Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 55, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at May 9, 2021, 6:05 PM EDT for 5 counties in Tennessee. It was in force for 40 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
- May 9, 2021, 6:05 PM EDT (22:05 UTC)
- Expired
- May 9, 2021, 6:45 PM EDT
- In force
- 40 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Claiborne County, TN, Grainger County, TN, Hamblen County, TN, Jefferson County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 23 km from the middle of the area, began a volume at 22:07 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 |
|---|---|---|---|
| May 9, 6:07 PM EDT | TSTM WND DMG | Sharps Chapel, TN | NUMEROUS TREES DOWN IN SHARPS CHAPEL AND ELSEWHERE IN UNION COUNTY. TDOT IS WORKING TO CLEAR BLOCKED ROADS. |
| May 9, 6:20 PM EDT | TSTM WND DMG | 4 Sw Buffalo Springs, TN | A COUPLE OF TREES DOWN NEAR BRISCOE ROAD, AND INDIAN RIDGE ROAD. |
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, 10.1 hours before the alert went out and 265 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
- 1018 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 385 m²/s²
- 0-3 km storm-relative helicity
- 519 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
787
WUUS54 KMRX 092205
SVRMRX
TNC025-057-063-089-173-092245-
/O.NEW.KMRX.SV.W.0055.210509T2205Z-210509T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
605 PM EDT Sun May 9 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
South central Claiborne County in east Tennessee...
Northwestern Jefferson County in east Tennessee...
Union County in east Tennessee...
Grainger County in east Tennessee...
West central Hamblen County in east Tennessee...
* Until 645 PM EDT.
* At 605 PM EDT, a severe thunderstorm was located 10 miles east of
La Follette, moving southeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Morristown, Jefferson City, Maynardville, Rutledge, Plainview, New
Market, Blaine, Luttrell, Panther Creek State Park and Rose Hill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3626 8329 3601 8357 3611 8370 3612 8369
3614 8372 3617 8374 3617 8377 3631 8396
3645 8378
TIME...MOT...LOC 2205Z 301DEG 40KT 3641 8395
HAIL...0.75IN
WIND...60MPH
$$
Diegan2 follow-up statements
416
WWUS54 KMRX 092217
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
617 PM EDT Sun May 9 2021
TNC025-057-063-089-173-092245-
/O.CON.KMRX.SV.W.0055.000000T0000Z-210509T2245Z/
Claiborne TN-Jefferson TN-Union TN-Grainger TN-Hamblen TN-
617 PM EDT Sun May 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTH CENTRAL CLAIBORNE...NORTHWESTERN JEFFERSON...SOUTHEASTERN
UNION...GRAINGER AND WEST CENTRAL HAMBLEN COUNTIES...
At 617 PM EDT, a severe thunderstorm was located 7 miles east of
Maynardville, moving southeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Morristown, Jefferson City, Maynardville, Rutledge, Plainview, New
Market, Blaine, Luttrell, Panther Creek State Park and Rose Hill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3626 8329 3601 8357 3611 8370 3612 8369
3614 8372 3617 8374 3617 8377 3625 8388
3641 8367
TIME...MOT...LOC 2217Z 303DEG 37KT 3626 8368
HAIL...<.75IN
WIND...60MPH
$$
CED290
WWUS54 KMRX 092234
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
634 PM EDT Sun May 9 2021
TNC025-173-092243-
/O.CAN.KMRX.SV.W.0055.000000T0000Z-210509T2245Z/
Claiborne TN-Union TN-
634 PM EDT Sun May 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLAIBORNE AND
SOUTHEASTERN UNION COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3626 8329 3601 8357 3611 8370 3612 8369
3614 8372 3633 8347
TIME...MOT...LOC 2233Z 301DEG 40KT 3616 8348
$$
TNC057-063-089-092245-
/O.CON.KMRX.SV.W.0055.000000T0000Z-210509T2245Z/
Jefferson TN-Grainger TN-Hamblen TN-
634 PM EDT Sun May 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHWESTERN JEFFERSON...CENTRAL GRAINGER AND WEST CENTRAL
HAMBLEN COUNTIES...
At 633 PM EDT, a severe thunderstorm was located near Jefferson City,
moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Morristown, Jefferson City, Rutledge, New Market, Blaine, Panther
Creek State Park, Buffalo Springs and Alpha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3626 8329 3601 8357 3611 8370 3612 8369
3614 8372 3633 8347
TIME...MOT...LOC 2233Z 301DEG 40KT 3616 8348
HAIL...<.75IN
WIND...60MPH
$$
DieganThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 3:36 AM EDT | Wind Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 16 hr |
| May 9, 6:00 PM EDT | Special Weather Statement | MRX | Anderson, Grainger, Hamblen, Knox, Union | 45 min |
| May 9, 6:40 PM EDT | Special Weather Statement | MRX | Cocke, Hamblen | 50 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.