Alert archive / Tennessee / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 139, NWS Nashville, TN

June 30, 2002Giles County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 30, 2002, 6:03 PM CDT for Giles County, Tennessee. It was in force for 27 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: Jun 30, 2002, 6:03 PM CDT (23:03 UTC)
Expired: Jun 30, 2002, 6:30 PM CDT
In force: 27 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Giles County, TN

What was reported inside it

Time	Report	Where	Remark
Jun 30, 6:05 PM CDT	Thunderstorm Wind 50 E	Pulaski, TN	Spotter reported trees were blown down.

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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.1 hours before the alert went out and 110 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: 1640 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: -4 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 
WUUS54 KOHX 302303
SVRBNA
TNC055-302330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
601 PM CDT SUN JUN 30 2002

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GILES COUNTY IN TENNESSEE

* UNTIL 630 PM CDT

* AT 553 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHEAST OF LYNNVILLE MOVING SOUTHWEST 
  AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LYNNVILLE AROUND 605 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING.

$$

JLM

LAT...LON 3541 8681 3551 8699 3521 8726 3509 8702

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 Jun 30, 12:05 PM CDT, 5 hours 58 minutes earlier.

Area forecast discussion, Jun 30, 12:05 PM CDT, 5 hours 58 minutes before

AREA FORECAST DISCUSSION...CORRECTED TIME
NATIONAL WEATHER SERVICE NASHVILLE TN
1205 PM CDT SUN JUN 30 2002

TSTM ACTIVITY FIRING IN A NARROW BAND ALONG THE TN RIVER. SURFACE
ANALYSIS SUPPORTS THAT A WEAK SURFACE TROUGH ACROSS THIS AREA.
ELSEWHERE...ISOLATED SHOWERS ARE DEVELOPING ACROSS SOUTHERN PORTIONS
OF MIDDLE TN EASTWARD ACROSS THE SOUTHERN PLATEAU. CONVECTION FIRING
JUST NORTH OF CHATTANOOGA SUPPORTS WEAK VORT CENTER WHICH THE MODELS
ARE ADVERTISING. WITH A WEAK EASTERLY FLOW ALOFT AT 500 MB...WEAK
PVA APPEARS TO BE APPARENT ACROSS THE MID STATE.

WITH ADDITIONAL HEATING ON THE WAY...WILL UPDATE FORECAST AND UP
POPS...PARTICULARLY ACROSS THE FAR WEST WHERE AN ADDITIONAL ZONE
GROUP IS NEEDED.

TEMPS STILL LOOK ON TRACK.

.BNA...NONE.

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 5:32 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	43 min
Jun 30, 6:31 PM CDT	Severe Thunderstorm Warning	OHX	Giles	29 min
Jun 30, 6:41 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	49 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2002 Every severe thunderstorm warning in 2002

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.