Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 170, NWS Morristown, TN

July 5, 2008Campbell County, Union County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 5, 2008, 4:46 PM EDT for Campbell County, Union County, 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: Jul 5, 2008, 4:46 PM EDT (20:46 UTC)
Expired: Jul 5, 2008, 5:45 PM EDT
In force: 59 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Campbell County, TN, Union County, TN

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.8 hours before the alert went out and 334 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: 762 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 75 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 Jul 5, 2:46 PM EDT, 2 hours earlier.

Area forecast discussion, Jul 5, 2:46 PM EDT, 2 hours before

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Hazardous weather outlook, Jul 5, 5:48 AM EDT, 10 hours 58 minutes before

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In the hours before

Special weather statement, Jul 5, 4:33 PM EDT, 13 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
Jul 4, 8:25 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Union	35 min
Jul 4, 9:00 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Union	45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2008 Every severe thunderstorm warning in 2008

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.