Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 35, NWS Nashville, TN

March 23, 2011DeKalb County, Smith County, Wilson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 23, 2011, 6:03 PM CDT for DeKalb County, Smith County, Wilson County, Tennessee. It was in force for 27 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 23, 2011, 6:03 PM CDT (23:03 UTC)
Expired: Mar 23, 2011, 6:30 PM CDT
In force: 27 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties DeKalb County, TN, Smith County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 48 km from the middle of the area, began a volume at 23:06 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
Mar 23, 6:19 PM CDT	TORNADO	2 E Watertown, TN	HUNDREDS OF TREES WERE UPROOTED OR SNAPPED ALONG A NEARLY CONTINUOUS 6 MILE PATH. SEVERAL HOMES SUFFERED SIGNIFICANT ROOF DAMAGE...AND A COUPLE BARNS AND OUTBUILDINGS WERE DESTROYED. THE TORNADO CLIPPED THE FAR SOUTHWESTERN TIP OF SMITH COUNTY AS IT MOVED INTO
Mar 23, 6:20 PM CDT	TSTM WND DMG	2 Se Watertown, TN	BARN BLOWN DOWN ON OLD ALEXANRIA ROAD. EMA EN ROUTE TO SURVEY DAMAGE.
Mar 23, 6:20 PM CDT	TSTM WND DMG	3 E Watertown, TN	ROOF BLOWN OFF A HOME ON HALEY ROAD.
Mar 23, 6:35 PM CDT	HAIL 1	3 N Alexandria, TN	TRAINED SPOTTER RPT QUARTER SIZED HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 23, 4:06 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.1 hours before the alert went out and 48 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: 999 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 301 m²/s²
0-3 km storm-relative helicity: 319 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.

775 
WUUS54 KOHX 232303
SVROHX
TNC041-159-189-232330-
/O.NEW.KOHX.SV.W.0035.110323T2303Z-110323T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
603 PM CDT WED MAR 23 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DEKALB COUNTY IN MIDDLE TENNESSEE...
  SOUTHERN SMITH COUNTY IN MIDDLE TENNESSEE...
  WILSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 630 PM CDT

* AT 602 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE SEVERE STORMS 
  EXTENDED FROM WATERTOWN TO RURAL HILL...AND WERE MOVING SOUTHEAST  
  AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GORDONSVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING LARGE 
HAIL IN MOUNT JULIET. TAKE SHELTER NOW INSIDE A STURDY 
BUILDING...AND STAY AWAY FROM WINDOWS! IF TIME ALLOWS...PUT YOUR 
AUTOMOBILES INTO A CARPORT OR GARAGE.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A
STRONG BUILDING...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 3617 8579 3613 8581 3607 8576 3609 8573
      3606 8567 3597 8598 3596 8602 3598 8609
      3596 8610 3596 8615 3606 8644 3611 8653
      3614 8652 3615 8655 3627 8611
TIME...MOT...LOC 2302Z 291DEG 35KT 3621 8610 3611 8646

$$

FORECASTER: ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 1:45 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	15 min
Mar 23, 2:04 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Putnam, White	26 min
Mar 23, 2:07 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	23 min
Mar 23, 2:28 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	22 min
Mar 23, 2:47 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	13 min
Mar 23, 5:30 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton	60 min
Mar 23, 5:37 PM CDT	Severe Thunderstorm Warning	OHX	Trousdale, Wilson	23 min
Mar 23, 6:11 PM CDT	Tornado Warning	OHX	DeKalb, Smith, Wilson	34 min
Mar 23, 6:15 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	30 min
Mar 23, 6:40 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	35 min
Mar 23, 6:42 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Rutherford	34 min
Mar 23, 6:44 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	16 min
Mar 23, 6:51 PM CDT	Tornado Warning	OHX	Rutherford	24 min
Mar 23, 6:52 PM CDT	Tornado Warning	OHX	DeKalb, White	23 min
Mar 23, 6:59 PM CDT	Tornado Warning	OHX	Giles	31 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.