Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 264, NWS Nashville, TN

November 24, 2001Cheatham County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Nov 24, 2001, 11:40 AM CST for Cheatham County, Tennessee. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 24, 2001, 11:40 AM CST (17:40 UTC)
Expired: Nov 24, 2001, 12:15 PM CST
In force: 35 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Cheatham County, TN

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 24, 11:00 AM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 5.7 hours before the alert went out and 46 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: 6 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 378 m²/s²
0-3 km storm-relative helicity: 383 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.

334 
WUUS54 KOHX 241742
SVRBNA
TNC021-241815-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1140 AM CST SAT NOV 24 2001

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 1215 PM CST

* AT 1140 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTH OF KINGSTON SPRINGS...MOVING
  NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ASHLAND CITY AROUND 1145 AM CST

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...AND DEADLY LIGHTNING.
$$
JBW
LAT...LON 3620 8726 3607 8711 3635 8691 3639 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 Nov 24, 10:05 AM CST, 1 hour 35 minutes earlier.

Area forecast discussion, Nov 24, 10:05 AM CST, 1 hour 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1005 AM CST SAT NOV 24 2001

WELL...MORNING SOUNDING DENOTES PLENTY OF KINEMATICS...BUT NOT
MUCH THERMODYNAMICS...YET. THE SWEAT INDEX CAME IN AT 355...0-3 KM
SRH OF 600 M2/S2...AND THE 0-6 STORM MOTION IS 34 KTS AND 30
DEGREES RIGHT OF THE AVERAGE WIND. THE K INDEX IS 34...BUT THE
LIFTED INDEX IS 0....AND NO CAPE TO SPEAK OF.

LATEST RUC AND MSAS LOOP HAS 1000-850 THETA E RIDGE WITH LEADING
LINE OF SHRA/TSRA. CELL IN MONTGOMERY COUNTY BOWED OUT AND SHOWED
50 KTS AT 4000 FT...AND RADAR OPERATOR ISSUED A SVRBNA.

MAIN LOW IS WRAPPED TIGHT OVER THE MO/NE BORDER...WITH AN ATTACHED
COLD FRONT FROM LIT INTO ERN TX. FOR THE MOMENT...PRE-FRONTAL
SQUALL LINE CONTINUES TO RACE ALONG ERN MS & WRN AL...WITH ADDITIONAL
CONVECTION DEVELOPING IN THE WARM SECTOR EAST OF THE SQUALL LINE. THE
PRIMARY THREATS WILL BE WIND DAMAGE FOR OUR CWA...BUT ISOLATED IN
NATURE.  IN ALABAMA...THE THREAT IS TORNADIC IN NATURE...AND THERE
THREAT IS MUCH GREATER.

LATER THIS AFTERNOON...AS THE FRONT MOVES THROUGH...THE INSTABILITY
WILL INCREASE...AND THE THREAT FOR SEVERE WEATHER INCREASES...
MAINLY FROM 20Z-02Z.

FOR THE MEANTIME...PRESSURE GRADIENT...THE MAIN STORY WITH MOST
OBSERVATIONS IN THE 20 TO 30 KT AND GUSTY RANGE. ILL UPDATE THE
ZONES TO ADDRESS WIND ISSUES.

.BNA...TORNADO WATCH FOR COUNTIES ALONG AND WEST OF I-65 TIL 11 AM

JDG

In the hours before

Local storm report, Nov 24, 10:40 AM CST, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
1040 AM CST SAT NOV 24 2001

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

0910 AM    CLARKSVILLE               TN   WIND DAMAGE
11/24/01   MONTGOMERY                     LAW ENFORCEMENT REPORTED A
                                          POWER LINE DOWN IN
                                          CLARKSVILLE

JBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 24, 7:03 AM CST	Severe Thunderstorm Warning	OHX	Benton	27 min
Nov 24, 9:08 AM CST	Severe Thunderstorm Warning	OHX	Montgomery, Robertson	52 min
Nov 24, 10:00 AM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys	45 min
Nov 24, 12:17 PM CST	Severe Thunderstorm Warning	OHX	Robertson	23 min
Nov 24, 1:00 PM CST	Tornado Warning	OHX	Lincoln	30 min
Nov 24, 1:06 PM CST	Severe Thunderstorm Warning	OHX	Williamson	24 min
Nov 24, 1:27 PM CST	Tornado Warning	OHX	Moore	18 min
Nov 24, 1:39 PM CST	Tornado Warning	OHX	Coffee, Franklin	36 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2001 Every severe thunderstorm warning in 2001

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.