Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

May 28, 2021Grainger County, Tennessee

NWS Morristown, TN issued this special weather statement at May 28, 2021, 3:00 PM EDT for Grainger County, Tennessee. It was in force for 45 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: May 28, 2021, 3:00 PM EDT (19:00 UTC)
Expired: May 28, 2021, 3:45 PM EDT
In force: 45 min
Issued by: NWS Morristown, TN

County Grainger County, TN

The radar

The Knoxville radar (KMRX), 18 km from the middle of the area, began a volume at 19:01 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, 7.0 hours before the alert went out and 287 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: 204 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 749 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 May 28, 11:52 AM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, May 28, 11:52 AM EDT, 3 hours 8 minutes before

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Hazardous weather outlook, May 28, 3:24 AM EDT, 11 hours 36 minutes before

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In the hours before

Special weather statement, May 28, 2:44 PM EDT, 16 minutes before

Special Weather Statement
National Weather Service Morristown TN
244 PM EDT Fri May 28 2021

TNZ015-016-038-VAZ001-005-281930-
Hancock TN-Grainger TN-Hawkins TN-Scott VA-Lee VA-
244 PM EDT Fri May 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR HAWKINS...HANCOCK...NORTHEASTERN
GRAINGER...SOUTHEASTERN LEE AND SOUTHWESTERN SCOTT COUNTIES UNTIL 330
PM EDT...

At 243 PM EDT, Doppler radar was tracking a strong thunderstorm near
Rogersville, moving east at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Rogersville, Sneedville, Bean Station, Surgoinsville, Church Hill,
Duffield, Evanston, Treadway, Okolona and Kepler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 3642 8269 3639 8275 3635 8336 3643 8338
      3648 8337 3676 8281
TIME...MOT...LOC 1843Z 258DEG 18KT 3647 8309

Moulton

Special weather statement, May 28, 3:00 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
300 PM EDT Fri May 28 2021

TNZ014>016-038-281945-
Claiborne TN-Hancock TN-Grainger TN-Hawkins TN-
300 PM EDT Fri May 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CLAIBORNE...WEST
CENTRAL HAWKINS...WESTERN HANCOCK AND GRAINGER COUNTIES UNTIL 345 PM
EDT...

At 300 PM EDT, Doppler radar was tracking a strong thunderstorm near
Rutledge, moving northeast at 25 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Rutledge, Bean Station, Lone Mountain, Howard Quarter, Thorn Hill,
Mooresburg, Evanston, Joppa and Treadway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 8334 3634 8317 3633 8318 3632 8317
      3632 8320 3631 8320 3628 8332 3630 8333
      3628 8334 3627 8336 3620 8369 3626 8370
      3629 8368 3630 8369 3634 8367 3635 8367
TIME...MOT...LOC 1900Z 239DEG 23KT 3632 8358

Moulton

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 2:44 PM EDT	Special Weather Statement	MRX	Hancock, Hawkins	46 min
May 28, 2:58 PM EDT	Areal Flood Advisory	MRX	Campbell, Morgan, Scott	3 hr
May 28, 3:08 PM EDT	Special Weather Statement	MRX	Sullivan	37 min
May 28, 3:33 PM EDT	Special Weather Statement	MRX	Campbell, Morgan, Roane, Scott	42 min
May 28, 3:54 PM EDT	Special Weather Statement	MRX	Loudon	36 min
May 28, 3:58 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Morgan, Roane	47 min
May 28, 4:13 PM EDT	Special Weather Statement	MRX	Anderson, Claiborne, Grainger, Knox, Union	47 min
May 28, 4:18 PM EDT	Special Weather Statement	MRX	Monroe	42 min
May 28, 4:32 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox, Union	43 min
May 28, 4:56 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Jefferson	49 min
May 28, 5:02 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson	43 min
May 28, 5:18 PM EDT	Special Weather Statement	MRX	Greene, Hamblen, Hancock, Hawkins, Jefferson	42 min
May 28, 5:35 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins	40 min
May 28, 5:40 PM EDT	Special Weather Statement	MRX	Monroe, Polk	65 min
May 28, 5:58 PM EDT	Special Weather Statement	MRX	Carter, Sullivan, Washington	62 min
May 28, 6:42 PM EDT	Special Weather Statement	MRX	Carter, Johnson	48 min
May 28, 6:46 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson	29 min
May 28, 3:38 PM EDT	Special Weather Statement	MRX	Washington	37 min
May 28, 6:29 PM EDT	Special Weather Statement	MRX	Cherokee, Clay	46 min
May 28, 7:28 PM EDT	Special Weather Statement	MRX	Clay	47 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.