Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 21, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Apr 4, 2014, 9:14 AM EDT for 8 counties in Tennessee. It was in force for 46 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, 2014, 9:14 AM EDT (13:14 UTC)
- Expired
- Apr 4, 2014, 10:00 AM EDT
- In force
- 46 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Anderson County, TN, Campbell County, TN, Claiborne County, TN, Grainger County, TN, Knox County, TN, Morgan County, TN, Roane County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 31 km from the middle of the area, began a volume at 13:14 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, 9:35 AM EDT | TSTM WND DMG | Maynardville, TN | SEVERAL TREES DOWN COUNTY WIDE. |
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, 5:58 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 1.2 hours before the alert went out and 256 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1263 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
952
WUUS54 KMRX 041314
SVRMRX
TNC001-013-025-057-093-129-145-173-041400-
/O.NEW.KMRX.SV.W.0021.140404T1314Z-140404T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
914 AM EDT FRI APR 4 2014
THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
UNION COUNTY IN EASTERN TENNESSEE...
SOUTHEASTERN MORGAN COUNTY IN EASTERN TENNESSEE...
NORTHERN ROANE COUNTY IN EASTERN TENNESSEE...
CLAIBORNE COUNTY IN EASTERN TENNESSEE...
ANDERSON COUNTY IN EASTERN TENNESSEE...
GRAINGER COUNTY IN EASTERN TENNESSEE...
CAMPBELL COUNTY IN EASTERN TENNESSEE...
KNOX COUNTY IN EASTERN TENNESSEE...
* UNTIL 1000 AM EDT
* AT 913 AM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR RED
ASH TO LA FOLLETTE TO 8 MILES NORTH OF OLIVER SPRINGS TO NEAR
MIDTOWN...AND MOVING EAST AT 60 MPH.
* LOCATIONS IN THE PATH OF THESE STORMS INCLUDE...
CLINTON...OAK RIDGE...KNOXVILLE...ROSEDALE...NORRIS LAKE...
RUTLEDGE...TAZEWELL AND JACKSBORO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE ACROSS
CUMBERLAND AND FENTRESS COUNTIES! SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS!
&&
LAT...LON 3653 8339 3641 8339 3639 8328 3627 8331
3629 8332 3617 8348 3619 8356 3609 8364
3612 8367 3608 8366 3609 8371 3597 8366
3586 8383 3587 8424 3590 8428 3587 8428
3588 8471 3639 8425 3659 8423 3660 8347
TIME...MOT...LOC 1313Z 261DEG 50KT 3657 8417 3635 8413 3615 8429 3586
8459
$$
AMP.231 follow-up statement
017
WWUS54 KMRX 041335
SVSMRX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
935 AM EDT FRI APR 4 2014
TNC129-041341-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-140404T1400Z/
MORGAN TN-
935 AM EDT FRI APR 4 2014
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORGAN COUNTY IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 3653 8339 3641 8339 3639 8328 3627 8331
3629 8332 3617 8348 3619 8356 3609 8364
3612 8367 3608 8366 3609 8371 3597 8366
3586 8383 3587 8424 3590 8428 3587 8428
3588 8453 3622 8420 3659 8418 3660 8347
TIME...MOT...LOC 1331Z 264DEG 46KT 3660 8398 3629 8394 3613 8415 3590
8442
$$
TNC001-013-025-057-093-145-173-041400-
/O.CON.KMRX.SV.W.0021.000000T0000Z-140404T1400Z/
UNION TN-ROANE TN-CLAIBORNE TN-ANDERSON TN-GRAINGER TN-CAMPBELL TN-
KNOX TN-
935 AM EDT FRI APR 4 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT
FOR UNION...NORTHEASTERN ROANE...CLAIBORNE...ANDERSON...GRAINGER...
CAMPBELL AND KNOX COUNTIES...
AT 931 AM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM WILKERSON
TO 7 MILES WEST OF MAYNARDVILLE TO NEAR CLINTON TO NEAR KINGSTON...
MOVING EAST AT 55 MPH.
LOCATIONS IMPACTED INCLUDE... KNOXVILLE...OAK RIDGE...CLINTON...
LENOIR CITY...LA FOLLETTE... KINGSTON...MAYNARDVILLE...
RUTLEDGE...FARRAGUT... MIDDLESBOROUGH...OLIVER SPRINGS...NEW
TAZEWELL...BEAN STATION... TAZEWELL...PLAINVIEW...JACKSBORO...
ROCKFORD...HARROGATE...NORRIS LAKE...AND LONE MOUNTAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE ACROSS
CUMBERLAND...FENTRESS AND CAMPBELL COUNTIES! SEEK SHELTER NOW INSIDE
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3653 8339 3641 8339 3639 8328 3627 8331
3629 8332 3617 8348 3619 8356 3609 8364
3612 8367 3608 8366 3609 8371 3597 8366
3586 8383 3587 8424 3590 8428 3587 8428
3588 8453 3622 8420 3659 8418 3660 8347
TIME...MOT...LOC 1331Z 264DEG 46KT 3660 8398 3629 8394 3613 8415 3590
8442
$$
AMP.23The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 8:04 AM EDT | Special Weather Statement | MRX | Bradley, Hamilton, McMinn, Meigs, Polk | 41 min |
| Apr 4, 8:14 AM EDT | Special Weather Statement | MRX | Anderson, Campbell, Knox, Loudon, Morgan, Rhea and 3 more | 46 min |
| Apr 4, 8:50 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Morgan, Roane, Scott | 25 min |
| Apr 4, 8:54 AM EDT | Special Weather Statement | MRX | Blount, Claiborne, Grainger, Knox, Loudon, Monroe and 1 more | 51 min |
| Apr 4, 9:22 AM EDT | Special Weather Statement | MRX | Blount, Cocke, Grainger, Greene, Hamblen, Hawkins and 2 more | 38 min |
| Apr 4, 10:00 AM EDT | Special Weather Statement | MRX | Blount, Cocke, Grainger, Greene, Hamblen, Hancock and 4 more | 45 min |
| Apr 4, 10:45 AM EDT | Special Weather Statement | MRX | Carter, Johnson, Sullivan, Unicoi, Washington | 45 min |
| Apr 4, 10:54 AM EDT | Special Weather Statement | MRX | Cocke, Greene, Hawkins, Sullivan, Unicoi, Washington | 36 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2014Every severe thunderstorm warning in 2014
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.