Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 158, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 20, 2023, 2:51 PM EDT for Cherokee County, North Carolina; 4 counties in Tennessee. It was in force for 39 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
- Jul 20, 2023, 2:51 PM EDT (18:51 UTC)
- Expired
- Jul 20, 2023, 3:30 PM EDT
- In force
- 39 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cherokee County, NC, Bradley County, TN, McMinn County, TN, Monroe County, TN, Polk County, TN
The radar
The Northeast Alabama radar (KHTX), 146 km from the middle of the area, began a volume at 18:55 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 |
|---|---|---|---|
| Jul 20, 3:15 PM EDT | TSTM WND DMG | 2 Nne Benton, TN | Dispatch reported tree down near Patty Road. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 24 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.9 hours before the alert went out and 200 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
- 1702 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 908 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
726
WUUS54 KMRX 201851
SVRMRX
NCC039-TNC011-107-123-139-201930-
/O.NEW.KMRX.SV.W.0158.230720T1851Z-230720T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
251 PM EDT Thu Jul 20 2023
The National Weather Service in Morristown has issued a
* Severe Thunderstorm Warning for...
Southwestern Cherokee County in southwestern North Carolina...
East central Bradley County in east Tennessee...
Polk County in east Tennessee...
Southeastern McMinn County in east Tennessee...
Southwestern Monroe County in east Tennessee...
* Until 330 PM EDT.
* At 251 PM EDT, a severe thunderstorm was located near Benton,
moving southeast at 35 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...
Benton, Ducktown, Etowah, William L. Davenport Refuge, Violet,
Turtletown, Copperhill, Reliance, Bullet Creek and Archville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3524 8475 3537 8465 3520 8419 3499 8431
3499 8438
TIME...MOT...LOC 1851Z 299DEG 29KT 3525 8463
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CED1 follow-up statement
096
WWUS54 KMRX 201908
SVSMRX
Severe Weather Statement
National Weather Service Morristown TN
308 PM EDT Thu Jul 20 2023
TNC011-107-201917-
/O.CAN.KMRX.SV.W.0158.000000T0000Z-230720T1930Z/
Bradley TN-McMinn TN-
308 PM EDT Thu Jul 20 2023
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BRADLEY AND
SOUTHEASTERN MCMINN COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southwestern North Carolina...and east Tennessee.
LAT...LON 3516 8464 3528 8450 3520 8419 3499 8431
3499 8438
TIME...MOT...LOC 1907Z 307DEG 39KT 3514 8447
$$
NCC039-TNC123-139-201930-
/O.CON.KMRX.SV.W.0158.000000T0000Z-230720T1930Z/
Cherokee NC-Polk TN-Monroe TN-
308 PM EDT Thu Jul 20 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN CHEROKEE...EASTERN POLK AND SOUTH CENTRAL MONROE
COUNTIES...
At 307 PM EDT, a severe thunderstorm was located 8 miles northwest of
Ducktown, moving southeast at 45 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...
Benton, Ducktown, William L. Davenport Refuge, Violet, Turtletown,
Copperhill, Reliance, Archville and Hiwassee Ocoee State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3516 8464 3528 8450 3520 8419 3499 8431
3499 8438
TIME...MOT...LOC 1907Z 307DEG 39KT 3514 8447
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CEDWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 1:42 PM EDT, 1 hour 9 minutes earlier.
Area forecast discussion, Jul 20, 1:42 PM EDT, 1 hour 9 minutes before
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</html>Hazardous weather outlook, Jul 20, 4:01 AM EDT, 10 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 401 AM EDT Thu Jul 20 2023 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-210815- Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins- Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen- Northwest Cocke-Cocke Smoky Mountains-Northwest Greene- Southeast Greene-Washington TN-Unicoi-Northwest Carter- Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount- Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains- Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe- Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee- Wise-Scott VA-Russell-Washington VA- 401 AM EDT Thu Jul 20 2023 /301 AM CDT Thu Jul 20 2023/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight Showers and thunderstorms are expected to develop and move into the Cumberland Plateau and central Tennessee Valley this morning. These storms will be capable of producing heavy rainfall, which may lead to flash flooding. Strong wind gusts may also be possible with a few storms. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Showers and thunderstorms are expected primarily for the southern Tennessee valley Friday afternoon. These storms will be capable of heavy rainfall, which may lead to isolated flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today and Friday.
In the hours before
Local storm report, Jul 20, 11:04 AM EDT, 3 hours 47 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 12:28 PM EDT | Special Weather Statement | MRX | Cherokee | 32 min |
| Jul 20, 3:49 AM EDT | Flood Watch | MRX | Anderson, Bledsoe, Blount, Campbell, Knox, Loudon and 8 more | 16 hr |
| Jul 20, 7:58 AM EDT | Areal Flood Advisory | MRX | Blount, Knox, Sevier | 3 hr |
| Jul 20, 8:05 AM EDT | Areal Flood Advisory | MRX | Anderson, Campbell, Morgan, Scott | 3 hr |
| Jul 20, 8:28 AM EDT | Areal Flood Advisory | MRX | Sevier | 5 hr |
| Jul 20, 8:39 AM EDT | Special Weather Statement | MRX | Loudon, Monroe, Roane | 51 min |
| Jul 20, 8:49 AM EDT | Flash Flood Warning | MRX | Blount, Knox, Sevier | 4 hr |
| Jul 20, 9:06 AM EDT | Special Weather Statement | MRX | Bledsoe, Rhea | 54 min |
| Jul 20, 9:29 AM EDT | Flash Flood Warning | MRX | Blount, Sevier | 4 hr |
| Jul 20, 9:40 AM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Knox, Loudon, Meigs, Monroe and 3 more | 4 hr |
| Jul 20, 10:08 AM EDT | Areal Flood Advisory | MRX | Blount, Loudon, Monroe | 3 hr |
| Jul 20, 11:00 AM EDT | Flash Flood Warning | MRX | Morgan, Scott | 4 hr |
| Jul 20, 11:12 AM EDT | Special Weather Statement | MRX | Meigs | 33 min |
| Jul 20, 11:31 AM EDT | Flash Flood Warning | MRX | Bledsoe, Loudon, McMinn, Meigs, Rhea, Roane | 4 hr |
| Jul 20, 11:45 AM EDT | Areal Flood Advisory | MRX | McMinn, Monroe | 5 hr |
| Jul 20, 12:59 PM EDT | Flash Flood Warning | MRX | Sevier | 115 min |
| Jul 20, 1:15 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Meigs, Rhea, Roane | 25 min |
| Jul 20, 1:39 PM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Knox, Loudon, Monroe, Morgan and 2 more | 3 hr |
| Jul 20, 1:45 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea | 45 min |
| Jul 20, 2:16 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Polk, Rhea | 44 min |
| Jul 20, 2:19 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Meigs, Rhea | 3 hr |
| Jul 20, 3:02 PM EDT | Areal Flood Warning | MRX | Blount, Sevier | 3 hr |
| Jul 20, 3:18 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie | 42 min |
| Jul 20, 3:55 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 50 min |
| Jul 20, 4:34 PM EDT | Areal Flood Advisory | MRX | Morgan, Roane, Scott | 3 hr |
| Jul 20, 4:42 PM EDT | Special Weather Statement | MRX | Polk | 33 min |
| Jul 20, 4:44 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Loudon, McMinn, Meigs, Monroe, Rhea and 1 more | 3 hr |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2023Severe Thunderstorm Warnings in North Carolina, 2023Every severe thunderstorm warning in 2023
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.