Alert archive / Tennessee / Tornado Warnings in 2000

Tornado Warning 1, NWS Morristown, TN

April 20, 2000Sequatchie County, Tennessee

NWS Morristown, TN issued this tornado warning at Apr 20, 2000, 8:44 PM CDT for Sequatchie County, Tennessee. It was in force for 46 min. 2 reports 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: Apr 20, 2000, 8:44 PM CDT (01:44 UTC)
Expired: Apr 20, 2000, 9:30 PM CDT
In force: 46 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Sequatchie County, TN

What was reported inside it

Time	Report	Where	Remark
Apr 20, 9:25 PM CDT	Thunderstorm Wind	Dunlap, TN
Apr 20, 9:25 PM CDT	Hail 1	Lone Oak, TN

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
Apr 20, 5:15 PM CDT	Tornado Watch	SPC	4 hr
Apr 20, 8:35 PM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.7 hours before the alert went out and 137 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: 1081 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

148 
WFUS54 KMRX 210145
TORMRX
TNC153-210230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
844 PM CDT THU APR 20 2000

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  SEQUATCHIE COUNTY IN EASTERN TENNESSEE

* UNTIL 930 PM CDT

* AT 844 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A DEVELOPING TORNADO 7 MILES SOUTHWEST OF
  CAGLE...OR 8 MILES WEST OF DUNLAP...MOVING EAST AT 40 MPH.

THIS DANGEROUS STORM IS ALSO CAPABLE OF PRODUCING WINDS UP TO 90
MPH...AND GOLFBALL SIZE HAIL OR LARGER.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

$$

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 8:08 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Sequatchie	62 min
Apr 20, 8:12 PM CDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	28 min
Apr 20, 8:36 PM CDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	44 min
Apr 20, 8:45 PM CDT	Tornado Warning	MRX	Campbell, Scott	30 min
Apr 20, 8:48 PM CDT	Severe Thunderstorm Warning	MRX	Marion	62 min
Apr 20, 9:01 PM CDT	Severe Thunderstorm Warning	MRX	Hamilton, Meigs, Rhea	59 min
Apr 20, 9:12 PM CDT	Tornado Warning	MRX	Claiborne	48 min
Apr 20, 9:51 PM CDT	Severe Thunderstorm Warning	MRX	Bradley	59 min
Apr 20, 10:44 PM CDT	Severe Thunderstorm Warning	MRX	Monroe	61 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.