Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

March 27, 2021Knox County, Tennessee

NWS Morristown, TN issued this special weather statement at Mar 27, 2021, 8:37 AM EDT for Knox County, Tennessee. It was in force for 38 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, 8:37 AM EDT (12:37 UTC)
Expired
Mar 27, 2021, 9:15 AM EDT
In force
38 min
Issued by
NWS Morristown, TN

County Knox County, TN

The radar

The Knoxville radar (KMRX), 84 km from the middle of the area, began a volume at 12:37 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, 0.6 hours before the alert went out and 210 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2021-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2021-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 347 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

884 
WWUS84 KMRX 271237
SPSMRX

Special Weather Statement
National Weather Service Morristown TN
837 AM EDT Sat Mar 27 2021
 
TNZ036-067-069-271315-
Anderson TN-Roane TN-Knox TN-
837 AM EDT Sat Mar 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ANDERSON...NORTHWESTERN
KNOX AND NORTHEASTERN ROANE COUNTIES UNTIL 915 AM EDT...

At 837 AM EDT, Doppler radar was tracking a strong thunderstorm near
Oak Ridge, moving northeast at 45 mph.

Penny size hail will be possible with this storm.

Locations impacted include...
Knoxville, Oak Ridge, Clinton, Kingston, Farragut, Oliver Springs,
Norris, Bradbury, Powell and Karns.

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 3592 8447 3621 8406 3600 8389 3587 8424
      3590 8428 3589 8429 3588 8428 3589 8431
      3589 8433 3584 8434 3582 8439
TIME...MOT...LOC 1237Z 234DEG 38KT 3589 8437 

