Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 165, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 21, 2018, 5:53 PM EDT for Bradley County, Hamilton County, Tennessee. It was in force for 37 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 21, 2018, 5:53 PM EDT (21:53 UTC)
- Expired
- Jul 21, 2018, 6:30 PM EDT
- In force
- 37 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bradley County, TN, Hamilton County, TN
The radar
The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 21:53 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.9 hours before the alert went out and 179 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
- 682 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 826 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 10.6
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 Jul 21, 3:19 PM EDT, 2 hours 34 minutes earlier.
Area forecast discussion, Jul 21, 3:19 PM EDT, 2 hours 34 minutes before
Area Forecast Discussion National Weather Service Morristown TN 319 PM EDT Sat Jul 21 2018 .SHORT TERM...(Tonight and Sunday)... Water vapor satellite imagery shows the closed upper low to our northwest, over southern Indiana and parts of the Ohio River Valley this afternoon. Locally, skies were rather clear earlier this day across the forecast area. However with good insolation the atmosphere has recovered and the CU field has really perked up over the plateau and mountain areas. Given this, plus some showers showing up on radar over southeast Kentucky and along the plateau, still think that at least some scattered showers and thunderstorms will develop across the forecast area this afternoon and evening, especially the northern half. The upper low will drop south tonight and Sunday, which will again lead to unstable conditions. Severe weather is not likely, but another round of afternoon showers is expected. .LONG TERM...(Sunday night through Friday)... Low pressure system that is expected to move over the area will continue to be the biggest weather influencer through next week. This will lead to a general pattern of cloudy skies, near/below average temperatures, and persistent rain chances. A couple of fronts and ripples of energy from the north will dive down during the week, and this will lead to enhanced rain and thunderstorm chances... But currently forecast models do not indicate any particular day to have strong signal for widespread severe weather during the upcoming work week. Due to the recent rainfalls and with the potential for some locations to see several days of showers and/or thunderstorms we could see the potential for flooding in areas that see heavy rain this upcoming week. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 69 85 68 84 / 50 60 40 60 Knoxville McGhee Tyson Airport, TN 68 81 66 83 / 50 70 50 60 Oak Ridge, TN 68 82 67 83 / 50 70 40 60 Tri Cities Airport, TN 66 79 64 82 / 60 70 50 70 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && CD/ABM
Hazardous weather outlook, Jul 21, 3:28 PM EDT, 2 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 328 PM EDT Sat Jul 21 2018 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-221930- 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-NW 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-Russell-Washington- 328 PM EDT Sat Jul 21 2018 /228 PM CDT Sat Jul 21 2018/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...This Afternoon and Tonight Scattered showers and thunderstorms are expected this afternoon through late this evening. Widespread severe storms are not expected. However a few strong storms could develop, with damaging winds and large hail a possibility. .DAYS TWO THROUGH SEVEN...Sunday through Friday Not hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon.
In the hours before
Special weather statement, Jul 21, 4:59 PM EDT, 54 minutes before
Special Weather Statement
National Weather Service Morristown TN
459 PM EDT SAT JUL 21 2018
VAZ001-002-005-212200-
Scott VA-Wise VA-Lee VA-
459 PM EDT SAT JUL 21 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LEE...CENTRAL SCOTT
AND SOUTHWESTERN WISE COUNTIES UNTIL 600 PM EDT...
At 459 PM EDT, Doppler radar was tracking a strong thunderstorm near
Clover Fork, or 15 miles northeast of Jonesville, moving east at 25
mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Gate City, Big Stone Gap, Appalachia, Dungannon, Duffield,
Clinchport, Jasper, Fort Blackmore and Dryden.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3683 8247 3663 8256 3677 8302 3686 8298
3687 8291 3690 8287 3691 8287 3692 8286
TIME...MOT...LOC 2059Z 290DEG 20KT 3683 8290
05/MASpecial weather statement, Jul 21, 5:12 PM EDT, 41 minutes before
Special Weather Statement
National Weather Service Morristown TN
512 PM EDT SAT JUL 21 2018
TNZ083>085-099-100-212215-
Rhea TN-Bradley TN-Hamilton TN-Meigs TN-McMinn TN-
512 PM EDT SAT JUL 21 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL RHEA...NORTHERN
BRADLEY...SOUTHWESTERN MEIGS...SOUTHWESTERN MCMINN AND NORTHEASTERN
HAMILTON COUNTIES UNTIL 615 PM EDT...
