Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 261, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 15, 2023, 12:35 AM CDT for 4 counties in Tennessee. It was in force for 40 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 15, 2023, 12:35 AM CDT (05:35 UTC)
- Expired
- Aug 15, 2023, 1:15 AM CDT
- In force
- 40 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Bledsoe County, TN, Hamilton County, TN, Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 79 km from the middle of the area, began a volume at 05:33 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 14, 7:33 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 5.6 hours before the alert went out and 144 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
- 636 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1097 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.5
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 15, 12:29 AM CDT, 6 minutes earlier.
Area forecast discussion, Aug 15, 12:29 AM CDT, 6 minutes before
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</html>Hazardous weather outlook, Aug 14, 2:12 PM CDT, 10 hours 23 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 312 PM EDT Mon Aug 14 2023 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-151915- 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- 312 PM EDT Mon Aug 14 2023 /212 PM CDT Mon Aug 14 2023/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...This Afternoon and Tonight Widespread thunderstorms are likely this evening with some being severe. All hazards are possible, including damaging straight line winds from 60 to 70 mph, large hail from 1 to 1.5 inches, and an isolated tornado. The tornado threat is greatest along and north of Interstate 40 with the other threats being more area- wide. Additionally, there is an elevated flooding concern this evening through the overnight hours due to saturated ground, abundant moisture, and multiple rounds of storms. It is possible for some places to see off and on rain for more than just a few hours into the morning hours. Scattered flash flooding is possible, depending on the coverage and persistence of convection. Also, hot conditions are expected to continue with many central and southern Tennessee Valley locations seeing heat indices close to 100 to 105 degrees, especially in and around Chattanooga. See the heat advisory for additional details, which is in effect for Marion, Hamilton, Bradley, and western Polk Counties until 8 PM EDT. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter reports are welcome this afternoon through tonight for severe thunderstorms and/or flash flooding.
In the hours before
Local storm report, Aug 14, 11:45 PM CDT, 50 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
1245 AM EDT Tue Aug 15 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1100 PM Flash Flood Athens 35.45N 84.60W
08/14/2023 McMinn TN Law Enforcement
Several reports of water over roads ranging
from less than a foot of water to totally
impassible. Including County Road 197 north
of Athens and County Road 436 east of
Athens.
&&
NWSpecial weather statement, Aug 14, 11:45 PM CDT, 50 minutes before
Special Weather Statement
National Weather Service Morristown TN
1245 AM EDT Tue Aug 15 2023
NCZ061-150515-
Clay NC-
1245 AM EDT Tue Aug 15 2023
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN CLAY COUNTY THROUGH
115 AM EDT...
At 1245 AM EDT, Doppler radar was tracking a strong thunderstorm near
Nantahala Lake, or 10 miles southeast of Andrews, moving east at 25
mph.
HAZARD...Wind gusts up to 40 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until 300 AM EDT for
southwestern North Carolina.
&&
LAT...LON 3511 8387 3514 8386 3514 8382 3516 8377
3516 8374 3515 8373 3515 8372 3516 8365
3515 8364 3514 8366 3514 8364 3512 8364
3513 8362 3511 8362 3509 8359 3506 8356
TIME...MOT...LOC 0445Z 279DEG 21KT 3513 8366
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SRSpecial weather statement, Aug 14, 11:50 PM CDT, 45 minutes before
Special Weather Statement
National Weather Service Morristown TN
1250 AM EDT Tue Aug 15 2023
NCZ060-061-TNZ087-150530-
Clay NC-Cherokee NC-Southeast Monroe TN-
1250 AM EDT Tue Aug 15 2023
...A STRONG THUNDERSTORM WILL IMPACT CHEROKEE AND CLAY COUNTIES
THROUGH 130 AM EDT...
At 1250 AM EDT, Doppler radar was tracking a strong thunderstorm near
Murphy, moving east at 25 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Andrews, Murphy, Hayesville, Shooting Creek, Tusquitee, Hiawasse Dam,
Marble, Brasstown, and Unaka.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until 300 AM EDT for
southwestern North Carolina...and east Tennessee.
