Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 5, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Mar 25, 2021, 11:55 PM EDT for Blount County, Monroe County, Polk County, Tennessee. It was in force for 65 min. 2 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
- Mar 25, 2021, 11:55 PM EDT (03:55 UTC)
- Expired
- Mar 26, 2021, 1:00 AM EDT
- In force
- 65 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Blount County, TN, Monroe County, TN, Polk County, TN
The radar
The Knoxville radar (KMRX), 106 km from the middle of the area, began a volume at 03:55 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 |
|---|---|---|---|
| Mar 26, 12:28 AM EDT | HAIL 1.25 | 3 Se Tariffville, TN | |
| Mar 26, 12:51 AM EDT | HAIL 1 | 3 Ne Walland, TN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.9 hours before the alert went out and 230 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
- 344 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 476 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.8
The text
As transmitted.
106
WUUS54 KMRX 260355
SVRMRX
TNC009-123-139-260500-
/O.NEW.KMRX.SV.W.0005.210326T0355Z-210326T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
1155 PM EDT Thu Mar 25 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Central Polk County in east Tennessee...
Blount County in east Tennessee...
Monroe County in east Tennessee...
* Until 100 AM EDT.
* At 1154 PM EDT, a severe thunderstorm was located 7 miles east of
Benton, moving northeast at 60 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...
Maryville, Alcoa, Benton, Eagleton Village, Smoky Mountains-Fontana
Area, Tellico Plains, Townsend, Walland, Bullet Creek and
Archville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM EDT for east
Tennessee.
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. 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 3514 8467 3527 8453 3533 8440 3537 8441
3585 8388 3585 8384 3578 8373 3571 8370
3569 8366 3559 8366 3552 8388 3547 8392
3541 8402 3537 8401 3534 8403 3524 8418
3527 8423 3522 8429 3516 8430 3501 8452
TIME...MOT...LOC 0354Z 228DEG 68KT 3514 8452
HAIL...1.00IN
WIND...60MPH
$$
DH3 follow-up statements
307
WWUS54 KMRX 260411
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1211 AM EDT Fri Mar 26 2021
TNC139-260420-
/O.CAN.KMRX.SV.W.0005.000000T0000Z-210326T0500Z/
Polk TN-
1211 AM EDT Fri Mar 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL POLK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 200 AM EDT for east
Tennessee.
LAT...LON 3524 8436 3529 8450 3533 8440 3537 8441
3585 8388 3585 8384 3579 8374 3571 8370
3569 8366 3559 8366 3552 8388 3547 8392
3541 8402 3537 8401 3534 8403 3524 8418
3527 8423 3521 8429 3522 8432 3520 8435
TIME...MOT...LOC 0410Z 228DEG 68KT 3535 8423
$$
TNC009-123-260500-
/O.CON.KMRX.SV.W.0005.000000T0000Z-210326T0500Z/
Blount TN-Monroe TN-
1211 AM EDT Fri Mar 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM EDT
FOR BLOUNT AND MONROE COUNTIES...
At 1210 AM EDT, a severe thunderstorm was located 14 miles southeast
of Madisonville, moving northeast at 80 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Maryville, Alcoa, Eagleton Village, Smoky Mountains-Fontana Area,
Tellico Plains, Townsend, Coker Creek, Tariffville, Walland and
Bullet Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM EDT for east
Tennessee.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and 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 3524 8436 3529 8450 3533 8440 3537 8441
3585 8388 3585 8384 3579 8374 3571 8370
3569 8366 3559 8366 3552 8388 3547 8392
3541 8402 3537 8401 3534 8403 3524 8418
3527 8423 3521 8429 3522 8432 3520 8435
TIME...MOT...LOC 0410Z 228DEG 68KT 3535 8423
HAIL...1.25IN
WIND...60MPH
$$
BW768
WWUS54 KMRX 260431
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1231 AM EDT Fri Mar 26 2021
TNC123-260440-
/O.CAN.KMRX.SV.W.0005.000000T0000Z-210326T0500Z/
Monroe TN-
1231 AM EDT Fri Mar 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR MONROE COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 200 AM EDT for east
Tennessee.