At 512 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Dayton, moving southeast at 15 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Cleveland, Dayton, Charleston, Graysville, Calhoun, Sale Creek,
Hillsview, Hopewell, Birchwood, Big Spring, Tasso and Dentville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3535 8515 3550 8503 3531 8457 3527 8460
3527 8467 3525 8469 3524 8471 3523 8471
3523 8470 3517 8470 3513 8472
TIME...MOT...LOC 2112Z 302DEG 15KT 3539 8502
05/MASpecial weather statement, Jul 21, 5:33 PM EDT, 20 minutes before
Special Weather Statement
National Weather Service Morristown TN
533 PM EDT SAT JUL 21 2018
TNZ085>087-102-212215-
Northwest Monroe TN-East Polk TN-Southeast Monroe TN-McMinn TN-
533 PM EDT SAT JUL 21 2018
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL POLK...SOUTHEASTERN
MCMINN AND SOUTHWESTERN MONROE COUNTIES UNTIL 615 PM EDT...
At 533 PM EDT, Doppler radar was tracking a strong thunderstorm near
Etowah, or 11 miles southeast of Athens, moving southeast at 15 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Etowah, Tellico Plains, Bullet Creek, Coker Creek and Mount Vernon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3512 8432 3521 8440 3524 8437 3527 8447
3534 8453 3545 8442 3525 8410 3525 8412
3524 8413 3525 8414 3524 8419 3527 8421
3527 8423 3522 8429
TIME...MOT...LOC 2133Z 314DEG 14KT 3533 8445
!05/MASpecial weather statement, Jul 21, 5:43 PM EDT, 10 minutes before
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</html>Special weather statement, Jul 21, 5:44 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Morristown TN
544 PM EDT SAT JUL 21 2018
TNZ014-015-038-212230-
Claiborne TN-Hancock TN-Grainger TN-
544 PM EDT SAT JUL 21 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CLAIBORNE...
SOUTHWESTERN HANCOCK AND GRAINGER COUNTIES UNTIL 630 PM EDT...
At 544 PM EDT, Doppler radar was tracking a strong thunderstorm near
New Tazewell, or 8 miles northwest of Rutledge, moving east at 25
mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Rutledge, New Tazewell, Bean Station, Tazewell, Springdale, Lone
Mountain, Thorn Hill, Treadway and Sandlick.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3643 8320 3641 8322 3640 8328 3638 8329
3634 8326 3632 8328 3629 8326 3628 8328
3626 8328 3627 8331 3630 8333 3628 8334
3628 8336 3624 8342 3622 8342 3628 8369
3635 8367 3636 8370 3636 8371 3646 8369
TIME...MOT...LOC 2144Z 279DEG 21KT 3636 8362
05/MASpecial weather statement, Jul 21, 5:49 PM EDT, 4 minutes before
Special Weather Statement National Weather Service Morristown TN 549 PM EDT SAT JUL 21 2018 TNZ099-100-212215- Bradley TN-Hamilton TN- 549 PM EDT SAT JUL 21 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BRADLEY AND SOUTHEASTERN HAMILTON COUNTIES UNTIL 615 PM EDT... At 548 PM EDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Harrison, or 8 miles north of Ringgold, moving southeast at 20 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Chattanooga, Harrison, Collegedale, East Brainerd, Red Clay State Park, Flint Springs, Apison, Gap Springs, Ooltewah, East Ridge and Harrison Bay State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3499 8521 3514 8512 3501 8478 3499 8479 TIME...MOT...LOC 2148Z 296DEG 18KT 3503 8510 05/MA
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:02 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock | 58 min |
| Jul 20, 9:12 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne, Scott | 48 min |
| Jul 20, 9:42 PM EDT | Severe Thunderstorm Warning | MRX | Grainger, Hamblen, Hawkins | 63 min |
| Jul 20, 9:56 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Union | 49 min |
| Jul 20, 10:10 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Greene, Jefferson, Sullivan, Unicoi, Washington | 65 min |
| Jul 20, 10:17 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Blount, Knox, Sevier | 58 min |
| Jul 20, 10:31 PM EDT | Tornado Warning | MRX | Bledsoe, Rhea | 44 min |
| Jul 20, 10:44 PM EDT | Severe Thunderstorm Warning | MRX | Hamblen | 16 min |
| Jul 20, 10:48 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson, Unicoi | 57 min |
| Jul 20, 11:10 PM EDT | Tornado Warning | MRX | Bledsoe, Meigs, Rhea | 50 min |
| Jul 20, 11:13 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Sevier | 32 min |
| Jul 20, 11:18 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea | 42 min |
