Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 221, NWS Nashville, TN

May 7, 2003Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 7, 2003, 7:42 AM CDT for Maury County, Williamson County, Tennessee. It was in force for 48 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: May 7, 2003, 7:42 AM CDT (12:42 UTC)
Expired: May 7, 2003, 8:30 AM CDT
In force: 48 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

Counties Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 63 km from the middle of the area, began a volume at 12:44 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
May 7, 4:55 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 0.7 hours before the alert went out and 52 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: 865 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -232 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 071242
SVRBNA
TNC119-187-071330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
741 AM CDT WED MAY 7 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAURY COUNTY IN TENNESSEE
  WILLIAMSON COUNTY IN TENNESSEE

* UNTIL 830 AM CDT

* AT 734 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM FAIRVIEW TO 15 MILES WEST OF
  COLUMBIA...OR FROM 14 MILES SOUTHEAST OF DICKSON TO 11 MILES
  SOUTHEAST OF CENTERVILLE...MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE...NEAR
  COLUMBIA...FRANKLIN AND BRENTWOOD

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING. IF
SEVERE THUNDERSTORMS APPROACH YOUR AREA...GO TO A SAFE PLACE.
ESPECIALLY IF YOU LIVE IN A MOBILE HOME.

&&

LAT...LON 3607 8719 3562 8742 3552 8686 3597 8663

$$
END/JAO

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 May 7, 2:30 AM CDT, 5 hours 12 minutes earlier.

Area forecast discussion, May 7, 2:30 AM CDT, 5 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
230 AM CDT WED MAY 7 2003

CURRENT SURFACE ANALYSIS SHOWING WELL DEFINE TROF AXIS PUSHING ACROSS
THE CWA...WHICH IS STRETCHING THROUGH WAVE ACROSS WEST TN AND UP INTO
CENTRAL IL. COLD FRONT STRETCHES FROM NEAR STL TO DFW. AIRMASS QUITE
UNSTABLE WITH DEWPOINTS AROUND 70. THUNDERSTORMS BREAKING OUT ALL
OVER THE AREA.

SURFACE LOW EXPECTED TO MOVE ACROSS THE SOUTHERN OH VALLEY TODAY...
DRAGGING THE COLD FRONT ACROSS THE CWA 15-21Z OR SO. THIS ALONG WITH
EASTWARD MOVING UPPER SHORTWAVE EXPECTED TO SWEEP DEEP MOISTURE OUT
OF THE AREA LATE THIS AFTERNOON. PREVIOUS TO THIS HOWEVER...EXPECT
WIDESPREAD STRONG/SEVERE THUNDERSTORMS TO CONTINUE INTO THE EARLY
AFTERNOON. WILL CONTINUE FLOOD WATCH THROUGH THIS AFTERNOON WITH
LOCALIZED FLOODING OCCURRING AND FF GUIDANCE BASICALLY AT NIL.

DRY SLOT REMAINS OVER THE AREA TONIGHT AS VERY BRIEF RIDGING SWINGS
BY...DO NOT PLAN ANY POPS EXCEPT FOR SLIGHT CHANCE ALONG THE PLATEAU.

LL BOUNDARIES EXTENDING FROM PLAINS LOWS PUSH BACK ACROSS THE AREA
THURSDAY. ADDED TO A TONGUE OF DEEPER MOISTURE ALONG WITH UPPER
SHORTWAVE IN THE VICINITY...WILL LEAVE CHANCE POPS RUNNING THURSDAY/
THURSDAY NIGHT.

BNA 81/62/80/65 +133
CSV 74/58/81/60 +233

07
.BNA...FLOOD WATCH ALL ZONES THROUGH NOON TODAY.

Hazardous weather outlook, May 7, 5:30 AM CDT, 2 hours 12 minutes before

TNZ005>011-022>034-056>066-075>080-093>097-081030-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT WED MAY 7 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT
STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO CROSS THE MID-
STATE THROUGH MUCH OF TODAY...WITH ONLY ISOLATED STORMS EXPECTED
ON THE PLATEAU TONIGHT. WHILE THUNDERSTORMS MAY PRODUCE LARGE HAIL
AND WIND DAMAGE...FLOODING SEEMS TO BE THE BIGGEST THREAT TODAY.
MOST LOCATIONS HAVE HAD 3 TO 5 INCHES OR MORE OF RAINFALL IN THE
PAST TWO DAYS...AND ANY ADDITIONAL RAINFALL COULD CAUSE MAJOR
PROBLEMS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH MUCH OF THE
PERIOD. WHILE WIDESPREAD HAZARDOUS WEATHER IS NOT EXPECTED...LOCALLY
SEVERE THUNDERSTORMS ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD REMAIN ALERT
AGAIN TODAY FOR ACTIVATION.

07

In the hours before

Local storm report, May 7, 4:46 AM CDT, 2 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0446 AM CDT WED MAY 07 2003

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

0255 AM    LAFAYETTE                 TN   WIND DAMAGE
05/07/03   MACON                          TREES AND POWER LINES DOWN
                                          ACROSS THE COUNTY REPORTED
                                          BY LAW ENFORCEMENT.

MED

Local storm report, May 7, 4:48 AM CDT, 2 hours 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0448 AM CDT WED MAY 07 2003

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

0255 AM    6 S LAFAYETTE             TN   FLOOD
05/07/03   MACON                          HIGHWAY 10 SOUTH NEAR
                                          HILLSDALE FLOODED AND
                                          CLOSED REPORTED BY EMA.

