLED OFF ROAD DUE TO WIND ON B. DODSON ROAD. TIME ESTIMATED VIA RADAR.
Jan 11, 9:18 AM CST	TSTM WND DMG	Leipers Fork, TN	PICTURE OF A TREE BLOCKING THE ROAD ON LEIPERS FORK. TIME ESTIMATED VIA RADAR.

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 22 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, 6:57 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 2.9 hours before the alert went out and 47 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.

196 
WUUS54 KOHX 111453
SVROHX
TNC037-081-119-187-111530-
/O.NEW.KOHX.SV.W.0009.200111T1453Z-200111T1530Z/

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

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southwestern Davidson County in Middle Tennessee...
  Northwestern Maury County in Middle Tennessee...
  Western Williamson County in Middle Tennessee...
  Southeastern Hickman County in Middle Tennessee...

* Until 930 AM CST.

* At 852 AM CST, severe thunderstorms were located along a line
  extending from 9 miles southwest of Kingston Springs to 8 miles
  northwest of Mount Pleasant, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Franklin, Forest Hills, Belle Meade, Thompson's Station, Fairview,
  Bellevue, Santa Fe, Primm Springs, Williamsport, Leipers Fork and
  Natchez Trace At Highway 96.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 PM CST for Middle
Tennessee.

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

&&

LAT...LON 3613 8680 3579 8689 3558 8734 3596 8724
      3596 8720 3597 8721 3598 8719 3601 8719
      3605 8708 3604 8704 3606 8704
TIME...MOT...LOC 1452Z 245DEG 37KT 3597 8717 3567 8725 

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

Whitehead

1 follow-up statement

614 
WWUS54 KOHX 111513
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
913 AM CST Sat Jan 11 2020

TNC081-111521-
/O.CAN.KOHX.SV.W.0009.000000T0000Z-200111T1530Z/
Hickman TN-
913 AM CST Sat Jan 11 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HICKMAN COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 100 PM CST for Middle
Tennessee.

LAT...LON 3613 8680 3579 8689 3564 8722 3590 8710
      3604 8704 3606 8704
TIME...MOT...LOC 1511Z 245DEG 37KT 3605 8695 3575 8704 

$$

TNC037-119-187-111530-
/O.CON.KOHX.SV.W.0009.000000T0000Z-200111T1530Z/
Davidson TN-Maury TN-Williamson TN-
913 AM CST Sat Jan 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM CST
FOR SOUTHWESTERN DAVIDSON...NORTH CENTRAL MAURY AND CENTRAL
WILLIAMSON COUNTIES...

At 911 AM CST, severe thunderstorms were located along a line
extending from near Bellevue to 6 miles west of Spring Hill, moving
northeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Franklin, Forest Hills, Belle Meade, Thompson's Station, Bellevue,
Santa Fe, Leipers Fork and Natchez Trace At Highway 96.

This includes the following highways...
 Interstate 40 between mile markers 195 and 197.
 Interstate 840 between mile markers 14 and 28.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 PM CST for Middle
Tennessee.

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

&&

LAT...LON 3613 8680 3579 8689 3564 8722 3590 8710
      3604 8704 3606 8704
TIME...MOT...LOC 1511Z 245DEG 37KT 3605 8695 3575 8704 

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, 6:26 AM CST, 2 hours 27 minutes earlier.

Area forecast discussion, Jan 11, 6:26 AM CST, 2 hours 27 minutes before

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

.UPDATE...
FOR MORNING 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...
12Z TAF DISCUSSION.

A strong line of thunderstorms will be moving through middle TN
today. Tried to time the onset as best I could. Expect it to be
around CKV around 12-13Z BNA/MQY around 17-18Z and CSV around
20-21Z. Even before and after the line very strong gusty winds to
25-35kts are expected today. This will mean more LLWS potential.
Expect CIGs to be MVFR today and IFR/LIFR especially in the
heavier rain.

&&

.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......JB Wright
AVIATION........12

Hazardous weather outlook, Jan 11, 5:23 AM CST, 3 hours 30 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, 7:55 AM CST, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
755 AM CST SAT JAN 11 2020

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

0715 AM     TSTM WND DMG     1 S DOVER               36.47N  87.84W
01/11/2020                   STEWART            TN   EMERGENCY MNGR

            JUST SOUTH OF DOVER...NUMEROUS TREES AND POWER LINES
            DOWN. 730 HOMES WITHOUT POWER

&&

EVENT NUMBER OHX2000001

21

Local storm report, Jan 11, 8:09 AM CST, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
809 AM CST SAT JAN 11 2020

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

0758 AM     TSTM WND DMG     CEDAR HILL              36.55N  87.00W
01/11/2020                   ROBERTSON          TN   TRAINED SPOTTER

            TREE DOWN ON ROADWAY AT JONES CHAPEL AND DRAKE ROAD

&&

EVENT NUMBER OHX2000002

21

Local storm report, Jan 11, 8:15 AM CST, 38 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NASHVILLE TN
815 AM CST SAT JAN 11 2020

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

0758 AM     NON-TSTM WND DMG CEDAR HILL              36.55N  87.00W
01/11/2020                   ROBERTSON          TN   TRAINED SPOTTER

            TREE DOWN ON ROADWAY AT JONES CHAPEL AND DRAKE ROAD

&&

CORRECTED EVENT...FATALITIES...INJURIES

EVENT NUMBER OHX2000002

21

Local storm report, Jan 11, 8:30 AM CST, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
830 AM CST SAT JAN 11 2020

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

0757 AM     TSTM WND DMG     DICKSON                 36.08N  87.38W
01/11/2020                   DICKSON            TN   TRAINED SPOTTER

            TREES ON POWER LINES ALONG HWY 48 SOUTH.

&&

EVENT NUMBER OHX2000003

21

Local storm report, Jan 11, 8:39 AM CST, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
839 AM CST SAT JAN 11 2020

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

0757 AM     TSTM WND DMG     DICKSON                 36.08N  87.38W
01/11/2020                   DICKSON            TN   PUBLIC

            CARPORT TORN APART AND BLOWN INTO FRONT YARD

&&

EVENT NUMBER OHX2000004

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, 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, 2:02 PM CST	Severe Thunderstorm Warning	OHX	Grundy, Van Buren, Warren	28 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.