Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 46, NWS Morristown, TN

June 20, 20198 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 20, 2019, 6:31 AM EDT for 8 counties in Tennessee. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 20, 2019, 6:31 AM EDT (10:31 UTC)
Expired: Jun 20, 2019, 7:30 AM EDT
In force: 59 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bradley County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 133 km from the middle of the area, began a volume at 10:32 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 00:00Z, 10.5 hours before the alert went out and 194 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: 406 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1659 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 20, 3:48 AM EDT, 2 hours 43 minutes earlier.

Area forecast discussion, Jun 20, 3:48 AM EDT, 2 hours 43 minutes before

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Hazardous weather outlook, Jun 20, 4:00 AM EDT, 2 hours 31 minutes before

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In the hours before

Special weather statement, Jun 20, 1:40 AM EDT, 4 hours 51 minutes before

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Special weather statement, Jun 20, 1:43 AM EDT, 4 hours 48 minutes before

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Special weather statement, Jun 20, 1:47 AM EDT, 4 hours 44 minutes before

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Special weather statement, Jun 20, 1:50 AM EDT, 4 hours 41 minutes before

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Local storm report, Jun 20, 5:43 AM EDT, 48 minutes before

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Local storm report, Jun 20, 6:16 AM EDT, 15 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
Jun 19, 10:35 PM EDT	Special Weather Statement	MRX	Scott	55 min
Jun 19, 11:02 PM EDT	Special Weather Statement	MRX	Bledsoe	58 min
Jun 19, 11:19 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	41 min
Jun 19, 11:30 PM EDT	Special Weather Statement	MRX	Sequatchie	45 min
Jun 19, 11:36 PM EDT	Special Weather Statement	MRX	Meigs, Rhea, Roane	39 min
Jun 19, 11:51 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Loudon, Roane	24 min
Jun 19, 11:54 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	66 min
Jun 20, 12:13 AM EDT	Special Weather Statement	MRX	Loudon	47 min
Jun 20, 12:34 AM EDT	Special Weather Statement	MRX	Anderson, Claiborne, Grainger, Hancock, Union	56 min
Jun 20, 12:42 AM EDT	Special Weather Statement	MRX	Monroe	48 min
Jun 20, 12:54 AM EDT	Special Weather Statement	MRX	Blount, Jefferson, Knox, Sevier	51 min
Jun 20, 1:12 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Hancock, Hawkins, Jefferson	48 min
Jun 20, 1:47 AM EDT	Special Weather Statement	MRX	Hawkins, Sullivan, Washington	43 min
Jun 20, 1:50 AM EDT	Special Weather Statement	MRX	Cocke, Greene, Hamblen	40 min
Jun 20, 5:05 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Sequatchie	55 min
Jun 20, 5:07 AM EDT	Areal Flood Advisory	MRX	Scott	3 hr
Jun 20, 5:57 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, Marion, Meigs, Rhea and 1 more	63 min
Jun 20, 6:47 AM EDT	Special Weather Statement	MRX	Greene, Hamblen	58 min
Jun 20, 7:07 AM EDT	Areal Flood Advisory	MRX	Grainger, Hamblen, Jefferson, Knox, Union	113 min
Jun 20, 7:16 AM EDT	Special Weather Statement	MRX	Blount, Jefferson, Knox, Loudon, Sevier	44 min
Jun 20, 7:26 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Jefferson, Knox, Monroe, Sevier	64 min
Jun 20, 8:00 AM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Union	45 min
Jun 20, 8:02 AM EDT	Special Weather Statement	MRX	Carter, Johnson, Sullivan, Washington	58 min
Jun 20, 8:38 AM EDT	Special Weather Statement	MRX	Greene, Hancock, Hawkins, Sullivan, Washington	67 min
Jun 20, 4:15 PM EDT	Special Weather Statement	MRX	Anderson	45 min
Jun 20, 4:59 PM EDT	Special Weather Statement	MRX	Knox	46 min
Jun 20, 5:02 PM EDT	Special Weather Statement	MRX	Hancock	43 min
Jun 20, 5:14 PM EDT	Tornado Warning	MRX	Hancock, Hawkins	31 min
Jun 20, 5:19 PM EDT	Tornado Warning	MRX	Knox	26 min
Jun 20, 5:24 PM EDT	Special Weather Statement	MRX	Blount, Loudon	51 min
Jun 20, 5:28 PM EDT	Special Weather Statement	MRX	Washington	47 min
Jun 20, 5:34 PM EDT	Tornado Warning	MRX	Greene, Hawkins	16 min
Jun 20, 5:41 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Unicoi, Washington	49 min
Jun 20, 5:44 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Knox, Sevier	46 min
Jun 20, 6:14 PM EDT	Special Weather Statement	MRX	Blount	31 min
Jun 20, 6:25 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	65 min
Jun 20, 6:29 PM EDT	Special Weather Statement	MRX	Cocke	46 min
Jun 20, 7:14 PM EDT	Special Weather Statement	MRX	McMinn, Meigs	61 min
Jun 20, 7:21 PM EDT	Special Weather Statement	MRX	Washington	39 min
Jun 20, 7:29 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	46 min
Jun 20, 7:56 PM EDT	Special Weather Statement	MRX	Polk	64 min
Jun 20, 12:52 AM EDT	Special Weather Statement	MRX	Lee, Scott	38 min
Jun 20, 1:40 AM EDT	Special Weather Statement	MRX	Scott, Wise, City of Norton	65 min
Jun 20, 9:20 AM EDT	Special Weather Statement	MRX	Russell, Washington, City of Bristol	55 min
Jun 20, 1:43 AM EDT	Special Weather Statement	MRX	Cherokee, Clay	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.