Alert archive / Tennessee / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 46, NWS Nashville, TN

February 7, 19994 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 7, 1999, 3:54 AM CST for 4 counties in Tennessee. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Feb 7, 1999, 3:54 AM CST (09:54 UTC)
Expired
Feb 7, 1999, 4:40 AM CST
In force
46 min
Issued by
NWS Nashville, TN
Area
Whole counties

Counties Cheatham County, TN, Davidson County, TN, Robertson County, TN, Williamson County, TN

What was reported inside it

TimeReportWhereRemark
Feb 7, 4:34 AM CSTThunderstorm Wind 50Springfield, TNEMA reported structural damage to a building at intersection of Youngville and Lakeview Roads.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 9.9 hours before the alert went out and 315 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, Little Rock, AR at 00:00Z on 1999-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 179 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, Little Rock, AR at 00:00Z on 1999-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 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
179 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
726 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 7, 2:36 AM CSTSevere Thunderstorm WarningOHXBenton, Decatur34 min
Feb 7, 2:56 AM CSTSevere Thunderstorm WarningOHXHumphreys, Perry49 min
Feb 7, 3:23 AM CSTSevere Thunderstorm WarningOHXDickson, Hickman, Lewis47 min
Feb 7, 3:23 AM CSTSevere Thunderstorm WarningOHXWayne47 min
Feb 7, 3:54 AM CSTSevere Thunderstorm WarningOHXMaury46 min
Feb 7, 4:18 AM CSTSevere Thunderstorm WarningOHXSumner, Wilson47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.