Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 22, NWS Nashville, TN

February 29, 20126 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 29, 2012, 3:30 PM CST for 6 counties in Tennessee. It was in force for 45 min. 7 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
Feb 29, 2012, 3:30 PM CST (21:30 UTC)
Expired
Feb 29, 2012, 4:15 PM CST
In force
45 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon

Counties Cumberland County, TN, Fentress County, TN, Jackson County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN

The radar

The Knoxville radar (KMRX), 134 km from the middle of the area, began a volume at 21:31 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

TimeReportWhereRemark
Feb 29, 3:30 PM CSTTSTM WND DMG8 N Cookeville, TNTREES DOWN. QUARTER SIZED HAIL ALSO REPORTED.
Feb 29, 3:30 PM CSTHAIL 15 Nne Algood, TNQUARTER SIZED HAIL REPORTED IN HICKMAN COUNTY
Feb 29, 3:35 PM CSTHAIL 13 S Livingston, TNHAIL REPORTED NEAR HIGHWAY 84 AND INDUSTRIAL DRIVE
Feb 29, 3:46 PM CSTHAIL 1.5Jamestown, TN
Feb 29, 3:50 PM CSTTSTM WND DMG5 Ssw Jamestown, TNREPORTS OF SEVERAL TREES DOWN NEAR BANNER SPRINGS ROAD...A FALLEN TREE DAMAGED A GARAGE IN THE SAME AREA.
Feb 29, 4:00 PM CSTHAIL 0.57 Sw Allardt, TNDIME SIZED HAIL REPORTED NORTH OF ALLARDT ALONG WITH ESTIMATED 40 MPH WINDS.
Feb 29, 4:25 PM CSTHAIL 0.54 Se Monterey, TN

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.

IssuedProductOfficeLasted
Feb 29, 11:31 AM CSTTornado WatchSPC8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.5 hours before the alert went out and 155 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2012-02-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2012-02-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 365 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
580 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
510 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
365 m²/s²
0-3 km storm-relative helicity
485 m²/s²
Significant tornado parameter
1.9
Supercell composite
8.5

Open this sounding in Storm Lab

The text

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

630 
WUUS54 KOHX 292130
SVROHX
TNC035-049-087-133-137-141-292215-
/O.NEW.KOHX.SV.W.0022.120229T2130Z-120229T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
330 PM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OVERTON COUNTY IN MIDDLE TENNESSEE...
  SOUTHWESTERN PICKETT COUNTY IN MIDDLE TENNESSEE...
  NORTHEASTERN PUTNAM COUNTY IN MIDDLE TENNESSEE...
  NORTHERN CUMBERLAND COUNTY IN MIDDLE TENNESSEE...
  FENTRESS COUNTY IN MIDDLE TENNESSEE...
  SOUTHEASTERN JACKSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 415 PM CST

* AT 324 PM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE SEVERE
  STORMS EXTENDED FROM LIVINGSTON TO ALGOOD...AND WERE MOVING EAST AT
  60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MONTEREY...
  JAMESTOWN...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM WEDNESDAY EVENING FOR
CENTRAL TENNESSEE.

&&

LAT...LON 3636 8470 3637 8473 3634 8473 3633 8477
      3629 8479 3629 8487 3624 8487 3621 8491
      3616 8490 3610 8483 3609 8480 3604 8477
      3613 8559 3646 8547 3653 8527 3652 8472
      3643 8469 3641 8466
TIME...MOT...LOC 2129Z 267DEG 54KT 3642 8524 3623 8537

$$

SHAMBURGER
1 follow-up statement
265 
WWUS54 KOHX 292149
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
349 PM CST WED FEB 29 2012

TNC087-137-141-292159-
/O.CAN.KOHX.SV.W.0022.000000T0000Z-120229T2215Z/
PICKETT TN-PUTNAM TN-JACKSON TN-
349 PM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JACKSON...
NORTHEASTERN PUTNAM AND SOUTHWESTERN PICKETT COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 3636 8470 3637 8473 3634 8473 3633 8477
      3629 8479 3629 8487 3624 8487 3621 8491
      3616 8490 3610 8483 3609 8481 3618 8521
      3653 8500 3652 8472 3643 8469 3641 8466
TIME...MOT...LOC 2149Z 267DEG 54KT 3643 8484 3624 8497

$$

TNC035-049-133-292215-
/O.CON.KOHX.SV.W.0022.000000T0000Z-120229T2215Z/
OVERTON TN-CUMBERLAND TN-FENTRESS TN-
349 PM CST WED FEB 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FENTRESS...
NORTH CENTRAL CUMBERLAND AND SOUTHEASTERN OVERTON COUNTIES UNTIL 415
PM CST...

AT 347 PM CST...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM JAMESTOWN TO 14 MILES SOUTH OF JAMESTOWN...MOVING EAST AT 60
MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN FENTRESS AND NORTHERN CUMBERLAND
  COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3636 8470 3637 8473 3634 8473 3633 8477
      3629 8479 3629 8487 3624 8487 3621 8491
      3616 8490 3610 8483 3609 8481 3618 8521
      3653 8500 3652 8472 3643 8469 3641 8466
TIME...MOT...LOC 2149Z 267DEG 54KT 3643 8484 3624 8497

$$

SHAMBURGER

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 29, 10:35 AM CSTSpecial Weather StatementOHXStewart55 min
Feb 29, 11:26 AM CSTTornado WarningOHXHouston, Montgomery, Stewart34 min
Feb 29, 2:40 PM CSTSpecial Weather StatementOHXPickett35 min
Feb 29, 3:04 PM CSTSevere Thunderstorm WarningOHXJackson, Overton, Putnam, Smith26 min
Feb 29, 3:33 PM CSTSevere Thunderstorm WarningOHXCannon, DeKalb, Putnam, Smith, White, Wilson27 min
Feb 29, 3:38 PM CSTSevere Thunderstorm WarningOHXCannon, DeKalb, Putnam, Rutherford, Smith, White and 1 more37 min
Feb 29, 3:46 PM CSTTornado WarningOHXDeKalb, Putnam, White29 min
Feb 29, 4:09 PM CSTTornado WarningOHXCumberland, Fentress, Overton, Putnam, White36 min
Feb 29, 5:14 PM CSTSevere Thunderstorm WarningOHXGrundy16 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012Every severe thunderstorm warning in 2012

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.