Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 3, NWS New Orleans, LA

January 7, 1998Harrison County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 7, 1998, 3:42 AM CST for Harrison County, Mississippi. It was in force for 48 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
Jan 7, 1998, 3:42 AM CST (09:42 UTC)
Expired
Jan 7, 1998, 4:30 AM CST
In force
48 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Harrison County, MS

The radar

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 09:45 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.7 hours before the alert went out and 62 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 00:00Z on 1998-01-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 00:00Z on 1998-01-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 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
4 J/kg
Mixed-layer CIN
-252 J/kg
Mixed-layer LCL
768 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
407 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

502 
WUUS1 KNEW 070943 RRA
SVRNEW
MSC047-071025-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
342 AM CST WED JAN 7 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHERN MISSISSIPPI

   ...NORTHERN HARRISON COUNTY

DOPPLER RADAR IN SLIDELL INDICATED A LINE OF SEVERE THUNDERSTORMS
PRODUCING DAMAGING WINDS ALONG THE HANCOCK/HARRISON COUNTY LINE...
BETWEEN VIDALIA AND SELLERS...MOVING NORTHEAST AT 35 MILES AN HOUR.
LIZANA AND SAUCIER ARE IN THE PATH OF THESE STORMS.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 6, 9:57 PM CSTFlash Flood WarningLIXAmite4 hr
Jan 6, 9:57 PM CSTFlash Flood WarningLIXPike4 hr
Jan 6, 9:57 PM CSTFlash Flood WarningLIXWilkinson4 hr
Jan 7, 1:13 AM CSTSevere Thunderstorm WarningLIXHancock32 min
Jan 7, 1:42 AM CSTFlash Flood WarningLIXHancock, Pearl River3 hr
Jan 7, 4:25 AM CSTFlash Flood WarningLIXHarrison, Jackson3 hr
Jan 7, 5:09 AM CSTFlash Flood WarningLIXPearl River116 min
Jan 7, 7:30 AM CSTFlash Flood WarningLIXHarrison, Jackson90 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.