Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 331, NWS Morristown, TN

July 4, 2011Bledsoe County, Rhea County, Roane County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 4, 2011, 11:53 AM CDT for Bledsoe County, Rhea County, Roane County, Tennessee. It was in force for 67 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 4, 2011, 11:53 AM CDT (16:53 UTC)
Expired
Jul 4, 2011, 1:00 PM CDT
In force
67 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Bledsoe County, TN, Rhea County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 136 km from the middle of the area, began a volume at 16:52 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
Jul 4, 11:50 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 4.9 hours before the alert went out and 165 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 2011-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2292 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2011-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939Sfc1 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
2292 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
70 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.

914 
WUUS54 KMRX 041653
SVRMRX
TNC007-143-145-041800-
/O.NEW.KMRX.SV.W.0331.110704T1653Z-110704T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1253 PM EDT MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLEDSOE COUNTY IN EAST TENNESSEE...
  RHEA COUNTY IN EAST TENNESSEE...
  ROANE COUNTY IN EAST TENNESSEE...

* UNTIL 200 PM EDT/100 PM CDT/

* AT 1146 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
  WEST OF SPRING CITY...OR 13 MILES NORTHEAST OF PIKEVILLE...AND
  MOVING EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ROCKWOOD...KINGSTON...SPRING CITY...GRANDVIEW...EAGLE FURNACE AND
  FAIRVIEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING/700 PM CDT MONDAY EVENING/ FOR CENTRAL TENNESSEE AND
SOUTHWEST VIRGINIA.

&&

LAT...LON 3578 8512 3578 8504 3576 8503 3577 8491
      3583 8477 3591 8470 3594 8461 3581 8443
      3571 8467 3574 8471 3569 8472 3568 8475
      3570 8476 3567 8478 3553 8512
TIME...MOT...LOC 1653Z 248DEG 12KT 3573 8498

$$

MJB
1 follow-up statement
877 
WWUS54 KMRX 041726
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
126 PM EDT MON JUL 4 2011

TNC007-143-145-041800-
/O.CON.KMRX.SV.W.0331.000000T0000Z-110704T1800Z/
RHEA TN-ROANE TN-BLEDSOE TN-
126 PM EDT MON JUL 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM
EDT/100 PM CDT/ FOR BLEDSOE...ROANE AND RHEA COUNTIES...

AT 121 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR GRANDVIEW...OR 12 MILES SOUTHWEST OF ROCKWOOD...MOVING
EAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ROCKWOOD...KINGSTON...EAGLE FURNACE AND FAIRVIEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING/700 PM CDT MONDAY EVENING/ FOR CENTRAL TENNESSEE AND
SOUTHWEST VIRGINIA.

&&

LAT...LON 3578 8512 3578 8504 3576 8503 3577 8491
      3583 8477 3591 8470 3594 8461 3581 8443
      3571 8467 3574 8471 3569 8472 3568 8475
      3570 8476 3567 8478 3553 8512
TIME...MOT...LOC 1726Z 248DEG 12KT 3575 8480

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 12:54 PM CDTSevere Thunderstorm WarningMRXLoudon, Morgan, Roane66 min
Jul 4, 1:40 PM CDTSevere Thunderstorm WarningMRXBlount, Loudon, Monroe65 min
Jul 4, 1:44 PM CDTSevere Thunderstorm WarningMRXCarter, Johnson31 min
Jul 4, 2:07 PM CDTSevere Thunderstorm WarningMRXBradley, McMinn, Polk38 min
Jul 4, 2:08 PM CDTSevere Thunderstorm WarningMRXSullivan31 min
Jul 4, 2:15 PM CDTSevere Thunderstorm WarningMRXCarter, Johnson60 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011Every severe thunderstorm warning in 2011

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.