Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Morristown, TN

March 27, 20214 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Mar 27, 2021, 9:48 PM EDT for 4 counties in Tennessee. It was in force for 24 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: Mar 27, 2021, 9:48 PM EDT (01:48 UTC)
Expired: Mar 27, 2021, 10:12 PM EDT
In force: 24 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, TN, Greene County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 103 km from the middle of the area, began a volume at 01:47 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, 10:01 PM EDT	HAIL 1	2 N Leesburg, TN

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 00:00Z, 1.8 hours before the alert went out and 212 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

962 
WUUS54 KMRX 280148
SVRMRX
TNC019-059-171-179-280230-
/O.NEW.KMRX.SV.W.0032.210328T0148Z-210328T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
948 PM EDT Sat Mar 27 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Washington County in east Tennessee...
  Northeastern Greene County in east Tennessee...
  Unicoi County in east Tennessee...
  Southern Carter County in east Tennessee...

* Until 1030 PM EDT.

* At 948 PM EDT, a severe thunderstorm was located 8 miles northeast
  of Tusculum, or 11 miles northeast of Greeneville, moving east at
  55 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...
  Johnson City, Greeneville, Elizabethton, Erwin, Jonesborough,
  Tusculum, Banner Hill, Midway, Pine Crest and Hampton.

This includes the following highways...
 Interstate 26 in Tennessee between mile markers 22 and 43.
 Interstate 81 in Tennessee between mile markers 43 and 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3612 8203 3612 8205 3610 8208 3611 8213
      3615 8215 3614 8218 3616 8222 3613 8225
      3614 8226 3613 8228 3614 8229 3612 8235
      3609 8241 3606 8243 3622 8283 3640 8271
      3626 8194
TIME...MOT...LOC 0148Z 282DEG 47KT 3629 8269 

HAIL...1.00IN
WIND...60MPH
 
$$

Diegan

2 follow-up statements

551 
WWUS54 KMRX 280156
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
956 PM EDT Sat Mar 27 2021

TNC059-280206-
/O.CAN.KMRX.SV.W.0032.000000T0000Z-210328T0230Z/
Greene TN-
956 PM EDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GREENE 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 3612 8203 3612 8205 3610 8208 3611 8213
      3615 8215 3614 8218 3616 8222 3613 8225
      3614 8226 3613 8228 3614 8229 3609 8241
      3619 8265 3635 8264 3638 8262 3626 8194
TIME...MOT...LOC 0156Z 282DEG 47KT 3627 8256 

$$

TNC019-171-179-280230-
/O.CON.KMRX.SV.W.0032.000000T0000Z-210328T0230Z/
Washington TN-Unicoi TN-Carter TN-
956 PM EDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR WASHINGTON...NORTHERN UNICOI AND SOUTHERN CARTER COUNTIES...

At 956 PM EDT, a severe thunderstorm was located near Jonesborough,
or 11 miles southwest of Johnson City, moving east at 55 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...
Johnson City, Elizabethton, Erwin, Jonesborough, Banner Hill,
Hampton, Midway, Pine Crest, Central and Unicoi.

This includes Interstate 26 in Tennessee between mile markers 22 and
40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3612 8203 3612 8205 3610 8208 3611 8213
      3615 8215 3614 8218 3616 8222 3613 8225
      3614 8226 3613 8228 3614 8229 3609 8241
      3619 8265 3635 8264 3638 8262 3626 8194
TIME...MOT...LOC 0156Z 282DEG 47KT 3627 8256 

HAIL...1.00IN
WIND...60MPH
 
$$

Diegan

626 
WWUS54 KMRX 280212
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
1012 PM EDT Sat Mar 27 2021

TNC019-171-179-280221-
/O.CAN.KMRX.SV.W.0032.000000T0000Z-210328T0230Z/
Washington TN-Unicoi TN-Carter TN-
1012 PM EDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON...NORTHERN UNICOI
AND SOUTHERN CARTER COUNTIES IS CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3612 8203 3612 8205 3610 8208 3611 8213
      3615 8215 3614 8218 3616 8222 3613 8225
      3614 8226 3613 8228 3614 8229 3609 8241
      3619 8265 3635 8264 3638 8262 3626 8194
TIME...MOT...LOC 0209Z 282DEG 47KT 3623 8232 

