Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 57, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at May 28, 2021, 4:32 PM EDT for 4 counties in Tennessee. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 28, 2021, 4:32 PM EDT (20:32 UTC)
- Expired
- May 28, 2021, 5:15 PM EDT
- In force
- 43 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Grainger County, TN, Jefferson County, TN, Knox County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 21 km from the middle of the area, began a volume at 20:34 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.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 8.5 hours before the alert went out and 266 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
- 204 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 749 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
092
WUUS54 KMRX 282032
SVRMRX
TNC057-089-093-173-282115-
/O.NEW.KMRX.SV.W.0057.210528T2032Z-210528T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
432 PM EDT Fri May 28 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Northeastern Knox County in east Tennessee...
Northwestern Jefferson County in east Tennessee...
Southern Union County in east Tennessee...
Western Grainger County in east Tennessee...
* Until 515 PM EDT.
* At 432 PM EDT, a severe thunderstorm was located near Plainview, or
7 miles southwest of Maynardville, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Knoxville, Jefferson City, Maynardville, Rutledge, Plainview, New
Market, Strawberry Plains, Blaine, Luttrell and Buffalo Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3636 8349 3619 8345 3619 8347 3616 8346
3616 8344 3609 8342 3602 8388 3619 8394
3621 8397 3623 8398
TIME...MOT...LOC 2032Z 257DEG 43KT 3616 8389
HAIL...<.75IN
WIND...60MPH
$$
JLB2 follow-up statements
019
WWUS54 KMRX 282052
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
452 PM EDT Fri May 28 2021
TNC057-089-093-173-282115-
/O.CON.KMRX.SV.W.0057.000000T0000Z-210528T2115Z/
Knox TN-Jefferson TN-Union TN-Grainger TN-
452 PM EDT Fri May 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN KNOX...NORTHWESTERN JEFFERSON...SOUTHEASTERN UNION
AND WESTERN GRAINGER COUNTIES...
At 452 PM EDT, a severe thunderstorm was located near Rutledge,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Jefferson City, Rutledge, New Market, Strawberry Plains, Blaine,
Luttrell, House Mountain State Park, Mascot, Joppa and Buffalo
Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3636 8349 3619 8345 3619 8347 3616 8346
3616 8344 3609 8342 3603 8383 3630 8371
TIME...MOT...LOC 2052Z 257DEG 43KT 3621 8360
HAIL...<.75IN
WIND...60MPH
$$
JLB137
WWUS54 KMRX 282058
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
458 PM EDT Fri May 28 2021
TNC093-173-282107-
/O.CAN.KMRX.SV.W.0057.000000T0000Z-210528T2115Z/
Knox TN-Union TN-
458 PM EDT Fri May 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KNOX 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 3636 8349 3619 8345 3619 8347 3616 8346
3616 8344 3609 8342 3606 8367 3631 8364
TIME...MOT...LOC 2057Z 257DEG 43KT 3622 8352
$$
TNC057-089-282115-
/O.CON.KMRX.SV.W.0057.000000T0000Z-210528T2115Z/
Jefferson TN-Grainger TN-
458 PM EDT Fri May 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN JEFFERSON AND WESTERN GRAINGER COUNTIES...
At 457 PM EDT, a severe thunderstorm was located near Rutledge,
moving east at 50 mph. Strongest winds are approaching New Market
and Jefferson City.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Jefferson City, Rutledge, New Market, Joppa and Buffalo Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3636 8349 3619 8345 3619 8347 3616 8346
3616 8344 3609 8342 3606 8367 3631 8364
TIME...MOT...LOC 2057Z 257DEG 43KT 3622 8352
HAIL...<.75IN
WIND...70MPH
$$
JLBThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 2:44 PM EDT | Special Weather Statement | MRX | Hancock, Hawkins | 46 min |
| May 28, 2:58 PM EDT | Areal Flood Advisory | MRX | Campbell, Morgan, Scott | 3 hr |
| May 28, 3:00 PM EDT | Special Weather Statement | MRX | Grainger | 45 min |
| May 28, 3:08 PM EDT | Special Weather Statement | MRX | Sullivan | 37 min |
| May 28, 3:33 PM EDT | Special Weather Statement | MRX | Campbell, Morgan, Roane, Scott | 42 min |
| May 28, 3:54 PM EDT | Special Weather Statement | MRX | Loudon | 36 min |
| May 28, 3:58 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Knox, Morgan, Roane | 47 min |
| May 28, 4:13 PM EDT | Special Weather Statement | MRX | Anderson, Claiborne, Grainger, Knox, Union | 47 min |
| May 28, 4:18 PM EDT | Special Weather Statement | MRX | Monroe | 42 min |
| May 28, 4:56 PM EDT | Special Weather Statement | MRX | Grainger, Hamblen, Jefferson | 49 min |
| May 28, 5:02 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 43 min |
| May 28, 5:18 PM EDT | Special Weather Statement | MRX | Greene, Hamblen, Hancock, Hawkins, Jefferson | 42 min |
| May 28, 5:35 PM EDT | Severe Thunderstorm Warning | MRX | Greene, Hawkins | 40 min |
| May 28, 5:40 PM EDT | Special Weather Statement | MRX | Monroe, Polk | 65 min |
| May 28, 5:58 PM EDT | Special Weather Statement | MRX | Carter, Sullivan, Washington | 62 min |
| May 28, 6:42 PM EDT | Special Weather Statement | MRX | Carter, Johnson | 48 min |
| May 28, 6:46 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson | 29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.