Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 21, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Mar 27, 2021, 11:11 AM EDT for Unicoi County, Washington County, Tennessee. It was in force for 35 min. 6 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 27, 2021, 11:11 AM EDT (15:11 UTC)
- Expired
- Mar 27, 2021, 11:46 AM EDT
- In force
- 35 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 50.0 mph
Counties Unicoi County, TN, Washington County, TN
The radar
The Knoxville radar (KMRX), 90 km from the middle of the area, began a volume at 15:10 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 27, 11:22 AM EDT | HAIL 0.25 | 2 Se Avondale, TN | |
| Mar 27, 11:30 AM EDT | HAIL 0.88 | Johnson City, TN | |
| Mar 27, 11:30 AM EDT | HAIL 1.5 | Johnson City, TN | TVA CREDIT UNION STADIUM. |
| Mar 27, 11:31 AM EDT | HAIL 1.25 | 3 Se Avondale, TN | REPORT FROM MPING: HALF DOLLAR (1.25 IN.). |
| Mar 27, 11:42 AM EDT | HAIL 0.7 | 2 Se Avondale, TN | |
| Mar 27, 11:43 AM EDT | HAIL 1.5 | 3 Se Avondale, TN | REPORT FROM MPING: PING PONG BALL (1.50 IN.). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 3.2 hours before the alert went out and 226 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
- 2434 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
060
WUUS54 KMRX 271511
SVRMRX
TNC171-179-271600-
/O.NEW.KMRX.SV.W.0021.210327T1511Z-210327T1600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
1111 AM EDT Sat Mar 27 2021
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Washington County in east Tennessee...
Northern Unicoi County in east Tennessee...
* Until noon EDT.
* At 1110 AM EDT, a severe thunderstorm was located near Tusculum, or
8 miles east of Greeneville, moving east at 45 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect
damage to roofs, siding, windows, and vehicles.
* Locations impacted include...
Johnson City, Erwin, Jonesborough, Midway, Pine Crest, Central,
Unicoi, Watauga, Leesburg and Limestone.
This includes Interstate 26 in Tennessee between mile markers 17 and
25, and between mile markers 29 and 36.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3613 8263 3614 8264 3621 8265 3629 8264
3640 8239 3641 8238 3639 8238 3640 8237
3640 8230 3636 8230 3625 8234 3626 8230
3623 8226 3621 8227 3621 8224 3618 8223
TIME...MOT...LOC 1510Z 254DEG 38KT 3619 8266
HAIL...1.50IN
WIND...<50MPH
$$
Garuckas3 follow-up statements
502
WWUS54 KMRX 271516
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1116 AM EDT Sat Mar 27 2021
TNC171-179-271600-
/O.CON.KMRX.SV.W.0021.000000T0000Z-210327T1600Z/
Washington TN-Unicoi TN-
1116 AM EDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
WASHINGTON AND NORTHERN UNICOI COUNTIES...
At 1116 AM EDT, a severe thunderstorm was located 8 miles southwest
of Jonesborough, or 10 miles northwest of Erwin, moving east at 45
mph.
HAZARD...Golf ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
Locations impacted include...
Johnson City, Erwin, Jonesborough, Midway, Pine Crest, Central,
Unicoi, Watauga, Leesburg and Limestone.
This includes Interstate 26 in Tennessee between mile markers 17 and
25, and between mile markers 29 and 36.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3613 8263 3614 8264 3621 8265 3629 8264
3640 8239 3641 8238 3639 8238 3640 8237
3640 8230 3636 8230 3625 8234 3626 8230
3623 8226 3621 8227 3621 8224 3618 8223
TIME...MOT...LOC 1516Z 254DEG 38KT 3621 8258
HAIL...1.75IN
WIND...<50MPH
$$
Garuckas633
WWUS54 KMRX 271536
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1136 AM EDT Sat Mar 27 2021
TNC171-271545-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-210327T1600Z/
Unicoi TN-
1136 AM EDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN UNICOI 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 3627 8240 3636 8248 3637 8247 3640 8239
3641 8238 3639 8238 3640 8237 3640 8230
3636 8230 3628 8233
TIME...MOT...LOC 1535Z 248DEG 44KT 3632 8230
$$
TNC179-271600-
/O.CON.KMRX.SV.W.0021.000000T0000Z-210327T1600Z/
Washington TN-
1136 AM EDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
NORTHEASTERN WASHINGTON COUNTY...
At 1135 AM EDT, a severe thunderstorm was located over Central, or
near Elizabethton, moving east at 50 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
Locations impacted include...
Johnson City, Midway, Pine Crest, Central and Watauga.
