Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

July 9, 2021Polk County, Tennessee

NWS Morristown, TN issued this special weather statement at Jul 9, 2021, 12:35 PM EDT for Polk County, Tennessee. It was in force for 40 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 9, 2021, 12:35 PM EDT (16:35 UTC)
Expired: Jul 9, 2021, 1:15 PM EDT
In force: 40 min
Issued by: NWS Morristown, TN

County Polk County, TN

The radar

The Northeast Alabama radar (KHTX), 151 km from the middle of the area, began a volume at 16:36 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, 4.6 hours before the alert went out and 186 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: 785 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 22 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 9, 10:13 AM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, Jul 9, 10:13 AM EDT, 2 hours 22 minutes before

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Hazardous weather outlook, Jul 9, 3:27 AM EDT, 9 hours 8 minutes before

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In the hours before

Special weather statement, Jul 9, 9:30 AM EDT, 3 hours 5 minutes before

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Special weather statement, Jul 9, 10:00 AM EDT, 2 hours 35 minutes before

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Special weather statement, Jul 9, 10:54 AM EDT, 1 hour 41 minutes before

Special Weather Statement
National Weather Service Morristown TN
1054 AM EDT Fri Jul 9 2021

TNZ081-098-099-091545-
Sequatchie TN-Marion TN-Hamilton TN-
1054 AM EDT Fri Jul 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SEQUATCHIE...MARION AND
HAMILTON COUNTIES UNTIL 1145 AM EDT/1045 AM CDT/...

At 1054 AM EDT/954 AM CDT/, Doppler radar was tracking a strong
thunderstorm near Whitwell, or 7 miles southwest of Dunlap, moving
east southeast at 35 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Chattanooga, Dunlap, Jasper, Soddy-Daisy, Signal Mountain, South
Pittsburg, Walden, Lakesite, Whitwell and Kimball.

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 3498 8560 3502 8575 3531 8560 3532 8556
      3538 8550 3535 8497 3522 8498 3514 8503
      3507 8500 3499 8500
TIME...MOT...LOC 1454Z 276DEG 33KT 3529 8548

Special weather statement, Jul 9, 11:25 AM EDT, 1 hour 10 minutes before

Special Weather Statement
National Weather Service Morristown TN
1125 AM EDT Fri Jul 9 2021

TNZ099>101-091600-
West Polk TN-Bradley TN-Hamilton TN-
1125 AM EDT Fri Jul 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR BRADLEY...WESTERN POLK AND
SOUTHEASTERN HAMILTON COUNTIES UNTIL NOON EDT...

At 1124 AM EDT, Doppler radar was tracking a strong thunderstorm near
South Cleveland, or 10 miles southwest of Cleveland, moving east at
30 mph.

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

Locations impacted include...
Cleveland, Benton, Charleston, South Cleveland, East Cleveland,
Wildwood Lake, Collegedale, Calhoun, Waterville and Conasauga.

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 3499 8508 3534 8499 3534 8497 3531 8497
      3529 8495 3530 8494 3529 8492 3532 8489
      3529 8475 3529 8473 3527 8475 3525 8473
      3526 8471 3524 8470 3527 8467 3527 8464
      3524 8458 3499 8463
TIME...MOT...LOC 1524Z 285DEG 28KT 3505 8497

BW

Special weather statement, Jul 9, 11:56 AM EDT, 39 minutes before

Special Weather Statement
National Weather Service Morristown TN
1156 AM EDT Fri Jul 9 2021

TNZ084-085-099>102-091630-
West Polk TN-East Polk TN-Bradley TN-Hamilton TN-Meigs TN-McMinn TN-
1156 AM EDT Fri Jul 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR BRADLEY...SOUTHWESTERN MEIGS...
WESTERN POLK...SOUTHWESTERN MCMINN AND NORTHEASTERN HAMILTON COUNTIES
UNTIL 1230 PM EDT...

At 1156 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles northwest of Cleveland to 8 miles
southeast of Wildwood Lake to near Eton. Movement was east at 25 mph.

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

Locations impacted include...
Cleveland, Benton, Charleston, East Cleveland, Wildwood Lake, South
Cleveland, Calhoun, Conasauga, Big Frog Mountain and Parksville.

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 3499 8482 3503 8479 3537 8511 3535 8471
      3502 8443 3499 8444
TIME...MOT...LOC 1556Z 276DEG 21KT 3531 8499 3503 8472 3486 8484

BW

Special weather statement, Jul 9, 12:35 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
1235 PM EDT Fri Jul 9 2021

NCZ060-TNZ101-102-091715-
Cherokee NC-West Polk TN-East Polk TN-
1235 PM EDT Fri Jul 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHEROKEE AND
SOUTHEASTERN POLK COUNTIES UNTIL 115 PM EDT...

At 1235 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Ducktown, moving east at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Ducktown, William L. Davenport Refuge, Big Frog Mountain, Hot House,
Copperhill, Archville and Culberson.

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 3499 8463 3514 8456 3511 8415 3499 8417
TIME...MOT...LOC 1635Z 284DEG 27KT 3504 8452

Diegan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 9:30 AM EDT	Special Weather Statement	MRX	Blount, McMinn, Monroe	45 min
Jul 9, 9:51 AM EDT	Areal Flood Advisory	MRX	Bledsoe	114 min
Jul 9, 9:54 AM EDT	Areal Flood Advisory	MRX	Loudon, Monroe	2 hr
Jul 9, 10:00 AM EDT	Special Weather Statement	MRX	Bradley	45 min
Jul 9, 10:54 AM EDT	Special Weather Statement	MRX	Hamilton, Marion, Sequatchie	51 min
Jul 9, 11:25 AM EDT	Special Weather Statement	MRX	Bradley	35 min
Jul 9, 11:31 AM EDT	Areal Flood Advisory	MRX	Hamilton, Marion	119 min
Jul 9, 11:56 AM EDT	Special Weather Statement	MRX	Bradley, Polk	34 min
Jul 9, 12:24 PM EDT	Areal Flood Advisory	MRX	Bradley, Polk	3 hr
Jul 9, 2:41 PM EDT	Special Weather Statement	MRX	Washington	49 min
Jul 9, 3:25 PM EDT	Areal Flood Advisory	MRX	Bledsoe	2 hr
Jul 9, 3:46 PM EDT	Special Weather Statement	MRX	Knox	29 min
Jul 9, 4:12 PM EDT	Flash Flood Warning	MRX	Knox	111 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.