&&
LAT...LON 3503 8432 3508 8431 3534 8403 3523 8400
3522 8396 3526 8384 3525 8373 3517 8374
3511 8388 3506 8356 3499 8350
TIME...MOT...LOC 0450Z 275DEG 23KT 3519 8406
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPHLocal storm report, Aug 15, 12:00 AM CDT, 35 minutes before
Preliminary Local Storm Report
National Weather Service Morristown TN
100 AM EDT Tue Aug 15 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1010 PM Tstm Wnd Dmg 2 NW Colonial Heights 36.50N 82.54W
08/14/2023 Sullivan TN Law Enforcement
Trees blown down on Moreland Drive.
&&
NWLocal storm report, Aug 15, 12:09 AM CDT, 26 minutes before
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</html>Special weather statement, Aug 15, 12:20 AM CDT, 15 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 14, 7:00 PM CDT | Severe Thunderstorm Warning | MRX | Anderson, Knox, Union | 45 min |
| Aug 14, 7:18 PM CDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Rhea | 42 min |
| Aug 14, 7:31 PM CDT | Severe Thunderstorm Warning | MRX | Grainger, Jefferson, Knox, Sevier, Union | 44 min |
| Aug 14, 7:45 PM CDT | Severe Thunderstorm Warning | MRX | Blount, Knox, Loudon | 60 min |
| Aug 14, 7:56 PM CDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock, Hawkins | 49 min |
| Aug 14, 7:58 PM CDT | Severe Thunderstorm Warning | MRX | Cocke, Greene, Hamblen, Jefferson | 47 min |
| Aug 14, 7:59 PM CDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Meigs, Monroe, Polk | 46 min |
| Aug 14, 8:03 PM CDT | Severe Thunderstorm Warning | MRX | Grainger, Hamblen, Jefferson | 42 min |
| Aug 14, 8:12 PM CDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock | 25 min |
| Aug 14, 8:21 PM CDT | Areal Flood Advisory | MRX | Anderson, Grainger, Jefferson, Knox, Union | 11 min |
| Aug 14, 8:27 PM CDT | Severe Thunderstorm Warning | MRX | Hawkins, Sullivan | 48 min |
| Aug 14, 8:32 PM CDT | Flash Flood Warning | MRX | Anderson, Grainger, Jefferson, Knox, Union | 3 hr |
| Aug 14, 8:34 PM CDT | Severe Thunderstorm Warning | MRX | Greene, Hancock, Hawkins | 41 min |
| Aug 14, 8:38 PM CDT | Tornado Warning | MRX | Hawkins | 52 min |
| Aug 14, 8:42 PM CDT | Severe Thunderstorm Warning | MRX | Grainger, Hamblen, Hawkins, Jefferson | 29 min |
| Aug 14, 8:44 PM CDT | Severe Thunderstorm Warning | MRX | McMinn, Monroe, Polk | 46 min |
| Aug 14, 8:45 PM CDT | Severe Thunderstorm Warning | MRX | Greene, Hawkins, Sullivan, Washington | 45 min |
| Aug 14, 8:50 PM CDT | Tornado Warning | MRX | Greene, Hawkins, Sullivan, Washington | 40 min |
| Aug 14, 9:09 PM CDT | Tornado Warning | MRX | Carter, Sullivan, Washington | 51 min |
| Aug 14, 9:10 PM CDT | Flash Flood Warning | MRX | Hancock, Hawkins | 4 hr |
| Aug 14, 9:32 PM CDT | Severe Thunderstorm Warning | MRX | McMinn, Monroe | 43 min |
| Aug 14, 9:38 PM CDT | Flash Flood Warning | MRX | McMinn, Meigs, Polk | 5 hr |
