Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 191, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 7, 2023, 12:42 PM EDT for 7 counties in Tennessee. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2023, 12:42 PM EDT (16:42 UTC)
- Expired
- Aug 7, 2023, 1:45 PM EDT
- In force
- 63 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Campbell County, TN, Claiborne County, TN, Grainger County, TN, Hamblen County, TN, Jefferson County, TN, Knox County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 27 km from the middle of the area, began a volume at 16:41 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 7, 11:17 AM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 4.7 hours before the alert went out and 262 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
- 1827 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 809 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 355 m²/s²
- Significant tornado parameter
- 3.8
- Supercell composite
- 16.6
What 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 Aug 7, 9:49 AM EDT, 2 hours 53 minutes earlier.
Area forecast discussion, Aug 7, 9:49 AM EDT, 2 hours 53 minutes before
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</html>Hazardous weather outlook, Aug 7, 11:46 AM EDT, 56 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 1146 AM EDT Mon Aug 7 2023 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-081600- 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- 1146 AM EDT Mon Aug 7 2023 /1046 AM CDT Mon Aug 7 2023/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...This Afternoon and Tonight Thunderstorms are expected today, and some of these storms will likely become strong to severe. Primary risks will be damaging winds and large hail. There is also a threat of torrential downpours capable of producing localized flooding, and an tornadoes will be possible as well. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter reports may be needed today.
In the hours before
Special weather statement, Aug 7, 12:42 PM EDT, 0 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 |
|---|---|---|---|---|
| Aug 7, 11:21 AM EDT | Severe Thunderstorm Warning | MRX | Campbell, Morgan, Scott | 54 min |
| Aug 7, 12:11 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 64 min |
| Aug 7, 12:42 PM EDT | Special Weather Statement | MRX | Roane | 33 min |
| Aug 7, 1:08 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, McMinn, Meigs, Rhea, Roane and 1 more | 52 min |
| Aug 7, 1:11 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Grainger, Knox, Union | 49 min |
| Aug 7, 1:20 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Loudon, Roane | 40 min |
| Aug 7, 1:22 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 53 min |
| Aug 7, 1:35 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Knox, Loudon, Morgan, Rhea, Roane and 1 more | 55 min |
| Aug 7, 1:36 PM EDT | Severe Thunderstorm Warning | MRX | Marion | 39 min |
| Aug 7, 1:41 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Jefferson, Knox and 2 more | 64 min |
| Aug 7, 1:49 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Bradley, Hamilton, Loudon, McMinn, Meigs and 4 more | 41 min |
| Aug 7, 2:00 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Marion | 45 min |
| Aug 7, 2:02 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Blount, Grainger, Jefferson, Knox, Loudon and 4 more | 58 min |
| Aug 7, 2:09 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Cocke, Greene, Hawkins, Sullivan, Unicoi and 1 more | 66 min |
| Aug 7, 2:13 PM EDT | Flash Flood Warning | MRX | Cocke, Grainger, Hamblen, Jefferson | 4 hr |
| Aug 7, 2:16 PM EDT | Tornado Warning | MRX | Greene, Washington | 15 min |
| Aug 7, 2:20 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Bradley, Loudon, McMinn, Monroe, Polk and 1 more | 25 min |
| Aug 7, 2:24 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Polk | 51 min |
| Aug 7, 2:25 PM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Jefferson, Knox, Loudon, Roane and 1 more | 2 hr |
| Aug 7, 2:35 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Grainger, Union | 32 min |
| Aug 7, 2:39 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Cocke, Grainger, Greene, Hamblen, Jefferson and 3 more | 45 min |
| Aug 7, 2:42 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Monroe, Polk, Sevier | 33 min |
| Aug 7, 2:47 PM EDT | Areal Flood Advisory | MRX | Carter, Cocke, Greene, Hamblen, Hawkins, Unicoi and 1 more | 3 hr |
| Aug 7, 2:51 PM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton, Polk | 114 min |
| Aug 7, 3:04 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Cocke, Greene, Hamblen, Unicoi, Washington | 41 min |
| Aug 7, 3:06 PM EDT | Flash Flood Warning | MRX | Cocke, Greene, Hamblen | 2 hr |
| Aug 7, 3:09 PM EDT | Severe Thunderstorm Warning | MRX | Monroe, Polk | 36 min |
| Aug 7, 6:16 PM EDT | Special Weather Statement | MRX | Campbell | 44 min |
| Aug 7, 1:48 PM EDT | Special Weather Statement | MRX | Lee, Scott, Wise, City of Norton | 42 min |
| Aug 7, 3:42 PM EDT | Severe Thunderstorm Warning | MRX | Clay | 18 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.