Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 162, NWS Jackson, MS

April 16, 1998Grenada County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 16, 1998, 6:38 PM CDT for Grenada County, Mississippi. It was in force for 32 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 16, 1998, 6:38 PM CDT (23:38 UTC)
Expired: Apr 16, 1998, 7:10 PM CDT
In force: 32 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Grenada County, MS

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 16, 4:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.6 hours before the alert went out and 119 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: 708 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

265 
WUUS1 KJAN 162339 RRA
SVRJAN
MSC043-170010-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
638 PM CDT THU APR 16 1998

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GRENADA COUNTY IN NORTH CENTRAL MISSISSIPPI

* UNTIL 710 PM CDT

* AT 636 PM CDT...A SEVERE THUNDERSTORM 9 MILES EAST OF GRENADA
OR 5 MILES WEST OF GORE SPRINGS...INDICATED BY JACKSON WEATHER
SERVICE DOPPLER RADAR... MOVING EAST AT 40 MPH.

* THIS STORM WILL MAINLY AFFECT GORE SPRINGS ALONG HWY 8.

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS A TORNADO
WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

76


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 4:07 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	33 min
Apr 16, 4:27 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	33 min
Apr 16, 4:39 PM CDT	Tornado Warning	JAN	Bolivar	46 min
Apr 16, 4:53 PM CDT	Tornado Warning	JAN	Sunflower	47 min
Apr 16, 5:02 PM CDT	Severe Thunderstorm Warning	JAN	Oktibbeha	48 min
Apr 16, 5:17 PM CDT	Tornado Warning	JAN	Leflore	43 min
Apr 16, 5:45 PM CDT	Severe Thunderstorm Warning	JAN	Grenada	45 min
Apr 16, 5:54 PM CDT	Severe Thunderstorm Warning	JAN	Simpson	46 min
Apr 16, 6:28 PM CDT	Severe Thunderstorm Warning	JAN	Carroll	47 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1998 Every 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.