Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 270, NWS Nashville, TN

July 18, 2012Cannon County, Warren County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 18, 2012, 1:21 PM CDT for Cannon County, Warren County, Tennessee. It was in force for 39 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: Jul 18, 2012, 1:21 PM CDT (18:21 UTC)
Expired: Jul 18, 2012, 2:00 PM CDT
In force: 39 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cannon County, TN, Warren County, TN

The radar

The Nashville radar (KOHX), 79 km from the middle of the area, began a volume at 18:21 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.4 hours before the alert went out and 74 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: 2917 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 858 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 63 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.

776 
WUUS54 KOHX 181821
SVROHX
TNC015-177-181900-
/O.NEW.KOHX.SV.W.0270.120718T1821Z-120718T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
121 PM CDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WARREN COUNTY IN MIDDLE TENNESSEE...
  EASTERN CANNON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 200 PM CDT

* AT 116 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR WOODBURY...
  MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CENTERTOWN...

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.

&&

LAT...LON 3559 8593 3582 8611 3593 8597 3587 8590
      3584 8589 3585 8585 3584 8584 3585 8581
      3576 8567
TIME...MOT...LOC 1821Z 317DEG 7KT 3581 8595

$$

SHAMBURGER

2 follow-up statements

069 
WWUS54 KOHX 181839
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
139 PM CDT WED JUL 18 2012

TNC015-177-181900-
/O.CON.KOHX.SV.W.0270.000000T0000Z-120718T1900Z/
WARREN TN-CANNON TN-
139 PM CDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
CANNON AND NORTHERN WARREN COUNTIES UNTIL 200 PM CDT...

AT 136 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 9 MILES NORTHWEST OF MCMINNVILLE...
MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  CENTERTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3582 8611 3593 8597 3587 8590 3584 8589
      3585 8586 3584 8584 3585 8581 3576 8567
      3564 8586
TIME...MOT...LOC 1839Z 317DEG 7KT 3579 8586

$$

SHAMBURGER

934 
WWUS54 KOHX 181849
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
149 PM CDT WED JUL 18 2012

TNC015-181859-
/O.CAN.KOHX.SV.W.0270.000000T0000Z-120718T1900Z/
CANNON TN-
149 PM CDT WED JUL 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CANNON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3573 8599 3577 8595 3582 8592 3583 8589
      3585 8587 3584 8584 3585 8581 3576 8567
      3570 8576
TIME...MOT...LOC 1849Z 296DEG 11KT 3578 8575

$$

TNC177-181900-
/O.CON.KOHX.SV.W.0270.000000T0000Z-120718T1900Z/
WARREN TN-
149 PM CDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
WARREN COUNTY UNTIL 200 PM CDT...

AT 146 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 7 MILES NORTH OF MCMINNVILLE...MOVING
SOUTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN WARREN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3573 8599 3577 8595 3582 8592 3583 8589
      3585 8587 3584 8584 3585 8581 3576 8567
      3570 8576
TIME...MOT...LOC 1849Z 296DEG 11KT 3578 8575

$$

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 11:04 AM CDT	Special Weather Statement	OHX	Cumberland	41 min
Jul 18, 11:27 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland	33 min
Jul 18, 11:54 AM CDT	Areal Flood Advisory	OHX	Cumberland	111 min
Jul 18, 12:29 PM CDT	Special Weather Statement	OHX	DeKalb	46 min
Jul 18, 1:22 PM CDT	Severe Thunderstorm Warning	OHX	Coffee	38 min
Jul 18, 1:40 PM CDT	Special Weather Statement	OHX	Bedford	50 min
Jul 18, 1:59 PM CDT	Areal Flood Advisory	OHX	Coffee	2 hr
Jul 18, 2:02 PM CDT	Special Weather Statement	OHX	Grundy	58 min
Jul 18, 2:25 PM CDT	Special Weather Statement	OHX	Wilson	50 min
Jul 18, 2:29 PM CDT	Special Weather Statement	OHX	Overton	61 min
Jul 18, 2:59 PM CDT	Severe Thunderstorm Warning	OHX	Overton, Pickett	31 min
Jul 18, 3:27 PM CDT	Special Weather Statement	OHX	Putnam	48 min
Jul 18, 3:37 PM CDT	Special Weather Statement	OHX	Robertson, Sumner	38 min
Jul 18, 3:41 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner	49 min
Jul 18, 4:03 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	27 min
Jul 18, 4:14 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	31 min
Jul 18, 4:17 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson	28 min
Jul 18, 4:41 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Houston, Montgomery, Robertson, Stewart	34 min
Jul 18, 4:50 PM CDT	Special Weather Statement	OHX	Lawrence	25 min
Jul 18, 4:56 PM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	3 hr
Jul 18, 5:09 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	36 min
Jul 18, 5:28 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman	32 min
Jul 18, 5:47 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson	16 min
Jul 18, 5:51 PM CDT	Special Weather Statement	OHX	Humphreys	24 min
Jul 18, 5:56 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys	34 min
Jul 18, 6:00 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman	30 min
Jul 18, 6:29 PM CDT	Special Weather Statement	OHX	Benton, Hickman, Humphreys	31 min
Jul 18, 6:39 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys	36 min
Jul 18, 6:49 PM CDT	Flash Flood Warning	OHX	Hickman, Humphreys, Perry	2 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.