MED

Local storm report, May 7, 4:52 AM CDT, 2 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0452 AM CDT WED MAY 07 2003

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

0300 AM    9 SE LAFAYETTE            TN   AVALANCHE
05/07/03   MACON                          HWY 80 SOUTH NEAR
                                          MACON/SMITH COUNTYLINE
                                          CLOSED DUE TO FLOODING
                                          REPORTED BY LAW
                                          ENFORCEMENT.

MED

Local storm report, May 7, 4:52 AM CDT, 2 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0452 AM CDT WED MAY 07 2003

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

0300 AM    9 SE LAFAYETTE            TN   FLOOD
05/07/03   MACON                          HWY 80 SOUTH NEAR
                                          MACON/SMITH COUNTYLINE
                                          CLOSED DUE TO FLOODING
                                          REPORTED BY LAW
                                          ENFORCEMENT.

MED

Local storm report, May 7, 5:02 AM CDT, 2 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0502 AM CDT WED MAY 07 2003

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

0325 AM    LIVINGSTON                TN   WIND DAMAGE
05/07/03   OVERTON                        NUMEROUS TREES AND POWER
                                          LINES DOWN COUNTYWIDE
                                          REPORTED BY LAW
                                          ENFORCEMENT.

MED

Local storm report, May 7, 6:08 AM CDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0608 AM CDT WED MAY 07 2003

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

0210 AM    10 NE NASHVILLE           TN   WIND DAMAGE
05/07/03   DAVIDSON                       3 BUILDINGS DAMAGED AT
                                          RIVERGATE MALL WITH
                                          NUMEROUS TREES DOWN
                                          REPORTED BY EMA.

MED

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 11:16 PM CDT	Severe Thunderstorm Warning	OHX	Franklin, Lincoln	29 min
May 6, 11:42 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall	33 min
May 6, 11:44 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Franklin, Moore	46 min
May 6, 11:51 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	39 min
May 6, 11:52 PM CDT	Flash Flood Warning	OHX	Bedford, Coffee, Franklin, Giles, Grundy, Lawrence and 7 more	3 hr
May 6, 11:59 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Williamson	31 min
May 7, 12:12 AM CDT	Flash Flood Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	3 hr
May 7, 12:13 AM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Warren	32 min
May 7, 12:19 AM CDT	Severe Thunderstorm Warning	OHX	Stewart	41 min
May 7, 12:21 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	39 min
May 7, 12:27 AM CDT	Flash Flood Warning	OHX	Cheatham, Davidson, Williamson	3 hr
May 7, 12:38 AM CDT	Flash Flood Warning	OHX	Cannon, DeKalb, Rutherford, Van Buren, Warren, White and 1 more	3 hr
May 7, 12:57 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	33 min
May 7, 1:05 AM CDT	Flash Flood Warning	OHX	Dickson, Hickman	3 hr
May 7, 1:12 AM CDT	Severe Thunderstorm Warning	OHX	Montgomery	48 min
May 7, 1:20 AM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner	50 min
May 7, 1:27 AM CDT	Flash Flood Warning	OHX	Robertson, Sumner	3 hr
May 7, 1:29 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Perry	31 min
May 7, 1:31 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Wilson	54 min
May 7, 1:46 AM CDT	Flash Flood Warning	OHX	Macon, Smith, Trousdale	3 hr
May 7, 1:48 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Robertson, Williamson	42 min
May 7, 2:22 AM CDT	Severe Thunderstorm Warning	OHX	Sumner	43 min
May 7, 2:28 AM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Trousdale, Wilson	47 min
May 7, 2:32 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford, Williamson	43 min
May 7, 2:53 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton, Putnam, Smith and 1 more	57 min
May 7, 3:01 AM CDT	Flash Flood Warning	OHX	Bedford, Coffee, Franklin, Giles, Grundy, Lawrence and 8 more	3 hr
May 7, 3:30 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett	55 min
May 7, 3:37 AM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Van Buren, Warren, White	53 min
May 7, 3:57 AM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	48 min
May 7, 5:05 AM CDT	Flash Flood Warning	OHX	Benton, Cannon, Cheatham, Clay, Cumberland, Davidson and 22 more	6 hr
May 7, 5:12 AM CDT	Severe Thunderstorm Warning	OHX	Lewis, Wayne	33 min
May 7, 5:48 AM CDT	Severe Thunderstorm Warning	OHX	Lewis, Maury	42 min
May 7, 5:55 AM CDT	Severe Thunderstorm Warning	OHX	Perry	50 min
May 7, 6:12 AM CDT	Flash Flood Warning	OHX	Bedford, Coffee, Franklin, Giles, Grundy, Hickman and 8 more	6 hr
May 7, 6:22 AM CDT	Flash Flood Warning	OHX	Warren	6 hr
May 7, 6:47 AM CDT	Tornado Warning	OHX	Bedford, Rutherford	43 min
May 7, 6:58 AM CDT	Tornado Warning	OHX	Marshall, Williamson	32 min
May 7, 7:31 AM CDT	Severe Thunderstorm Warning	OHX	Hickman	44 min
May 7, 7:35 AM CDT	Tornado Warning	OHX	Cannon, DeKalb, Wilson	25 min
May 7, 8:00 AM CDT	Severe Thunderstorm Warning	OHX	Putnam	45 min
May 7, 8:03 AM CDT	Severe Thunderstorm Warning	OHX	Rutherford	42 min
May 7, 8:07 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson	38 min
May 7, 8:27 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall	48 min
May 7, 8:52 AM CDT	Severe Thunderstorm Warning	OHX	DeKalb, White	43 min
May 7, 9:15 AM CDT	Severe Thunderstorm Warning	OHX	Coffee	30 min
May 7, 9:18 AM CDT	Severe Thunderstorm Warning	OHX	Bedford	42 min
May 7, 10:50 AM CDT	Flash Flood Warning	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 25 more	5 hr

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.