Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

August 7, 2021Madison County, North Carolina

NWS Morristown, TN issued this special weather statement at Aug 7, 2021, 4:40 PM EDT for Madison County, North Carolina. It was in force for 20 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 7, 2021, 4:40 PM EDT (20:40 UTC)
Expired: Aug 7, 2021, 5:00 PM EDT
In force: 20 min
Issued by: NWS Morristown, TN
Hail: 0.50 in
Wind: 40

County Madison County, NC

The radar

The Knoxville radar (KMRX), 53 km from the middle of the area, began a volume at 20:40 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.7 hours before the alert went out and 269 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: 17 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

558 
WWUS84 KMRX 072040
SPSMRX

Special Weather Statement
National Weather Service Morristown TN
440 PM EDT Sat Aug 7 2021
 
TNZ041-043-072100-
Cocke Smoky Mountains TN-Southeast Greene TN-
440 PM EDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of east central Cocke
and south central Greene Counties through 500 PM EDT...

At 440 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hot Springs, or 15 miles east of Newport, moving east at 15 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...
Cedar Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3590 8301 3597 8300 3603 8293 3603 8289
      3602 8272 3600 8278 3598 8279 3597 8277
      3592 8282 3595 8285 3595 8288 3594 8290
      3593 8291 3593 8292 3588 8290 3587 8292
      3586 8292
TIME...MOT...LOC 2040Z 279DEG 12KT 3595 8292 

MAX HAIL SIZE...0.50 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 7, 10:51 AM EDT	Areal Flood Advisory	MRX	Sevier	114 min
Aug 7, 11:14 AM EDT	Special Weather Statement	MRX	Sevier	46 min
Aug 7, 11:20 AM EDT	Special Weather Statement	MRX	Rhea	25 min
Aug 7, 11:44 AM EDT	Special Weather Statement	MRX	Jefferson	31 min
Aug 7, 11:54 AM EDT	Special Weather Statement	MRX	Hamilton	36 min
Aug 7, 12:00 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Knox, Sevier	45 min
Aug 7, 12:09 PM EDT	Areal Flood Advisory	MRX	Sevier	66 min
Aug 7, 1:08 PM EDT	Special Weather Statement	MRX	Morgan	37 min
Aug 7, 1:13 PM EDT	Special Weather Statement	MRX	Bradley	32 min
Aug 7, 1:23 PM EDT	Areal Flood Advisory	MRX	Knox	112 min
Aug 7, 1:31 PM EDT	Special Weather Statement	MRX	Claiborne	44 min
Aug 7, 1:41 PM EDT	Special Weather Statement	MRX	Hawkins	34 min
Aug 7, 1:53 PM EDT	Special Weather Statement	MRX	Claiborne	37 min
Aug 7, 2:00 PM EDT	Areal Flood Advisory	MRX	Morgan	103 min
Aug 7, 2:03 PM EDT	Special Weather Statement	MRX	Hawkins	27 min
Aug 7, 2:10 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	30 min
Aug 7, 2:15 PM EDT	Special Weather Statement	MRX	Union	30 min
Aug 7, 2:19 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins, Sullivan, Washington	30 min
Aug 7, 2:39 PM EDT	Special Weather Statement	MRX	Grainger	36 min
Aug 7, 2:48 PM EDT	Special Weather Statement	MRX	Washington	27 min
Aug 7, 2:52 PM EDT	Special Weather Statement	MRX	Knox	23 min
Aug 7, 3:15 PM EDT	Areal Flood Advisory	MRX	Knox	2 hr
Aug 7, 3:19 PM EDT	Areal Flood Advisory	MRX	Hawkins, Sullivan	3 hr
Aug 7, 3:24 PM EDT	Special Weather Statement	MRX	Sullivan	51 min
Aug 7, 3:30 PM EDT	Special Weather Statement	MRX	Sevier	30 min
Aug 7, 3:33 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr
Aug 7, 3:37 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	53 min
Aug 7, 3:53 PM EDT	Special Weather Statement	MRX	Johnson	37 min
Aug 7, 4:06 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Sevier	39 min
Aug 7, 4:14 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	27 min
Aug 7, 4:35 PM EDT	Special Weather Statement	MRX	Cocke	25 min
Aug 7, 5:06 PM EDT	Special Weather Statement	MRX	Hawkins	39 min
Aug 7, 5:43 PM EDT	Special Weather Statement	MRX	Blount	47 min
Aug 7, 11:04 AM EDT	Areal Flood Advisory	MRX	Wise	116 min
Aug 7, 3:01 PM EDT	Special Weather Statement	MRX	City of Bristol	29 min
Aug 7, 4:07 PM EDT	Severe Thunderstorm Warning	MRX	Russell	23 min
Aug 7, 4:28 PM EDT	Special Weather Statement	MRX	Scott	47 min

Nearby

Special Weather Statements in North Carolina, 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.