This includes Interstate 26 in Tennessee between mile markers 17 and
25.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3627 8240 3636 8248 3637 8247 3640 8239
3641 8238 3639 8238 3640 8237 3640 8230
3636 8230 3628 8233
TIME...MOT...LOC 1535Z 248DEG 44KT 3632 8230
HAIL...1.50IN
WIND...<50MPH
$$
Garuckas465
WWUS54 KMRX 271546
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
1146 AM EDT Sat Mar 27 2021
TNC179-271556-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-210327T1600Z/
Washington TN-
1146 AM EDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHINGTON 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 3627 8240 3636 8248 3637 8247 3640 8239
3641 8238 3639 8238 3640 8237 3640 8230
3636 8230 3628 8233
TIME...MOT...LOC 1545Z 254DEG 38KT 3635 8216
$$
GaruckasThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 5:03 AM EDT | Special Weather Statement | MRX | Marion, Sequatchie | 42 min |
| Mar 27, 5:23 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Marion, Sequatchie | 39 min |
| Mar 27, 5:47 AM EDT | Special Weather Statement | MRX | Hamilton | 43 min |
| Mar 27, 6:08 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 52 min |
| Mar 27, 6:41 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, Polk | 49 min |
| Mar 27, 7:46 AM EDT | Special Weather Statement | MRX | Roane | 44 min |
| Mar 27, 7:58 AM EDT | Severe Thunderstorm Warning | MRX | Morgan | 47 min |
| Mar 27, 8:27 AM EDT | Special Weather Statement | MRX | Scott | 48 min |
| Mar 27, 8:37 AM EDT | Special Weather Statement | MRX | Knox | 38 min |
| Mar 27, 8:42 AM EDT | Severe Thunderstorm Warning | MRX | Scott | 26 min |
| Mar 27, 8:58 AM EDT | Special Weather Statement | MRX | Knox, Loudon | 47 min |
| Mar 27, 9:18 AM EDT | Severe Thunderstorm Warning | MRX | Grainger, Knox, Union | 42 min |
| Mar 27, 9:39 AM EDT | Severe Thunderstorm Warning | MRX | Knox, Sevier | 30 min |
| Mar 27, 9:43 AM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hancock, Hawkins | 47 min |
| Mar 27, 10:00 AM EDT | Severe Thunderstorm Warning | MRX | Cocke, Hamblen, Jefferson | 45 min |
| Mar 27, 10:06 AM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 54 min |
| Mar 27, 10:14 AM EDT | Special Weather Statement | MRX | Anderson, Campbell, Morgan, Scott | 46 min |
| Mar 27, 10:30 AM EDT | Special Weather Statement | MRX | Hawkins | 45 min |
| Mar 27, 10:33 AM EDT | Severe Thunderstorm Warning | MRX | Greene | 42 min |
| Mar 27, 10:33 AM EDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne | 42 min |
| Mar 27, 10:36 AM EDT | Flash Flood Warning | MRX | Morgan, Scott | 4 hr |
| Mar 27, 10:41 AM EDT | Severe Thunderstorm Warning | MRX | Hawkins | 49 min |
| Mar 27, 10:51 AM EDT | Special Weather Statement | MRX | Anderson, Morgan | 39 min |
| Mar 27, 11:00 AM EDT | Special Weather Statement | MRX | Claiborne | 45 min |
| Mar 27, 11:07 AM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 38 min |
| Mar 27, 11:20 AM EDT | Special Weather Statement | MRX | Grainger, Hamblen, Union | 40 min |
| Mar 27, 11:30 AM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock | 22 min |
| Mar 27, 11:32 AM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson, Sullivan, Unicoi, Washington | 43 min |
| Mar 27, 11:45 AM EDT | Areal Flood Advisory | MRX | Hawkins, Sullivan | 3 hr |
| Mar 27, 11:46 AM EDT | Special Weather Statement | MRX | Hamblen, Jefferson | 44 min |
| Mar 27, 11:48 AM EDT | Areal Flood Advisory | MRX | Campbell, Claiborne | 3 hr |
| Mar 27, 11:50 AM EDT | Areal Flood Advisory | MRX | Carter, Greene, Washington | 3 hr |
| Mar 27, 11:56 AM EDT | Special Weather Statement | MRX | Monroe | 49 min |
| Mar 27, 12:07 PM EDT | Areal Flood Advisory | MRX | Anderson, Knox | 3 hr |
| Mar 27, 12:12 PM EDT | Areal Flood Advisory | MRX | Claiborne, Hancock | 3 hr |
| Mar 27, 12:17 PM EDT | Special Weather Statement | MRX | Johnson | 43 min |
| Mar 27, 12:23 PM EDT | Special Weather Statement | MRX | Hawkins | 52 min |
| Mar 27, 1:01 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson, Sullivan, Unicoi, Washington | 44 min |
| Mar 27, 3:13 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more | 23 hr |
| Mar 27, 3:34 PM EDT | Special Weather Statement | MRX | Campbell, Morgan | 41 min |
| Mar 27, 5:05 PM EDT | Areal Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 3 hr |
| Mar 27, 5:38 PM EDT | Areal Flood Warning | MRX | Claiborne, Grainger, Hancock, Hawkins, Union | 3 hr |
| Mar 27, 5:49 PM EDT | Special Weather Statement | MRX | Anderson, Morgan | 41 min |
| Mar 27, 6:13 PM EDT | Areal Flood Warning | MRX | Blount, Sevier | 3 hr |
| Mar 27, 6:59 PM EDT | Special Weather Statement | MRX | Morgan, Scott | 46 min |
| Mar 27, 7:02 PM EDT | Special Weather Statement | MRX | Marion, Sequatchie | 43 min |
| Mar 27, 7:15 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 45 min |
| Mar 27, 7:34 PM EDT | Special Weather Statement | MRX | Hancock | 41 min |
| Mar 27, 7:36 PM EDT | Special Weather Statement | MRX | Meigs | 39 min |
| Mar 27, 7:40 PM EDT | Special Weather Statement | MRX | Campbell, Scott | 50 min |
| Mar 27, 7:43 PM EDT | Severe Thunderstorm Warning | MRX | Marion | 47 min |
| Mar 27, 7:52 PM EDT | Special Weather Statement | MRX | Campbell | 53 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.