Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 41, NWS Morristown, TN

June 19, 2019Morgan County, Scott County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 19, 2019, 11:19 PM EDT for Morgan County, Scott County, Tennessee. It was in force for 41 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: Jun 19, 2019, 11:19 PM EDT (03:19 UTC)
Expired: Jun 20, 2019, 12:00 AM EDT
In force: 41 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Morgan County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 106 km from the middle of the area, began a volume at 03:18 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 00:00Z, 3.3 hours before the alert went out and 182 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 406 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.5

Open this sounding in Storm Lab

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 Jun 19, 9:56 PM EDT, 1 hour 23 minutes earlier.

Area forecast discussion, Jun 19, 9:56 PM EDT, 1 hour 23 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
956 PM EDT Wed Jun 19 2019

.DISCUSSION...Previous forecast still mostly on track. Line of
showers and strong to severe storms currently moving through
central KY and middle TN is associated with the shortwave trough
moving in. Latest thinking is that the line of storms will still
be fairly strong by the time it reaches our plateau counties,
roughly 03Z for the northern plateau and 04z for the central
plateau. The strength of line the line depends on if the cold
pool races out ahead of the line or not. Most recent radar data
indicates that it may already be happening. There has also been a
decrease in lightning activity over the past hour which further
supports the weakening of the storms. A warning or two is still
possible by the time the line reaches our area but expect the
weakening trend to slowly continue as these storms draw near as
surface based instability continues to decrease as we get further
into the evening hours.

Made adjustments to hourly POPs, WX, SKY, and QPF to try to
account for incoming showers and storms. New zones already sent.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             72  84  70  90 /  60  70  20  20
Knoxville McGhee Tyson Airport, TN  71  81  67  86 /  60  70  40  10
Oak Ridge, TN                       71  81  67  87 /  60  70  30  10
Tri Cities Airport, TN              67  78  63  82 /  50  60  50  10

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...None.
TN...None.
VA...None.
&&

SR

Hazardous weather outlook, Jun 19, 6:56 PM EDT, 4 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
656 PM EDT Wed Jun 19 2019

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-202300-
Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-
Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Cocke Smoky Mountains-Northwest Greene-Southeast Greene-
Washington-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-Russell-
656 PM EDT Wed Jun 19 2019 /556 PM CDT Wed Jun 19 2019/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...Tonight

A line of showers and strong to severe storms may move out of
Middle TN and into portions of our area later this evening,
mainly west of I-75 and north of I-40. If the storms maintain
their strength, some of them could produce large hail and isolated
wind damage. Another round of showers and storms could move
through closer to sunrise but aren't expected to be as strong.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

...Strong to Possibly Severe Storms Thursday Afternoon...
...Another Round of Strong to Severe Storms Possible late Friday
Night and Saturday....

A frontal boundary will move across the area Thursday producing
showers and thunderstorms. Some of the storms could be strong to
severe in the afternoon. The main concern will be hail up to
quarter size, strong and gusty winds, and locally heavy rainfall.

For Friday night, an area of storms is expected to develop across
the Indiana and northern Kentucky state line and then move
southeast into the area Saturday morning. Some of these storms
could be strong to severe producing damaging winds, hail up to
quarter size, and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required this evening and possibly
Saturday. Reports of flash flooding, storm damage, or heavy
rainfall amounts will be appreciated this week.

In the hours before

Special weather statement, Jun 19, 6:21 PM EDT, 4 hours 58 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jun 19, 6:56 PM EDT, 4 hours 23 minutes before

Special Weather Statement
National Weather Service Morristown TN
656 PM EDT Wed Jun 19 2019

TNZ037-038-069-070-192345-
Jefferson TN-Union TN-Grainger TN-Knox TN-
656 PM EDT Wed Jun 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KNOX...NORTHWESTERN
JEFFERSON...SOUTHWESTERN GRAINGER AND SOUTHERN UNION COUNTIES UNTIL
745 PM EDT...

