Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

July 26, 2021Anderson County, Knox County, Tennessee

NWS Morristown, TN issued this special weather statement at Jul 26, 2021, 2:47 PM EDT for Anderson County, Knox County, Tennessee. It was in force for 43 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: Jul 26, 2021, 2:47 PM EDT (18:47 UTC)
Expired: Jul 26, 2021, 3:30 PM EDT
In force: 43 min
Issued by: NWS Morristown, TN

Counties Anderson County, TN, Knox County, TN

The radar

The Knoxville radar (KMRX), 69 km from the middle of the area, began a volume at 18:46 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, 6.8 hours before the alert went out and 220 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: 1186 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 26, 1:54 PM EDT, 53 minutes earlier.

Area forecast discussion, Jul 26, 1:54 PM EDT, 53 minutes before

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Hazardous weather outlook, Jul 26, 3:55 AM EDT, 10 hours 52 minutes before

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In the hours before

Special weather statement, Jul 26, 1:14 PM EDT, 1 hour 33 minutes before

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Special weather statement, Jul 26, 1:26 PM EDT, 1 hour 21 minutes before

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Special weather statement, Jul 26, 2:05 PM EDT, 42 minutes before

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Special weather statement, Jul 26, 2:10 PM EDT, 37 minutes before

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Special weather statement, Jul 26, 2:45 PM EDT, 2 minutes before

Special Weather Statement
National Weather Service Morristown TN
245 PM EDT Mon Jul 26 2021

TNZ070-073-261930-
Jefferson TN-North Sevier TN-
245 PM EDT Mon Jul 26 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL JEFFERSON AND
NORTHWESTERN SEVIER COUNTIES UNTIL 330 PM EDT...

At 244 PM EDT, Doppler radar was tracking a strong thunderstorm over
Sevierville, moving east at 15 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Sevierville, Gatlinburg, Pigeon Forge, McMahan, Harrisburg,
Fairgarden and Kodak.

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 3590 8370 3599 8365 3597 8337 3575 8346
      3573 8351 3574 8352
TIME...MOT...LOC 1844Z 289DEG 15KT 3591 8361

Garuckas

Special weather statement, Jul 26, 2:47 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
247 PM EDT Mon Jul 26 2021

TNZ036-037-069-261930-
Anderson TN-Union TN-Knox TN-
247 PM EDT Mon Jul 26 2021

...SIGNIFICANT WEATHER ADVISORY FOR KNOX...ANDERSON AND SOUTHWESTERN
UNION COUNTIES UNTIL 330 PM EDT...

At 247 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Maynardville to near Oliver Springs.
Movement was southeast at 20 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Knoxville, Oak Ridge, Clinton, Farragut, Oliver Springs, Louisville,
Plainview, Halls, Rocky Top and Norris.

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 3594 8430 3609 8438 3615 8445 3619 8440
      3622 8429 3618 8424 3623 8423 3624 8420
      3623 8407 3628 8404 3627 8400 3630 8397
      3606 8369 3588 8403 3584 8407 3585 8409
      3583 8412 3585 8414 3579 8415
TIME...MOT...LOC 1847Z 309DEG 19KT 3623 8391 3608 8433

Garuckas

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 8:08 PM EDT	Areal Flood Advisory	MRX	Sequatchie	52 min
Jul 26, 1:14 PM EDT	Special Weather Statement	MRX	Claiborne, Hancock, Hawkins	46 min
Jul 26, 1:26 PM EDT	Special Weather Statement	MRX	Campbell	49 min
Jul 26, 1:40 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne, Union	50 min
Jul 26, 2:05 PM EDT	Special Weather Statement	MRX	Anderson, Campbell	40 min
Jul 26, 2:10 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen	50 min
Jul 26, 2:45 PM EDT	Special Weather Statement	MRX	Sevier	45 min
Jul 26, 3:07 PM EDT	Special Weather Statement	MRX	Cocke	38 min
Jul 26, 3:45 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	45 min
Jul 26, 3:54 PM EDT	Special Weather Statement	MRX	Rhea	51 min
Jul 26, 4:07 PM EDT	Special Weather Statement	MRX	Scott	38 min
Jul 26, 4:25 PM EDT	Special Weather Statement	MRX	Marion	50 min
Jul 26, 4:27 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	48 min
Jul 26, 4:37 PM EDT	Flash Flood Warning	MRX	Bledsoe, Bradley, Hamilton, McMinn, Meigs, Rhea	68 min
Jul 26, 4:57 PM EDT	Special Weather Statement	MRX	McMinn	48 min
Jul 26, 5:38 PM EDT	Special Weather Statement	MRX	Hamilton	52 min
Jul 26, 5:45 PM EDT	Special Weather Statement	MRX	Polk	45 min
Jul 26, 6:24 PM EDT	Special Weather Statement	MRX	Rhea	51 min
Jul 26, 7:29 PM EDT	Special Weather Statement	MRX	Sequatchie	31 min
Jul 26, 4:20 PM EDT	Special Weather Statement	MRX	Russell	40 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.