Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 384, NWS Nashville, TN

July 21, 2003Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 21, 2003, 2:28 PM CDT for Smith County, Tennessee. It was in force for 62 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, 2:28 PM CDT (19:28 UTC)
Expired: Jul 21, 2003, 3:30 PM CDT
In force: 62 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Smith County, TN

The radar

The Nashville radar (KOHX), 51 km from the middle of the area, began a volume at 19:29 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
Jul 21, 11:55 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.5 hours before the alert went out and 58 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.

000 
WUUS54 KOHX 211928
SVRBNA
TNC159-212030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
227 PM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 330 PM CDT

* AT 219 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 19 MILES NORTHWEST OF CARTHAGE...OR 4 MILES    
  NORTHWEST OF HARTSVILLE...MOVING EAST SOUTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CARTHAGE AROUND 245 PM CDT

SEVERE THUNDERSTORM WINDS CAN BE AS DESTRUCTIVE AS A TORNADO. FOR
YOUR SAFETY, GO TO A SAFE PLACE IMMEDIATELY.

&&

LAT...LON 3640 8606 3631 8612 3620 8608 3621 8585
          3640 8584

$$
05

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 Jul 21, 1:30 PM CDT, 58 minutes earlier.

Area forecast discussion, Jul 21, 1:30 PM CDT, 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
130 PM CDT MON JUL 21 2003

SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6 PM CDT.

VORT MAX DROPPING DOWN OVER SOUTHERN ILLINOIS THIS AFTERNOON HAS
ACTED TO ENHANCE ACTIVITY ACROSS THE AREA. VORT MAX SCOOTS OFF
TO OUR EAST BEFORE MIDNIGHT. ANOTHER VORT MAX DROPPING DOWN
THROUGH EASTERN MISSOURI AT 06Z TONIGHT SWINGS ACROSS THE MID STATE
BEFORE DAYBREAK. ALSO LOOKS LIKE ANOTHER STRONG VORT MAX COMING IN AROUND
MID DAY TUESDAY. ALL IN ALL A SERIES OF UPPER LEVEL DISTURBANCES
WILL SWING THROUGH THE AREA. ONE LAST SHOT COMES IN LATE TUESDAY
NIGHT BUT DRIER AIR PUNCHES IN FROM THE WEST BY DAYBREAK WEDNESDAY.

PRELIMINARY NUMBERS:

NASHVILLE  70 81 65 78 64   4641
CROSSVILLE 65 78 60 75 58   6662

.BNA...NONE.

BOYD
01

Hazardous weather outlook, Jul 21, 5:30 AM CDT, 8 hours 58 minutes before

TNZ005>011-022>034-056>066-075>080-093>097-221000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT MON JUL 21 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS POSSIBLE OVER EXTREME
WESTERN MIDDLE TENNESSEE THIS MORNING.  THEN...SCATTERED SHOWERS AND
THUNDERSTORMS WILL DEVELOPED THIS AFTERNOON...WITH SOME STORMS
POSSIBLE BECOMING SEVERE...MAINLY OVER AND NEAR THE CUMBERLAND
PLATEAU REGION. THERE WILL BE A SLIGHT RISK OF SEVERE THUNDERSTORMS
WITH DAMAGING WINDS AND LARGE HAIL TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

AS A COLD FRONT APPROACHES AND MOVES THROUGH MIDDLE TENNESSEE TUESDAY
...THERE WILL BE A SLIGHT RISK OF SEVERE THUNDERSTORMS WITH DAMAGING
WINDS AND LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...

 SPOTTER ACTIVITY MAY BE NECESSARY THIS AFTERNOON...EVENING...
AND TUESDAY.

31

In the hours before

Local storm report, Jul 21, 12:21 PM CDT, 2 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1221 PM CDT MON JUL 21 2003

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

1212 PM    9 SSW CAMDEN              TN   WIND DAMAGE
07/21/03   BENTON                         SHERIFFS OFFICE REPORTED
                                          TRESS DOWN ON POWER LINES
                                          IN HOLLADAY

05

Local storm report, Jul 21, 12:55 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1255 PM CDT MON JUL 21 2003

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

1240 PM    LOBELVILLE                TN   WIND DAMAGE
07/21/03   PERRY                          LOBELVILLE POLICE REPORTED
                                          TREES DOWN IN LOBELVILLE

05

Local storm report, Jul 21, 1:44 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0144 PM CDT MON JUL 21 2003

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

0107 PM    LINDEN                    TN   WIND DAMAGE
07/21/03   PERRY                          LOCAL OFFICIALS REPORTED
                                          TREES DOWN IN LINDEN

05

Local storm report, Jul 21, 1:47 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0147 PM CDT MON JUL 21 2003

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

0140 PM    WAYNESBORO                TN   0.50 IN HAIL
07/21/03   WAYNE

0140 PM    WAYNESBORO                TN   60 MPH WIND GUST
07/21/03   WAYNE                          COOP OBSERVER REPORTED
                                          WINDS 50 TO 60 MPH

05

Local storm report, Jul 21, 2:06 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0206 PM CDT MON JUL 21 2003

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

0203 PM    GOODLETTSVILLE            TN   0.50 IN HAIL
07/21/03   DAVIDSON                       SPOTTER REPORTED HALF INCH
                                          HAIL NEAR RIVERGATE

05

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, 2:05 PM CDT	Tornado Warning	OHX	Sumner	40 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, 2:42 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

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.