Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 11, NWS Morristown, TN

April 14, 20195 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 14, 2019, 6:01 PM EDT for 5 counties in Tennessee. It was in force for 44 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: Apr 14, 2019, 6:01 PM EDT (22:01 UTC)
Expired: Apr 14, 2019, 6:45 PM EDT
In force: 44 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Grainger County, TN, Hamblen County, TN, Jefferson County, TN, Knox County, TN, Sevier County, TN

The radar

The Knoxville radar (KMRX), 17 km from the middle of the area, began a volume at 22:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 14, 4:28 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.0 hours before the alert went out and 312 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: 413 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 390 m²/s²
0-3 km storm-relative helicity: 373 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.4

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 Apr 14, 2:18 PM EDT, 3 hours 43 minutes earlier.

Area forecast discussion, Apr 14, 2:18 PM EDT, 3 hours 43 minutes before

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Hazardous weather outlook, Apr 14, 2:23 PM EDT, 3 hours 38 minutes before

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In the hours before

Local storm report, Apr 14, 2:36 PM EDT, 3 hours 25 minutes before

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Local storm report, Apr 14, 3:09 PM EDT, 2 hours 52 minutes before

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Local storm report, Apr 14, 3:10 PM EDT, 2 hours 51 minutes before

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Local storm report, Apr 14, 3:11 PM EDT, 2 hours 50 minutes before

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Special weather statement, Apr 14, 4:48 PM EDT, 1 hour 13 minutes before

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Special weather statement, Apr 14, 5:58 PM EDT, 3 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
Apr 14, 7:12 AM EDT	Special Weather Statement	MRX	Bledsoe, Hamilton, Marion, Sequatchie	63 min
Apr 14, 8:14 AM EDT	Special Weather Statement	MRX	Bledsoe, Hamilton, Meigs, Rhea	46 min
Apr 14, 8:49 AM EDT	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Roane, Scott	41 min
Apr 14, 8:54 AM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Meigs, Rhea	36 min
Apr 14, 9:05 AM EDT	Special Weather Statement	MRX	Bradley, McMinn	40 min
Apr 14, 9:14 AM EDT	Severe Thunderstorm Warning	MRX	Roane	35 min
Apr 14, 9:47 AM EDT	Special Weather Statement	MRX	Polk	43 min
Apr 14, 6:31 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hancock, Hawkins	29 min
Apr 14, 7:13 PM EDT	Special Weather Statement	MRX	Greene, Hawkins	47 min
Apr 14, 7:25 PM EDT	Special Weather Statement	MRX	Johnson, Sullivan	50 min
Apr 14, 6:53 PM EDT	Special Weather Statement	MRX	Scott, City of Norton	37 min
Apr 14, 7:12 PM EDT	Special Weather Statement	MRX	Russell	33 min
Apr 14, 7:34 PM EDT	Special Weather Statement	MRX	Russell	41 min
Apr 14, 4:48 PM EDT	Special Weather Statement	MRX	Clay	42 min
Apr 14, 5:58 PM EDT	Special Weather Statement	MRX	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.