LAT...LON 3546 8396 3549 8394 3550 8398 3549 8399
3551 8401 3553 8399 3556 8400 3554 8409
3558 8410 3559 8416 3585 8388 3585 8384
3579 8374 3571 8370 3569 8366 3559 8366
3552 8388 3547 8392 3546 8395
TIME...MOT...LOC 0430Z 228DEG 68KT 3560 8388
$$
TNC009-260500-
/O.CON.KMRX.SV.W.0005.000000T0000Z-210326T0500Z/
Blount TN-
1231 AM EDT Fri Mar 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM EDT
FOR BLOUNT COUNTY...
At 1230 AM EDT, a severe thunderstorm was located 8 miles north of
Smoky Mountains-Twentymile Creek, or 11 miles southeast of Maryville,
moving northeast at 60 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Maryville, Alcoa, Eagleton Village, Smoky Mountains-Fontana Area,
Townsend, Walland, Happy Valley, Wildwood, Talassee and Cades Cove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 200 AM EDT for east
Tennessee.
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and 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 3546 8396 3549 8394 3550 8398 3549 8399
3551 8401 3553 8399 3556 8400 3554 8409
3558 8410 3559 8416 3585 8388 3585 8384
3579 8374 3571 8370 3569 8366 3559 8366
3552 8388 3547 8392 3546 8395
TIME...MOT...LOC 0430Z 228DEG 68KT 3560 8388
HAIL...1.25IN
WIND...60MPH
$$
BW897
WWUS54 KMRX 260459
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1259 AM EDT Fri Mar 26 2021
TNC009-260508-
/O.EXP.KMRX.SV.W.0005.000000T0000Z-210326T0500Z/
Blount TN-
1259 AM EDT Fri Mar 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR BLOUNT COUNTY WILL EXPIRE AT
100 AM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3546 8396 3549 8394 3550 8398 3549 8399
3551 8401 3553 8399 3556 8400 3554 8409
3558 8410 3559 8416 3585 8388 3585 8384
3579 8374 3571 8370 3569 8366 3559 8366
3552 8388 3547 8392 3546 8395
TIME...MOT...LOC 0458Z 228DEG 68KT 3590 8347
$$
BWThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 10:52 PM EDT | River Flood Warning | MRX | Polk | 10 hr |
| Mar 25, 11:06 PM EDT | Special Weather Statement | MRX | Polk | 39 min |
| Mar 25, 11:43 PM EDT | Special Weather Statement | MRX | Bledsoe, Loudon, Rhea, Roane | 47 min |
| Mar 25, 11:43 PM EDT | Special Weather Statement | MRX | Monroe, Polk | 47 min |
| Mar 25, 11:46 PM EDT | Areal Flood Warning | MRX | Polk | 5 hr |
| Mar 26, 12:14 AM EDT | Special Weather Statement | MRX | Anderson, Campbell, Morgan | 46 min |
| Mar 26, 12:36 AM EDT | Severe Thunderstorm Warning | MRX | Blount, Cocke, Greene, Hamblen, Hawkins, Jefferson and 1 more | 22 min |
| Mar 26, 1:01 AM EDT | Areal Flood Advisory | MRX | Grainger, Hamblen, Hancock, Hawkins, Jefferson, Knox and 1 more | 3 hr |
| Mar 26, 1:23 AM EDT | Special Weather Statement | MRX | Blount, Grainger, Hamblen, Jefferson, Knox, Loudon and 2 more | 52 min |
| Mar 26, 7:12 AM EDT | River Flood Warning | MRX | Cocke, Jefferson | 9 hr |
| Mar 26, 7:10 PM EDT | Flash Flood Watch | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 44 hr |
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.