Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 52, NWS Lake Charles, LA

July 23, 2002Allen Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 23, 2002, 5:03 PM CDT for Allen Parish, Louisiana. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 23, 2002, 5:03 PM CDT (22:03 UTC)
Expired: Jul 23, 2002, 6:05 PM CDT
In force: 62 min
Issued by: NWS Lake Charles, LA
Area: Counties, with a storm outline in the text

County Allen Parish, LA

What was reported inside it

Time	Report	Where	Remark
Jul 23, 5:14 PM CDT	Thunderstorm Wind	Oakdale, 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.1 hours before the alert went out and 73 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: 1339 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 934 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 3 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.

413 
WUUS54 KLCH 232203
SVRLCH
LAC003-232305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
505 PM CDT TUE JUL 23 2002

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEN PARISH IN SOUTHWEST LOUISIANA

* UNTIL 605 PM CDT

* AT 505 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHWEST OF OAKDALE...MOVING SOUTH AT
  5 MPH.

* THIS STORM WILL BE NEAR...
  MITTIE BY 550 PM CDT
  OBERLIN BY 530 PM CDT

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN.

THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY LARGE HAIL WHICH COULD
CAUSE SIGNIFICANT DAMAGE TO PROPERTY.

CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE.

LAT...LON 3082 9296 3047 9296 3052 9266 3084 9265

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.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 4:35 PM CDT, 28 minutes earlier.

Area forecast discussion, Jul 23, 4:35 PM CDT, 28 minutes before

SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
435 PM CDT TUE JUL 23 2002

LOOKS LIKE A REPEAT OF LAST NIGHT MAY BE SETTING UP ACROSS THE
REGION WITH THUNDERSTORM ACTIVITY DEVELOPING A LITTLE EARLIER THAN
EXPECTED.

THE FOCUS OF THUNDERSTORM DEVELOPMENT WILL LIKELY OCCUR WHERE
NUMEROUS OUTFLOWS CONVERGE AND SIGNIFICANT LIFT OCCURS.

THE STRONGEST OUTFLOW CONVERGENCE NEAR ALLEN AND BEAUREGARD
PARISHES WILL BE THE MAIN FOCUS OF STRONG THUNDERSTORM DEVELOPMENT
INITIALLY THIS AFTERNOON WITH FUTURE DEVELOPMENT EXPECTED FURTHER
SOUTH AS THE EVENING PROGRESSES.

WILL UPDATE THE ZONES ACCORDINGLY.

.LCH...NONE.

.UPDATED NUMBERS...
       WE    TH    FR SA   T W T F
BPT 74/94 75/94 76/94 77  4313242
LCH 75/94 74/93 76/93 77  4413342
LFT 75/94 76/94 75/93 77  2425252
AEX 74/93 74/92 74/95 76  4425341

MAYEAUX/ALLEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:07 PM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	53 min
Jul 22, 7:16 PM CDT	Severe Thunderstorm Warning	LCH	Evangeline	59 min
Jul 22, 7:27 PM CDT	Severe Thunderstorm Warning	LCH	Vernon	63 min
Jul 22, 7:46 PM CDT	Severe Thunderstorm Warning	LCH	Allen	59 min
Jul 22, 8:09 PM CDT	Severe Thunderstorm Warning	LCH	Acadia	66 min
Jul 22, 8:26 PM CDT	Severe Thunderstorm Warning	LCH	Jefferson Davis	64 min
Jul 22, 8:31 PM CDT	Severe Thunderstorm Warning	LCH	Beauregard	59 min
Jul 22, 8:57 PM CDT	Severe Thunderstorm Warning	LCH	Vermilion	63 min
Jul 22, 10:00 PM CDT	Special Marine Warning	LCH		60 min
Jul 23, 5:28 PM CDT	Special Marine Warning	LCH		62 min
Jul 23, 5:44 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	61 min
Jul 23, 6:05 PM CDT	Severe Thunderstorm Warning	LCH	Allen	30 min
Jul 23, 6:06 PM CDT	Severe Thunderstorm Warning	LCH	Allen	29 min
Jul 23, 6:28 PM CDT	Severe Thunderstorm Warning	LCH	Jefferson Davis	62 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2002 Every severe thunderstorm warning in 2002

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.