Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

March 27, 2021Campbell County, Tennessee

NWS Morristown, TN issued this special weather statement at Mar 27, 2021, 7:52 PM EDT for Campbell County, Tennessee. It was in force for 53 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 27, 2021, 7:52 PM EDT (23:52 UTC)
Expired: Mar 27, 2021, 8:45 PM EDT
In force: 53 min
Issued by: NWS Morristown, TN

County Campbell County, TN

The radar

The Knoxville radar (KMRX), 65 km from the middle of the area, began a volume at 23:54 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, 11.9 hours before the alert went out and 229 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 347 m²/s²
0-3 km storm-relative helicity: 316 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 Mar 27, 3:48 PM EDT, 4 hours 4 minutes earlier.

Area forecast discussion, Mar 27, 3:48 PM EDT, 4 hours 4 minutes before

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Hazardous weather outlook, Mar 27, 3:54 PM EDT, 3 hours 58 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
354 PM EDT Sat Mar 27 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-280800-
Cherokee-Clay-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-Roane-Loudon-
Knox-Jefferson-Northwest Blount-Blount Smoky Mountains-
North Sevier-Sevier Smoky Mountains-Sequatchie-Bledsoe-Rhea-Meigs-
McMinn-Northwest Monroe-Southeast Monroe-Marion-Hamilton-Bradley-
West Polk-East Polk-Lee-Wise-Russell-
354 PM EDT Sat Mar 27 2021 /254 PM CDT Sat Mar 27 2021/

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

.DAY ONE...This Afternoon and Tonight

Strong to severe thunderstorms are possible today, mainly west of
Interstate 75. The primary threat with these storms will be large
hail, with damaging wind gusts also possible. An isolated tornado
cannot be ruled out in the southern TN Valley this evening. In
addition heavy downpours could lead to flash flooding across the
area.

There will also be the potential for heavy rainfall today, which
could cause flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A line of showers and thunderstorms is expected to sweep across
the entire area on Sunday morning. The primary threat will be
damaging winds, but an isolated tornado cannot be ruled out. A
threat of flooding will also continue into Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter reports may be needed today and Sunday.

In the hours before

Special weather statement, Mar 27, 7:02 PM EDT, 50 minutes before

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Local storm report, Mar 27, 7:33 PM EDT, 19 minutes before

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Special weather statement, Mar 27, 7:34 PM EDT, 18 minutes before

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Special weather statement, Mar 27, 7:36 PM EDT, 16 minutes before

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Special weather statement, Mar 27, 7:40 PM EDT, 12 minutes before

Special Weather Statement
National Weather Service Morristown TN
740 PM EDT Sat Mar 27 2021

TNZ012-013-280030-
Scott TN-Campbell TN-
740 PM EDT Sat Mar 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CAMPBELL AND
NORTHERN SCOTT COUNTIES UNTIL 830 PM EDT...

At 740 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles west of Helenwood, or 11 miles east of Jamestown, moving east
at 50 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
La Follette, Oneida, Huntsville, Helenwood, Jellico, Winfield, Elk
Valley, Ketchen, Indian Mountain State Park and Honey Creek State
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3659 8409 3639 8408 3639 8467 3641 8466
      3644 8469 3650 8471 3656 8476 3660 8442
TIME...MOT...LOC 2340Z 268DEG 42KT 3647 8472

Diegan

Special weather statement, Mar 27, 7:52 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
752 PM EDT Sat Mar 27 2021

TNZ013-014-037-280045-
Claiborne TN-Union TN-Campbell TN-
752 PM EDT Sat Mar 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CLAIBORNE...CENTRAL
CAMPBELL AND NORTHWESTERN UNION COUNTIES UNTIL 845 PM EDT...

At 752 PM EDT, Doppler radar was tracking a strong thunderstorm near
La Follette, moving east at 30 mph.

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

Locations impacted include...
La Follette, Jacksboro, Caryville, Fincastle and Sharps Chapel.

