Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Nashville, TN

February 24, 20116 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 24, 2011, 10:37 PM CST for 6 counties in Tennessee. It was in force for 23 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: Feb 24, 2011, 10:37 PM CST (04:37 UTC)
Expired: Feb 24, 2011, 11:00 PM CST
In force: 23 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Cannon County, TN, Coffee County, TN, Marshall County, TN, Maury County, TN, Rutherford County, TN

The radar

The Nashville radar (KOHX), 78 km from the middle of the area, began a volume at 04:38 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 24, 7:41 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.6 hours before the alert went out and 65 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: 17 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 538 m²/s²
0-3 km storm-relative helicity: 629 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

550 
WUUS54 KOHX 250437
SVROHX
TNC003-015-031-117-119-149-250500-
/O.NEW.KOHX.SV.W.0009.110225T0437Z-110225T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1037 PM CST THU FEB 24 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MAURY COUNTY IN MIDDLE TENNESSEE...
  CANNON COUNTY IN MIDDLE TENNESSEE...
  RUTHERFORD COUNTY IN MIDDLE TENNESSEE...
  MARSHALL COUNTY IN MIDDLE TENNESSEE...
  NORTHWESTERN COFFEE COUNTY IN MIDDLE TENNESSEE...
  BEDFORD COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1100 PM CST

* AT 1034 PM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THESE SEVERE STORMS EXTENDED FROM WALTERHILL TO
  CORNERSVILLE...AND WERE MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WOODBURY...

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 100 AM FRIDAY MORNING FOR
CENTRAL TENNESSEE.

&&

LAT...LON 3532 8682 3531 8686 3533 8690 3542 8692
      3543 8701 3544 8701 3601 8635 3596 8618
      3596 8610 3598 8609 3596 8601 3585 8588
      3573 8598 3533 8645 3536 8649 3537 8658
      3534 8660 3527 8673 3526 8680
TIME...MOT...LOC 0437Z 299DEG 26KT 3597 8623 3541 8689

$$

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 7:22 PM CST	Tornado Warning	OHX	Stewart	24 min
Feb 24, 8:24 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Stewart	36 min
Feb 24, 8:30 PM CST	Tornado Warning	OHX	Perry	30 min
Feb 24, 8:30 PM CST	Tornado Warning	OHX	Benton, Houston, Humphreys, Stewart	30 min
Feb 24, 8:54 PM CST	Tornado Warning	OHX	Hickman	36 min
Feb 24, 8:58 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more	63 min
Feb 24, 9:00 PM CST	Severe Thunderstorm Warning	OHX	Lewis, Wayne	45 min
Feb 24, 9:00 PM CST	Tornado Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery	30 min
Feb 24, 9:12 PM CST	Tornado Warning	OHX	Dickson, Humphreys	33 min
Feb 24, 9:20 PM CST	Tornado Warning	OHX	Montgomery, Robertson, Sumner	25 min
Feb 24, 9:26 PM CST	Severe Thunderstorm Warning	OHX	Maury, Williamson	34 min
Feb 24, 9:30 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Macon, Montgomery, Robertson and 3 more	60 min
Feb 24, 9:34 PM CST	Tornado Warning	OHX	Cheatham, Davidson, Williamson	26 min
Feb 24, 9:46 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	59 min
Feb 24, 9:58 PM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Wayne	62 min
Feb 24, 10:02 PM CST	Tornado Warning Emergency	OHX	Davidson, Rutherford, Wilson	28 min
Feb 24, 10:08 PM CST	Tornado Warning	OHX	Davidson, Macon, Smith, Sumner, Trousdale, Wilson	37 min
Feb 24, 10:17 PM CST	Tornado Warning	OHX	Macon, Sumner, Trousdale	43 min
Feb 24, 10:26 PM CST	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Macon, Overton, Pickett and 5 more	79 min
Feb 24, 10:27 PM CST	Flash Flood Warning	OHX	Stewart	3 hr
Feb 24, 10:36 PM CST	Tornado Warning	OHX	Clay, Jackson, Macon	24 min
Feb 24, 10:39 PM CST	Tornado Warning	OHX	Clay, Fentress, Jackson, Macon, Overton, Pickett and 2 more	36 min
Feb 24, 10:45 PM CST	Severe Thunderstorm Warning	OHX	DeKalb	30 min
Feb 24, 11:03 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Marshall, Rutherford, Warren	42 min
Feb 24, 11:14 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, White	31 min
Feb 24, 11:31 PM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	44 min
Feb 24, 11:34 PM CST	Severe Thunderstorm Warning	OHX	Cumberland	41 min
Feb 24, 11:40 PM CST	Severe Thunderstorm Warning	OHX	White	35 min
Feb 24, 11:40 PM CST	Severe Thunderstorm Warning	OHX	Fentress, Overton, Pickett, Putnam	50 min
Feb 25, 12:07 AM CST	Severe Thunderstorm Warning	OHX	Cumberland	23 min
Feb 25, 1:25 AM CST	River Flood Warning	OHX	Bedford	6 days

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.