Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 481, NWS Nashville, TN

November 18, 2003Cannon County, DeKalb County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Nov 18, 2003, 2:33 PM CST for Cannon County, DeKalb County, Tennessee. It was in force for 57 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: Nov 18, 2003, 2:33 PM CST (20:33 UTC)
Expired: Nov 18, 2003, 3:30 PM CST
In force: 57 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

Counties Cannon County, TN, DeKalb County, TN

The radar

The Nashville radar (KOHX), 65 km from the middle of the area, began a volume at 20:34 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Nov 18, 1:55 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.6 hours before the alert went out and 62 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 325 m²/s²
0-3 km storm-relative helicity: 386 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 182033
SVRBNA
TNC015-041-182130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
232 PM CST TUE NOV 18 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CANNON COUNTY IN TENNESSEE
  DE KALB COUNTY IN TENNESSEE

* UNTIL 330 PM CST

* AT 228 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR AUBURNTOWN...OR 8 MILES NORTH OF
  WOODBURY...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LIBERTY AROUND 235 PM CST
  DOWELLTOWN AROUND 240 PM CST

DAMAGING WINDS IN EXCESS OF 60 MPH ARE LIKELY WITH THIS STORM. IF 
YOU ARE IN THE PATH OF THIS STORM...MOVE INDOORS.

THE MAIN THREAT IS DAMAGING WIND. SEEK SHELTER INSIDE A STURDY BUILDING 
AND STAY AWAY FROM OUTSIDE WALLS AND WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CST TUESDAY EVENING
FOR TENNESSEE.

LAT...LON 3591 8614 3573 8606 3591 8568 3611 8581

$$
BOYD

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 Nov 18, 2:30 PM CST, 3 minutes earlier.

Area forecast discussion, Nov 18, 2:30 PM CST, 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
230 PM CST TUE NOV 18 2003

.SHORT TERM...
JUST ISSUED A NEW TORNADO WATCH FOR EASTERN PORTIONS. A FEW REPORTS
OF SEVERE. SOME HEAVY RAIN HAS BEEN OCCURING WITH SQUALL LINE.

.LONG TERM...
SQUALL LINE WILL MOVE OUT OF CWA EARLY THIS EVE...THEN COLD FRONT
EXPECTED TO COME ACROSS LATE TONIGHT. SHRA/ ISOLATED TSRA EXPECTED
TO CONTINUE TONITE IN ADVANCE OF FRONT...AND THEN SOME LAGGING SHRA
INTO TOMORROW...ESPECIALLY E...ASSOCIATED W/ UPPER LOW/COLD POOL.
CLEARING SLOWLY FROM W TOMORROW AS HI PRES TAKES HOLD INTO THU.

WILL KEEP FLOOD WATCH FOR PLATEAU TONITE AS MODELS SHOW FOCUS OF
HEAVY RAIN THIS AREA AS FRONT SLOWS DOWN AND SURFACE WAVE FORMS
ALONG IT.

AS FOR TEMPS...GUID FOLLOWED CLOSELY.

BNA BU 54/61/40/66  +300
CKV BU 53/59/39/65  +300
CSV WU 54/56/35/60  +600
&&

.BNA WATCHES/WARNING/ADVISORIES...
FLOOD WATCH PLATEAU TONIGHT.
&&

MAG

Hazardous weather outlook, Nov 18, 5:30 AM CST, 9 hours 3 minutes before

TNZ005>011-022>034-056>066-075-077>080-093>095-191130-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CST TUE NOV 18 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT.
MOIST SOUTH WINDS AND LOW LEVEL WIND SHEAR ARE SUFFICIENT FOR
STRONG TO SEVERE THUNDERSTORMS. A FEW STORMS COULD DEVELOP ROTATION.
THESE STORMS WILL BE CAPABLE OF DAMAGING STRAIGHT-LINE WINDS AND
POSSIBLY A FEW TORNADOES. HEAVY RAINFALL IS ALSO POSSIBLE WITH THIS
SYSTEM...WITH THE BEST CHANCE IN SOUTH MIDDLE TENNESSEE AND THE
CUMBERLAND PLATEAU TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

ANOTHER COLD FRONT LOOKS TO MOVE INTO MIDDLE TENNESSEE ON MONDAY.
THERE WILL BE A CHANCE OF THUNDERSTORMS BUT MOISTURE APPEARS LIMITED
WITH THIS SYSTEM. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

04

In the hours before

Local storm report, Nov 18, 1:54 PM CST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
154 PM CST TUE NOV 18 2003

TIME(CST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0100 PM    3 E CAMDEN                TN   FLOOD
11/18/03   BENTON                         EMA REPORTED
                                          BIVERS-CYPRESS CREEK ROAD
                                          WAS CLOSED DUE TO HIGH
                                          WATER OVER THE ROAD.

JAO

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 18, 9:13 AM CST	Severe Thunderstorm Warning	OHX	Benton	62 min
Nov 18, 9:26 AM CST	Severe Thunderstorm Warning	OHX	Stewart	64 min
Nov 18, 10:11 AM CST	Flash Flood Warning	OHX	Benton	3 hr
Nov 18, 12:51 PM CST	Severe Thunderstorm Warning	OHX	Robertson	39 min
Nov 18, 1:18 PM CST	Severe Thunderstorm Warning	OHX	Davidson	57 min
Nov 18, 1:33 PM CST	Severe Thunderstorm Warning	OHX	Wilson	42 min
Nov 18, 1:53 PM CST	Severe Thunderstorm Warning	OHX	Rutherford	52 min
Nov 18, 1:59 PM CST	Severe Thunderstorm Warning	OHX	Coffee	61 min
Nov 18, 2:15 PM CST	Severe Thunderstorm Warning	OHX	Smith, Trousdale, Wilson	60 min
Nov 18, 2:24 PM CST	Severe Thunderstorm Warning	OHX	Macon	51 min
Nov 18, 3:22 PM CST	Severe Thunderstorm Warning	OHX	Cumberland	53 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.