Alert archive / Tennessee / Special Weather Statements in 2020

Special Weather Statement, NWS Morristown, TN

March 24, 2020Blount County, Tennessee

NWS Morristown, TN issued this special weather statement at Mar 24, 2020, 10:39 PM EDT for Blount County, Tennessee. It was in force for 36 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: Mar 24, 2020, 10:39 PM EDT (02:39 UTC)
Expired: Mar 24, 2020, 11:15 PM EDT
In force: 36 min
Issued by: NWS Morristown, TN

County Blount County, TN

The radar

The Knoxville radar (KMRX), 85 km from the middle of the area, began a volume at 02:42 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 00:00Z, 2.7 hours before the alert went out and 246 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: 93 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1542 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Mar 24, 8:59 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Mar 24, 8:59 PM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Mar 24, 3:38 PM EDT, 7 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Morristown TN
338 PM EDT Tue Mar 24 2020

NCZ060-061-TNZ067-068-071-072-081>087-098>102-251945-
Cherokee-Clay-Roane-Loudon-Northwest Blount-
Blount Smoky Mountains-Sequatchie-Bledsoe-Rhea-Meigs-McMinn-
Northwest Monroe-Southeast Monroe-Marion-Hamilton-Bradley-
West Polk-East Polk-
338 PM EDT Tue Mar 24 2020 /238 PM CDT Tue Mar 24 2020/

This Hazardous Weather Outlook is for portions of southwest North
Carolina and east Tennessee.

.DAY ONE...This Afternoon and Tonight

Severe storms and flash flooding will be possible late this
afternoon and evening.

Late this afternoon and evening, scattered strong to severe
storms will move into the southern half of the Tennessee Valley.
Damaging winds will be the primary threat with these storms, with
some large hail a lesser threat. Additional heavy rains with these
storms will also pose a threat of flash flooding. There is also a
possibility of a tornado or two occurring.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed during the evening hours.

TNZ012>018-035>047-069-070-073-074-VAZ001-002-005-006-008-251945-
Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan-Johnson-Morgan-
Anderson-Union-Grainger-Hamblen-Northwest Cocke-
Cocke Smoky Mountains-Northwest Greene-Southeast Greene-
Washington-Unicoi-Northwest Carter-Southeast Carter-Knox-
Jefferson-North Sevier-Sevier Smoky Mountains-Lee-Wise-Russell-
338 PM EDT Tue Mar 24 2020

This Hazardous Weather Outlook is for portions of east Tennessee
and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

Strong storms are expected this afternoon and evening. Though
widespread severe weather is not expected, some of these could
become marginally severe, with large hail and damaging winds a
possibility.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, Mar 24, 6:04 PM EDT, 4 hours 35 minutes before

Special Weather Statement
National Weather Service Morristown TN
604 PM EDT Tue Mar 24 2020

TNZ012>014-037-242245-
Claiborne TN-Union TN-Scott TN-Campbell TN-
604 PM EDT Tue Mar 24 2020

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CLAIBORNE...CAMPBELL...
NORTHWESTERN UNION AND NORTHEASTERN SCOTT COUNTIES UNTIL 645 PM
EDT...

At 604 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Jacksboro, or 10 miles west of La Follette, moving
east at 55 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
La Follette, Jacksboro, Huntsville, Jellico, Caryville, Springdale,
Elk Valley, Sandlick, Clairfield and Fincastle.

LAT...LON 3658 8371 3639 8366 3629 8446 3648 8448
      3659 8404
TIME...MOT...LOC 2204Z 254DEG 46KT 3642 8431

Diegan

Special weather statement, Mar 24, 6:41 PM EDT, 3 hours 58 minutes before

Special Weather Statement
National Weather Service Morristown TN
641 PM EDT Tue Mar 24 2020

TNZ014-015-VAZ001-242330-
Claiborne TN-Hancock TN-Lee VA-
641 PM EDT Tue Mar 24 2020

...SIGNIFICANT WEATHER ADVISORY FOR CLAIBORNE...HANCOCK AND
SOUTHWESTERN LEE COUNTIES UNTIL 730 PM EDT...

At 641 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles southeast of Pruden, or 11 miles southwest of Middlesboro,
moving east at 45 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Sneedville, New Tazewell, Tazewell, Harrogate, Springdale, Howard
Quarter, Evanston, Cumberland Gap, Arthur and Rose Hill.

LAT...LON 3651 8312 3646 8316 3645 8320 3643 8320
      3641 8322 3641 8334 3642 8336 3641 8339
      3642 8343 3641 8343 3640 8378 3642 8381
      3643 8380 3642 8383 3643 8386 3656 8390
      3659 8380 3658 8369 3662 8365 3674 8314
TIME...MOT...LOC 2241Z 259DEG 40KT 3647 8382

DGS

Special weather statement, Mar 24, 9:33 PM EDT, 1 hour 6 minutes before

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Special weather statement, Mar 24, 9:55 PM EDT, 44 minutes before

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Special weather statement, Mar 24, 10:39 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 8:11 PM EDT	Tornado Warning	MRX	Marion	34 min
Mar 24, 8:43 PM EDT	Tornado Warning	MRX	Marion, Sequatchie	20 min
Mar 24, 9:33 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	42 min
Mar 24, 9:34 PM EDT	Areal Flood Advisory	MRX	Hamilton, Marion, Sequatchie	3 hr
Mar 24, 9:55 PM EDT	Special Weather Statement	MRX	Hamilton	50 min
Mar 25, 9:25 AM EDT	River Flood Warning	MRX	Claiborne, Grainger, Hancock	22 hr
Mar 25, 9:25 AM EDT	River Flood Warning	MRX	Cocke	13 hr
Mar 25, 9:29 AM EDT	River Flood Advisory	MRX	Cocke, Jefferson	12 hr
Mar 25, 9:29 AM EDT	River Flood Advisory	MRX	Hancock	12 hr
Mar 25, 9:29 AM EDT	River Flood Advisory	MRX	Claiborne, Union	12 hr
Mar 25, 11:15 AM EDT	River Flood Advisory	MRX	Morgan, Roane	12 hr
Mar 25, 11:15 AM EDT	River Flood Advisory	MRX	Hawkins, Sullivan	12 hr
Mar 25, 11:15 AM EDT	River Flood Advisory	MRX	Hancock	12 hr
Mar 25, 11:15 AM EDT	River Flood Advisory	MRX	Russell, Scott, Wise	12 hr
Mar 24, 11:37 PM EDT	Special Weather Statement	MRX	Clay	38 min

Nearby

Special Weather Statements in Tennessee, 2020 Every special weather statement in 2020

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.