Alert archive / Mississippi / Tornado Warnings in 1998

Tornado Warning 11, NWS New Orleans, LA

April 17, 1998Walthall County, Mississippi

NWS New Orleans, LA issued this tornado warning at Apr 17, 1998, 5:33 PM CDT for Walthall County, Mississippi. It was in force for 62 min. 3 reports 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: Apr 17, 1998, 5:33 PM CDT (22:33 UTC)
Expired: Apr 17, 1998, 6:35 PM CDT
In force: 62 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Walthall County, MS

What was reported inside it

Time	Report	Where
Apr 17, 5:35 PM CDT	Thunderstorm Wind	Simonds, MS
Apr 17, 5:50 PM CDT	Hail 1.75	Tylertown, MS
Apr 17, 6:25 PM CDT	Hail 1.75	Kirklin, MS

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 17, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.6 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

000 
TTAA00 KNEW 172233 RRA
TORNEW
MSC147-172335-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A...

* TORNADO WARNING FOR
   - WALTHALL COUNTY SOUTHERN MISSISSIPPI

* UNTIL 635 PM CDT

* AT 532 PM CDT... SHERIFFS DEPARTMENT REPORTED A TORNADO 6 MILES
EAST OF OSAYKA MOVING EAST AT 40 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
     TYLERTOWN BY 540 PM.

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.

Issued	Product	Office	Counties	Lasted
Apr 17, 5:00 PM CDT	Severe Thunderstorm Warning	LIX	Amite	65 min
Apr 17, 5:00 PM CDT	Severe Thunderstorm Warning	LIX	Pike	65 min
Apr 17, 5:30 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	65 min
Apr 17, 5:59 PM CDT	Severe Thunderstorm Warning	LIX	Pike	31 min
Apr 17, 6:04 PM CDT	Tornado Warning	LIX	Pearl River	31 min
Apr 17, 6:23 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	32 min
Apr 17, 6:33 PM CDT	Severe Thunderstorm Warning	LIX	Pearl River	47 min
Apr 17, 6:52 PM CDT	Severe Thunderstorm Warning	LIX	Pike	33 min

Nearby

Tornado Warnings in Mississippi, 1998 Every tornado warning in 1998 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.