Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 367, NWS Nashville, TN

September 8, 20125 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Sep 8, 2012, 12:01 AM CDT for 5 counties in Tennessee. It was in force for 29 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
Sep 8, 2012, 12:01 AM CDT (05:01 UTC)
Expired
Sep 8, 2012, 12:30 AM CDT
In force
29 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon

Counties Dickson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Perry County, TN

What was reported inside it

TimeReportWhereRemark
Sep 8, 12:25 AM CDTTSTM WND DMG4 Wsw Dickson, TNDEPUTY FOUND LARGE TREE LIMB DOWN BLOCKING ROADWAY

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
Sep 7, 8:10 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 5.0 hours before the alert went out and 88 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 00:00Z on 2012-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2335 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2012-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.193958Sfc1 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
2335 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
44 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.

854 
WUUS54 KOHX 080501
SVROHX
TNC043-081-083-085-135-080530-
/O.NEW.KOHX.SV.W.0367.120908T0501Z-120908T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1201 AM CDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN PERRY COUNTY IN MIDDLE TENNESSEE...
  DICKSON COUNTY IN MIDDLE TENNESSEE...
  NORTHERN HICKMAN COUNTY IN MIDDLE TENNESSEE...
  SOUTHERN HOUSTON COUNTY IN MIDDLE TENNESSEE...
  HUMPHREYS COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1230 AM CDT

* AT 1157 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH. THESE SEVERE STORMS EXTENDED FROM 10 MILES    
  NORTHWEST OF WAVERLY...TO WAVERLY...TO LOBELVILLE...AND WERE       
  MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DICKSON...
  BURNS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS LINE OF SEVERE
THUNDERSTORMS...WHICH COULD FLOOD LOW LYING AREAS QUICKLY AND COVER
ROADS WITH WATER. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

&&

LAT...LON 3626 8734 3599 8720 3575 8739 3575 8798
      3600 8780 3626 8794
TIME...MOT...LOC 0501Z 270DEG 46KT 3618 8776 3600 8766
          3583 8779

$$

FORECASTER: ROSE
1 follow-up statement
503 
WWUS54 KOHX 080523
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1223 AM CDT SAT SEP 8 2012

TNC043-081-083-085-135-080530-
/O.CON.KOHX.SV.W.0367.000000T0000Z-120908T0530Z/
PERRY TN-DICKSON TN-HICKMAN TN-HOUSTON TN-HUMPHREYS TN-
1223 AM CDT SAT SEP 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR HUMPHREYS...
SOUTHERN HOUSTON...NORTHERN HICKMAN...DICKSON AND NORTHERN PERRY
COUNTIES UNTIL 1230 AM CDT...

AT 1220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 8 MILES NORTHWEST OF DICKSON TO BURNS TO
CENTERVILLE...MOVING EAST AT 55 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3626 8734 3599 8720 3575 8739 3575 8798
      3600 8780 3626 8794
TIME...MOT...LOC 0523Z 270DEG 46KT 3618 8741 3600 8731
          3583 8744

$$

ROSE

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 10:32 PM CDTSevere Thunderstorm WarningOHXBenton, Houston, Humphreys, Montgomery, Stewart58 min
Sep 7, 11:24 PM CDTSevere Thunderstorm WarningOHXMontgomery, Stewart51 min
Sep 8, 12:28 AM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Dickson, Hickman, Williamson32 min
Sep 8, 1:00 AM CDTSpecial Weather StatementOHXDavidson30 min
Sep 8, 1:28 AM CDTSpecial Weather StatementOHXMacon, Trousdale, Wilson32 min
Sep 8, 2:01 AM CDTSpecial Weather StatementOHXClay, Jackson, Macon, Smith29 min
Sep 8, 2:29 AM CDTSpecial Weather StatementOHXClay, Jackson, Overton, Putnam31 min
Sep 8, 3:03 AM CDTSpecial Weather StatementOHXFentress, Overton, Pickett, Putnam42 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.