Alert archive / Louisiana / Tornado Warnings in 1998

Tornado Warning 21, NWS Lake Charles, LA

September 11, 1998Cameron Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Sep 11, 1998, 7:24 AM CDT for Cameron Parish, Louisiana. It was in force for 46 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: Sep 11, 1998, 7:24 AM CDT (12:24 UTC)
Expired: Sep 11, 1998, 8:10 AM CDT
In force: 46 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Cameron Parish, LA

The radar

The Lake Charles radar (KLCH), 31 km from the middle of the area, began a volume at 12:25 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 watch it was issued in

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

Issued	Product	Office	Lasted
Sep 11, 4:30 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 0.4 hours before the alert went out and 30 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: 40 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 295 m²/s²
0-3 km storm-relative helicity: 422 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

602 
WFUS1 KLCH 111225 RRA
TORLCH
LAC023-111310-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
724 AM CDT FRI SEP 11 1998

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  CAMERON PARISH IN SOUTHWESTERN LOUISIANA

* UNTIL 810 AM CDT

* AT 720 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A DEVELOPING TORNADO 44 MILES SOUTHEAST OF CAMERON OR 26 MILES
  SOUTHEAST OF GRAND CHENIER MOVING NORTHWEST AT 45 MPH.

* TORNADO WILL BE NEAR
  GRAND CHENIER BY 750 AM CDT

THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. GO TO A
SMALL INTERIOR ROOM ON THE LOWEST FLOOR. AVOID WINDOWS AND
DOORS. ABANDON CARS AND MOBILE HOMES FOR A STURDIER BUILDING
OR GET INTO A DITCH OR CULVERT.

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 11, 10:53 AM CDT	Tornado Warning	LCH	Jefferson Davis	47 min
Sep 11, 1:49 PM CDT	Flash Flood Warning	LCH	Calcasieu, Cameron	4 hr
Sep 11, 4:37 PM CDT	Flash Flood Warning	LCH	Acadia, Allen, Beauregard, Jefferson Davis	3 hr
Sep 11, 4:37 PM CDT	Flash Flood Warning	LCH	Vermilion	3 hr
Sep 11, 5:11 PM CDT	Tornado Warning	LCH	Acadia	64 min
Sep 11, 5:42 PM CDT	Tornado Warning	LCH	Jefferson Davis	43 min
Sep 11, 5:45 PM CDT	Tornado Warning	LCH	Allen, Evangeline	65 min

Nearby

Tornado Warnings in Louisiana, 1998 Every tornado warning in 1998 Tornadoes 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.