Alert archive / Tennessee / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 21, NWS Morristown, TN

May 2, 20165 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 2, 2016, 3:59 PM EDT for 5 counties in Tennessee. It was in force for 46 min. 6 reports 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: May 2, 2016, 3:59 PM EDT (19:59 UTC)
Expired: May 2, 2016, 4:45 PM EDT
In force: 46 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Anderson County, TN, Blount County, TN, Knox County, TN, Loudon County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 92 km from the middle of the area, began a volume at 19:59 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
May 2, 4:14 PM EDT	HAIL 1	Lenoir City, TN
May 2, 4:24 PM EDT	HAIL 1.5	3 W Farragut, TN
May 2, 4:24 PM EDT	HAIL 1.5	5 W Farragut, TN
May 2, 4:25 PM EDT	HAIL 1.75	Farragut, TN
May 2, 4:29 PM EDT	HAIL 1	Farragut, TN
May 2, 4:35 PM EDT	HAIL 1	6 Ese Farragut, TN

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
May 2, 2:17 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.0 hours before the alert went out and 208 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: 1041 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

010 
WUUS54 KMRX 021959
SVRMRX
TNC001-009-093-105-145-022045-
/O.NEW.KMRX.SV.W.0021.160502T1959Z-160502T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
359 PM EDT MON MAY 2 2016

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN KNOX COUNTY IN EASTERN TENNESSEE...
  NORTHWESTERN BLOUNT COUNTY IN EASTERN TENNESSEE...
  SOUTH CENTRAL ANDERSON COUNTY IN EASTERN TENNESSEE...
  SOUTHEASTERN ROANE COUNTY IN EASTERN TENNESSEE...
  CENTRAL LOUDON COUNTY IN EASTERN TENNESSEE...

* UNTIL 445 PM EDT

* AT 359 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR KINGSTON...
  MOVING EAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  KNOXVILLE...OAK RIDGE...CLINTON...LENOIR CITY...ALCOA...KINGSTON...
  LOUDON...FARRAGUT...LOUISVILLE...FRIENDSVILLE...KARNS AND BRADBURY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

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

&&

LAT...LON 3567 8447 3582 8457 3607 8415 3580 8396
TIME...MOT...LOC 1959Z 248DEG 24KT 3579 8446 

HAIL...1.00IN
WIND...60MPH
 
$$

MOULTON

3 follow-up statements

913 
WWUS54 KMRX 022015
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
415 PM EDT MON MAY 2 2016

TNC001-145-022024-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-160502T2045Z/
ANDERSON TN-ROANE TN-
415 PM EDT MON MAY 2 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ANDERSON AND
SOUTHEASTERN ROANE COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
EASTERN TENNESSEE.

LAT...LON 3583 8435 3584 8434 3589 8433 3588 8428
      3590 8429 3590 8427 3591 8427 3592 8425
      3593 8426 3594 8425 3593 8424 3595 8424
      3594 8422 3596 8421 3601 8411 3580 8396
      3573 8430
TIME...MOT...LOC 2014Z 250DEG 33KT 3584 8427 

$$

TNC009-093-105-022045-
/O.CON.KMRX.SV.W.0021.000000T0000Z-160502T2045Z/
KNOX TN-BLOUNT TN-LOUDON TN-
415 PM EDT MON MAY 2 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHWESTERN KNOX...NORTHWESTERN BLOUNT AND NORTHEASTERN LOUDON
COUNTIES...

AT 414 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER LENOIR CITY...
MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...OAK RIDGE...LENOIR CITY...ALCOA...FARRAGUT...LOUISVILLE...
FRIENDSVILLE AND KARNS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3583 8435 3584 8434 3589 8433 3588 8428
      3590 8429 3590 8427 3591 8427 3592 8425
      3593 8426 3594 8425 3593 8424 3595 8424
      3594 8422 3596 8421 3601 8411 3580 8396
      3573 8430
TIME...MOT...LOC 2014Z 250DEG 33KT 3584 8427 

HAIL...1.00IN
WIND...60MPH
 
$$

DGS

641 
WWUS54 KMRX 022025
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
425 PM EDT MON MAY 2 2016

TNC105-022035-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-160502T2045Z/
LOUDON TN-
425 PM EDT MON MAY 2 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LOUDON COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
EASTERN TENNESSEE.

