Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 69, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 21, 1998, 11:40 PM CST for Jefferson County, Texas. It was in force for 60 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
- Feb 21, 1998, 11:40 PM CST (05:40 UTC)
- Expired
- Feb 22, 1998, 12:40 AM CST
- In force
- 60 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Jefferson County, TX
The radar
The Lake Charles radar (KLCH), 95 km from the middle of the area, began a volume at 05:44 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 |
|---|---|---|---|
| Feb 22, 12:30 AM CST | Thunderstorm Wind | Nederland, TX |
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 00:00Z, 5.7 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1523 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
221 WUUS1 KLCH 220542 RRA SVRLCH TXC245-220630- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 1140 PM CST SAT FEB 21 1998 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES LA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1240 AM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN TEXAS ...JEFFERSON COUNTY AT 1139 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS MOVING EAST AT 35 MPH. THIS LINE WILL MOVE INTO WESTERN PORTIONS OF JEFFERSON COUNTY IN THE NEXT 10 MINUTES. THE MAIN THREAT FROM THESE STORMS WILL BE WINDS IN EXCESS OF 60 MPH. PERSONS IN THE COMMUNITIES OF NOME...CHINA...HAMSHIRE AND BEAUMONT ARE IN THE PATH OF THESE STORMS. 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 TELEPHONES...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 21, 8:04 PM CST, 3 hours 36 minutes earlier.
Area forecast discussion, Feb 21, 8:04 PM CST, 3 hours 36 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 804 PM CST SAT FEB 21 1998 PREV FCST ON TRACK FOR SRN ZNS. WOULD LIKE A TWEAK DOWNWARD FOR AEX AS TEMPS SHUD DROP LATE TNITE AS LOW PASSES EAST AND CAA BEGINS... AS SEEN ON ETA THCKNS WITH A DOWNWARD TREND. OTHERWISE...ONSHORE FLO SHUD KEEP TEMPS UP FOR SRN ZNS TNITE. 88-D SHOWING XTSV PCPN FM HOU AND LFK AREA WEST INTO HILL COUNTRY. WV LOOP SHOWING TSTMS FIRING OFF FM S CEN TO S TX AHEAD OF A WELL DEFINED TROF WITH STG VORTICITY SHOWING UP IN WELL DEFINED COMMA MOVING INTO E TX. 01Z SFC DATA SHOWS SFC LOW STILL FORMING UP ALG LWR TX CST. ETA TRACK OF SFC LOW RUNS FM NR HOU AT MIDNIGHT TO LCH AT DAYBREAK AND ON TO BTR AT NOON ON SUNDAY. 88-D VAD WINDS AT LCH SHOWING FAVORABLE LOW AND MID LVL SHEAR FOR ROTATING TSTMS. CURRENT TRENDS STILL SHOW EVENTUAL SFC LOW TO BE SOUTH OF ETA/NGM TRACK...OVR NRN GULF AND UPR AIR DYNAMICS NOT SHOWING FAVORABLE JETSTREAKS...HWVR ELEVATED SVR TSTMS PSBL IN STG UVV ARND MIDNIGHT. 11 BPT 53/62/47/71 9300 LCH 54/61/47/70 9400 LFT 54/62/48/71 9600 AEX 46/57/46/70 8300
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 12:31 AM CST | Severe Thunderstorm Warning | LCH | Orange | 59 min |
Nearby
Severe Thunderstorm Warnings in Texas, 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.