Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Morristown, TN

March 27, 20215 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Mar 27, 2021, 11:32 AM EDT for 5 counties in Tennessee. It was in force for 43 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: Mar 27, 2021, 11:32 AM EDT (15:32 UTC)
Expired: Mar 27, 2021, 12:15 PM EDT
In force: 43 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Carter County, TN, Johnson County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 144 km from the middle of the area, began a volume at 15:32 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, 11:41 AM EDT	HAIL 1	1 E Elizabethton, TN	REPORT FROM MPING: QUARTER (1.00 IN.).
Mar 27, 12:19 PM EDT	HAIL 0.7	Mountain City, 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 12:00Z, 3.5 hours before the alert went out and 180 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

242 
WUUS54 KMRX 271532
SVRMRX
TNC019-091-163-171-179-271615-
/O.NEW.KMRX.SV.W.0023.210327T1532Z-210327T1615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
1132 AM EDT Sat Mar 27 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Eastern Sullivan County in east Tennessee...
  Northeastern Washington County in east Tennessee...
  Northeastern Unicoi County in east Tennessee...
  Johnson County in east Tennessee...
  Central Carter County in east Tennessee...

* Until 1215 PM EDT.

* At 1132 AM EDT, a severe thunderstorm was located over Johnson
  City, moving northeast 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, Elizabethton, Mountain City, Central, Hampton, Pine
  Crest, Unicoi, Bluff City, Watauga and Hunter.

This includes Interstate 26 in Tennessee between mile markers 21 and
29.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3657 8169 3655 8169 3653 8171 3647 8170
      3646 8171 3642 8172 3640 8174 3620 8232
      3640 8239 3660 8206 3659 8194 3662 8192
      3661 8170 3657 8168
TIME...MOT...LOC 1532Z 243DEG 44KT 3631 8237 

HAIL...1.50IN
WIND...<50MPH
 
$$

Garuckas

2 follow-up statements

341 
WWUS54 KMRX 271552 RRA
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
1152 AM EDT Sat Mar 27 2021

TNC171-179-271602-
/O.CAN.KMRX.SV.W.0023.000000T0000Z-210327T1615Z/
Washington TN-Unicoi TN-
1152 AM EDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHINGTON AND
NORTHEASTERN UNICOI 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 3628 8214 3645 8225 3659 8198 3659 8194
      3662 8192 3661 8170 3657 8168 3657 8169
      3655 8169 3653 8171 3647 8170 3646 8171
      3643 8172
TIME...MOT...LOC 1552Z 243DEG 44KT 3642 8210 

$$

TNC019-091-163-271615-
/O.CON.KMRX.SV.W.0023.000000T0000Z-210327T1615Z/
Sullivan TN-Johnson TN-Carter TN-
1152 AM EDT Sat Mar 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM EDT
FOR EASTERN SULLIVAN...JOHNSON AND NORTHEASTERN CARTER COUNTIES...

At 1152 AM EDT, a severe thunderstorm was located 9 miles northeast
of Elizabethton, moving northeast at 50 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Elizabethton, Mountain City, South Holston Dam, Hunter, Morril's
Cave, Doeville, Neva, Laurel Bloomery, Sadie and Shady Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3628 8214 3645 8225 3659 8198 3659 8194
      3662 8192 3661 8170 3657 8168 3657 8169
      3655 8169 3653 8171 3647 8170 3646 8171
      3643 8172
TIME...MOT...LOC 1552Z 243DEG 44KT 3642 8210 

HAIL...1.00IN
WIND...<50MPH
 
$$

Garuckas

045 
WWUS54 KMRX 271619
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
1219 PM EDT Sat Mar 27 2021

TNC019-091-163-271629-
/O.EXP.KMRX.SV.W.0023.000000T0000Z-210327T1615Z/
Sullivan TN-Johnson TN-Carter TN-
1219 PM EDT Sat Mar 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SULLIVAN...JOHNSON AND
NORTHEASTERN CARTER COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

LAT...LON 3628 8214 3645 8225 3659 8198 3659 8194
      3662 8192 3661 8170 3657 8168 3657 8169
      3655 8169 3653 8171 3647 8170 3646 8171
      3643 8172
TIME...MOT...LOC 1619Z 243DEG 44KT 3656 8177 

$$

Garuckas

The 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, 11:11 AM EDT	Severe Thunderstorm Warning	MRX	Unicoi, Washington	35 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, 11:45 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, 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.