Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 470, NWS Nashville, TN

August 27, 2003Davidson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 27, 2003, 2:55 PM CDT for Davidson 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 outline as issued.

The facts

Issued: Aug 27, 2003, 2:55 PM CDT (19:55 UTC)
Expired: Aug 27, 2003, 3:30 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Davidson County, TN

The radar

The Nashville radar (KOHX), 21 km from the middle of the area, began a volume at 19:58 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 8 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: 2226 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 999 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 17 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 271955
SVRBNA
TNC037-272030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
255 PM CDT WED AUG 27 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 330 PM CDT

* AT 2546 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR SOUTH CENTRAL DAVIDSON COUNTY...OR 10
  MILES SOUTHEAST OF NASHVILLE...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  IN SOUTHEASTERN DAVIDSON COUNTY BY 310 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING.

LAT...LON 3612 8655 3612 8650 3606 8651 3607 8654
          3602 8659 3598 8659 3598 8664 3600 8670
          3600 8675 3606 8675 3611 8670 3618 8666

$$

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 Aug 27, 2:43 PM CDT, 12 minutes earlier.

Area forecast discussion, Aug 27, 2:43 PM CDT, 12 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
243 PM CDT WED AUG 27 2003

CURRENTLY, AFTERNOON CONVECTION HAS BLOSSOMED, WITH SEVERAL REPORTS
OF SEVERE DAMAGE AND HAIL ALREADY HAVING BEEN RECEIVED. THE STORMS
AND CLOUD COVER HAVE HELPED TO RETARD AFTERNOON TEMPERATURES,
ALTHOUGH SOME STATIONS HAVE STILL CLEARED 90 DEGREES.

MODELS CONTINUE TO SHOW LITTLE CHANGE IN AIR MASS CHARACTERISTICS
THROUGH THE WEEKEND. A CONTINUED MOIST AND UNSTABLE ENVIRONMENT,
COUPLED WITH THE EFFECTS OF DAYTIME HEATING, SHOULD PRODUCE MORE
THUNDERSTORMS TOMORROW AND FRIDAY. AN APPROACHING FRONTAL SYSTEM
FROM THE NORTHWEST WILL BEGIN TO EFFECT OUR WEATHER BY SATURDAY IN
THE FORM OF MORE CLOUDS, SLIGHTLY COOLER HIGH TEMPERATURES, AND MORE
ACTIVE WEATHER.

AVIATION MODEL DEVELOPS A GULF LOW DURING THE WEEKEND, WHICH IS THEN
FORECAST TO RIDE UP THE STALLED FRONTAL BOUNDARY AND INTO THE MID
STATE BY LABOR DAY, ALTHOUGH THE NOGAPS MODEL BRINGS THE FRONT ON
THROUGH DURING THE WEEKEND, AND DOES NOT BRING A SECONDARY LOW
NORTHWARD INTO THE LOCAL AREA. SO WILL TREND BACK FROM THE AVIATION
MODEL SOMEWHAT, ALTHOUGH COOLER TEMPERATURES CAN STILL BE EXPECTED
NEXT WEEK.

.BNA...NONE.

ROSE

Hazardous weather outlook, Aug 27, 6:40 AM CDT, 8 hours 15 minutes before

TNZ005>011-022>034-056>066-075>080-093>097-281030-

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
640 AM CDT WED AUG 27 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS MIDDLE TENNESSEE TODAY
AND THIS EVENING. HEAT AND HUMIDITY WILL COMBINE TO PRODUCE HEAT
INDEX READINGS AROUND 100 DEGREES IN MUCH OF THE MID STATE THIS
AFTERNOON. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR MAINLY DURING THE
AFTERNOON AND EVENING EACH DAY THROUGH THE WEEKEND. THE PROBABILITY
FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF SPOTTERS AND EMERGENCY MANAGERS IS NOT LIKELY.

31/13

In the hours before

Local storm report, Aug 27, 1:53 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0153 PM CDT WED AUG 27 2003

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

0140 PM    MINOR HILL                TN   WIND DAMAGE
08/27/03   GILES                          TREES AND POWER LINES DOWN

05

Local storm report, Aug 27, 2:08 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0208 PM CDT WED AUG 27 2003

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

0200 PM    COLLINWOOD                TN   WIND DAMAGE
08/27/03   WAYNE                          POWER LINES DOWN

05

Local storm report, Aug 27, 2:09 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0209 PM CDT WED AUG 27 2003

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

0200 PM    TULLAHOMA                 TN   0.50 IN HAIL
08/27/03   COFFEE

05

Local storm report, Aug 27, 2:19 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0219 PM CDT WED AUG 27 2003

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

0210 PM    WINCHESTER                TN   WIND DAMAGE
08/27/03   FRANKLIN                       TREE DOWN

05

Local storm report, Aug 27, 2:23 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
0223 PM CDT WED AUG 27 2003

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

0208 PM    HENDERSONVILLE            TN   WIND DAMAGE
08/27/03   SUMNER                         ROOF DAMAGE TO AN
                                          ELEMENTARY SCHOOL, TREES
                                          DOWN, AND POWER LINES DOWN

05

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 12:53 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	37 min
Aug 27, 1:44 PM CDT	Severe Thunderstorm Warning	OHX	Giles	31 min
Aug 27, 1:46 PM CDT	Severe Thunderstorm Warning	OHX	Moore	14 min
Aug 27, 1:55 PM CDT	Severe Thunderstorm Warning	OHX	Franklin	50 min
Aug 27, 1:58 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	32 min
Aug 27, 2:14 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	31 min
Aug 27, 2:23 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence	37 min
Aug 27, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	43 min
Aug 27, 2:35 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	40 min
Aug 27, 2:49 PM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	116 min
Aug 27, 3:29 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	31 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.