At 655 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Plainview, or 9 miles north of Knoxville, moving
northeast at 20 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Knoxville, Jefferson City, Maynardville, Plainview, New Market,
Strawberry Plains, Halls, Blaine, Luttrell, Paulette, Rose Hill,
Sharps Chapel, House Mountain State Park, Maloneyville, Mascot,
Bearden, Powell and Big Ridge 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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM EDT for
east Tennessee.

LAT...LON 3611 8345 3605 8364 3604 8365 3604 8367
      3603 8368 3591 8398 3601 8409 3604 8406
      3607 8409 3617 8397 3619 8394 3620 8396
      3636 8380
TIME...MOT...LOC 2255Z 232DEG 17KT 3611 8390

mjb

Special weather statement, Jun 19, 7:21 PM EDT, 3 hours 58 minutes before

Special Weather Statement
National Weather Service Morristown TN
721 PM EDT Wed Jun 19 2019

TNZ038-039-070-200000-
Jefferson TN-Hamblen TN-Grainger TN-
721 PM EDT Wed Jun 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN JEFFERSON...CENTRAL
GRAINGER AND HAMBLEN COUNTIES UNTIL 800 PM EDT...

At 720 PM EDT, Doppler radar was tracking a strong thunderstorm over
Jefferson City, moving northeast at 25 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Morristown, Jefferson City, Rutledge, Bean Station, White Pine, New
Market, Strawberry Plains, Blaine, Panther Creek State Park, Alpha,
Buffalo Springs and Lowland.

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.

&&

LAT...LON 3615 8318 3613 8318 3613 8319 3615 8322
      3613 8322 3613 8324 3610 8324 3603 8364
      3604 8365 3604 8367 3606 8369 3610 8371
      3610 8369 3609 8367 3614 8372 3616 8373
      3638 8337
TIME...MOT...LOC 2320Z 239DEG 21KT 3614 8353

mjb

Special weather statement, Jun 19, 10:35 PM EDT, 44 minutes before

Special Weather Statement
National Weather Service Morristown TN
1035 PM EDT Wed Jun 19 2019

TNZ012-200330-
Scott TN-
1035 PM EDT Wed Jun 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR SCOTT COUNTY UNTIL 1130 PM EDT...

At 1035 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Mount Pisgah to Jamestown. Movement was
east at 35 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Oneida, Huntsville, Helenwood, Winfield, Ketchen, Honey Creek State
Park and Big South Fork National Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM EDT for
east Tennessee.

LAT...LON 3659 8426 3657 8426 3656 8425 3651 8426
      3651 8433 3647 8434 3646 8435 3642 8435
      3639 8431 3639 8433 3634 8433 3638 8469
      3640 8466 3641 8466 3644 8469 3650 8471
      3660 8478
TIME...MOT...LOC 0235Z 275DEG 30KT 3662 8480 3645 8495

mjb

Special weather statement, Jun 19, 11:02 PM EDT, 17 minutes before

Special Weather Statement
National Weather Service Morristown TN
1002 PM CDT Wed Jun 19 2019

TNZ082-200400-
Bledsoe TN-
1002 PM CDT Wed Jun 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BLEDSOE COUNTY UNTIL
1100 PM CDT...

At 1002 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles southeast of Sparta to 6 miles south
of Spencer. Movement was east at 35 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Pikeville, Melvine, Fall Creek Falls State Park and Mount Crest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3572 8526 3576 8526 3577 8510 3576 8507
      3577 8504 3575 8503 3577 8494 3576 8492
      3568 8499 3562 8505 3557 8511 3553 8510
      3561 8537
TIME...MOT...LOC 0302Z 277DEG 29KT 3584 8527 3565 8546

