Alert archive / Louisiana / Tornado Warnings in 1998

Tornado Warning 23, NWS Lake Charles, LA

September 11, 1998Acadia Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Sep 11, 1998, 5:11 PM CDT for Acadia Parish, Louisiana. It was in force for 64 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: Sep 11, 1998, 5:11 PM CDT (22:11 UTC)
Expired: Sep 11, 1998, 6:15 PM CDT
In force: 64 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Acadia Parish, LA

The radar

The Lake Charles radar (KLCH), 79 km from the middle of the area, began a volume at 22:11 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.

What was reported inside it

Time	Report	Where	Remark
Sep 11, 5:18 PM CDT	Tornado F0	Midland, LA

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 nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.2 hours before the alert went out and 78 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.

638 
WFUS1 KLCH 112214 RRA
TORLCH
LAC001-112315-

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

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 615 PM CDT

* AT 508 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 10 MILES SOUTHWEST OF CROWLEY OR 1 MILE SOUTHEAST OF
  MORSE MOVING NORTH AT 35 MPH.

* TORNADO WILL BE NEAR
  ESTHERWOOD BY 515 PM CDT
  CROWLEY BY 515 PM CDT
  MERMENTAU BY 520 PM CDT
  EGAN  BY 520 PM 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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 7:24 AM CDT	Tornado Warning	LCH	Cameron	46 min
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, 5:42 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.