Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 72, NWS Morristown, TN

June 17, 2015Marion County, Sequatchie County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 17, 2015, 11:59 PM CDT for Marion County, Sequatchie 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 counties it named.

The facts

Issued: Jun 17, 2015, 11:59 PM CDT (04:59 UTC)
Expired: Jun 18, 2015, 12:37 AM CDT
In force: 38 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 63 km from the middle of the area, began a volume at 05:00 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, 5.0 hours before the alert went out and 138 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: 193 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 41 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 Jun 17, 8:33 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Jun 17, 8:33 PM CDT, 3 hours 26 minutes before

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Hazardous weather outlook, Jun 17, 7:59 PM CDT, 4 hours before

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In the hours before

Special weather statement, Jun 17, 11:51 PM CDT, 8 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 17, 11:51 PM CDT	Special Weather Statement	MRX	Marion	39 min
Jun 18, 1:21 PM CDT	Special Weather Statement	MRX	Anderson	39 min
Jun 18, 1:57 PM CDT	Special Weather Statement	MRX	Scott	48 min
Jun 18, 2:27 PM CDT	Special Weather Statement	MRX	Morgan	18 min
Jun 18, 2:39 PM CDT	Special Weather Statement	MRX	Bradley, Polk	36 min
Jun 18, 3:11 PM CDT	Special Weather Statement	MRX	Cocke	49 min
Jun 18, 4:44 PM CDT	Special Weather Statement	MRX	Bradley	31 min
Jun 18, 5:24 PM CDT	Special Weather Statement	MRX	Meigs, Roane	36 min
Jun 18, 5:57 PM CDT	Special Weather Statement	MRX	Loudon	48 min
Jun 18, 5:59 PM CDT	Special Weather Statement	MRX	Roane	46 min
Jun 18, 6:07 PM CDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon, Roane	23 min
Jun 18, 6:28 PM CDT	Special Weather Statement	MRX	Knox	47 min
Jun 18, 6:35 PM CDT	Special Weather Statement	MRX	Sevier	25 min
Jun 18, 6:37 PM CDT	Special Weather Statement	MRX	Cocke	23 min
Jun 18, 6:42 PM CDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	48 min
Jun 18, 6:57 PM CDT	Special Weather Statement	MRX	Knox	48 min
Jun 18, 1:27 PM CDT	Special Weather Statement	MRX	Russell	48 min
Jun 18, 3:31 PM CDT	Special Weather Statement	MRX	Cherokee	29 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015 Every severe thunderstorm warning in 2015

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.