Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Nashville, TN

January 23, 2012Bedford County, Coffee County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 23, 2012, 2:17 AM CST for Bedford County, Coffee County, Tennessee. It was in force for 28 min. 1 report 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: Jan 23, 2012, 2:17 AM CST (08:17 UTC)
Expired: Jan 23, 2012, 2:45 AM CST
In force: 28 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Coffee County, TN

The radar

The Nashville radar (KOHX), 74 km from the middle of the area, began a volume at 08:20 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
Jan 23, 2:30 AM CST	TSTM WND DMG	Wartrace, TN	A TREE WAS REPORTED DOWNED ON HIGHWAY 64 EAST...COMING FROM THE I-24 WARTRACE AREA.

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
Jan 22, 10:59 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 8.3 hours before the alert went out and 61 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: 517 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 337 m²/s²
0-3 km storm-relative helicity: 371 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

837 
WUUS54 KOHX 230817
SVROHX
TNC003-031-230845-
/O.NEW.KOHX.SV.W.0013.120123T0817Z-120123T0845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
217 AM CST MON JAN 23 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BEDFORD COUNTY IN MIDDLE TENNESSEE...
  WEST CENTRAL COFFEE COUNTY IN MIDDLE TENNESSEE...

* UNTIL 245 AM CST

* AT 217 AM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. THE STORM WAS NEAR CHAPEL HILL...MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHELBYVILLE...

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 600 AM MONDAY MORNING FOR
CENTRAL TENNESSEE. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT
UNTIL 900 AM MONDAY MORNING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3546 8666 3556 8666 3558 8664 3558 8665
      3566 8664 3565 8647 3564 8646 3565 8642
      3562 8641 3563 8639 3565 8637 3564 8626
      3563 8625 3564 8624 3564 8611 3541 8613
TIME...MOT...LOC 0817Z 274DEG 31KT 3555 8657

$$

FORECASTER: 31

1 follow-up statement

254 
WWUS54 KOHX 230833
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
233 AM CST MON JAN 23 2012

TNC003-031-230845-
/O.CON.KOHX.SV.W.0013.000000T0000Z-120123T0845Z/
BEDFORD TN-COFFEE TN-
233 AM CST MON JAN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
COFFEE AND EAST CENTRAL BEDFORD COUNTIES UNTIL 245 AM CST...

AT 232 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED NEAR SHELBYVILLE...MOVING EAST AT 35
MPH.

LOCATIONS IMPACTED INCLUDE...
  BELL BUCKLE...WARTRACE AND NORMANDY.

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 3545 8646 3562 8641 3563 8639 3565 8637
      3564 8626 3563 8625 3564 8624 3564 8611
      3541 8613
TIME...MOT...LOC 0832Z 274DEG 31KT 3554 8641

$$
31

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 11:23 PM CST	Severe Thunderstorm Warning	OHX	Stewart	7 min
Jan 22, 11:40 PM CST	Special Weather Statement	OHX	Cheatham, Dickson, Giles, Hickman, Houston, Humphreys and 7 more	50 min
Jan 22, 11:53 PM CST	Tornado Warning	OHX	Wayne	37 min
Jan 22, 11:56 PM CST	Special Weather Statement	OHX	Cheatham, Dickson, Giles, Hickman, Houston, Humphreys and 7 more	64 min
Jan 23, 12:17 AM CST	Severe Thunderstorm Warning	OHX	Benton, Dickson, Houston, Humphreys	43 min
Jan 23, 12:25 AM CST	Tornado Warning	OHX	Hickman, Lawrence, Lewis, Maury, Perry, Wayne	20 min
Jan 23, 12:28 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 3 more	47 min
Jan 23, 12:40 AM CST	Special Weather Statement	OHX	Cheatham, Davidson, Dickson, Giles, Hickman, Lawrence and 12 more	50 min
Jan 23, 12:40 AM CST	Tornado Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery	35 min
Jan 23, 12:53 AM CST	Tornado Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	37 min
Jan 23, 12:55 AM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Marshall, Maury	15 min
Jan 23, 1:13 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, DeKalb, Dickson, Macon, Robertson and 5 more	32 min
Jan 23, 1:21 AM CST	Tornado Warning	OHX	Cheatham, Davidson, Robertson, Sumner, Williamson	39 min
Jan 23, 1:35 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	25 min
Jan 23, 1:37 AM CST	Tornado Warning	OHX	Davidson, Sumner, Williamson, Wilson	23 min
Jan 23, 1:41 AM CST	Severe Thunderstorm Warning	OHX	Clay, Davidson, Jackson, Macon, Smith, Sumner and 3 more	34 min
Jan 23, 2:09 AM CST	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Putnam, Rutherford and 3 more	36 min
Jan 23, 2:46 AM CST	Severe Thunderstorm Warning	OHX	Clay, Cumberland, DeKalb, Fentress, Jackson, Overton and 3 more	59 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every 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.