Alert archive / Mississippi / Tornado Warnings in 1999

Tornado Warning 101, NWS Memphis, TN

April 3, 1999Lafayette County, Marshall County, Mississippi

NWS Memphis, TN issued this tornado warning at Apr 3, 1999, 8:18 PM CST for Lafayette County, Marshall County, Mississippi. 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
Apr 3, 1999, 8:18 PM CST (02:18 UTC)
Expired
Apr 3, 1999, 8:50 PM CST
In force
32 min
Issued by
NWS Memphis, TN
Area
Whole counties

Counties Lafayette County, MS, Marshall County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 3, 7:00 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 2.3 hours before the alert went out and 51 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 1999-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 1999-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -231 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
25 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-231 m²/s²
0-3 km storm-relative helicity
-324 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMEM 040218 RRA
TORMEM
MSC071-093-040250-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
818 PM CST SAT APR 3 1999


THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN LAFAYETTE COUNTY IN NORTHWESTERN MISSISSIPPI
  SOUTHERN MARSHALL COUNTY IN NORTHWESTERN MISSISSIPPI

* UNTIL 850 PM CST

* AT 817 PM CST..RADAR INDICATED A POSSIBLE TORNADO OVER NORTHWEST
LAFAYETTE COUNTY SOUTH OF HARMONTOWN. THE STORM WAS MOVING NORTHEAST
AT 35 MPH AND WILL BE IN THE ABBEVILLE AND LAWS HILL AREAS BY
825 PM...AND NEAR POTTS CAMP BY 840 PM.

.THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH8...LARGE HAIL...AND
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A PLACE OF SAFETY...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 6:32 PM CSTSevere Thunderstorm WarningMEGTunica48 min
Apr 3, 8:06 PM CSTSevere Thunderstorm WarningMEGMarshall49 min
Apr 3, 8:43 PM CSTSevere Thunderstorm WarningMEGBenton47 min

Nearby

Tornado Warnings in Mississippi, 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.