Alert archive / Louisiana / Tornado Warnings in 1999

Tornado Warning 21, NWS Jackson, MS

January 21, 1999West Carroll Parish, Louisiana

NWS Jackson, MS issued this tornado warning at Jan 21, 1999, 7:35 PM CST for West Carroll Parish, Louisiana. It was in force for 50 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: Jan 21, 1999, 7:35 PM CST (01:35 UTC)
Expired: Jan 21, 1999, 8:25 PM CST
In force: 50 min
Issued by: NWS Jackson, MS
Area: Whole counties

County West Carroll Parish, LA

What was reported inside it

Time	Report	Where	Remark
Jan 21, 7:45 PM CST	Tornado F0	Kilbourne, LA	Several trees were blown down.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Jan 21, 2:45 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.6 hours before the alert went out and 139 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: 957 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1350 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 263 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KJAN 220136 RRA
TORJAN
LAC123-220225-

BULLETIN- EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
735 PM CST THU JAN 21 1999

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CARROLL PARISH IN NORTHEASTERN LOUISIANA

* UNTIL 825 PM CST

* AT 734 PM CST... RADAR DETECTED A TORNADO 18 MILES SOUTHWEST OF
  OAK GROVE OR 13 MILES SOUTHWEST OF FOREST... MOVING NORTHEAST AT
  50 MPH.

* SOME LOCATIONS IN THE PATH OF THIS DANGEROUS STORM INCLUDE...
  FOREST AT 750 PM CST
  OAK GROVE AT 755 PM CST
  KILBOURNE AT 805 PM CST

IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.

67

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 6:33 PM CST	Tornado Warning	JAN	Morehouse	47 min
Jan 21, 7:07 PM CST	Severe Thunderstorm Warning	JAN	Richland	48 min
Jan 21, 7:32 PM CST	Severe Thunderstorm Warning	JAN	Franklin	48 min
Jan 21, 8:03 PM CST	Severe Thunderstorm Warning	JAN	Catahoula	32 min
Jan 21, 8:12 PM CST	Severe Thunderstorm Warning	JAN	East Carroll	48 min
Jan 21, 8:47 PM CST	Tornado Warning	JAN	Franklin	48 min
Jan 21, 8:55 PM CST	Tornado Warning	JAN	Catahoula	50 min
Jan 21, 9:21 PM CST	Severe Thunderstorm Warning	JAN	East Carroll	49 min
Jan 21, 9:30 PM CST	Tornado Warning	JAN	Franklin	35 min
Jan 21, 9:42 PM CST	Severe Thunderstorm Warning	JAN	Tensas	48 min
Jan 21, 9:49 PM CST	Tornado Warning	JAN	East Carroll	46 min
Jan 21, 9:55 PM CST	Tornado Warning	JAN	Catahoula	50 min
Jan 21, 10:00 PM CST	Tornado Warning	JAN	Tensas	50 min
Jan 21, 10:09 PM CST	Tornado Warning	JAN	Madison	51 min
Jan 21, 10:36 PM CST	Tornado Warning	JAN	Franklin	49 min
Jan 21, 11:12 PM CST	Tornado Warning	JAN	Madison	48 min
Jan 22, 6:53 AM CST	Tornado Warning	JAN	Morehouse	47 min
Jan 22, 7:33 AM CST	Tornado Warning	JAN	West Carroll	37 min
Jan 22, 7:40 AM CST	Tornado Warning	JAN	Morehouse	40 min
Jan 22, 11:51 AM CST	Severe Thunderstorm Warning	JAN	Catahoula, Concordia	49 min
Jan 22, 12:10 PM CST	Tornado Warning	JAN	Catahoula	50 min
Jan 22, 12:39 PM CST	Tornado Warning	JAN	Tensas	46 min
Jan 22, 12:48 PM CST	Tornado Warning	JAN	Concordia	47 min
Jan 22, 1:12 PM CST	Tornado Warning	JAN	Madison	48 min

Nearby

Tornado Warnings in Louisiana, 1999 Every tornado warning in 1999 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.