LAT...LON 3577 8418 3581 8417 3590 8427 3591 8427
      3592 8425 3593 8426 3594 8425 3593 8424
      3595 8424 3594 8422 3596 8421 3601 8411
      3580 8396 3576 8416
TIME...MOT...LOC 2025Z 248DEG 24KT 3587 8418 

$$

TNC009-093-022045-
/O.CON.KMRX.SV.W.0021.000000T0000Z-160502T2045Z/
KNOX TN-BLOUNT TN-
425 PM EDT MON MAY 2 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHWESTERN KNOX AND NORTHWESTERN BLOUNT COUNTIES...

AT 425 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER FARRAGUT...OR
NEAR LENOIR CITY...MOVING EAST AT 30 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT WIND 
         DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...ALCOA...FARRAGUT...LOUISVILLE...FRIENDSVILLE AND KARNS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3577 8418 3581 8417 3590 8427 3591 8427
      3592 8425 3593 8426 3594 8425 3593 8424
      3595 8424 3594 8422 3596 8421 3601 8411
      3580 8396 3576 8416
TIME...MOT...LOC 2025Z 248DEG 24KT 3587 8418 

HAIL...1.50IN
WIND...60MPH
 
$$

DGS

969 
WWUS54 KMRX 022041
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
441 PM EDT MON MAY 2 2016

TNC009-093-022051-
/O.EXP.KMRX.SV.W.0021.000000T0000Z-160502T2045Z/
KNOX TN-BLOUNT TN-
441 PM EDT MON MAY 2 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KNOX AND
NORTHWESTERN BLOUNT COUNTIES WILL EXPIRE AT 445 PM EDT...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
EASTERN TENNESSEE.

LAT...LON 3577 8418 3581 8417 3590 8427 3591 8427
      3592 8425 3593 8426 3594 8425 3593 8424
      3595 8424 3594 8422 3596 8421 3601 8411
      3580 8396 3576 8416
TIME...MOT...LOC 2040Z 248DEG 24KT 3587 8418 

$$
DGS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 12:57 PM EDT	Special Weather Statement	MRX	Scott	33 min
May 2, 1:07 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	38 min
May 2, 1:58 PM EDT	Special Weather Statement	MRX	Campbell	47 min
May 2, 2:31 PM EDT	Special Weather Statement	MRX	Bledsoe, Rhea	44 min
May 2, 3:19 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, Meigs, Rhea, Roane	41 min
May 2, 3:39 PM EDT	Special Weather Statement	MRX	Sequatchie	36 min
May 2, 4:24 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox	51 min
May 2, 4:33 PM EDT	Special Weather Statement	MRX	Carter	57 min
May 2, 4:48 PM EDT	Special Weather Statement	MRX	Meigs	27 min
May 2, 4:55 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Knox, Sevier	27 min
May 2, 5:29 PM EDT	Areal Flood Advisory	MRX	Loudon, Meigs, Rhea, Roane	3 hr
May 2, 5:39 PM EDT	Special Weather Statement	MRX	Jefferson	36 min
May 2, 5:53 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	37 min
May 2, 5:56 PM EDT	Special Weather Statement	MRX	Bradley, Polk	34 min
May 2, 6:31 PM EDT	Special Weather Statement	MRX	Johnson	29 min
May 2, 6:47 PM EDT	Special Weather Statement	MRX	Unicoi, Washington	43 min
May 2, 6:54 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Unicoi, Washington	36 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2016 Every severe thunderstorm warning in 2016

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.