Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 166, NWS Jackson, MS

April 17, 1998Lamar County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 17, 1998, 5:29 PM CDT for Lamar County, Mississippi. 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
Apr 17, 1998, 5:29 PM CDT (22:29 UTC)
Expired
Apr 17, 1998, 6:15 PM CDT
In force
46 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Lamar County, MS

What was reported inside it

TimeReportWhereRemark
Apr 17, 5:35 PM CDTHail 2.5Purvis, 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.5 hours before the alert went out and 108 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.

000 
TTAA00 KJAN 172229 RRA
SVRJAN
MSC073-172315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
529 PM CDT FRI APR 17 1998

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAMAR COUNTY IN SOUTHEASTERN MISSISSIPPI

* UNTIL 615 PM CDT

* AT 529 PM CDT... A SEVERE THUNDERSTORM 7 MILES WEST OF PURVIS...
  INDICATED BY JACKSON WEATHER SERVICE DOPPLER RADAR... MOVING
  NORTHEAST 40 MPH.

* THE FOLLOWING LOCATION IS IN THE PATH OF THIS STORM...
  PURVIS                      BY 535 PM CDT

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

75

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 4:38 PM CDTSevere Thunderstorm WarningJANForrest32 min
Apr 17, 4:51 PM CDTSevere Thunderstorm WarningJANLamar34 min
Apr 17, 5:08 PM CDTSevere Thunderstorm WarningJANForrest32 min
Apr 17, 5:21 PM CDTTornado WarningJANForrest49 min
Apr 17, 5:53 PM CDTTornado WarningJANMarion47 min
Apr 17, 6:13 PM CDTTornado WarningJANLamar47 min
Apr 17, 6:30 PM CDTTornado WarningJANForrest45 min
Apr 17, 6:59 PM CDTSevere Thunderstorm WarningJANJones51 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1998Every severe thunderstorm warning 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.