Alert archive / Tennessee / Tornado Warnings in 2000

Tornado Warning 69, NWS Nashville, TN

July 20, 2000Marshall County, Tennessee

NWS Nashville, TN issued this tornado warning at Jul 20, 2000, 4:57 PM CDT for Marshall County, Tennessee. It was in force for 18 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 20, 2000, 4:57 PM CDT (21:57 UTC)
Expired: Jul 20, 2000, 5:15 PM CDT
In force: 18 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Marshall County, TN

The radar

The Northeast Alabama radar (KHTX), 86 km from the middle of the area, began a volume at 21:58 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 20, 5:25 PM CDT	Thunderstorm Wind 61 E	South Portion, TN	SKYWARN Spotter reported trees down in the southern part of the county.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 20, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.0 hours before the alert went out and 75 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: 11 J/kg
Mixed-layer CIN: -438 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KOHX 202159
TORBNA
TNC117-202215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
457 PM CDT THU JUL 20 2000

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MARSHALL COUNTY IN TENNESSEE
  THIS INCLUDES THE CITY OF LEWISBURG

* UNTIL 515 PM CDT

* AT 452 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
TORNADO 12 MILES SOUTHWEST OF LEWISBURG MOVING EAST AT 45 MPH. THIS 
STORM IS MOVING JUST OF THE CORNERSVILLE AREA AND ALONG HIGHWAY 
272.  

* THE TORNADO IS EXPECTED TO BE NEAR...
  2 MILES SOUTH OF CORNERSVILLE BY 505 PM CDT

IF YOU LIVE IN SOUTEHRN MARSHALL COUNTY SEEK SHELTER NOW!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT 
THURSDAY EVENING FOR TENNESSEE. 
$$
JDG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 2:52 PM CDT	Severe Thunderstorm Warning	OHX	Benton	38 min
Jul 20, 3:09 PM CDT	Severe Thunderstorm Warning	OHX	Humphreys, Perry, Wayne	51 min
Jul 20, 3:48 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis	42 min
Jul 20, 3:57 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	48 min
Jul 20, 4:13 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Maury	47 min
Jul 20, 4:26 PM CDT	Severe Thunderstorm Warning	OHX	Lincoln, Marshall	54 min
Jul 20, 5:12 PM CDT	Severe Thunderstorm Warning	OHX	Lincoln, Moore	48 min
Jul 20, 5:12 PM CDT	Severe Thunderstorm Warning	OHX	Marshall	48 min
Jul 20, 5:24 PM CDT	Severe Thunderstorm Warning	OHX	Franklin	51 min

Nearby

Tornado Warnings in Tennessee, 2000 Every tornado warning in 2000 Tornadoes in 2000

Sources

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