Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 90, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 29, 2021, 4:20 PM EDT for McMinn County, Tennessee. It was in force for 40 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 29, 2021, 4:20 PM EDT (20:20 UTC)
- Expired
- Jun 29, 2021, 5:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County McMinn County, TN
The radar
The Knoxville radar (KMRX), 133 km from the middle of the area, began a volume at 20:19 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 29, 4:50 PM EDT | TSTM WND DMG | 3 Nnw Niota, TN | MULTIPLE TREES DOWN ALONG I75 NORTHBOUND AT MM57. |
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 12:00Z, 8.3 hours before the alert went out and 202 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
- 1387 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1208 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
807
WUUS54 KMRX 292020
SVRMRX
TNC107-292100-
/O.NEW.KMRX.SV.W.0090.210629T2020Z-210629T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
420 PM EDT Tue Jun 29 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
McMinn County in east Tennessee...
* Until 500 PM EDT.
* At 420 PM EDT, a severe thunderstorm was located over Etowah, or
near Athens, moving northwest at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Athens, Etowah, Englewood, Niota, Riceville, Clear Water, Hillsview
and Dentville.
This includes Interstate 75 in Tennessee between mile markers 39 and
60.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3527 8464 3540 8484 3541 8482 3543 8482
3560 8452 3558 8452 3558 8450 3547 8444
3546 8445 3545 8444 3543 8444 3540 8443
3540 8442 3533 8440 3532 8445 3527 8452
TIME...MOT...LOC 2020Z 142DEG 12KT 3536 8456
HAIL...0.75IN
WIND...60MPH
$$
SR2 follow-up statements
608
WWUS54 KMRX 292041
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
441 PM EDT Tue Jun 29 2021
TNC107-292100-
/O.CON.KMRX.SV.W.0090.000000T0000Z-210629T2100Z/
McMinn TN-
441 PM EDT Tue Jun 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL MCMINN COUNTY...
At 441 PM EDT, a severe thunderstorm was located over Athens, moving
northwest at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Athens, Etowah, Englewood, Niota, Riceville, Clear Water and
Hillsview.
This includes Interstate 75 in Tennessee between mile markers 41 and
60.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3531 8464 3540 8484 3541 8482 3543 8482
3560 8452 3558 8452 3558 8450 3547 8444
3546 8445 3545 8444 3543 8444 3541 8445
3541 8447 3539 8446 3538 8449 3535 8455
TIME...MOT...LOC 2041Z 142DEG 12KT 3542 8461
HAIL...0.75IN
WIND...60MPH
$$
SR129
WWUS54 KMRX 292053
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
453 PM EDT Tue Jun 29 2021
TNC107-292103-
/O.EXP.KMRX.SV.W.0090.000000T0000Z-210629T2100Z/
McMinn TN-
453 PM EDT Tue Jun 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MCMINN COUNTY WILL
EXPIRE AT 500 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3531 8464 3540 8484 3541 8482 3543 8482
3560 8452 3558 8452 3558 8450 3547 8444
3546 8445 3545 8444 3543 8444 3541 8445
3541 8447 3539 8446 3538 8449 3535 8455
TIME...MOT...LOC 2053Z 142DEG 12KT 3544 8463
$$
SRThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:15 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 45 min |
| Jun 28, 8:16 PM EDT | Special Weather Statement | MRX | Morgan | 44 min |
| Jun 28, 8:42 PM EDT | Special Weather Statement | MRX | Scott | 63 min |
| Jun 28, 9:09 PM EDT | Special Weather Statement | MRX | Morgan | 51 min |
| Jun 28, 9:34 PM EDT | Areal Flood Advisory | MRX | Morgan | 116 min |
| Jun 29, 4:02 PM EDT | Special Weather Statement | MRX | McMinn | 43 min |
| Jun 29, 4:47 PM EDT | Special Weather Statement | MRX | Loudon | 28 min |
| Jun 29, 4:59 PM EDT | Special Weather Statement | MRX | Roane | 46 min |
| Jun 29, 5:22 PM EDT | Special Weather Statement | MRX | Roane | 23 min |
| Jun 29, 5:46 PM EDT | Special Weather Statement | MRX | Anderson | 44 min |
| Jun 29, 5:57 PM EDT | Special Weather Statement | MRX | Rhea | 18 min |
| Jun 29, 6:20 PM EDT | Special Weather Statement | MRX | Campbell | 40 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.