Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 263, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 24, 2023, 1:25 PM EDT for 4 counties in Tennessee. It was in force for 50 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 24, 2023, 1:25 PM EDT (17:25 UTC)
- Expired
- Aug 24, 2023, 2:15 PM EDT
- In force
- 50 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Grainger County, TN, Jefferson County, TN, Knox County, TN, Union County, TN
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.4 hours before the alert went out and 318 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
- 844 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 973 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 24, 12:41 PM EDT, 44 minutes earlier.
Area forecast discussion, Aug 24, 12:41 PM EDT, 44 minutes before
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</html>Hazardous weather outlook, Aug 24, 3:21 AM EDT, 10 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 321 AM EDT Thu Aug 24 2023 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-250730- 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- 321 AM EDT Thu Aug 24 2023 /221 AM CDT Thu Aug 24 2023/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight Hot temperatures can be expected today, with a heat index reaching between 100 and 105 in the southern and central portions of the Tennessee Valley this afternoon. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Friday will be slightly hotter than today, especially south of Interstate 40 where heat index values will reach near to even above 105 degrees in most of the southern Tennessee Valley. Also, a few storms are possible on Friday, mainly north of Interstate 40 during the late afternoon and evening, some of which could be strong to severe. Isolated damaging wind gusts are the main concern with these storms. Saturday will remain hot with heat index values reaching 100 degrees or higher in the southern and central Tennessee Valley. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time.
In the hours before
Special weather statement, Aug 24, 12:51 PM EDT, 34 minutes before
Special Weather Statement
National Weather Service Morristown TN
1251 PM EDT Thu Aug 24 2023
TNZ015-016-VAZ001-005-241715-
Hancock TN-Hawkins TN-Scott VA-Lee VA-
1251 PM EDT Thu Aug 24 2023
...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL HAWKINS...
NORTHEASTERN HANCOCK...SOUTHEASTERN LEE AND SOUTHWESTERN SCOTT
COUNTIES THROUGH 115 PM EDT...
At 1251 PM EDT, Doppler radar was tracking a strong thunderstorm over
Jonesville, moving southeast at 40 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Rogersville, Jonesville, Surgoinsville, Pennington Gap, Church Hill,
Kyles Ford, and McCloud.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3653 8275 3636 8298 3671 8327 3674 8319
3674 8314 3675 8313 3677 8313 3679 8307
TIME...MOT...LOC 1651Z 325DEG 35KT 3666 8310
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
27Special weather statement, Aug 24, 1:16 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Morristown TN
116 PM EDT Thu Aug 24 2023
TNZ037-038-069-241800-
Union TN-Grainger TN-Knox TN-
116 PM EDT Thu Aug 24 2023
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN KNOX...WESTERN
GRAINGER AND EASTERN UNION COUNTIES THROUGH 200 PM EDT...
At 116 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Maynardville, moving south at 20 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Maynardville, Plainview, Blaine, Luttrell, Joppa, Rose Hill, Sharps
Chapel, and House Mountain State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3637 8374 3634 8373 3634 8371 3636 8369
3633 8366 3635 8359 3617 8357 3617 8358
3615 8359 3617 8360 3613 8361 3615 8364
3613 8364 3612 8363 3612 8368 3611 8387
3638 8382
TIME...MOT...LOC 1716Z 002DEG 16KT 3632 8371
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
27The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 11:18 AM EDT | Heat Advisory | MRX | Bradley, Hamilton, Marion, Sequatchie | 8 hr |
| Aug 24, 12:51 PM EDT | Special Weather Statement | MRX | Hawkins | 24 min |
| Aug 24, 1:16 PM EDT | Special Weather Statement | MRX | Union | 44 min |
| Aug 24, 1:48 PM EDT | Special Weather Statement | MRX | Jefferson | 27 min |
| Aug 24, 1:58 PM EDT | Special Weather Statement | MRX | Anderson | 47 min |
| Aug 24, 2:04 PM EDT | Special Weather Statement | MRX | Jefferson | 26 min |
| Aug 24, 2:35 PM EDT | Special Weather Statement | MRX | Sevier | 40 min |
| Aug 24, 3:08 PM EDT | Severe Thunderstorm Warning | MRX | Sevier | 10 min |
| Aug 24, 2:12 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.