Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 438, NWS Jackson, MS

July 1, 1998Richland Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Jul 1, 1998, 4:30 PM CDT for Richland Parish, Louisiana. It was in force for 45 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
Jul 1, 1998, 4:30 PM CDT (21:30 UTC)
Expired
Jul 1, 1998, 5:15 PM CDT
In force
45 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Richland Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 158 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, Jackson, MS at 12:00Z on 1998-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2507 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, Jackson, MS at 12:00Z on 1998-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.1939Sfc1 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
2507 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
3 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 KJAN 012128
SVRJAN
LAC083-012215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
430 PM CDT WED JUL 1 1998

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RICHLAND PARISH IN NORTHEASTERN LOUISIANA

* UNTIL 515 PM CDT

* AT 430 PM CDT... RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES
  SOUTHWEST OF RAYVILLE OR 13 MILES WEST OF MANGHAM MOVING
  SOUTHEAST AT 10 MPH.

* THIS STORM WILL MAINLY AFFECT SMALLER COMMUNITIES AND RURAL AREAS.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

64

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 1, 2:54 PM CDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
254 PM CDT WED JUL 01 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0225 PM    2 NE PETAL                MS   .88 INCH HAIL
07/01/98   FORREST                        REPORTED BY EOC

0246 PM    BASSFIELD                 MS   1 INCH HAIL
07/01/98   JEFFERSON DAVIS                REPORTED BY POLICE DEPT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 3:05 PM CDTSevere Thunderstorm WarningJANMorehouse35 min
Jul 1, 3:35 PM CDTSevere Thunderstorm WarningJANRichland, West Carroll50 min
Jul 1, 3:59 PM CDTSevere Thunderstorm WarningJANEast Carroll, Madison46 min
Jul 1, 4:48 PM CDTSevere Thunderstorm WarningJANMadison47 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 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.