$$

Diegan

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 27, 8:05 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne, Grainger, Hancock, Union	40 min
Mar 27, 8:09 PM EDT	Flash Flood Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	3 hr
Mar 27, 8:11 PM EDT	Special Weather Statement	MRX	Sequatchie	49 min
Mar 27, 8:12 PM EDT	Special Weather Statement	MRX	Sequatchie	48 min
Mar 27, 8:31 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan	44 min
Mar 27, 8:36 PM EDT	Areal Flood Warning	MRX	Claiborne, Grainger, Hancock, Hawkins, Sullivan, Union	3 hr
Mar 27, 8:43 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Grainger, Hamblen, Hancock, Hawkins	47 min
Mar 27, 8:55 PM EDT	Areal Flood Advisory	MRX	Bledsoe, Hamilton, Marion, Rhea, Sequatchie	3 hr
Mar 27, 8:57 PM EDT	Special Weather Statement	MRX	Sullivan	48 min
Mar 27, 9:02 PM EDT	River Flood Warning	MRX	Morgan, Roane	24 hr
Mar 27, 9:10 PM EDT	Special Weather Statement	MRX	Jefferson	50 min
Mar 27, 9:21 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hamblen, Hawkins, Washington	39 min
Mar 27, 9:22 PM EDT	Special Weather Statement	MRX	Loudon	38 min
Mar 27, 9:25 PM EDT	Special Weather Statement	MRX	Loudon	50 min
Mar 27, 9:42 PM EDT	Special Weather Statement	MRX	Knox	48 min
Mar 27, 9:50 PM EDT	Special Weather Statement	MRX	Johnson	40 min
Mar 27, 10:00 PM EDT	Special Weather Statement	MRX	Greene, Unicoi	45 min
Mar 27, 10:19 PM EDT	Areal Flood Advisory	MRX	Carter, Greene, Hawkins, Sullivan, Washington	3 hr
Mar 27, 10:32 PM EDT	Special Weather Statement	MRX	Anderson, Campbell, Morgan	43 min
Mar 27, 11:13 PM EDT	Flash Flood Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	3 hr
Mar 27, 11:37 PM EDT	Areal Flood Warning	MRX	Claiborne, Grainger, Hancock, Hawkins, Sullivan, Union	3 hr
Mar 28, 12:14 AM EDT	Special Weather Statement	MRX	Claiborne, Grainger, Union	46 min
Mar 28, 12:18 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Grainger, Union	57 min
Mar 28, 12:35 AM EDT	Special Weather Statement	MRX	Campbell, Morgan, Scott	40 min
Mar 28, 12:41 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen	34 min
Mar 28, 12:55 AM EDT	Special Weather Statement	MRX	Hamblen, Hancock, Hawkins	50 min
Mar 28, 1:14 AM EDT	Flash Flood Warning	MRX	Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	3 hr
Mar 28, 1:18 AM EDT	Special Weather Statement	MRX	Campbell, Claiborne, Union	42 min
Mar 28, 1:39 AM EDT	Special Weather Statement	MRX	Sullivan	51 min
Mar 28, 1:43 AM EDT	Areal Flood Warning	MRX	Carter, Johnson, Sullivan, Washington	3 hr
Mar 28, 1:47 AM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins, Sullivan, Washington	43 min
Mar 28, 2:11 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	3 hr
Mar 28, 2:18 AM EDT	Severe Thunderstorm Warning	MRX	Johnson, Sullivan	42 min
Mar 28, 2:58 AM EDT	Flash Flood Warning	MRX	Carter, Johnson, Sullivan, Washington	3 hr
Mar 28, 3:12 AM EDT	Special Weather Statement	MRX	Morgan, Scott	48 min
Mar 28, 4:04 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	7 hr
Mar 28, 4:09 AM EDT	Special Weather Statement	MRX	Campbell, Morgan, Scott	51 min
Mar 28, 4:16 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Sullivan	3 hr
Mar 28, 4:27 AM EDT	Special Weather Statement	MRX	Bledsoe	63 min
Mar 28, 4:58 AM EDT	Special Weather Statement	MRX	Anderson, Campbell, Claiborne, Morgan	47 min
