Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 21, NWS Jackson, MS

January 8, 1999East Carroll Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Jan 8, 1999, 8:20 PM CST for East Carroll 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: Jan 8, 1999, 8:20 PM CST (02:20 UTC)
Expired: Jan 8, 1999, 9:05 PM CST
In force: 45 min
Issued by: NWS Jackson, MS
Area: Whole counties

County East Carroll Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 8, 8:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 2.3 hours before the alert went out and 118 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: 81 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1125 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 257 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.

999 
WUUS1 KJAN 090221 RRA
SVRJAN
LAC035-MSC055-151-090305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
820 PM CST FRI JAN 8 1999

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ISSAQUENA COUNTY IN WEST CENTRAL MISSISSIPPI
  WASHINGTON COUNTY IN NORTHWESTERN MISSISSIPPI
  EAST CARROLL PARISH IN NORTHEASTERN LOUISIANA

* UNTIL 905 PM CST

* AT 816 PM CST... RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM 5 MILES NORTH OF EUDORA TO OAK GROVE. THIS LINE IS MOVING EAST
AT 40 MILES PER HOUR. DAMAGING WINDS ARE LIKELY WITH THIS LINE OF
STROMS.

* SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
GREENVILLE BY 840 PM
HIGHLAND BY 840 PM
MAYERSVILLE BY 847 PM


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.

67

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

Special weather statement, Jan 8, 2:40 PM CST, 5 hours 40 minutes before

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
090400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
240 PM CST FRI JAN 8 1999

A TORNADO WATCH IS IN EFFECT FOR MOST OF NORTHWEST AND WEST
CENTRAL MISSISSIPPI TILL 800 PM TONIGHT. THIS TORNADO WATCH AREA
MAY BE EXTENDED FARTHER TO THE EAST IN MISSISSIPPI LATER TONIGHT.
SCATTERED THUNDERSTORMS OVER MAINLY WEST AND NORTH MISSISSIPPI TODAY
WILL GRADUALLY INCREASE AND MOVE FARTHER EASTWARD TONIGHT.  A
DEVELOPING LOW PRESSURE SYSTEM WILL MOVE FROM THE ARKLATEX REGION
TODAY AND WILL WOVE INTO TENNESSEE BY LATE THIS EVENING.
THUNDERSTORMS WILL ORGANIZE ALONG THE TRAILING STRONG COLD
FRONT THAT IS FORECAST TO SWEEP EASTWARD DURING THE NIGHT BRINGING THE
THREAT FOR DAMAGING WINDS AND LARGE HAIL THROUGH MOST OF THE STATE.

ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY
MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL BE NECESSARY IN COUNTIES AND
PARISHES COVERED BY THE CURRENT TORNADO WATCH AND MAY BECOME NECESSARY IN
ADDITIONAL COUTIES IN MISSISSIPPI LATER TONIGHT.

Local storm report, Jan 8, 6:27 PM CST, 1 hour 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
627 PM CST FRI JAN 08 1999

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

0338 PM    4 W OAK GROVE             LA   TORNADO
01/08/99   WEST CARROLL                   TORNADO SIGHTED ON GROUND
                                          BY HAM RADIO
                                          SPOTTER...SOME STRUCTURAL
                                          DAMAGE

0400 PM    4 N LAKE PROVIDENCE       LA   WIND DAMAGE
01/08/99   EAST CARROLL                   WIND DAMAGE/TREES DOWN IN
                                          AREA...POSSIBLE TORNADO

0435 PM    GRACE                     MS   .75 INCH HAIL
01/08/99   ISSAQUENA

0515 PM    SILVER CITY               MS   TORNADO
01/08/99   HUMPHREYS                      SPOTTER REPORTED TORNADO
                                          ON GROUND IN AREA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 8, 6:20 PM CST	Tornado Warning	JAN	East Carroll	35 min
Jan 8, 6:32 PM CST	Severe Thunderstorm Warning	JAN	West Carroll	33 min
Jan 8, 7:39 PM CST	Severe Thunderstorm Warning	JAN	Morehouse	51 min
Jan 8, 8:12 PM CST	Severe Thunderstorm Warning	JAN	West Carroll	33 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1999 Every severe thunderstorm warning in 1999

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.