Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 257, NWS Nashville, TN

October 24, 2001Franklin County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Oct 24, 2001, 9:21 PM CDT for Franklin County, Tennessee. It was in force for 54 min. 2 reports 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: Oct 24, 2001, 9:21 PM CDT (02:21 UTC)
Expired: Oct 24, 2001, 10:15 PM CDT
In force: 54 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Franklin County, TN

The radar

The Northeast Alabama radar (KHTX), 25 km from the middle of the area, began a volume at 02:24 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.

What was reported inside it

Time	Report	Where	Remark
Oct 24, 9:43 PM CDT	Thunderstorm Wind 51 M	Winchester, TN	Spotter measured 60 mph wind gust.
Oct 24, 9:43 PM CDT	Hail 1	Winchester, TN	Spotter reported quarter size hail.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Oct 24, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.4 hours before the alert went out and 118 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: 659 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1147 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

767 
WUUS54 KOHX 250225
SVRBNA
TNC051-250315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
921 PM CDT WED OCT 24 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN TENNESSEE
  THIS INCLUDES THE CITY OF WINCHESTER

* UNTIL 1015 PM CDT

* AT 917 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS APPROACHING FRANKLIN COUNTY. THE LINE
  OF SEVERE THUNDERSTORMS WILL MOVE FROM WEST TO EAST ACROSS THE COUNTY
  WITH DAMAGING WINDS AND HAIL ALONG WITH DANGEROUS LIGHTNING STRIKES.

* THE SEVERE THUNDERSTORM WILL BE OVER...
  WINCHESTER AT 940 PM CDT
  ESTILL SPRINGS AT 955 PM CDT

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.

$$
BOYD
LAT...LON 3511 8633 3496 8626 3509 8589 3533 8613

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 Oct 24, 2:30 PM CDT, 6 hours 51 minutes earlier.

Area forecast discussion, Oct 24, 2:30 PM CDT, 6 hours 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
230 PM CDT WED OCT 24 2001

CURRENT...WATCH BOX ISSUED UP TO OUR BORDER THRU 00Z. SQUALL LINE
JUST AHEAD OF FRONT NOW MAKING ITS WAY ACROSS CENTRAL AND SOUTHERN
IL...SE MO...AND NORTH CENTRAL AR. GUST TO 58 KTS ASSOCIATED WITH
THIS LINE AT ST CHARLES MO.

IN OUR NECK OF WOODS...NOT MUCH SUNSHINE TODAY SO TEMPS ONLY IN
UPPER 70S. 18Z REQUESTED SPC SOUNDING SHOWS FOLLOWING PARAMETERS
WHICH WOULD LEND CREDENCE TO POSSIBLE SVR THIS EVE...

LI..... -4
SWEAT INDEX... 324
0-3 KM HELICITY.... 361
WBZ... 10,400

FORECAST...TIMING STILL LOOKS SAME AS PREVIOUS FCST FOR ARRIVAL OF
ACTIVE WX TONITE...00Z-06Z ALMOST EXCLUSIVELY. FRONT THRU BNA
02Z-03Z AND CSV 04Z-05Z. MAINLY DAMAGING WINDS W/ SQUALL LINE
ALONG/JUST AHEAD OF FRONT. ISOLATED TORNADOES NOT OUT OF QUESTION
BUT MAINLY TO OUR N. WILL GO W/ HIER POPS TONITE THAN MOS.

AFTER QUICK SHOT TONITE...RAPID CLEARING AND MUCH COOLER. MORE
FALL-LIKE CONDITIONS WILL ENSUE WITH CONSECUTIVE SHOTS OF COLDER
AIR.

AS FOR TEMPS...MAV LOOKS TOO HI FOR TOMORROWS MAX WHILE FWC LOOKS
WAY TOO HI FOR FRI MAX. LO LEVEL TEMP SCHEME LOOKS BEST OF ALL.

BNA UU 47/61/38/57 8000
CSV UU 44/57/33/54 7000

.BNA...NONE.

MAG

In the hours before

Local storm report, Oct 24, 8:01 PM CDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
801 PM CDT WED OCT 24 2001

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

0801 PM    NASHVILLE                 TN   70 MPH TSTM WIND GUST
10/24/01   DAVIDSON                       AMATEUR RADIO REPORT OF
                                          MULTIPLE TREES AND POWER
                                          POLES DOWN AROUND THE METRO
                                          AREA.

JAO

Local storm report, Oct 24, 8:13 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
813 PM CDT WED OCT 24 2001

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

0800 PM    BRENTWOOD                 TN   .75 INCH HAIL
10/24/01   WILLIAMSON                     DIME SIZE HAIL COVERED THE
                                          ROADS FROM BRENTWOOD TO
                                          FRANKLIN. REPORT RELAYED BY
                                          SPOTTERS.

0815 PM    SMYRNA                    TN   69 MPH TSTM WIND GUST
10/24/01   RUTHERFORD                     WINDS MEASURED BY SPOTTER
                                          TO BE 69 MPH OR 60 KTS.

