Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 29, NWS Lake Charles, LA

July 6, 2002Jefferson County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 6, 2002, 4:11 PM CDT for Jefferson County, Texas. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2002, 4:11 PM CDT (21:11 UTC)
Expired
Jul 6, 2002, 5:00 PM CDT
In force
49 min
Issued by
NWS Lake Charles, LA
Area
Counties, with a storm outline in the text

County Jefferson County, TX

The radar

The Lake Charles radar (KLCH), 94 km from the middle of the area, began a volume at 21:14 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.

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, 9.2 hours before the alert went out and 96 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2002-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1192 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2002-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1192 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
875 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
21 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.

000 
WUUS54 KLCH 062111
SVRLCH
TXC245-062200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
409 PM CDT SAT JUL 6 2002

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JEFFERSON COUNTY IN SOUTHEAST TEXAS

* UNTIL 500 PM CDT

* AT 404 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES NORTHEAST OF BEAUMONT...MOVING
  NORTHEAST AT 5 MPH.

* THIS STORM WILL BE NEAR...

  THE BEAUMONT AND MID COUNTY AREAS BY 418 PM CDT

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

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

LAT...LON 3017 9425 2988 9432 2988 9402 3014 9412

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 5, 8:40 PM CDT, 19 hours 31 minutes earlier.

Area forecast discussion, Jul 5, 8:40 PM CDT, 19 hours 31 minutes before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL
WEATHER SERVICE LAKE CHARLES LA
840 PM CDT FRI JUL 5 2002

SFC ANALYSIS SHOWS VERY WEAK TROFFING BASICALLY BISECTING THE FCST
AREA SE-NW. ALONG THIS TROF...SCT RW/TRW HAVE DEVELOPED AND ARE
DROPPING SWD. SOME OF THESE STORMS...MAINLY ACROSS S-CNTL LA & THE
CSTL WTRS...HAVE BEEN RATHER STRONG WITH NUMEROUS POSITIVE-STRIKES.
WHILE THERMALLY-DRIVEN...THERE MAY BE SOME INFLUENCE FROM ENERGY
ROUNDING LO PRES ALOFT OFF THE FL GULF CST. KLCH 00Z SOUNDING SHOWS
CONTINUED DRY CONDITIONS (PWAT 1.4) WHILE KLIX RAOB IS MOISTER (PWAT
2.0). THEREFORE SOME OF THIS ACTIVITY COULD REMAIN AFTER SUNSET...
AND WILL HOLD ONTO SMALL POPS ACROSS ACADIANA TNGT. PERSISTENT TEMPS
LOOK FINE TO ME.

.LCH...NONE.

.PRELIMINARY NUMBERS...
AEX 74/96/74/95/74/93/75 1324251
BPT 77/93/76/93/76/90/76 -324252
LCH 76/93/75/92/76/90/76 -324252
LFT 76/92/76/92/76/91/75 2324252

LGE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:14 PM CDTSevere Thunderstorm WarningLCHJefferson46 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.