Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

August 14, 2021Scott County, Tennessee

NWS Morristown, TN issued this special weather statement at Aug 14, 2021, 2:44 PM EDT for Scott County, Tennessee. It was in force for 46 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 14, 2021, 2:44 PM EDT (18:44 UTC)
Expired: Aug 14, 2021, 3:30 PM EDT
In force: 46 min
Issued by: NWS Morristown, TN
Hail: 0.50 in
Wind: 40

County Scott County, TN

The radar

The Knoxville radar (KMRX), 95 km from the middle of the area, began a volume at 18:47 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, 6.7 hours before the alert went out and 200 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: 250 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 966 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 29 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 14, 1:58 PM EDT, 46 minutes earlier.

Area forecast discussion, Aug 14, 1:58 PM EDT, 46 minutes before

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Hazardous weather outlook, Aug 14, 3:32 AM EDT, 11 hours 12 minutes before

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In the hours before

Special weather statement, Aug 14, 2:44 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
244 PM EDT Sat Aug 14 2021

TNZ012-141930-
Scott TN-
244 PM EDT Sat Aug 14 2021

...A strong thunderstorm will impact portions of central Scott County
through 330 PM EDT...

At 243 PM EDT, Doppler radar was tracking a strong thunderstorm near
Oneida, moving southeast at 10 mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Oneida, Huntsville, Helenwood, Winfield, Norma, Slick Rock and
Robbins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 3659 8451 3649 8434 3647 8434 3646 8435
      3645 8434 3642 8435 3638 8431 3639 8433
      3637 8433 3625 8449 3647 8467
TIME...MOT...LOC 1843Z 317DEG 8KT 3648 8453

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

TD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:00 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	45 min
Aug 13, 8:32 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	29 min
Aug 13, 8:44 PM EDT	Special Weather Statement	MRX	Hawkins	46 min
Aug 13, 9:23 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins, Sullivan	52 min
Aug 13, 10:19 PM EDT	Areal Flood Advisory	MRX	Hawkins, Sullivan	116 min
Aug 14, 3:38 PM EDT	Special Weather Statement	MRX	Campbell	37 min
Aug 14, 5:48 PM EDT	Special Weather Statement	MRX	Rhea	27 min
Aug 14, 5:57 PM EDT	Severe Thunderstorm Warning	MRX	Johnson, Sullivan	33 min
Aug 14, 6:07 PM EDT	Special Weather Statement	MRX	Sequatchie	38 min
Aug 14, 6:27 PM EDT	Special Weather Statement	MRX	Claiborne	48 min
Aug 14, 6:31 PM EDT	Special Weather Statement	MRX	Claiborne	44 min
Aug 14, 6:38 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Union	37 min
Aug 14, 6:43 PM EDT	Special Weather Statement	MRX	Hancock	47 min
Aug 14, 6:53 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	37 min
Aug 14, 7:03 PM EDT	Special Weather Statement	MRX	Grainger	42 min
Aug 14, 7:24 PM EDT	Special Weather Statement	MRX	Knox	51 min
Aug 14, 7:33 PM EDT	Special Weather Statement	MRX	Bradley	27 min
Aug 14, 7:41 PM EDT	Special Weather Statement	MRX	Blount	49 min
Aug 14, 7:48 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	27 min
Aug 14, 7:57 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Sevier	33 min
Aug 13, 8:01 PM EDT	Special Weather Statement	MRX	Lee	44 min
Aug 13, 10:04 PM EDT	Special Weather Statement	MRX	Russell, Washington	41 min
Aug 13, 10:32 PM EDT	Special Weather Statement	MRX	Scott	43 min
Aug 13, 10:41 PM EDT	Special Weather Statement	MRX	Russell	49 min
Aug 13, 10:46 PM EDT	Severe Thunderstorm Warning	MRX	Russell	59 min
Aug 14, 7:06 PM EDT	Special Weather Statement	MRX	Washington	39 min
Aug 14, 7:39 PM EDT	Special Weather Statement	MRX	Scott	36 min
Aug 14, 7:43 PM EDT	Special Weather Statement	MRX	City of Bristol	32 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.