Alert archive / Tennessee / Tornado Warnings in 2003

Tornado Warning 100, NWS Nashville, TN

July 21, 2003Sumner County, Tennessee

NWS Nashville, TN issued this tornado warning at Jul 21, 2003, 2:05 PM CDT for Sumner County, Tennessee. It was in force for 40 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: Jul 21, 2003, 2:05 PM CDT (19:05 UTC)
Expired: Jul 21, 2003, 2:45 PM CDT
In force: 40 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Sumner County, TN

The radar

The Nashville radar (KOHX), 41 km from the middle of the area, began a volume at 19:04 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 21, 11:55 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.1 hours before the alert went out and 54 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: 1467 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 117 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.

315 
WFUS54 KOHX 211905
TORBNA
TNC165-211945-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
202 PM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SUMNER COUNTY IN TENNESSEE

* UNTIL 245 PM CDT

* AT 159 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 8 MILES NORTHWEST OF PORTLAND...OR ABOUT 3 MILES SOUTHWEST
  OF FRANKLIN...MOVING SOUTHEAST AT 25 MPH.
* THE TORNADO WILL BE NEAR
  MITCHELLVILLE AT 208 PM CDT 
  PORTLAND AT 215 PM CDT
  OAKGROVE AT 225 PM CDT

DOPPLER RADAR INDICATED A TORNADO MAY FORM AT ANY TIME. TAKE COVER
NOW. ABANDON MOBILE HOMES AND VEHICLES. MOVE TO A BASEMENT...AN
INTERIOR ROOM OR HALLWAY...ON THE LOWEST FLOOR.

&&

LAT...LON 3671 8676 3658 8661 3639 8630 3668 8620

$$
BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 11:35 AM CDT	Severe Thunderstorm Warning	OHX	Benton	55 min
Jul 21, 12:11 PM CDT	Severe Thunderstorm Warning	OHX	Perry	64 min
Jul 21, 12:49 PM CDT	Severe Thunderstorm Warning	OHX	Hickman	41 min
Jul 21, 1:01 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Wayne	59 min
Jul 21, 1:29 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence	61 min
Jul 21, 1:35 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	40 min
Jul 21, 1:40 PM CDT	Severe Thunderstorm Warning	OHX	Maury	50 min
Jul 21, 2:00 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	45 min
Jul 21, 2:08 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall	67 min
Jul 21, 2:17 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	58 min
Jul 21, 2:24 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford, Wilson	51 min
Jul 21, 2:28 PM CDT	Severe Thunderstorm Warning	OHX	Smith	62 min
Jul 21, 2:42 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	48 min
Jul 21, 2:46 PM CDT	Severe Thunderstorm Warning	OHX	Cannon	74 min
Jul 21, 2:58 PM CDT	Severe Thunderstorm Warning	OHX	Lincoln	62 min
Jul 21, 3:13 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson	62 min
Jul 21, 3:26 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, DeKalb, Moore, Warren	64 min
Jul 21, 3:33 PM CDT	Severe Thunderstorm Warning	OHX	Putnam	72 min
Jul 21, 3:45 PM CDT	Severe Thunderstorm Warning	OHX	Grundy, Van Buren, White	60 min
Jul 21, 4:27 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	48 min

Nearby

Tornado Warnings in Tennessee, 2003 Every tornado warning in 2003 Tornadoes 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.