Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 106, NWS Morristown, TN

August 19, 2019Blount County, Sevier County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 19, 2019, 4:26 PM EDT for Blount County, Sevier County, Tennessee. It was in force for 30 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: Aug 19, 2019, 4:26 PM EDT (20:26 UTC)
Expired: Aug 19, 2019, 4:56 PM EDT
In force: 30 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blount County, TN, Sevier County, TN

The radar

The Knoxville radar (KMRX), 56 km from the middle of the area, began a volume at 20:29 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, 8.4 hours before the alert went out and 263 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: 1458 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1290 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -66 m²/s²
0-3 km storm-relative helicity: -64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 18, 7:44 PM EDT, 20 hours 42 minutes earlier.

Area forecast discussion, Aug 18, 7:44 PM EDT, 20 hours 42 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
Aug 19, 4:20 PM EDT	Special Weather Statement	MRX	Marion	40 min
Aug 19, 4:23 PM EDT	Special Weather Statement	MRX	Marion	37 min
Aug 19, 4:59 PM EDT	Special Weather Statement	MRX	Blount	46 min
Aug 19, 5:03 PM EDT	Special Weather Statement	MRX	Unicoi, Washington	42 min
Aug 19, 5:11 PM EDT	Special Weather Statement	MRX	Sevier	49 min
Aug 19, 5:53 PM EDT	Special Weather Statement	MRX	Sevier	37 min
Aug 19, 5:57 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Knox, Sevier	48 min
Aug 19, 6:43 PM EDT	Special Weather Statement	MRX	Knox	32 min
Aug 19, 6:46 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox	31 min
Aug 19, 7:14 PM EDT	Special Weather Statement	MRX	Morgan	46 min
Aug 19, 7:39 PM EDT	Special Weather Statement	MRX	Bledsoe	36 min
Aug 19, 2:10 PM EDT	Special Weather Statement	MRX	Cherokee	35 min
Aug 19, 2:40 PM EDT	Special Weather Statement	MRX	Clay	35 min
Aug 19, 2:56 PM EDT	Special Weather Statement	MRX	Swain	19 min
Aug 19, 3:04 PM EDT	Special Weather Statement	MRX	Cherokee	26 min
Aug 19, 3:34 PM EDT	Special Weather Statement	MRX	Clay	41 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.