mjb

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 10:35 PM EDT	Special Weather Statement	MRX	Scott	55 min
Jun 19, 11:02 PM EDT	Special Weather Statement	MRX	Bledsoe	58 min
Jun 19, 11:30 PM EDT	Special Weather Statement	MRX	Sequatchie	45 min
Jun 19, 11:36 PM EDT	Special Weather Statement	MRX	Meigs, Rhea, Roane	39 min
Jun 19, 11:51 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Loudon, Roane	24 min
Jun 19, 11:54 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	66 min
Jun 20, 12:13 AM EDT	Special Weather Statement	MRX	Loudon	47 min
Jun 20, 12:34 AM EDT	Special Weather Statement	MRX	Anderson, Claiborne, Grainger, Hancock, Union	56 min
Jun 20, 12:42 AM EDT	Special Weather Statement	MRX	Monroe	48 min
Jun 20, 12:54 AM EDT	Special Weather Statement	MRX	Blount, Jefferson, Knox, Sevier	51 min
Jun 20, 1:12 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Hancock, Hawkins, Jefferson	48 min
Jun 20, 1:47 AM EDT	Special Weather Statement	MRX	Hawkins, Sullivan, Washington	43 min
Jun 20, 1:50 AM EDT	Special Weather Statement	MRX	Cocke, Greene, Hamblen	40 min
Jun 20, 5:05 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	55 min
Jun 20, 5:07 AM EDT	Areal Flood Advisory	MRX	Scott	3 hr
Jun 20, 5:57 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, Marion, Meigs, Rhea and 1 more	63 min
Jun 20, 6:31 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Loudon, McMinn, Meigs, Monroe, Polk and 2 more	59 min
Jun 20, 6:47 AM EDT	Special Weather Statement	MRX	Greene, Hamblen	58 min
Jun 20, 7:07 AM EDT	Areal Flood Advisory	MRX	Grainger, Hamblen, Jefferson, Knox, Union	113 min
Jun 20, 7:16 AM EDT	Special Weather Statement	MRX	Blount, Jefferson, Knox, Loudon, Sevier	44 min
Jun 20, 7:26 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Jefferson, Knox, Monroe, Sevier	64 min
Jun 20, 8:00 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Union	45 min
Jun 20, 8:02 AM EDT	Special Weather Statement	MRX	Carter, Johnson, Sullivan, Washington	58 min
Jun 20, 8:38 AM EDT	Special Weather Statement	MRX	Greene, Hancock, Hawkins, Sullivan, Washington	67 min
Jun 20, 4:15 PM EDT	Special Weather Statement	MRX	Anderson	45 min
Jun 20, 4:59 PM EDT	Special Weather Statement	MRX	Knox	46 min
Jun 20, 5:02 PM EDT	Special Weather Statement	MRX	Hancock	43 min
Jun 20, 5:14 PM EDT	Tornado Warning	MRX	Hancock, Hawkins	31 min
Jun 20, 5:19 PM EDT	Tornado Warning	MRX	Knox	26 min
Jun 20, 5:24 PM EDT	Special Weather Statement	MRX	Blount, Loudon	51 min
Jun 20, 5:28 PM EDT	Special Weather Statement	MRX	Washington	47 min
Jun 20, 5:34 PM EDT	Tornado Warning	MRX	Greene, Hawkins	16 min
Jun 20, 5:41 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Unicoi, Washington	49 min
Jun 20, 5:44 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Knox, Sevier	46 min
Jun 20, 6:14 PM EDT	Special Weather Statement	MRX	Blount	31 min
Jun 20, 6:25 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	65 min
Jun 20, 6:29 PM EDT	Special Weather Statement	MRX	Cocke	46 min
Jun 20, 7:14 PM EDT	Special Weather Statement	MRX	McMinn, Meigs	61 min
Jun 20, 7:21 PM EDT	Special Weather Statement	MRX	Washington	39 min
Jun 20, 7:29 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	46 min
Jun 20, 7:56 PM EDT	Special Weather Statement	MRX	Polk	64 min
Jun 20, 12:52 AM EDT	Special Weather Statement	MRX	Lee, Scott	38 min
Jun 20, 1:40 AM EDT	Special Weather Statement	MRX	Scott, Wise, City of Norton	65 min
Jun 20, 9:20 AM EDT	Special Weather Statement	MRX	Russell, Washington, City of Bristol	55 min
Jun 20, 1:43 AM EDT	Special Weather Statement	MRX	Cherokee, Clay	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.