Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 119, NWS Morristown, TN

June 28, 2018Bradley County, McMinn County, Polk County, Tennessee; Cherokee County, North Carolina

NWS Morristown, TN issued this severe thunderstorm warning at Jun 28, 2018, 9:59 AM EDT for Bradley County, McMinn County, Polk County, Tennessee; Cherokee County, North Carolina. It was in force for 61 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 28, 2018, 9:59 AM EDT (13:59 UTC)
Expired: Jun 28, 2018, 11:00 AM EDT
In force: 61 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cherokee County, NC, Bradley County, TN, McMinn County, TN, Polk County, TN

The radar

The Northeast Alabama radar (KHTX), 146 km from the middle of the area, began a volume at 14:00 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.0 hours before the alert went out and 204 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: 1102 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

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 28, 3:36 AM EDT, 6 hours 23 minutes earlier.

Area forecast discussion, Jun 28, 3:36 AM EDT, 6 hours 23 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
336 AM EDT Thu Jun 28 2018

.SHORT TERM...(Today through Friday)...
Convection lined up from western KY to east TN this morning will
bring a wet start to the day. But high pressure will begin to
build in behind the departing H5 trough, and we expect to see
convective activity diminish from north to south this afternoon
and evening. For Friday, convection will be diurnally-driven and
mainly confined to higher elevations of the mountains and Plateau.
Temperatures will be well above normal Fri-Sun.

.LONG TERM (Friday Night through Wednesday)...
The upper level ridge axis will be just to the west to start the
long-term period. The ridge axis will move over the area Friday
night into Saturday morning. With this, there will be some weak
moisture return by Saturday afternoon. The best moisture on
Saturday will be across the southern half of the forecast area and
have around 20-30% chances for afternoon showers and storms with
dry conditions further to the north. Saturday will be the hottest
day of the long-term forecast with highs in the upper 80s to low
90s for most locations.

The ridge begins to break down late Saturday night into Sunday as an
upper level trough moves into the Upper Mississippi River Valley and
eventually the Great Lakes region by Sunday. At the surface, there
will be a front associated with the upper level trough. Moisture
will continue to increase across the area with southwesterly flow
throughout much of the atmosphere. Afternoon showers and storms will
be more widespread on Sunday and Monday. The front to the north will
slow and stall early next week as the trough races off to the
northeast and the ridge tries to become established. For now, it
looks as though the front will stall to the north across Ohio River
Valley keeping highs in the upper 80s to low 90s for most locations.
Also, expect numerous to widespread diurnally driven showers and
storms each afternoon next week. Overall, expect this to continue
into Wednesday on the 4th of July.
&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             88  71  91  73 /  60  20  20  20
Knoxville McGhee Tyson Airport, TN  86  69  91  72 /  60  10  10   0
Oak Ridge, TN                       86  70  92  72 /  60  10  10   0
Tri Cities Airport, TN              85  65  90  67 /  40  10  10   0

&&

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

&&

GC/MA

Hazardous weather outlook, Jun 28, 3:39 AM EDT, 6 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
339 AM EDT Thu Jun 28 2018

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-290745-
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-
339 AM EDT Thu Jun 28 2018 /239 AM CDT Thu Jun 28 2018/

This Hazardous Weather Outlook is for portions of Southwest North
Carolina...East Tennessee and Southwest Virginia.

.DAY ONE...Today and Tonight

Additional showers and thunderstorms are expected once again
across the region. A few of these storms may become strong or
severe, producing damaging winds, hail and heavy rainfall with
localized flash flooding possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today and tonight.

In the hours before

Special weather statement, Jun 28, 9:02 AM EDT, 57 minutes before

Special Weather Statement
National Weather Service Morristown TN
902 AM EDT THU JUN 28 2018

TNZ083>085-281345-
Rhea TN-Meigs TN-McMinn TN-
902 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL RHEA...CENTRAL MEIGS AND
CENTRAL MCMINN COUNTIES UNTIL 945 AM EDT...

At 901 AM EDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Dayton, moving southeast at 25 mph.

Winds in excess of 45 mph will be possible with this storm.

