Alert archive / Tennessee / Tornado Warnings in 1999

Tornado Warning 118, NWS Memphis, TN

May 5, 1999Madison County, Tennessee

NWS Memphis, TN issued this tornado warning at May 5, 1999, 7:18 PM CDT for Madison County, Tennessee. It was in force for 32 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
May 5, 1999, 7:18 PM CDT (00:18 UTC)
Expired
May 5, 1999, 7:50 PM CDT
In force
32 min
Issued by
NWS Memphis, TN
Area
Whole counties

County Madison County, TN

The radar

The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 00:18 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 5, 2:00 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.3 hours before the alert went out and 133 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 1999-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 221 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 1999-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.1939587897Sfc1 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
221 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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 Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 7:04 PM CDTTornado WarningMEGLafayette31 min
May 5, 7:09 PM CDTTornado WarningMEGPontotoc, Union46 min
May 5, 7:14 PM CDTSevere Thunderstorm WarningMEGTippah51 min
May 5, 7:34 PM CDTSevere Thunderstorm WarningMEGAlcorn, Prentiss31 min
May 5, 7:44 PM CDTSevere Thunderstorm WarningMEGLee46 min
May 5, 7:50 PM CDTSevere Thunderstorm WarningMEGTishomingo45 min
May 5, 7:40 PM CDTTornado WarningMEGMcNairy35 min
May 5, 7:44 PM CDTSevere Thunderstorm WarningMEGChester31 min
May 5, 7:49 PM CDTSevere Thunderstorm WarningMEGHardin46 min
May 5, 8:10 PM CDTSevere Thunderstorm WarningMEGCarroll, Henderson50 min

Nearby

Tornado Warnings in Tennessee, 1999Every tornado warning in 1999Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.