Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

August 30, 2021Campbell County, Tennessee

NWS Morristown, TN issued this special weather statement at Aug 30, 2021, 1:46 PM EDT for Campbell County, Tennessee. It was in force for 29 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: Aug 30, 2021, 1:46 PM EDT (17:46 UTC)
Expired: Aug 30, 2021, 2:15 PM EDT
In force: 29 min
Issued by: NWS Morristown, TN
Hail: 0.25 in
Wind: 40

County Campbell County, TN

The radar

The Knoxville radar (KMRX), 78 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 227 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: 437 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1082 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 17 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 Aug 30, 10:14 AM EDT, 3 hours 32 minutes earlier.

Area forecast discussion, Aug 30, 10:14 AM EDT, 3 hours 32 minutes before

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Hazardous weather outlook, Aug 30, 6:51 AM EDT, 6 hours 55 minutes before

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In the hours before

Special weather statement, Aug 30, 12:15 PM EDT, 1 hour 31 minutes before

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Special weather statement, Aug 30, 1:46 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
146 PM EDT Mon Aug 30 2021

TNZ013-301815-
Campbell TN-
146 PM EDT Mon Aug 30 2021

...A strong thunderstorm will impact portions of north central
Campbell County through 215 PM EDT...

At 146 PM EDT, Doppler radar was tracking a strong thunderstorm over
Red Ash, or 10 miles south of Williamsburg. This storm was nearly
stationary.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Jellico and Indian Mountain State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3659 8405 3652 8405 3653 8423 3659 8423
TIME...MOT...LOC 1746Z 259DEG 4KT 3659 8415

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

BW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 3:35 AM EDT	Flash Flood Watch	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	48 hr
Aug 30, 1:22 PM EDT	Areal Flood Advisory	MRX	Campbell	113 min
Aug 30, 2:13 PM EDT	Areal Flood Advisory	MRX	Campbell	2 hr
Aug 30, 3:25 PM EDT	Wind Advisory	MRX	Blount, Carter, Cocke, Greene, Monroe, Sevier and 1 more	34 hr
Aug 30, 4:39 PM EDT	Areal Flood Advisory	MRX	Campbell, Scott	2 hr
Aug 30, 5:18 PM EDT	Special Weather Statement	MRX	Bradley, Hamilton, Polk	57 min
Aug 30, 5:24 PM EDT	Areal Flood Advisory	MRX	Bradley, Hamilton, Meigs, Polk	2 hr
Aug 30, 6:00 PM EDT	Special Weather Statement	MRX	McMinn, Meigs, Monroe, Rhea	45 min
Aug 30, 6:06 PM EDT	Areal Flood Advisory	MRX	Bradley, McMinn, Meigs, Monroe, Polk, Rhea	114 min
Aug 30, 6:20 PM EDT	Flash Flood Warning	MRX	Bradley	115 min
Aug 30, 6:52 PM EDT	Areal Flood Advisory	MRX	Monroe	113 min
Aug 30, 6:57 PM EDT	Special Weather Statement	MRX	Bledsoe, Blount, Loudon, McMinn, Meigs, Monroe and 2 more	63 min
Aug 30, 7:00 PM EDT	Areal Flood Advisory	MRX	Anderson, Blount, Knox, Loudon, Meigs, Monroe and 3 more	2 hr
Aug 30, 7:47 PM EDT	Special Weather Statement	MRX	Blount, Knox, Sevier	58 min
Aug 30, 12:15 PM EDT	Special Weather Statement	MRX	Russell	30 min
Aug 30, 12:40 PM EDT	Areal Flood Advisory	MRX	Russell	2 hr
Aug 30, 1:10 PM EDT	Areal Flood Advisory	MRX	Russell, Washington	2 hr
Aug 30, 1:21 PM EDT	Flash Flood Warning	MRX	Russell, Washington	3 hr
Aug 30, 2:56 PM EDT	Areal Flood Advisory	MRX	Wise	2 hr
Aug 30, 6:28 PM EDT	Special Weather Statement	MRX	Cherokee	62 min
Aug 30, 7:32 PM EDT	Special Weather Statement	MRX	Clay	58 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.