Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 64, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 14, 2021, 2:31 AM EDT for Blount County, Knox County, Loudon County, Tennessee. It was in force for 32 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
- Jun 14, 2021, 2:31 AM EDT (06:31 UTC)
- Expired
- Jun 14, 2021, 3:03 AM EDT
- In force
- 32 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Blount County, TN, Knox County, TN, Loudon County, TN
The radar
The Knoxville radar (KMRX), 72 km from the middle of the area, began a volume at 06:30 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 |
|---|---|---|---|
| Jun 14, 2:35 AM EDT | TSTM WND DMG | 3 E Farragut, TN | REPORT OF LARGE LIMBS BLOWN DOWN AS WELL AS A TREE THAT FELL ON CARS. TIME IS ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 6.5 hours before the alert went out and 227 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
- 1471 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1759 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
507 WUUS54 KMRX 140631 SVRMRX TNC009-093-105-140715- /O.NEW.KMRX.SV.W.0064.210614T0631Z-210614T0715Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Morristown TN 231 AM EDT Mon Jun 14 2021 The National Weather Service in Morristown has issued a * Severe Thunderstorm Warning for... East central Loudon County in east Tennessee... Southwestern Knox County in east Tennessee... Northwestern Blount County in east Tennessee... * Until 315 AM EDT. * At 231 AM EDT, a severe thunderstorm was located over Louisville, or near Alcoa, moving south at 10 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Knoxville, Maryville, Alcoa, Farragut, Louisville and Friendsville. This includes Interstate 40 in Tennessee between mile markers 376 and 378. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3593 8412 3591 8399 3573 8401 3577 8425 TIME...MOT...LOC 0631Z 021DEG 10KT 3585 8408 HAIL...0.88IN WIND...60MPH $$ JLB
2 follow-up statements
710
WWUS54 KMRX 140653
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
253 AM EDT Mon Jun 14 2021
TNC093-140702-
/O.CAN.KMRX.SV.W.0064.000000T0000Z-210614T0715Z/
Knox TN-
253 AM EDT Mon Jun 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KNOX COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3577 8425 3583 8420 3582 8417 3579 8416
3579 8414 3581 8414 3583 8403 3574 8405
TIME...MOT...LOC 0652Z 021DEG 10KT 3579 8411
$$
TNC009-105-140715-
/O.CON.KMRX.SV.W.0064.000000T0000Z-210614T0715Z/
Loudon TN-Blount TN-
253 AM EDT Mon Jun 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM EDT
FOR EAST CENTRAL LOUDON AND NORTHWESTERN BLOUNT COUNTIES...
At 252 AM EDT, a severe thunderstorm was located near Louisville, or
7 miles west of Alcoa, moving south at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Maryville, Louisville and Friendsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3577 8425 3583 8420 3582 8417 3579 8416
3579 8414 3581 8414 3583 8403 3574 8405
TIME...MOT...LOC 0652Z 021DEG 10KT 3579 8411
HAIL...0.75IN
WIND...60MPH
$$
JLB455
WWUS54 KMRX 140703
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
303 AM EDT Mon Jun 14 2021
TNC009-105-140713-
/O.CAN.KMRX.SV.W.0064.000000T0000Z-210614T0715Z/
Loudon TN-Blount TN-
303 AM EDT Mon Jun 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LOUDON AND
NORTHWESTERN BLOUNT COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled. However gusty winds are still possible with this
thunderstorm.
LAT...LON 3577 8425 3583 8420 3582 8417 3579 8416
3579 8414 3581 8414 3583 8403 3574 8405
TIME...MOT...LOC 0659Z 021DEG 10KT 3576 8412
$$
JLBThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 9:09 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 36 min |
| Jun 13, 9:39 PM EDT | Special Weather Statement | MRX | Scott | 36 min |
| Jun 13, 10:00 PM EDT | Special Weather Statement | MRX | Hamilton | 30 min |
| Jun 13, 10:26 PM EDT | Special Weather Statement | MRX | Marion | 19 min |
| Jun 13, 10:37 PM EDT | Special Weather Statement | MRX | Hawkins | 23 min |
| Jun 13, 10:59 PM EDT | Special Weather Statement | MRX | Greene | 31 min |
| Jun 13, 11:27 PM EDT | Special Weather Statement | MRX | Greene | 48 min |
| Jun 14, 12:22 AM EDT | Special Weather Statement | MRX | Hawkins | 23 min |
| Jun 14, 12:56 AM EDT | Special Weather Statement | MRX | Union | 34 min |
| Jun 14, 1:09 AM EDT | Special Weather Statement | MRX | Union | 36 min |
| Jun 14, 1:35 AM EDT | Special Weather Statement | MRX | Loudon | 25 min |
| Jun 14, 2:09 AM EDT | Special Weather Statement | MRX | Knox | 36 min |
| Jun 14, 2:22 AM EDT | Special Weather Statement | MRX | Hamblen | 38 min |
| Jun 14, 3:02 AM EDT | Special Weather Statement | MRX | Marion | 28 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2021Every severe thunderstorm warning in 2021
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.