Locations impacted include...
Athens, Dayton, Decatur, Englewood, Niota, Calhoun, Riceville,
Evensville, Hillsview, Clear Water and Old Washington.

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 3529 8473 3529 8474 3556 8511 3571 8496
      3546 8447 3527 8464 3527 8467 3525 8469
TIME...MOT...LOC 1301Z 306DEG 22KT 3559 8497

DH

Special weather statement, Jun 28, 9:23 AM EDT, 36 minutes before

Special Weather Statement
National Weather Service Morristown TN
923 AM EDT THU JUN 28 2018

TNZ082>084-099-281430-
Rhea TN-Bledsoe TN-Hamilton TN-Meigs TN-
923 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN RHEA...BLEDSOE...
WEST CENTRAL MEIGS AND NORTHEASTERN HAMILTON COUNTIES UNTIL 1030 AM
EDT/930 AM CDT/...

At 923 AM EDT/823 AM CDT/, Doppler radar was tracking a strong
thunderstorm 8 miles southeast of Spencer, moving southeast at 20
mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Dayton, Pikeville, Soddy-Daisy, Graysville, Sale Creek, Palio, Fall
Creek Falls State Park, Brayton, Mount Crest, Old Cumberland and Flat
Top Mountain.

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 3554 8544 3557 8542 3570 8528 3547 8489
      3526 8510
TIME...MOT...LOC 1323Z 310DEG 18KT 3564 8538

DH

Local storm report, Jun 28, 9:25 AM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
925 AM EDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0854 AM     TSTM WND DMG     6 N DECATUR             35.61N 84.79W
06/28/2018                   RHEA               TN   911 CALL CENTER

            MULTIPLE TREES DOWN.

&&

PWARREN

Local storm report, Jun 28, 9:46 AM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
946 AM EDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 AM     FLASH FLOOD      KINGSTON                35.87N 84.51W
06/28/2018                   ROANE              TN   911 CALL CENTER

            ROAD FLOODED ALONG DECATER HIGHWAY SOUTH OF KINGSTON.

&&

PWARREN

Special weather statement, Jun 28, 9:52 AM EDT, 7 minutes before

Special Weather Statement
National Weather Service Morristown TN
952 AM EDT THU JUN 28 2018

NCZ060-TNZ085-101-102-281445-
Cherokee NC-West Polk TN-East Polk TN-McMinn TN-
952 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CHEROKEE...POLK AND
SOUTHEASTERN MCMINN COUNTIES UNTIL 1045 AM EDT...

At 951 AM EDT, Doppler radar was tracking a strong thunderstorm near
Etowah, or 9 miles northeast of Benton, moving southeast at 15 mph.

Winds in excess of 45 mph will be possible with this storm.

Locations impacted include...
Benton, Ducktown, Etowah, William L. Davenport Refuge, Turtletown,
Reliance, Copperhill, Archville, Hiwassee Ocoee State Park, Dentville
and Big Frog Mountain.

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 3519 8470 3523 8470 3523 8471 3525 8471
      3525 8470 3526 8471 3526 8474 3527 8473
      3538 8454 3532 8445 3528 8449 3524 8436
      3520 8435 3522 8432 3521 8431 3511 8416
      3499 8433 3499 8452
TIME...MOT...LOC 1351Z 321DEG 14KT 3529 8455

DH

Local storm report, Jun 28, 9:57 AM EDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MORRISTOWN TN
957 AM EDT THU JUN 28 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0854 AM     TSTM WND DMG     4 NE DECATUR            35.57N 84.74W
06/28/2018                   MEIGS              TN   911 CALL CENTER

            MULTIPLE TREES DOWN.

