Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 101, NWS Morristown, TN

April 5, 2012Cocke County, Greene County, Hawkins County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 5, 2012, 3:55 PM EDT for Cocke County, Greene County, Hawkins County, Tennessee. It was in force for 50 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: Apr 5, 2012, 3:55 PM EDT (19:55 UTC)
Expired: Apr 5, 2012, 4:45 PM EDT
In force: 50 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Cocke County, TN, Greene County, TN, Hawkins County, TN

The radar

The Knoxville radar (KMRX), 27 km from the middle of the area, began a volume at 19:57 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
Apr 5, 4:06 PM EDT	TSTM WND DMG	3 Nw Baileyton, TN	POWERLINES DOWN ON HORTON HIGHWAY.

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
Apr 5, 2:21 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.9 hours before the alert went out and 288 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: 1169 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 192 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.

201 
WUUS54 KMRX 051955
SVRMRX
TNC029-059-073-052045-
/O.NEW.KMRX.SV.W.0101.120405T1955Z-120405T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
355 PM EDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN COCKE COUNTY IN EAST TENNESSEE...
  WESTERN GREENE COUNTY IN EAST TENNESSEE...
  SOUTHEAST HAWKINS COUNTY IN EAST TENNESSEE...

* UNTIL 445 PM EDT

* AT 351 PM EDT...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 STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF
  ROGERSVILLE TO 10 MILES EAST OF RUSSELLVILLE TO 7 MILES NORTHWEST
  OF PARROTTSVILLE...AND MOVING EAST AT 10 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  PARROTTSVILLE...ROMEO...MOSHEIM...JEAROLDSTOWN...BAILEYTON AND
  CANEY BRANCH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT 
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND MOST OF EAST 
TENNESSEE.

&&

LAT...LON 3635 8267 3595 8302 3602 8326 3605 8324
      3608 8326 3609 8323 3612 8325 3612 8322
      3615 8322 3613 8317 3617 8319 3624 8308
      3629 8312 3643 8299
TIME...MOT...LOC 1953Z 289DEG 8KT 3632 8293 3620 8302
          3608 8316

$$

TG

1 follow-up statement

720 
WWUS54 KMRX 052018
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
418 PM EDT THU APR 5 2012

TNC029-073-052027-
/O.CAN.KMRX.SV.W.0101.000000T0000Z-120405T2045Z/
HAWKINS TN-COCKE TN-
418 PM EDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN COCKE AND SOUTHEAST 
HAWKINS COUNTIES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT 
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND MOST OF EAST 
TENNESSEE.

LAT...LON 3610 8308 3622 8299 3638 8278 3635 8267
      3603 8295
TIME...MOT...LOC 2017Z 289DEG 8KT 3632 8278 3624 8285
          3614 8292

$$

TNC059-052045-
/O.CON.KMRX.SV.W.0101.000000T0000Z-120405T2045Z/
GREENE TN-
418 PM EDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR GREENE COUNTY...

AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF 
PRODUCING UP TO QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 
BAILEYTON TO 6 MILES SOUTH OF BAILEYTON TO MOSHEIM...OR ALONG A LINE 
EXTENDING FROM 11 MILES NORTH OF GREENEVILLE TO 6 MILES NORTH OF 
GREENEVILLE TO 6 MILES WEST OF GREENEVILLE...MOVING EAST AT 10 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MAINLY RURAL AREAS OF GREENE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES PRIMARY KILLERS ASSOCIATED
WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT 
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND MOST OF EAST 
TENNESSEE.

&&

LAT...LON 3610 8308 3622 8299 3638 8278 3635 8267
      3603 8295
TIME...MOT...LOC 2017Z 289DEG 8KT 3632 8278 3624 8285
          3614 8292

$$

TG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 12:51 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell	39 min
Apr 5, 1:40 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Union	50 min
Apr 5, 2:09 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	21 min
Apr 5, 3:00 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	30 min
Apr 5, 3:22 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hamblen, Hawkins	38 min
Apr 5, 3:52 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	23 min
Apr 5, 4:21 PM EDT	Flash Flood Warning	MRX	Morgan, Roane	56 min
Apr 5, 4:30 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Unicoi, Washington	45 min
Apr 5, 4:39 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Sequatchie	51 min
Apr 5, 5:15 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Unicoi, Washington	14 min
Apr 5, 5:34 PM EDT	Areal Flood Advisory	MRX	Washington	56 min
Apr 5, 5:44 PM EDT	Areal Flood Advisory	MRX	Bledsoe, Hamilton, Sequatchie	2 hr
Apr 5, 6:58 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	47 min
Apr 5, 7:03 PM EDT	Areal Flood Advisory	MRX	Rhea, Roane	3 hr
Apr 5, 7:30 PM EDT	Areal Flood Advisory	MRX	Carter, Greene, Unicoi, Washington	2 hr
Apr 5, 7:32 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon	28 min
Apr 5, 7:52 PM EDT	Areal Flood Advisory	MRX	Blount, Knox, Loudon	3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.