Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 328, NWS Nashville, TN

June 28, 20114 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 28, 2011, 3:04 AM CDT for 4 counties in Tennessee. It was in force for 25 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: Jun 28, 2011, 3:04 AM CDT (08:04 UTC)
Expired: Jun 28, 2011, 3:29 AM CDT
In force: 25 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Smith County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 36 km from the middle of the area, began a volume at 08:07 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 00:00Z, 8.1 hours before the alert went out and 45 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: 2905 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

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

110 
WUUS54 KOHX 280804
SVROHX
TNC159-165-169-189-280900-
/O.NEW.KOHX.SV.W.0328.110628T0804Z-110628T0900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
304 AM CDT TUE JUN 28 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL SMITH COUNTY IN MIDDLE TENNESSEE...
  TROUSDALE COUNTY IN MIDDLE TENNESSEE...
  SOUTHEASTERN SUMNER COUNTY IN MIDDLE TENNESSEE...
  NORTH CENTRAL WILSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 400 AM CDT

* AT 303 AM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. THE STORM WAS NEAR GALLATIN...MOVING SOUTHEAST AT 25
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARTSVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

&&

LAT...LON 3644 8615 3644 8614 3625 8597 3624 8640
      3644 8647 3647 8617
TIME...MOT...LOC 0804Z 315DEG 23KT 3642 8632

$$

21

1 follow-up statement

244 
WWUS54 KOHX 280829
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
329 AM CDT TUE JUN 28 2011

TNC159-165-169-189-280839-
/O.CAN.KOHX.SV.W.0328.000000T0000Z-110628T0900Z/
SMITH TN-TROUSDALE TN-SUMNER TN-WILSON TN-
329 AM CDT TUE JUN 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WILSON...
SOUTHEASTERN SUMNER...TROUSDALE AND WEST CENTRAL SMITH COUNTIES IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 3644 8615 3644 8614 3625 8597 3624 8640
      3644 8647 3647 8617
TIME...MOT...LOC 0829Z 315DEG 23KT 3631 8618

$$

21

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 Jun 27, 11:17 PM CDT, 3 hours 47 minutes earlier.

Area forecast discussion, Jun 27, 11:17 PM CDT, 3 hours 47 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1117 PM CDT MON JUN 27 2011

.UPDATE...ADDED AVIATION SECTION.

&&

.AVIATION...BNA/CSV...SHORTWAVE APPROACHING MIDDLE TENNESSEE FROM
THE NW WILL BRING SCATTERED CONVECTION TO THE MID STATE LATE
TONIGHT AND EARLY TOMORROW MORNING. LOW-LEVEL MOISTURE WILL LINGER
TOMORROW AS A WEAK SURFACE FRONT DROPS INTO MIDDLE TENNESSEE FROM
THE NORTH, BRINGING ADDITIONAL SCATTERED STORMS DURING THE
AFTERNOON. WILL HANDLE THE LATTER PERIOD WITH "CB" REMARKS FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 1023 PM CDT MON JUN 27 2011/

UPDATE...SHOWERS AND SCATTERED THUNDERSTORMS HAVE CONTINUED TO
DEVELOP OVER CENTRAL AND SOUTHWESTERN KENTUCKY, AND BELIEVE THIS
AREA OF PRECIPITATION WILL SINK SOUTHWARD INTO NORTHERN MIDDLE
TENNESSEE BETWEEN 06Z AND 12Z. THUS, WILL INCREASE POPS TO "LIKELY"
OVER OUR NORTHERN COUNTIES (INCLUDING THE NASHVILLE METRO AREA).

WILL PROBABLY LEAVE THE REST OF THE OVERNIGHT FORECAST AS IT IS,
AND TRY TO GET A ZFP UPDATE OUT IN THE NEXT FEW MINUTES.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

ROSE

Hazardous weather outlook, Jun 27, 5:05 PM CDT, 9 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
505 PM CDT MON JUN 27 2011

TNZ005>011-022>034-056>066-075-077>080-093>095-281030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
505 PM CDT MON JUN 27 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

SEVERE POTENTIAL WILL INCREASE LATE TONIGHT AS A COLD FRONT
APPROACHES. STORMS MAY PRODUCE GUSTY TO DAMAGING WINDS AND PEA TO
QUARTER SIZED HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A SLIGHT RISK OF SEVERE STORMS WILL CARRY OVER INTO LATE MORNING
TUESDAY AS THE FRONT PASSES BUT THAT RISK WILL BE MOSTLY ACROSS
THE SOUTH...AND ESPECIALLY TOWARD THE ALABAMA BORDER.

