Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 10, NWS Morristown, TN

April 4, 2011Morgan County, Scott County, Tennessee

NWS Morristown, TN issued this tornado warning at Apr 4, 2011, 4:48 PM EDT for Morgan County, Scott County, Tennessee. It was in force for 42 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 4, 2011, 4:48 PM EDT (20:48 UTC)
Expired: Apr 4, 2011, 5:30 PM EDT
In force: 42 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Morgan County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 99 km from the middle of the area, began a volume at 20:47 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 4, 5:00 PM EDT	TSTM WND DMG	Oneida, TN	TREES AND POWER LINES DOWN.

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 4, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.8 hours before the alert went out and 196 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: 68 J/kg
Mixed-layer CIN: -640 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 507 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.

661 
WFUS54 KMRX 042048
TORMRX
TNC129-151-042130-
/O.NEW.KMRX.TO.W.0010.110404T2048Z-110404T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
448 PM EDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHERN MORGAN COUNTY IN EAST TENNESSEE...
  SCOTT COUNTY IN EAST TENNESSEE...

* UNTIL 530 PM EDT

* AT 442 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHEAST OF JAMESTOWN. DOPPLER RADAR SHOWED THIS TORNADO MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ONEIDA...HUNTSVILLE...RUGBY...ELGIN...BIG SOUTH FORK NATIONAL
  REFUGE...NORMA...WINFIELD AND KETCHEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE AND
SOUTHWEST VIRGINIA.

&&

LAT...LON 3660 8426 3652 8426 3650 8428 3651 8433
      3646 8435 3642 8435 3638 8431 3639 8432
      3630 8433 3630 8480 3634 8478 3640 8467
      3660 8479
TIME...MOT...LOC 2048Z 247DEG 42KT 3639 8478

$$

MJB

1 follow-up statement

098 
WWUS54 KMRX 042108
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
508 PM EDT MON APR 4 2011

TNC129-151-042130-
/O.CON.KMRX.TO.W.0010.000000T0000Z-110404T2130Z/
SCOTT TN-MORGAN TN-
508 PM EDT MON APR 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR EXTREME
NORTHERN MORGAN AND SCOTT COUNTIES...

AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR ELGIN...OR 11
MILES SOUTH OF ONEIDA...MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  NORMA...WINFIELD AND KETCHEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE AND
SOUTHWEST VIRGINIA.

&&

LAT...LON 3660 8426 3652 8426 3650 8428 3651 8433
      3646 8435 3642 8435 3638 8431 3639 8432
      3630 8433 3630 8480 3634 8478 3640 8467
      3660 8479
TIME...MOT...LOC 2108Z 251DEG 37KT 3638 8446

$$

MJB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 9:42 PM EDT	High Wind Warning	MRX	Blount, Cocke, Greene, Sevier	26 hr
Apr 4, 3:14 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Greene, Hamblen, Hancock, Hawkins, Jefferson and 2 more	61 min
Apr 4, 4:33 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	57 min
Apr 4, 4:45 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Meigs, Rhea, Roane and 1 more	60 min
Apr 4, 5:00 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Roane	60 min
Apr 4, 5:22 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	23 min
Apr 4, 5:30 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Union	60 min
Apr 4, 5:43 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Loudon	62 min
Apr 4, 5:44 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, Loudon, McMinn, Marion and 4 more	61 min
Apr 4, 5:54 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Roane	51 min
Apr 4, 6:03 PM EDT	Areal Flood Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Hamilton, Jefferson and 12 more	117 min
Apr 4, 6:07 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Hamblen, Hancock, Hawkins	53 min
Apr 4, 6:09 PM EDT	Tornado Warning	MRX	Bradley, Hamilton, McMinn, Meigs	36 min
Apr 4, 6:19 PM EDT	Areal Flood Advisory	MRX	Anderson, Claiborne, Cocke, Grainger, Greene, Hamblen and 7 more	3 hr
Apr 4, 6:24 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Jefferson, Sevier	66 min
Apr 4, 6:33 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Bradley, Hamilton, McMinn, Monroe, Polk	57 min
Apr 4, 6:37 PM EDT	Tornado Warning	MRX	Blount, McMinn, Monroe	23 min
Apr 4, 6:40 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Loudon	35 min
Apr 4, 6:50 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Hamblen, Hawkins	55 min

Nearby

Tornado Warnings in Tennessee, 2011 Every tornado warning in 2011 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.