Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 188, NWS Morristown, TN

October 8, 20145 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Oct 8, 2014, 4:40 AM EDT for 5 counties in Tennessee. It was in force for 65 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 8, 2014, 4:40 AM EDT (08:40 UTC)
Expired
Oct 8, 2014, 5:45 AM EDT
In force
65 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Bradley County, TN, Hamilton County, TN, Marion County, TN, Polk County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 93 km from the middle of the area, began a volume at 08:43 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, 8.7 hours before the alert went out and 170 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, Nashville Metro, TN at 00:00Z on 2014-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 731 joules per kilogram.LCLLFCEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 2014-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 248 square meters per square second.19395878Sfc1 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
731 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
918 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
248 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.6

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 8, 1:35 AM EDTSpecial Weather StatementMRXHancock, Hawkins, Sullivan55 min
Oct 8, 1:37 AM EDTSpecial Weather StatementMRXAnderson, Campbell, Claiborne, Hancock, Morgan, Scott and 1 more53 min
Oct 8, 3:01 AM EDTSpecial Weather StatementMRXCarter, Johnson, Sullivan, Washington59 min
Oct 8, 3:09 AM EDTSpecial Weather StatementMRXAnderson, Knox, Morgan66 min
Oct 8, 3:19 AM EDTSpecial Weather StatementMRXBledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie86 min
Oct 8, 3:51 AM EDTSevere Thunderstorm WarningMRXBledsoe, Bradley, Hamilton, McMinn, Meigs, Rhea and 1 more54 min
Oct 8, 5:45 AM EDTSpecial Weather StatementMRXPolk15 min
Oct 8, 1:04 AM EDTSpecial Weather StatementMRXLee, Russell, Wise, City of Norton56 min

Nearby

Severe 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.