JAO

Local storm report, Oct 24, 8:19 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
819 PM CDT WED OCT 24 2001

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

0815 PM    SMYRNA                    TN   .75 INCH HAIL
10/24/01   RUTHERFORD                     DIME SIZE HAIL REPORTED BY
                                          SPOTTER.

0820 PM    SMYRNA                    TN   1.00 INCH HAIL
10/24/01   RUTHERFORD                     QUARTER SIZE HAIL REPORTED
                                          BY SPOTTER NEAR THE
                                          PONDEROSA.

0826 PM    3 NW MURFREESBORO         TN   65 MPH TSTM WIND GUST
10/24/01   RUTHERFORD                     SPOTTER REPORTED A TREE 6
                                          INCHES IN DIAMETER WAS
                                          BLOWN DOWN.

JAO

Local storm report, Oct 24, 8:35 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
835 PM CDT WED OCT 24 2001

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

0745 PM    GALLATIN                  TN   70 MPH TSTM WIND GUST
10/24/01   SUMNER                         NUMEROUS TREES DOWN FROM
                                          GALLATIN TO PORTLAND ALONG
                                          HIGHWAY 109. HIGHWAY 109 IS
                                          SHUT DOWN. ALSO...A 130
                                          FOOT TOWER IN THIS AREA WAS
                                          BLOWN DOWN.

0740 PM    OLD HICKORY               TN   65 MPH TSTM WIND GUST
10/24/01   DAVIDSON                       NUMEROUS TREES AND POWER
                                          LINES WERE DOWN.

0826 PM    2 SE LAWRENCEBURG         TN   70 MPH TSTM WIND GUST
10/24/01   LAWRENCE                       AMATEUR RADIO REPORTED
                                          NUMEROUS TREES DOWN.

Local storm report, Oct 24, 8:48 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
848 PM CDT WED OCT 24 2001

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

0840 PM    CORNERSVILLE              TN   65 MPH TSTM WIND GUST
10/24/01   MARSHALL                       SKYWARN SPOTTER REPORTED
                                          POWER LINES DOWN.

0845 PM    2 S MURFREESBORO          TN   .75 INCH HAIL
10/24/01   RUTHERFORD                     SKYWARN SPOTTER REPORTED
                                          DIME SIZE HAIL.

JAO

Local storm report, Oct 24, 9:06 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE,TN
906 PM CDT WED OCT 24 2001

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

0825 PM    ENTERPRISE                TN   65 MPH TSTM WIND GUST
10/24/01   MAURY                          SPOTTER REPORTED NUMEROUS
                                          TREES DOWN IN ENTERPRISE
                                          AND EAST ON HIGHWAY 50.

0825 PM    NORTHWESTERN SECTIONS     TN   65 MPH TSTM WIND GUST
10/24/01   LAWRENCE                       AMATEUR RADIO REPORT OF
                                          NUMEROUS TREES DOWN ALONG
                                          HIGHWAY 240 IN NORTHWEST
                                          LAWRENCE COUNTY.

0900 PM    6 S MURFREESBORO          TN   70 MPH TSTM WIND GUST
10/24/01   RUTHERFORD                     SPOTTER REPORTED DAMAGE TO
                                          HIS ROOF. ALSO TREES WERE
                                          DOWN.

JAO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 7:10 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Perry	50 min
Oct 24, 7:26 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Williamson	49 min
Oct 24, 7:28 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Wayne	62 min
Oct 24, 7:37 PM CDT	Severe Thunderstorm Warning	OHX	Sumner	38 min
Oct 24, 7:51 PM CDT	Tornado Warning	OHX	Williamson	39 min
Oct 24, 7:52 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Maury	53 min
Oct 24, 7:55 PM CDT	Severe Thunderstorm Warning	OHX	Wilson	35 min
Oct 24, 8:01 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Trousdale	44 min
Oct 24, 8:09 PM CDT	Severe Thunderstorm Warning	OHX	Giles	36 min
Oct 24, 8:10 PM CDT	Tornado Warning	OHX	Rutherford	35 min
Oct 24, 8:20 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson	55 min
Oct 24, 8:25 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall	50 min
Oct 24, 8:50 PM CDT	Severe Thunderstorm Warning	OHX	Lincoln, Moore	55 min
Oct 24, 8:52 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Overton, Putnam	53 min
Oct 24, 8:52 PM CDT	Severe Thunderstorm Warning	OHX	Pickett	53 min
Oct 24, 8:56 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford	34 min
Oct 24, 9:10 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Warren	50 min
Oct 24, 9:24 PM CDT	Tornado Warning	OHX	Coffee, Grundy	36 min
Oct 24, 9:32 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, White	48 min
Oct 24, 9:39 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	51 min
Oct 24, 10:22 PM CDT	Severe Thunderstorm Warning	OHX	Franklin	28 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.