Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 77, NWS Lake Charles, LA

February 26, 1998Cameron Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 26, 1998, 7:30 AM CST for Cameron Parish, Louisiana. It was in force for 60 min. 2 reports 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
Feb 26, 1998, 7:30 AM CST (13:30 UTC)
Expired
Feb 26, 1998, 8:30 AM CST
In force
60 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 13:30 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

TimeReportWhereRemark
Feb 26, 7:30 AM CSTThunderstorm WindCameron, LA
Feb 26, 7:58 AM CSTThunderstorm WindHackberry, 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 watch it was issued in

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

IssuedProductOfficeLasted
Feb 26, 6:30 AM CSTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.5 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 1998-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 428 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 1998-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 square meters per square second.1939587897Sfc1 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
428 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
263 m²/s²
0-3 km storm-relative helicity
323 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLCH 261330 RRA
SVRLCH
LAC023-261430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
730 AM CST THU FEB 26 1998

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES LA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN LOUISIANA

   ...CAMERON PARISH

AT 730 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS FROM NEAR BEAUMONT TO SEA RIM STATE
PARK TO 25 MILES OFFSHORE MOVING EAST AT 45 MPH.

THE COMMUNITIES OF JOHNSONS BAYOU...HOLLY BEACH...CAMERON...AND
HACKBERRY ARE IN THE PATH OF THIS LINE.

EXPECT WIND GUSTS IN EXCESS OF 65 MPH AND DIME SIZE HAIL WITH THIS
LINE.

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND TORRENTIAL RAIN. FOR
YOUR PROTECTION...SEEK SHELTER IN A STRONG BUILDING. STAY AWAY
FROM WINDOWS AND AVOID USING TELEP@HONES...COMPUTERS...OR OTHER
ELECTRICAL EQUIPMENT UNTIL THE STORM HAS PASSED.

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 Feb 26, 2:20 AM CST, 5 hours 10 minutes earlier.

Area forecast discussion, Feb 26, 2:20 AM CST, 5 hours 10 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
220 AM CST THU FEB 26 1998

APPROACHING SQUALL LINE WILL AFFECT N PORTIONS OF FA AND MAY BUILD
SOUTHWARD AS IT MOVES EAST. ALTHOUGH CURRENT RADAR TRENDS NOT SHOWING
ANY SOUTHWARD BUILDING. SVR WIND GUSTS AND SMALL HAIL A POSSIBILITY
AS THE LINE MOVES THROUGH. KLCH VWP SHOWING 45 TO 50 KT SE FLOW AT
2 KFT. LATEST SFC ANALYSIS INDICATING DW PTS IN LOWER 60S AHEAD OF
LINE...PROVIDING AN ABUNDANCE OF LLM. SFC LOW WILL WORK NE UP TX
COAST LATER THIS MORNING AS SFC TROF PUSHES EAST.

KHGX RADAR SHOWING SHOWERS AND THUNDERSTORMS BACK TO THE SW BEHIND
THE LINE AS ADDITIONAL ENERGY REMAINS BEHIND LEAD SHRT WV. FOR THIS
REASON WILL INCLUDE SCT POPS FOR BPT AREA FOR MORN ACTIVITY. IN
AGREEMENT WITH 94E...WHICH SHOWS FLASH FLOOD THREAT IN CEN LA
AND NORTHWARD WHICH IS IN AXIS OF BEST DYNAMICS COUPLED WITH DEEP
MOISTURE. DRYING WILL OCCUR BEHIND SFC TROF LATER THIS AFT. S PORTIONS
OF LA WILL LIKELY SEE BEST RAIN CHC LATER IN THE MORNING AS PACIFIC
FRONT MOVES THROUGH.  HIGH TEMPS SHOULD MAKE IT INTO THE 70S IN BREEZY
W FLOW THIS AFT. ANOTHER SFC TROF WILL APPROACH NW PORTIONS OF FA FRIDAY
NIGHT AND MAY ACT AS FOCUS FOR A FEW SHWRS IF ENOUGH MOISTURE IS PRESENT.

1

BPT 76/43/65 600
LCH 75/44/64 700
LFT 75/45/64 700
AEX 73/42/64 800

In the hours before

Local storm report, Feb 26, 7:30 AM CST, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
730 AM CST THU FEB 26 1998

TIME(CST)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

730  AM    JEFFERSON CITY            TX   60 MPH TSTM GUST
02/26/98   JEFFERSON

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 26, 7:44 AM CSTSevere Thunderstorm WarningLCHCalcasieu46 min
Feb 26, 8:15 AM CSTSevere Thunderstorm WarningLCHJefferson Davis60 min
Feb 26, 8:18 AM CSTSevere Thunderstorm WarningLCHRapides62 min
Feb 26, 8:43 AM CSTSevere Thunderstorm WarningLCHAcadia, Evangeline, Saint Landry62 min
Feb 26, 9:06 AM CSTTornado WarningLCHAvoyelles, Evangeline64 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm warning 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.