.SPOTTER INFORMATION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS WILL LIKELY BE NEEDED.

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

ROSE

In the hours before

Special weather statement, Jun 28, 2:13 AM CDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
213 AM CDT TUE JUN 28 2011

TNZ008-009-280815-
MACON-SUMNER-
213 AM CDT TUE JUN 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR MACON AND SUMNER COUNTIES...

AT 208 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 10 MILES WEST OF SCOTTSVILLE...OR 25 MILES
NORTHWEST OF LAFAYETTE...MOVING SOUTHEAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  WESTMORELAND BY 245 AM CDT.
  6 MILES SOUTHWEST OF LAFAYETTE BY 305 AM CDT.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3661 8580 3645 8584 3648 8612 3647 8618
      3649 8623 3648 8622 3647 8623 3640 8669
      3665 8655

21

Special weather statement, Jun 28, 2:43 AM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
243 AM CDT TUE JUN 28 2011

TNZ005-006-280845-
MONTGOMERY-STEWART-
243 AM CDT TUE JUN 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR MONTGOMERY AND STEWART
COUNTIES...

AT 240 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PEMBROKE TO
MURRAY...OR ALONG A LINE EXTENDING FROM OAK GROVE TO MURRAY...MOVING
SOUTHEAST AT 25 MPH.

THESE STORMS WILL BE NEAR...
  GUTHRIE BY 305 AM CDT.
  CLARKSVILLE BY 315 AM CDT.
  DOVER BY 320 AM CDT.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3668 8791 3667 8787 3665 8785 3666 8713
      3648 8714 3639 8802 3642 8805 3658 8805
      3667 8808 3668 8807

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 2:13 AM CDT	Special Weather Statement	OHX	Macon, Sumner	62 min
Jun 28, 2:21 AM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner	39 min
Jun 28, 2:43 AM CDT	Special Weather Statement	OHX	Montgomery, Stewart	62 min
Jun 28, 3:01 AM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson	44 min
Jun 28, 3:17 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Montgomery, Robertson	58 min
Jun 28, 3:23 AM CDT	Special Weather Statement	OHX	Houston, Stewart	67 min
Jun 28, 3:38 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner, Wilson	52 min
Jun 28, 4:08 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Wilson	37 min
Jun 28, 4:32 AM CDT	Special Weather Statement	OHX	DeKalb	58 min
Jun 28, 4:36 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Smith, Warren, Wilson	38 min
Jun 28, 5:35 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Hickman, Lewis, Marshall, Maury	55 min
Jun 28, 5:38 AM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Warren	37 min
Jun 28, 5:49 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury	56 min
Jun 28, 5:57 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Marshall, Rutherford	40 min
Jun 28, 8:56 AM CDT	Special Weather Statement	OHX	Lawrence, Lewis	34 min
Jun 28, 9:21 AM CDT	Flash Flood Warning	OHX	Giles, Lawrence, Lewis, Maury	3 hr
Jun 28, 9:53 AM CDT	Flash Flood Warning	OHX	Lawrence, Lewis, Perry, Wayne	3 hr
Jun 28, 10:06 AM CDT	Severe Thunderstorm Warning	OHX	Benton	39 min
Jun 28, 10:26 AM CDT	Severe Thunderstorm Warning	OHX	Perry, Wayne	34 min
Jun 28, 10:29 AM CDT	River Flood Warning	OHX	Bedford	11 hr
Jun 28, 10:44 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys, Perry	31 min
Jun 28, 10:58 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lawrence, Lewis, Perry, Wayne	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011 Every severe thunderstorm warning in 2011

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.