Alert archive / Tennessee / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 21, NWS Morristown, TN

April 1, 2005Marion County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 1, 2005, 4:33 PM CST for Marion County, Sequatchie County, Tennessee. It was in force for 75 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
Apr 1, 2005, 4:33 PM CST (22:33 UTC)
Expired
Apr 1, 2005, 5:48 PM CST
In force
75 min
Issued by
NWS Morristown, TN
Area
Counties, with a storm outline in the text

Counties Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 65 km from the middle of the area, began a volume at 22:32 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.

IssuedProductOfficeLasted
Apr 1, 11:45 AM CSTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.6 hours before the alert went out and 140 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 12:00Z on 2005-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2005-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2127 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
226 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.

000 
WUUS54 KMRX 012234
SVRMRX
TNC115-153-012245-
/O.NEW.KMRX.SV.W.0021.050401T2233Z-050401T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
433 PM CST FRI APR 1 2005

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARION COUNTY IN EAST TENNESSEE
  THIS INCLUDES THE CITY OF JASPER
  SOUTHERN SEQUATCHIE COUNTY IN EAST TENNESSEE
  THIS INCLUDES THE CITY OF DUNLAP

* UNTIL 445 PM CST

* AT 428 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM DUNLAP TO SOUTH PITTSBURG...OR
  ALONG A LINE EXTENDING FROM DUNLAP TO JASPER...AND MOVING EAST     
  AT 40 MPH.  THIS EXTENDS THE PREVIOUS SEVERE THUNDERSTORM WARNING  
  FOR MARION AND SEQUATCHIE COUNTIES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PRENTICE COOPER STATE FOREST...LONE OAK AND HALETOWN (GUILD) BY 440
  PM CST

LAT...LON 3546 8545 3496 8583 3500 8546 3539 8522

$$

TG
1 follow-up statement
000 
WWUS54 KMRX 012248
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
546 PM EST FRI APR 1 2005

TNC115-153-012256-
/O.EXP.KMRX.SV.W.0021.000000T0000Z-050401T2245Z/
SEQUATCHIE TN-MARION TN-
446 PM CST FRI APR 1 2005

...THE SEVERE THUNDERSTORM WARNING FOR MARION AND SEQUATCHIE COUNTIES
HAS EXPIRED AT 445 PM CST...

THE STORMS THAT PROMPTED THE WARNING HAD WEAKENED BELOW SEVERE 
LEVELS...AS THEY MOVED EAST ACROSS EASTERN MOST PARTS OF MARION AND 
SEQUATCHIE COUNTIES TOWARD HAMILTON COUNTY.  THEREFORE...THE WARNING 
HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3546 8545 3496 8583 3500 8546 3539 8522

$$

TG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 3:45 PM CSTSevere Thunderstorm WarningMRXMarion, Sequatchie45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2005Every severe thunderstorm warning in 2005

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.