Alert archive / Mississippi / Tornado Warnings in 1998

Tornado Warning 12, NWS New Orleans, LA

April 17, 1998Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Apr 17, 1998, 6:04 PM CDT for Pearl River County, Mississippi. It was in force for 31 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 17, 1998, 6:04 PM CDT (23:04 UTC)
Expired
Apr 17, 1998, 6:35 PM CDT
In force
31 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Pearl River County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 17, 5:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.1 hours before the alert went out and 59 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, Slidell Radar S, LA at 12:00Z on 1998-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1365 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, Slidell Radar S, LA at 12:00Z on 1998-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
1365 J/kg
Mixed-layer CIN
-125 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

670 
WFUS1 KNEW 172303 RRA
TORNEW
MSC109-172335-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
604 PM CDT FRI APR 17 1998

THE NATIONAL WEATHER SERVICE HAS ISSUED A...

* TORNADO WARNING FOR
   - NORTHERN PEARL RIVER COUNTY SOUTHERN MISSISSIPPI

* UNTIL 635 PM CDT

* AT 601 PM CDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  WITH A POSSIBLE TORNADO 22 MILES NORTHWEST OF POPLARVILLE

* THE TORNADO WILL MOVE ACROSS THE NORTH PART PEARL RIVER COUNTY.

IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM
AWAYFROM WINDOWS

IF YOU ARE IN THE PATH OF A TORNADO...GET UNDER A WORKBENCH OR PIECE
OF STURDY FURNITURE. SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A
CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...OR CUSHIONS TO
COVER YOUR BODY.  AVOID WINDOWS.

&

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 5:00 PM CDTSevere Thunderstorm WarningLIXAmite65 min
Apr 17, 5:00 PM CDTSevere Thunderstorm WarningLIXPike65 min
Apr 17, 5:30 PM CDTSevere Thunderstorm WarningLIXWalthall65 min
Apr 17, 5:33 PM CDTTornado WarningLIXWalthall62 min
Apr 17, 5:59 PM CDTSevere Thunderstorm WarningLIXPike31 min
Apr 17, 6:23 PM CDTSevere Thunderstorm WarningLIXWalthall32 min
Apr 17, 6:33 PM CDTSevere Thunderstorm WarningLIXPearl River47 min
Apr 17, 6:52 PM CDTSevere Thunderstorm WarningLIXPike33 min

Nearby

Tornado Warnings in Mississippi, 1998Every tornado warning in 1998Tornadoes in 1998

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.