&&

PWARREN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 8:12 PM EDT	Flash Flood Warning	MRX	McMinn, Meigs, Rhea	2 hr
Jun 27, 8:15 PM EDT	Special Weather Statement	MRX	Hamilton	45 min
Jun 27, 8:24 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Meigs	51 min
Jun 28, 3:51 AM EDT	Special Weather Statement	MRX	Blount	39 min
Jun 28, 4:43 AM EDT	Special Weather Statement	MRX	Knox	47 min
Jun 28, 4:55 AM EDT	Special Weather Statement	MRX	Morgan	50 min
Jun 28, 5:02 AM EDT	Areal Flood Advisory	MRX	Morgan	3 hr
Jun 28, 5:30 AM EDT	Special Weather Statement	MRX	Rhea	45 min
Jun 28, 5:39 AM EDT	Areal Flood Advisory	MRX	Blount, Knox, Sevier	3 hr
Jun 28, 5:43 AM EDT	Special Weather Statement	MRX	Blount, Grainger, Jefferson, Sevier	47 min
Jun 28, 5:46 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Morgan, Roane, Scott	44 min
Jun 28, 6:15 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Sevier	45 min
Jun 28, 6:17 AM EDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea	28 min
Jun 28, 6:28 AM EDT	Flash Flood Warning	MRX	Morgan	6 hr
Jun 28, 6:33 AM EDT	Special Weather Statement	MRX	Loudon, Roane	42 min
Jun 28, 6:52 AM EDT	Areal Flood Advisory	MRX	Bledsoe, Meigs, Rhea	3 hr
Jun 28, 6:54 AM EDT	Special Weather Statement	MRX	Monroe	36 min
Jun 28, 7:05 AM EDT	Areal Flood Advisory	MRX	Blount, Sevier	3 hr
Jun 28, 7:06 AM EDT	Areal Flood Advisory	MRX	Loudon, Roane	3 hr
Jun 28, 7:10 AM EDT	Special Weather Statement	MRX	Bledsoe	35 min
Jun 28, 7:48 AM EDT	Special Weather Statement	MRX	Bledsoe, Meigs, Rhea	42 min
Jun 28, 8:06 AM EDT	Special Weather Statement	MRX	Loudon, McMinn, Meigs, Monroe, Polk	54 min
Jun 28, 8:41 AM EDT	Flash Flood Warning	MRX	Loudon, Roane	3 hr
Jun 28, 8:51 AM EDT	Severe Thunderstorm Warning	MRX	McMinn, Meigs, Monroe, Polk	54 min
Jun 28, 9:02 AM EDT	Special Weather Statement	MRX	McMinn, Meigs, Rhea	43 min
Jun 28, 9:08 AM EDT	Areal Flood Advisory	MRX	McMinn, Monroe, Polk	3 hr
Jun 28, 9:20 AM EDT	Areal Flood Advisory	MRX	Bledsoe, Meigs, Rhea	3 hr
Jun 28, 9:23 AM EDT	Special Weather Statement	MRX	Bledsoe	67 min
Jun 28, 9:33 AM EDT	Flash Flood Warning	MRX	Blount, Sevier	117 min
Jun 28, 9:42 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea	63 min
Jun 28, 9:52 AM EDT	Special Weather Statement	MRX	Polk	53 min
Jun 28, 10:07 AM EDT	Flash Flood Warning	MRX	Bledsoe, Rhea	113 min
Jun 28, 10:15 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, Marion, Sequatchie	60 min
Jun 28, 10:27 AM EDT	Flash Flood Warning	MRX	McMinn, Meigs, Monroe, Polk	3 hr
Jun 28, 10:45 AM EDT	Special Weather Statement	MRX	Bradley	15 min
Jun 28, 10:49 AM EDT	Areal Flood Advisory	MRX	Bradley, Hamilton, Polk, Sequatchie	3 hr
Jun 28, 11:14 AM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Marion, Sequatchie	61 min
Jun 28, 11:59 AM EDT	Areal Flood Advisory	MRX	Hamilton, Marion, Sequatchie	3 hr
Jun 28, 12:09 PM EDT	Severe Thunderstorm Warning	MRX	Marion	36 min
Jun 28, 12:57 PM EDT	Severe Thunderstorm Warning	MRX	Marion	33 min
Jun 28, 1:39 PM EDT	Flash Flood Warning	MRX	Marion	90 min
Jun 28, 7:02 AM EDT	Special Weather Statement	MRX	Swain	28 min
Jun 28, 10:56 AM EDT	Special Weather Statement	MRX	Cherokee	64 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2018 Severe Thunderstorm Warnings in North Carolina, 2018 Every 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.