Mar 28, 5:03 AM EDT	Special Weather Statement	MRX	Meigs, Rhea, Roane	42 min
Mar 28, 5:07 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	5 hr
Mar 28, 5:15 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Union	17 min
Mar 28, 5:26 AM EDT	Areal Flood Advisory	MRX	Bledsoe, Rhea, Sequatchie	71 min
Mar 28, 5:38 AM EDT	Special Weather Statement	MRX	Grainger, Hancock, Union	52 min
Mar 28, 5:43 AM EDT	Special Weather Statement	MRX	Anderson, Knox	47 min
Mar 28, 5:43 AM EDT	Severe Thunderstorm Warning	MRX	Marion	47 min
Mar 28, 5:48 AM EDT	Special Weather Statement	MRX	Meigs, Rhea, Roane	42 min
Mar 28, 6:08 AM EDT	Special Weather Statement	MRX	Hawkins	52 min
Mar 28, 6:19 AM EDT	Special Weather Statement	MRX	Hamilton, McMinn	41 min
Mar 28, 6:34 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Hancock, Hawkins, Jefferson, Sevier	41 min
Mar 28, 6:36 AM EDT	Flash Flood Warning	MRX	Bledsoe, Marion, Rhea, Sequatchie	6 hr
Mar 28, 6:40 AM EDT	Flash Flood Warning Considerable damage threat	MRX	Anderson, Knox, Loudon, Morgan, Roane, Union	5 hr
Mar 28, 6:43 AM EDT	Special Weather Statement	MRX	Knox, Loudon, Meigs, Roane	47 min
Mar 28, 6:51 AM EDT	Special Weather Statement	MRX	Bradley, McMinn, Monroe, Polk	39 min
Mar 28, 7:08 AM EDT	Flash Flood Warning	MRX	Sullivan	6 hr
Mar 28, 7:15 AM EDT	Special Weather Statement	MRX	Cocke, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	45 min
Mar 28, 7:17 AM EDT	Flash Flood Warning	MRX	Bradley, Hamilton, McMinn, Meigs, Rhea, Sequatchie	6 hr
Mar 28, 7:27 AM EDT	Special Weather Statement	MRX	Blount, Sevier	33 min
Mar 28, 7:27 AM EDT	Special Weather Statement	MRX	Polk	63 min
Mar 28, 7:34 AM EDT	River Flood Warning	MRX	Claiborne, Grainger, Hancock	51 hr
Mar 28, 7:41 AM EDT	River Flood Warning	MRX	Claiborne, Union	52 hr
Mar 28, 7:46 AM EDT	River Flood Warning	MRX	Hawkins, Sullivan	35 hr
Mar 28, 7:49 AM EDT	Flash Flood Warning	MRX	Grainger, Hamblen, Jefferson, Knox, Sevier	5 hr
Mar 28, 7:52 AM EDT	Flash Flood Warning	MRX	Bradley, Hamilton, Polk	5 hr
Mar 28, 8:00 AM EDT	Special Weather Statement	MRX	Carter, Cocke, Greene, Hawkins, Sullivan, Unicoi and 1 more	45 min
Mar 28, 8:03 AM EDT	Flash Flood Warning	MRX	Blount, Knox, Loudon, McMinn, Monroe, Polk and 1 more	4 hr
Mar 28, 8:21 AM EDT	Special Weather Statement	MRX	Sevier	24 min
Mar 28, 8:26 AM EDT	Flash Flood Warning	MRX	Blount, Cocke, Sevier	5 hr
Mar 28, 8:43 AM EDT	Flash Flood Warning	MRX	Greene, Hawkins, Unicoi, Washington	4 hr
Mar 28, 8:45 AM EDT	Flash Flood Warning	MRX	Carter, Johnson	4 hr
Mar 28, 9:05 AM EDT	River Flood Warning	MRX	Hancock	23 hr
Mar 28, 9:32 AM EDT	River Flood Warning	MRX	Cocke	20 hr
Mar 28, 10:08 AM EDT	Areal Flood Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	21 hr
Mar 28, 11:07 AM EDT	River Flood Warning	MRX	Hancock	33 hr
Mar 28, 11:10 AM EDT	Areal Flood Warning	MRX	Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	21 hr
Mar 28, 11:11 AM EDT	Areal Flood Warning	MRX	Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more	20 hr
Mar 28, 11:43 AM EDT	Areal Flood Warning	MRX	Anderson, Knox, Loudon, Morgan, Roane	3 hr
Mar 28, 12:38 PM EDT	Areal Flood Warning	MRX	Greene, Hawkins, Unicoi, Washington	3 hr
Mar 28, 12:43 PM EDT	Areal Flood Warning	MRX	Carter, Johnson	5 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021 Every 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.