$$

DGS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 27, 5:03 AM EDTSpecial Weather StatementMRXMarion, Sequatchie42 min
Mar 27, 5:23 AM EDTSevere Thunderstorm WarningMRXBledsoe, Hamilton, Marion, Sequatchie39 min
Mar 27, 5:47 AM EDTSpecial Weather StatementMRXHamilton43 min
Mar 27, 6:08 AM EDTSevere Thunderstorm WarningMRXBradley, Hamilton52 min
Mar 27, 6:41 AM EDTSevere Thunderstorm WarningMRXBradley, Polk49 min
Mar 27, 7:46 AM EDTSpecial Weather StatementMRXRoane44 min
Mar 27, 7:58 AM EDTSevere Thunderstorm WarningMRXMorgan47 min
Mar 27, 8:27 AM EDTSpecial Weather StatementMRXScott48 min
Mar 27, 8:42 AM EDTSevere Thunderstorm WarningMRXScott26 min
Mar 27, 8:58 AM EDTSpecial Weather StatementMRXKnox, Loudon47 min
Mar 27, 9:18 AM EDTSevere Thunderstorm WarningMRXGrainger, Knox, Union42 min
Mar 27, 9:39 AM EDTSevere Thunderstorm WarningMRXKnox, Sevier30 min
Mar 27, 9:43 AM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger, Hancock, Hawkins47 min
Mar 27, 10:00 AM EDTSevere Thunderstorm WarningMRXCocke, Hamblen, Jefferson45 min
Mar 27, 10:06 AM EDTSevere Thunderstorm WarningMRXCampbell, Scott54 min
Mar 27, 10:14 AM EDTSpecial Weather StatementMRXAnderson, Campbell, Morgan, Scott46 min
Mar 27, 10:30 AM EDTSpecial Weather StatementMRXHawkins45 min
Mar 27, 10:33 AM EDTSevere Thunderstorm WarningMRXGreene42 min
Mar 27, 10:33 AM EDTSevere Thunderstorm WarningMRXCampbell, Claiborne42 min
Mar 27, 10:36 AM EDTFlash Flood WarningMRXMorgan, Scott4 hr
Mar 27, 10:41 AM EDTSevere Thunderstorm WarningMRXHawkins49 min
Mar 27, 10:51 AM EDTSpecial Weather StatementMRXAnderson, Morgan39 min
Mar 27, 11:00 AM EDTSpecial Weather StatementMRXClaiborne45 min
Mar 27, 11:07 AM EDTSevere Thunderstorm WarningMRXSullivan38 min
Mar 27, 11:11 AM EDTSevere Thunderstorm WarningMRXUnicoi, Washington35 min
Mar 27, 11:20 AM EDTSpecial Weather StatementMRXGrainger, Hamblen, Union40 min
Mar 27, 11:30 AM EDTSevere Thunderstorm WarningMRXClaiborne, Hancock22 min
Mar 27, 11:32 AM EDTSevere Thunderstorm WarningMRXCarter, Johnson, Sullivan, Unicoi, Washington43 min
Mar 27, 11:45 AM EDTAreal Flood AdvisoryMRXHawkins, Sullivan3 hr
Mar 27, 11:46 AM EDTSpecial Weather StatementMRXHamblen, Jefferson44 min
Mar 27, 11:48 AM EDTAreal Flood AdvisoryMRXCampbell, Claiborne3 hr
Mar 27, 11:50 AM EDTAreal Flood AdvisoryMRXCarter, Greene, Washington3 hr
Mar 27, 11:56 AM EDTSpecial Weather StatementMRXMonroe49 min
Mar 27, 12:07 PM EDTAreal Flood AdvisoryMRXAnderson, Knox3 hr
Mar 27, 12:12 PM EDTAreal Flood AdvisoryMRXClaiborne, Hancock3 hr
Mar 27, 12:17 PM EDTSpecial Weather StatementMRXJohnson43 min
Mar 27, 12:23 PM EDTSpecial Weather StatementMRXHawkins52 min
Mar 27, 1:01 PM EDTSevere Thunderstorm WarningMRXCarter, Johnson, Sullivan, Unicoi, Washington44 min
Mar 27, 3:13 PM EDTWind AdvisoryMRXBlount, Carter, Cocke, Greene, Johnson, Monroe and 2 more23 hr
Mar 27, 3:34 PM EDTSpecial Weather StatementMRXCampbell, Morgan41 min
Mar 27, 5:05 PM EDTAreal Flood WarningMRXAnderson, Campbell, Claiborne, Morgan, Scott, Union3 hr
Mar 27, 5:38 PM EDTAreal Flood WarningMRXClaiborne, Grainger, Hancock, Hawkins, Union3 hr
Mar 27, 5:49 PM EDTSpecial Weather StatementMRXAnderson, Morgan41 min
Mar 27, 6:13 PM EDTAreal Flood WarningMRXBlount, Sevier3 hr
Mar 27, 6:59 PM EDTSpecial Weather StatementMRXMorgan, Scott46 min
Mar 27, 7:02 PM EDTSpecial Weather StatementMRXMarion, Sequatchie43 min
Mar 27, 7:15 PM EDTSevere Thunderstorm WarningMRXCampbell, Scott45 min
Mar 27, 7:34 PM EDTSpecial Weather StatementMRXHancock41 min
Mar 27, 7:36 PM EDTSpecial Weather StatementMRXMeigs39 min
Mar 27, 7:40 PM EDTSpecial Weather StatementMRXCampbell, Scott50 min
Mar 27, 7:43 PM EDTSevere Thunderstorm WarningMRXMarion47 min
Mar 27, 7:52 PM EDTSpecial Weather StatementMRXCampbell53 min
Mar 27, 11:43 AM EDTSevere Thunderstorm WarningMRXWashington32 min
Mar 27, 12:02 PM EDTAreal Flood AdvisoryMRXWashington, City of Bristol3 hr
Mar 27, 12:54 PM EDTSpecial Weather StatementMRXRussell, Washington, City of Bristol51 min
Mar 27, 2:03 PM EDTAreal Flood AdvisoryMRXWashington117 min

Nearby

Special Weather Statements in Tennessee, 2021Every 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.