LAT...LON 3633 8425 3645 8425 3653 8381 3632 8380
TIME...MOT...LOC 2352Z 265DEG 26KT 3640 8420

Diegan

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 5:03 AM EDT	Special Weather Statement	MRX	Marion, Sequatchie	42 min
Mar 27, 5:23 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	39 min
Mar 27, 5:47 AM EDT	Special Weather Statement	MRX	Hamilton	43 min
Mar 27, 6:08 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	52 min
Mar 27, 6:41 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Polk	49 min
Mar 27, 7:46 AM EDT	Special Weather Statement	MRX	Roane	44 min
Mar 27, 7:58 AM EDT	Severe Thunderstorm Warning	MRX	Morgan	47 min
Mar 27, 8:27 AM EDT	Special Weather Statement	MRX	Scott	48 min
Mar 27, 8:37 AM EDT	Special Weather Statement	MRX	Knox	38 min
Mar 27, 8:42 AM EDT	Severe Thunderstorm Warning	MRX	Scott	26 min
Mar 27, 8:58 AM EDT	Special Weather Statement	MRX	Knox, Loudon	47 min
Mar 27, 9:18 AM EDT	Severe Thunderstorm Warning	MRX	Grainger, Knox, Union	42 min
Mar 27, 9:39 AM EDT	Severe Thunderstorm Warning	MRX	Knox, Sevier	30 min
Mar 27, 9:43 AM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Grainger, Hancock, Hawkins	47 min
Mar 27, 10:00 AM EDT	Severe Thunderstorm Warning	MRX	Cocke, Hamblen, Jefferson	45 min
Mar 27, 10:06 AM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	54 min
Mar 27, 10:14 AM EDT	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Scott	46 min
Mar 27, 10:30 AM EDT	Special Weather Statement	MRX	Hawkins	45 min
Mar 27, 10:33 AM EDT	Severe Thunderstorm Warning	MRX	Greene	42 min
Mar 27, 10:33 AM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne	42 min
Mar 27, 10:36 AM EDT	Flash Flood Warning	MRX	Morgan, Scott	4 hr
Mar 27, 10:41 AM EDT	Severe Thunderstorm Warning	MRX	Hawkins	49 min
Mar 27, 10:51 AM EDT	Special Weather Statement	MRX	Anderson, Morgan	39 min
Mar 27, 11:00 AM EDT	Special Weather Statement	MRX	Claiborne	45 min
Mar 27, 11:07 AM EDT	Severe Thunderstorm Warning	MRX	Sullivan	38 min
Mar 27, 11:11 AM EDT	Severe Thunderstorm Warning	MRX	Unicoi, Washington	35 min
Mar 27, 11:20 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Union	40 min
Mar 27, 11:30 AM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Hancock	22 min
Mar 27, 11:32 AM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan, Unicoi, Washington	43 min
Mar 27, 11:45 AM EDT	Areal Flood Advisory	MRX	Hawkins, Sullivan	3 hr
Mar 27, 11:46 AM EDT	Special Weather Statement	MRX	Hamblen, Jefferson	44 min
Mar 27, 11:48 AM EDT	Areal Flood Advisory	MRX	Campbell, Claiborne	3 hr
Mar 27, 11:50 AM EDT	Areal Flood Advisory	MRX	Carter, Greene, Washington	3 hr
Mar 27, 11:56 AM EDT	Special Weather Statement	MRX	Monroe	49 min
Mar 27, 12:07 PM EDT	Areal Flood Advisory	MRX	Anderson, Knox	3 hr
Mar 27, 12:12 PM EDT	Areal Flood Advisory	MRX	Claiborne, Hancock	3 hr
Mar 27, 12:17 PM EDT	Special Weather Statement	MRX	Johnson	43 min
Mar 27, 12:23 PM EDT	Special Weather Statement	MRX	Hawkins	52 min
Mar 27, 1:01 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan, Unicoi, Washington	44 min
Mar 27, 3:13 PM EDT	Wind Advisory	MRX	Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more	23 hr
Mar 27, 3:34 PM EDT	Special Weather Statement	MRX	Campbell, Morgan	41 min
Mar 27, 5:05 PM EDT	Areal Flood Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	3 hr
Mar 27, 5:38 PM EDT	Areal Flood Warning	MRX	Claiborne, Grainger, Hancock, Hawkins, Union	3 hr
Mar 27, 5:49 PM EDT	Special Weather Statement	MRX	Anderson, Morgan	41 min
Mar 27, 6:13 PM EDT	Areal Flood Warning	MRX	Blount, Sevier	3 hr
Mar 27, 6:59 PM EDT	Special Weather Statement	MRX	Morgan, Scott	46 min
Mar 27, 7:02 PM EDT	Special Weather Statement	MRX	Marion, Sequatchie	43 min
Mar 27, 7:15 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Scott	45 min
Mar 27, 7:34 PM EDT	Special Weather Statement	MRX	Hancock	41 min
Mar 27, 7:36 PM EDT	Special Weather Statement	MRX	Meigs	39 min
Mar 27, 7:40 PM EDT	Special Weather Statement	MRX	Campbell, Scott	50 min
Mar 27, 7:43 PM EDT	Severe Thunderstorm Warning	MRX	Marion	47 min
Mar 27, 11:43 AM EDT	Severe Thunderstorm Warning	MRX	Washington	32 min
Mar 27, 12:02 PM EDT	Areal Flood Advisory	MRX	Washington, City of Bristol	3 hr
Mar 27, 12:54 PM EDT	Special Weather Statement	MRX	Russell, Washington, City of Bristol	51 min
Mar 27, 2:03 PM EDT	Areal Flood Advisory	MRX	Washington	117 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.