Alert archive / Virginia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 186, NWS Morristown, TN

October 6, 2014Hancock County, Tennessee; Lee County, Scott County, Wise County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Oct 6, 2014, 6:40 PM EDT for Hancock County, Tennessee; Lee County, Scott County, Wise County, Virginia. It was in force for 50 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
Oct 6, 2014, 6:40 PM EDT (22:40 UTC)
Expired
Oct 6, 2014, 7:30 PM EDT
In force
50 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Hancock County, TN, Lee County, VA, Scott County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 77 km from the middle of the area, began a volume at 22:42 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.7 hours before the alert went out and 311 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2014-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2014-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1173 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 6, 10:20 AM EDTSpecial Weather StatementMRXCumberland55 min
Oct 6, 10:26 AM EDTSpecial Weather StatementMRXRoane34 min
Oct 6, 11:40 AM EDTSpecial Weather StatementMRXAnderson, Knox, Union35 min
Oct 6, 4:38 PM EDTSpecial Weather StatementMRXMorgan, Scott52 min
Oct 6, 6:08 PM EDTSpecial Weather StatementMRXClaiborne37 min
Oct 6, 6:51 PM EDTSpecial Weather StatementMRXHamilton54 min
Oct 6, 7:34 PM EDTSpecial Weather StatementMRXBradley41 min
Oct 6, 7:51 PM EDTSpecial Weather StatementMRXBlount39 min
Oct 6, 6:27 PM EDTSpecial Weather StatementMRXLee33 min
Oct 6, 7:19 PM EDTSpecial Weather StatementMRXRussell, Scott, City of Norton41 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2014Severe Thunderstorm Warnings in Tennessee, 2014Every severe thunderstorm warning in 2014

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.