| Aug 14, 9:42 PM CDT | Tornado Warning | MRX | Carter, Johnson, Sullivan | 63 min |
| Aug 14, 9:46 PM CDT | Severe Thunderstorm Warning | MRX | Anderson, Knox, Morgan, Roane | 44 min |
| Aug 14, 9:53 PM CDT | Special Weather Statement | MRX | Monroe | 52 min |
| Aug 14, 10:17 PM CDT | Flash Flood Warning | MRX | McMinn, Monroe | 6 hr |
| Aug 14, 10:23 PM CDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 52 min |
| Aug 14, 10:35 PM CDT | Special Weather Statement | MRX | McMinn, Monroe | 40 min |
| Aug 14, 10:54 PM CDT | Flash Flood Warning | MRX | Monroe | 5 hr |
| Aug 14, 10:56 PM CDT | Severe Thunderstorm Warning | MRX | Carter, Cocke, Greene, Hawkins, Johnson, Unicoi and 1 more | 64 min |
| Aug 14, 11:12 PM CDT | Flash Flood Warning | MRX | Cocke, Greene, Hamblen, Jefferson | 5 hr |
| Aug 14, 11:16 PM CDT | Special Weather Statement | MRX | Monroe | 29 min |
| Aug 14, 11:52 PM CDT | Tornado Warning | MRX | Carter, Johnson | 16 min |
| Aug 15, 12:17 AM CDT | Flash Flood Warning | MRX | Monroe | 4 hr |
| Aug 15, 12:20 AM CDT | Special Weather Statement | MRX | Bledsoe, Rhea, Sequatchie | 40 min |
| Aug 15, 12:50 AM CDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 25 min |
| Aug 15, 12:58 AM CDT | Special Weather Statement | MRX | Loudon, Meigs | 47 min |
| Aug 15, 1:38 AM CDT | Special Weather Statement | MRX | Polk | 52 min |
| Aug 15, 1:56 AM CDT | Special Weather Statement | MRX | Monroe | 34 min |
| Aug 15, 2:16 AM CDT | Areal Flood Advisory | MRX | Carter, Cocke, Greene, Hamblen, Hawkins, Jefferson and 3 more | 7 hr |
| Aug 15, 2:21 AM CDT | Flash Flood Warning | MRX | Blount, Monroe | 98 min |
| Aug 15, 2:25 AM CDT | Areal Flood Advisory | MRX | Blount, Cocke, Knox, Loudon, McMinn, Monroe and 1 more | 7 hr |
| Aug 15, 2:39 AM CDT | Areal Flood Advisory | MRX | McMinn, Meigs, Polk | 4 hr |
| Aug 15, 3:57 AM CDT | Areal Flood Warning | MRX | Cocke, Greene, Hamblen, Jefferson | 2 hr |
| Aug 15, 3:59 AM CDT | Areal Flood Warning | MRX | Blount, Monroe | 6 hr |
| Aug 15, 4:04 AM CDT | Areal Flood Advisory | MRX | Monroe | 116 min |
| Aug 15, 4:07 AM CDT | Areal Flood Warning | MRX | McMinn, Monroe | 6 hr |
| Aug 15, 4:09 AM CDT | Areal Flood Warning | MRX | Monroe | 6 hr |
| Aug 14, 10:55 PM CDT | Special Weather Statement | MRX | Cherokee | 35 min |
| Aug 14, 11:45 PM CDT | Special Weather Statement | MRX | Clay | 30 min |
| Aug 14, 11:50 PM CDT | Special Weather Statement | MRX | Cherokee, Clay | 40 min |
| Aug 15, 2:31 AM CDT | Special Weather Statement | MRX | Cherokee, Clay | 44 min |
| Aug 15, 3:11 AM CDT | Flash Flood Warning | MRX | Cherokee, Clay | 81 min |
| Aug 15, 3:11 AM CDT | Special Weather Statement | MRX | Clay | 19 min |
| Aug 15, 4:32 AM CDT | Areal Flood Advisory | MRX | Cherokee, Clay | 103 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.