Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 145, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 2, 2023, 5:45 PM EDT for 4 counties in Tennessee. It was in force for 28 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
- Jul 2, 2023, 5:45 PM EDT (21:45 UTC)
- Expired
- Jul 2, 2023, 6:13 PM EDT
- In force
- 28 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Grainger County, TN, Jefferson County, TN, Knox County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 25 km from the middle of the area, began a volume at 21:48 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 |
|---|---|---|---|
| Jul 2, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 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
- 1255 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
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 Jul 2, 4:05 PM EDT, 1 hour 40 minutes earlier.
Area forecast discussion, Jul 2, 4:05 PM EDT, 1 hour 40 minutes before
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</html>Hazardous weather outlook, Jul 2, 3:19 PM EDT, 2 hours 26 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 319 PM EDT Sun Jul 2 2023 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-031930- 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- 319 PM EDT Sun Jul 2 2023 /219 PM CDT Sun Jul 2 2023/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...This Afternoon and Tonight ...Severe Storms Through This Evening... Widespread storms are through this evening. Some of these storms will become severe with damaging winds and hail being the main threats. A low chance probability of a tornado across the northern Plateau counties. Besides the hail and wind, frequent lightning and heavy rains can also be expected with localized runoff problems possible. .DAYS TWO THROUGH SEVEN...Monday through Saturday There will be some showers and thunderstorms around Monday and Tuesday, and a few storms may become strong to severe especially during the afternoon hours with damaging winds being the primary threats. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed through this evening.
In the hours before
Local storm report, Jul 2, 4:15 PM EDT, 1 hour 30 minutes before
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</html>Local storm report, Jul 2, 4:18 PM EDT, 1 hour 27 minutes before
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</html>Local storm report, Jul 2, 4:37 PM EDT, 1 hour 8 minutes before
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</html>Special weather statement, Jul 2, 4:42 PM EDT, 1 hour 3 minutes before
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</html>Special weather statement, Jul 2, 5:29 PM EDT, 16 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 2, 8:01 AM EDT | Special Weather Statement | MRX | Campbell | 44 min |
| Jul 2, 8:11 AM EDT | Special Weather Statement | MRX | Anderson, Morgan | 49 min |
| Jul 2, 9:05 AM EDT | Special Weather Statement | MRX | Anderson | 40 min |
| Jul 2, 9:32 AM EDT | Special Weather Statement | MRX | Jefferson | 43 min |
| Jul 2, 9:45 AM EDT | Special Weather Statement | MRX | Claiborne | 45 min |
| Jul 2, 10:16 AM EDT | Special Weather Statement | MRX | Hamblen, Jefferson | 44 min |
| Jul 2, 3:03 PM EDT | Severe Thunderstorm Warning | MRX | Marion | 57 min |
| Jul 2, 3:40 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 50 min |
| Jul 2, 4:20 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 40 min |
| Jul 2, 4:42 PM EDT | Special Weather Statement | MRX | Anderson | 48 min |
| Jul 2, 4:54 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Polk | 51 min |
| Jul 2, 5:29 PM EDT | Special Weather Statement | MRX | Knox | 46 min |
| Jul 2, 10:07 AM EDT | Special Weather Statement | MRX | Wise, City of Norton | 38 min |
| Jul 2, 6:57 PM EDT | Special Weather Statement | MRX | Clay | 33 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.