| Jul 20, 11:42 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Meigs, Rhea | 48 min |
| Jul 20, 11:47 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Meigs, Rhea, Roane | 3 hr |
| Jul 21, 12:02 AM EDT | Special Weather Statement | MRX | Bledsoe | 43 min |
| Jul 21, 12:11 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Rhea, Sequatchie | 49 min |
| Jul 21, 12:14 AM EDT | Special Weather Statement | MRX | Scott | 46 min |
| Jul 21, 12:24 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Meigs, Polk | 51 min |
| Jul 21, 12:55 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea | 50 min |
| Jul 21, 12:58 AM EDT | Areal Flood Advisory | MRX | McMinn, Meigs, Rhea | 3 hr |
| Jul 21, 12:58 AM EDT | Severe Thunderstorm Warning | MRX | Polk | 62 min |
| Jul 21, 1:16 AM EDT | Areal Flood Advisory | MRX | Bledsoe, Rhea | 3 hr |
| Jul 21, 1:21 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea | 39 min |
| Jul 21, 1:27 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Scott | 48 min |
| Jul 21, 1:28 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn | 47 min |
| Jul 21, 2:02 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, Polk | 28 min |
| Jul 21, 2:11 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Morgan, Roane, Scott | 52 min |
| Jul 21, 2:16 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Grainger, Knox, Union | 59 min |
| Jul 21, 2:39 AM EDT | Areal Flood Advisory | MRX | Bradley, McMinn, Polk | 3 hr |
| Jul 21, 2:54 AM EDT | Special Weather Statement | MRX | Blount, Loudon, Roane | 66 min |
| Jul 21, 3:06 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea | 39 min |
| Jul 21, 3:10 AM EDT | Special Weather Statement | MRX | Cocke, Grainger, Hamblen, Jefferson | 50 min |
| Jul 21, 3:30 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea | 45 min |
| Jul 21, 3:36 AM EDT | Areal Flood Warning | MRX | Bledsoe, Bradley, Hamilton, McMinn, Meigs, Rhea | 3 hr |
| Jul 21, 3:41 AM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion, Sequatchie | 48 min |
| Jul 21, 3:53 AM EDT | Severe Thunderstorm Warning | MRX | McMinn, Monroe | 41 min |
| Jul 21, 4:05 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Polk | 40 min |
| Jul 21, 4:33 AM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton, Marion, Polk | 117 min |
| Jul 21, 6:39 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe | 36 min |
| Jul 21, 7:05 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea | 25 min |
| Jul 21, 7:24 AM EDT | Special Weather Statement | MRX | Bradley, Polk | 36 min |
| Jul 21, 4:06 PM EDT | Special Weather Statement | MRX | Knox | 39 min |
| Jul 21, 4:17 PM EDT | Special Weather Statement | MRX | Monroe | 43 min |
| Jul 21, 4:45 PM EDT | Special Weather Statement | MRX | Hancock, Hawkins | 60 min |
| Jul 21, 4:47 PM EDT | Special Weather Statement | MRX | Sevier | 58 min |
| Jul 21, 5:12 PM EDT | Special Weather Statement | MRX | Bradley | 63 min |
| Jul 21, 5:19 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Meigs | 56 min |
| Jul 21, 5:33 PM EDT | Special Weather Statement | MRX | Monroe | 42 min |
| Jul 21, 5:44 PM EDT | Special Weather Statement | MRX | Grainger | 46 min |
| Jul 21, 5:49 PM EDT | Special Weather Statement | MRX | Bradley | 26 min |
| Jul 21, 6:07 PM EDT | Special Weather Statement | MRX | Polk | 53 min |
| Jul 21, 6:24 PM EDT | Special Weather Statement | MRX | Monroe | 51 min |
| Jul 21, 6:26 PM EDT | Severe Thunderstorm Warning | MRX | Polk | 49 min |
| Jul 21, 7:00 PM EDT | Special Weather Statement | MRX | Blount | 30 min |
| Jul 21, 7:15 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Sevier | 34 min |
| Jul 20, 8:14 PM EDT | Special Weather Statement | MRX | Scott, Wise, City of Norton | 46 min |
| Jul 20, 9:23 PM EDT | Severe Thunderstorm Warning | MRX | Lee | 37 min |
| Jul 20, 11:50 PM EDT | Areal Flood Advisory | MRX | Wise, City of Norton | 3 hr |
| Jul 21, 4:15 PM EDT | Special Weather Statement | MRX | Russell | 45 min |
| Jul 21, 4:59 PM EDT | Special Weather Statement | MRX | Scott | 61 min |
| Jul 21, 5:43 PM EDT | Special Weather Statement | MRX | Russell | 47 min |
| Jul 21, 6:34 PM EDT | Special Weather Statement | MRX | Smyth | 41 min |
| Jul 21, 6:10 PM EDT | Special Weather Statement | MRX | Cherokee | 50 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2018Every severe thunderstorm warning in 2018
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.