Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 7, NWS Nashville, TN

January 23, 20129 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 23, 2012, 12:28 AM CST for 9 counties in Tennessee. It was in force for 47 min. 11 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: Jan 23, 2012, 12:28 AM CST (06:28 UTC)
Expired: Jan 23, 2012, 1:15 AM CST
In force: 47 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cheatham County, TN, Davidson County, TN, Dickson County, TN, Houston County, TN, Humphreys County, TN, Montgomery County, TN, Robertson County, TN, Sumner County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 11 km from the middle of the area, began a volume at 06:30 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, 12:30 AM CST	TSTM WND DMG	Clarksville, TN	PUBLIC REPORT OF CAR PORT DESTROYED. 950 GARRETTSBURG ROAD IN CLARKSVILLE, TN.
Jan 23, 12:35 AM CST	TSTM WND DMG	Clarksville, TN	A FEW TREES AND POWER LINES WERE DOWNED ACROSS THE COUNTY.
Jan 23, 12:39 AM CST	TSTM WND DMG	Dickson, TN	IN A FIELD BEHIND A RESIDENCE ON EAST HUMPHRIES COUNTY LINE ROAD IN DICKSON...ONE THIRTY FOOT TREE SNAPPED ALOFT AND ANOTHER THRITY FOOT TREE UPROOTED...ALONG WITH A FEW SMALLER TREES IN THE VICINITY UPROOTED.
Jan 23, 12:39 AM CST	TORNADO	Dickson, TN	PUBLIC REPORT OF POSSIBLE TORNADO IN THE CITY OF DICKSON.
Jan 23, 12:46 AM CST	TSTM WND GST 58	18 S Clarksville, TN	AMATEUR RADIO REPORTS MEASURED 58 MPH WIND GUST 18 M S OF CLARKSVILLE.
Jan 23, 12:50 AM CST	TSTM WND GST 60	7 Ne Dickson, TN	TRAINED SPOTTER REPORTED ESTIMATED 60 MPH GUST 1 MILE NORTH OF MM 163 ON I40
Jan 23, 1:03 AM CST	FUNNEL CLOUD	Dickson, TN	PUBLIC REPORT OF FUNNEL CLOUD
Jan 23, 1:08 AM CST	TSTM WND DMG	8 W Dickson, TN	AMATUER RADIO OPERATOR REPORTS TREES DOWN NEAR HWY 70 AT TENNESSEE CITY. HWY 48 N AND STEELE RD.
Jan 23, 1:14 AM CST	TSTM WND DMG	Dickson, TN	AMATUER RADIO REPORTS TREES FALLEN ON UPS TRUCK. DRIVER OK. MM 161 EASTBOUND I40.
Jan 23, 1:16 AM CST	TSTM WND DMG	5 N Dickson, TN	AMATUER RADIO OPERATOR REPORTS MULTIPLE TREES DOWN AND POWER LINES BLOCKING THE ROAD ON HWY 48 N SPANNING FROM DICKSON TO CHARLOTTE.
Jan 23, 1:20 AM CST	TSTM WND DMG	2 E White House, TN	TRAINED SPOTTER REPORTS TREES DOWN 2 M EAST OF WHITEHOUSE AT COVINGTON AND CROSS PLAINS RD.

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, 6.5 hours before the alert went out and 16 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.

050 
WUUS54 KOHX 230628
SVROHX
TNC021-037-043-083-085-125-147-165-187-230715-
/O.NEW.KOHX.SV.W.0007.120123T0628Z-120123T0715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1228 AM CST MON JAN 23 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ROBERTSON COUNTY IN MIDDLE TENNESSEE...
  SUMNER COUNTY IN MIDDLE TENNESSEE...
  NORTHERN WILLIAMSON COUNTY IN MIDDLE TENNESSEE...
  DICKSON COUNTY IN MIDDLE TENNESSEE...
  CHEATHAM COUNTY IN MIDDLE TENNESSEE...
  DAVIDSON COUNTY IN MIDDLE TENNESSEE...
  SOUTHEASTERN HOUSTON COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL HUMPHREYS COUNTY IN MIDDLE TENNESSEE...
  EASTERN MONTGOMERY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 115 AM CST

* AT 1226 AM CST 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 GUTHRIE TO WAVERLY...AND WERE MOVING EAST AT 70 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DICKSON...
  WHITE BLUFF...
  KINGSTON SPRINGS...
  FAIRVIEW...
  WHITE HOUSE...
  OAK HILL...
  LAKEWOOD...
  WESTMORELAND...

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.

&&

LAT...LON 3664 8620 3650 8622 3632 8633 3631 8636
      3634 8634 3636 8637 3631 8640 3634 8644
      3628 8653 3632 8654 3631 8657 3623 8659
      3610 8651 3601 8662 3595 8664 3595 8720
      3599 8752 3595 8756 3595 8787 3665 8729
TIME...MOT...LOC 0628Z 270DEG 63KT 3669 8713 3602 8768

$$

FORECASTER:BOYD

1 follow-up statement

024 
WWUS54 KOHX 230705
SVSOHX

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

TNC083-085-125-230714-
/O.CAN.KOHX.SV.W.0007.000000T0000Z-120123T0715Z/
HOUSTON TN-HUMPHREYS TN-MONTGOMERY TN-
105 AM CST MON JAN 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MONTGOMERY...EAST
CENTRAL HUMPHREYS AND SOUTHEASTERN HOUSTON COUNTIES IS CANCELLED...

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

LAT...LON 3664 8620 3650 8622 3632 8633 3631 8636
      3634 8634 3636 8637 3631 8640 3634 8644
      3628 8653 3632 8654 3631 8657 3623 8659
      3610 8651 3601 8662 3595 8664 3595 8720
      3601 8737 3599 8745 3601 8751 3665 8696
TIME...MOT...LOC 0704Z 270DEG 63KT 3667 8634 3601 8691

$$

TNC021-037-043-147-165-187-230715-
/O.CON.KOHX.SV.W.0007.000000T0000Z-120123T0715Z/
ROBERTSON TN-SUMNER TN-WILLIAMSON TN-DICKSON TN-CHEATHAM TN-
DAVIDSON TN-
105 AM CST MON JAN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DAVIDSON...
CHEATHAM...SOUTHEASTERN DICKSON...NORTHERN WILLIAMSON...SUMNER AND
ROBERTSON COUNTIES UNTIL 115 AM CST...

AT 1258 AM 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 STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF PORTLAND TO
5 MILES EAST OF FAIRVIEW...MOVING EAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  GALLATIN...HENDERSONVILLE...OAK HILL...LAKEWOOD...BRENTWOOD...
  WESTMORELAND AND BERRY HILL.

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 3664 8620 3650 8622 3632 8633 3631 8636
      3634 8634 3636 8637 3631 8640 3634 8644
      3628 8653 3632 8654 3631 8657 3623 8659
      3610 8651 3601 8662 3595 8664 3595 8720
      3601 8737 3599 8745 3601 8751 3665 8696
TIME...MOT...LOC 0704Z 270DEG 63KT 3667 8634 3601 8691

$$

BOYD

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, 12:40 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, 2:17 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Coffee	28 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.