Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 149, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 30, 1998, 4:39 PM CDT for Calcasieu Parish, Louisiana. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 30, 1998, 4:39 PM CDT (21:39 UTC)
- Expired
- Aug 30, 1998, 5:40 PM CDT
- In force
- 61 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Calcasieu Parish, LA
The radar
The Lake Charles radar (KLCH), 18 km from the middle of the area, began a volume at 21:42 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.7 hours before the alert went out and 19 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
- 2927 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
640 WUUS1 KLCH 302140 RRA SVRLCH LAC019-302240- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 439 PM CDT SUN AUG 30 1998 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALCASIEU PARISH IN SOUTHWESTERN LOUISIANA * UNTIL 540 PM CDT * AT 434 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 23 MILES NORTHWEST OF LAKE CHARLES OR 3 MILES NORTH OF DEQUINCY MOVING SOUTH AT 5 MPH. * THIS STORM CAN BE EXPECTED NEAR... DEQUINCY BY 510 PM...SULPHUR BY 530 PM. THIS IS A VERY DANGEROUS STORM. FOR YOUR PROTECTION...SEEK SHELTER IN A STRONG BUILDING. MOVE TO AN INTERIOR ROOM...SUCH AS A CLOSET OR BATHROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. DO NOT STAND BY WINDOWS.
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 Aug 30, 2:53 PM CDT, 1 hour 46 minutes earlier.
Area forecast discussion, Aug 30, 2:53 PM CDT, 1 hour 46 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 253 PM CDT SUN AUG 30 1998 OUTFLOW BOUNDARY FROM THIS MORNINGs MCS NORTH OF THE LCH CWA FIRED UP A LINE OF THUNDERSTORMS ACROSS EAST CENTRAL LA LATE THIS MORNING. DOPPLER RADAR ESTIMATED BETWEEN 2 TO 4 INCHES OF RAINFALL IN WESTERN ST LANDRY PARISH IN LESS THAN AN HOUR...THUS JUSTIFYING THE FFW. SURFACE TROUGH EXTENDING ACROSS EAST TEXAS AND CENTRAL LA BECOMING REAL DIFFUSE AND IS EXPECTED TO WASH OUT IN THE NEXT 24H. STILL THOUGH...EXPECT SCATTERED WIDELY SCATTERED ACTIVITY FOR THE REMAINDER OF THE AFTERNOON IN THE VICINITY OF THE SURFACE TROUGH AND SHEAR AXIS AT 50H. MAIN FORECAST PROBLEM WILL BE EXPECTED DEVELOPMENT OF TROPICAL LOW IN THE SOUTHWEST GULF OF MEXICO. ALL THREE MODELS...AVN...ETA AND NGM DEVELOP THE LOW BY MONDAY MORNING. THE ETA IS THE QUICKEST AND THE AVN A CLOSE SECOND. THE NGM IS CONSIDERABLY SLOWER AND WEAKER WITH ITS SOLUTION. PREFER THE SLOWER NGM AT THIS TIME BASED ON CLIMATOLOGY AND THE FACT THAT DEVELOPMENT HAS YET TO OCCUR. IN ADDITION...STEERING WINDS LIKELY TO BE LIGHT. WINDS WILL GRADUALLY STRENGTHEN THROUGH THE PERIOD FROM THE EAST. THIS TRAJECTORY CONDUCIVE FOR COASTAL FLOODING (EKMAN EFFECT) PENDING DEVELOPMENT OF THE LOW. IN THE MEANTIME...WILL GO WITH LOW CHANCE POPS DURING THE SECOND AND FOURTH PERIODS WITH ISOLATED EARLY EVENING ACTIVITY. CONVECTIVE DEBRIS FROM ACTIVITY ALONG THE WESTERN GULF OF MEXICO WILL KEEP CLOUD COVER OVER THE FORECAST AREA THIS EVENING. THIS WILL HOLD TEMPS UP A BIT THIS EVENING AS COMPARED TO THE LOWER OUTPUT FROM MOS. WILL USE A COMPROMISE OF THE AVN AND NGM MOS FOR THE REMAINING PERIODS. A LOT OF VARIABLES IN THIS FORECAST PACKAGE WITH THE POTENTIAL FOR BIG CHANGES IN RELATIVELY SHORT AMOUNT OF TIME. WILL NEED TO CLOSELY MONITOR THE SITUATION. 5 BPT 78/93/74/91 1213 LCH 78/93/74/91 1213 LFT 77/93/74/93 1213 AEX 75/95/71/9`3 2322
In the hours before
Local storm report, Aug 30, 11:59 AM CDT, 4 hours 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1159 AM CDT SUN AUG 30 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0800 PM GIST TX WIND DAMAGE
08/29/98 JASPER HIGH WINDS BLEW DOWN TREES,
PHONE LINES, AND POWER LINES
IN GIST. A TREE FELL INTO A
HOUSE. POWER AND PHONE
SERVICE WAS RESTORED BY 630
THIS MORNING.Local storm report, Aug 30, 2:56 PM CDT, 1 hour 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
256 PM CDT SUN AUG 30 1998
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0250 PM 5 W WOODVILLE TX 0.50 INCH HAIL
08/30/98 TYLER MARBLE SIZED HAIL REPORTED
BY KFDM CH 6 METEOROLOGIST
ALONG HIGHWAY 190 WEST OF
WOODVILLE.The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 11:51 AM CDT | Flash Flood Warning | LCH | Saint Landry | 114 min |
| Aug 30, 3:22 PM CDT | Severe Thunderstorm Warning | LCH | Avoyelles, Rapides | 63 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.