Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 310, NWS Morristown, TN

August 4, 2003Scott County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 4, 2003, 5:35 PM EDT for Scott County, Tennessee. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2003, 5:35 PM EDT (21:35 UTC)
Expired: Aug 4, 2003, 6:30 PM EDT
In force: 55 min
Issued by: NWS Morristown, TN
Area: Counties, with a storm outline in the text

County Scott County, TN

The radar

The Knoxville radar (KMRX), 102 km from the middle of the area, began a volume at 21:36 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.6 hours before the alert went out and 191 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: 373 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

995 
WUUS54 KMRX 042135
SVRMRX
TNC151-042230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
534 PM EDT MON AUG 4 2003

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SCOTT COUNTY IN EAST TENNESSEE

* UNTIL 630 PM EDT

* AT 531 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR NORMA...OR 13 MILES WEST OF LA FOLLETTE...
  MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND
  BREAK TREE LIMBS ABOUT THE SIZE OF YOUR WRIST.
  HAIL UP TO 1 INCH IN DIAMETER...OR THE SIZE OF QUARTERS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.
  FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING.

SEEK A STURDY SHELTER IMMEDIATELY

LAT...LON 3651 8464 3624 8450 3631 8433 3655 8439

$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 5:27 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Sevier	48 min
Aug 4, 5:38 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	37 min
Aug 4, 5:49 PM EDT	Severe Thunderstorm Warning	MRX	Campbell	41 min
Aug 4, 6:10 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	50 min
Aug 4, 6:14 PM EDT	Severe Thunderstorm Warning	MRX	Roane	46 min
Aug 4, 6:27 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Meigs, Rhea	63 min
Aug 4, 6:31 PM EDT	Severe Thunderstorm Warning	MRX	Greene	44 min
Aug 4, 6:33 PM EDT	Severe Thunderstorm Warning	MRX	Anderson	42 min
Aug 4, 6:39 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Loudon	66 min
Aug 4, 7:11 PM EDT	Severe Thunderstorm Warning	MRX	Anderson	49 min
Aug 4, 7:13 PM EDT	Severe Thunderstorm Warning	MRX	Greene	47 min
Aug 4, 7:47 PM EDT	Severe Thunderstorm Warning	MRX	Knox	28 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2003 Every severe thunderstorm warning in 2003

Sources

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