Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

June 14, 2021Union County, Tennessee

NWS Morristown, TN issued this special weather statement at Jun 14, 2021, 12:56 AM EDT for Union County, Tennessee. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 14, 2021, 12:56 AM EDT (04:56 UTC)
Expired: Jun 14, 2021, 1:30 AM EDT
In force: 34 min
Issued by: NWS Morristown, TN

County Union County, TN

The radar

The Knoxville radar (KMRX), 27 km from the middle of the area, began a volume at 05:00 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

Nashville Metro, TN (KBNA), launched 00:00Z, 4.9 hours before the alert went out and 261 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: 1471 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1759 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 13, 10:15 PM EDT, 2 hours 41 minutes earlier.

Area forecast discussion, Jun 13, 10:15 PM EDT, 2 hours 41 minutes before

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Hazardous weather outlook, Jun 13, 3:25 PM EDT, 9 hours 31 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
325 PM EDT Sun Jun 13 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-141930-
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-
325 PM EDT Sun Jun 13 2021 /225 PM CDT Sun Jun 13 2021/

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

.DAY ONE...This Afternoon and Tonight

A broken line of scattered showers and thunderstorms will move
into the region from the north this evening. These storms are
expected to weaken into the late evening hours, however a few
strong to severe storms are possible north of interstate 40. The
primary hazards with any of the stronger storms will be damaging
winds and large hail.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

In the hours before

Special weather statement, Jun 13, 10:26 PM EDT, 2 hours 30 minutes before

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Special weather statement, Jun 13, 10:37 PM EDT, 2 hours 19 minutes before

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Special weather statement, Jun 13, 10:59 PM EDT, 1 hour 57 minutes before

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Special weather statement, Jun 13, 11:27 PM EDT, 1 hour 29 minutes before

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Special weather statement, Jun 14, 12:22 AM EDT, 34 minutes before

Special Weather Statement
National Weather Service Morristown TN
1222 AM EDT Mon Jun 14 2021

TNZ016-017-042-044-140445-
Sullivan TN-Washington TN-Northwest Greene TN-Hawkins TN-
1222 AM EDT Mon Jun 14 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SULLIVAN...
NORTHEASTERN HAWKINS...NORTHWESTERN WASHINGTON AND NORTHEASTERN
GREENE COUNTIES UNTIL 1245 AM EDT...

At 1222 AM EDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Kingsport, moving south at 15 mph.

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

Locations impacted include...
Kingsport, Surgoinsville, Church Hill, Mount Carmel, Baileyton,
Sullivan Gardens, Fall Branch, Okolona, Jearoldstown and Bays
Mountain Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3636 8251 3634 8284 3659 8279 3660 8269
      3659 8261
TIME...MOT...LOC 0422Z 006DEG 12KT 3650 8268

JLB

Special weather statement, Jun 14, 12:56 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
1256 AM EDT Mon Jun 14 2021

TNZ037-038-069-140530-
Union TN-Grainger TN-Knox TN-
1256 AM EDT Mon Jun 14 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KNOX...SOUTHEASTERN
UNION AND SOUTHWESTERN GRAINGER COUNTIES UNTIL 130 AM EDT...

At 1256 AM EDT, Doppler radar was tracking a strong thunderstorm over
Plainview, or near Maynardville, moving south at 10 mph.

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

Locations impacted include...
Maynardville, Plainview, Blaine, Luttrell, House Mountain State Park,
Maloneyville, Mascot and Paulette.

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 3614 8364 3613 8364 3611 8363 3610 8363
      3610 8365 3612 8365 3612 8367 3609 8366
      3608 8367 3610 8369 3610 8371 3606 8370
      3605 8391 3627 8388 3627 8370
TIME...MOT...LOC 0456Z 356DEG 8KT 3620 8377

JLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 9:09 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	36 min
Jun 13, 9:39 PM EDT	Special Weather Statement	MRX	Scott	36 min
Jun 13, 10:00 PM EDT	Special Weather Statement	MRX	Hamilton	30 min
Jun 13, 10:26 PM EDT	Special Weather Statement	MRX	Marion	19 min
Jun 13, 10:37 PM EDT	Special Weather Statement	MRX	Hawkins	23 min
Jun 13, 10:59 PM EDT	Special Weather Statement	MRX	Greene	31 min
Jun 13, 11:27 PM EDT	Special Weather Statement	MRX	Greene	48 min
Jun 14, 12:22 AM EDT	Special Weather Statement	MRX	Hawkins	23 min
Jun 14, 1:09 AM EDT	Special Weather Statement	MRX	Union	36 min
Jun 14, 1:35 AM EDT	Special Weather Statement	MRX	Loudon	25 min
Jun 14, 2:09 AM EDT	Special Weather Statement	MRX	Knox	36 min
Jun 14, 2:22 AM EDT	Special Weather Statement	MRX	Hamblen	38 min
Jun 14, 2:31 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon	32 min
Jun 14, 3:02 AM EDT	Special Weather Statement	MRX	Marion	28 min
Jun 13, 9:08 PM EDT	Special Weather Statement	MRX	Russell	52 min

Nearby

Special Weather Statements in Tennessee, 2021 Every special weather statement in 2021

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.