Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 49, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at May 3, 1999, 6:42 AM CDT for Avoyelles Parish, Louisiana. It was in force for 28 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
- May 3, 1999, 6:42 AM CDT (11:42 UTC)
- Expired
- May 3, 1999, 7:10 AM CDT
- In force
- 28 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Avoyelles Parish, LA
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.7 hours before the alert went out and 156 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
- 1395 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- -35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KLCH 031141 RRA SVRLCH LAC009-031215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 642 AM CDT MON MAY 3 1999 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... AVOYELLES PARISH IN EAST CENTRAL LOUISIANA * UNTIL 710 AM CDT * AT 640 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES EAST OF MARKSVILLE OR 2 MILES NORTHWEST OF BORDELONVILLE MOVING EAST AT 25 MPH. * THIS STORM CAN BE EXPECTED NEAR... BORDELONVILLE BY 645 AM CDT 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 May 3, 2:26 AM CDT, 4 hours 16 minutes earlier.
Area forecast discussion, May 3, 2:26 AM CDT, 4 hours 16 minutes before
SOUTHWEST...CENTRAL LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 226 AM CDT MON MAY 3 1999 IR STLT LOOP SHOW DEBRIS CLDS FROM EARLIER TSRA OVER E TX/W LA MOVING ACROSS MS. SFC OBS ACROSS REGION SHOW DEWPOINTS CREEPING UPWARD ACROSS S/S-CNTRL TX WITH VALUES RISING THROUGH THE 60S TO NR 70. DPS OVER FA RANGE FROM MID 50S TO LOWER 60S. LLVL-MID LVL MSTR DEPTH SLOWLY RISING AS PW INCREASED TO 1.10 INCHES FROM 00Z RAOB. MODELS IN GENERAL AGREEMENT WITH MINOR VARIATIONS. ALL MODELS PICK UP ON SLIGHT UVVS OVER FA FROM 12Z-18Z MONDAY. S/WV OVER NE/SD WILL MOVE NE AND DIMINISH AS TRAILING TROF WASHES OUT OVER SE U.S. THROUGH FP...LARGE TROF OVER WSTRN U.S. WILL SHIFT EASTWARD AND MOVE SLOWLY ACROSS THE PLAINS BY WED. IN THE MEANTIME...WEAK VORT MAXES WILL MOVE ACROSS FA BRINGING SLIGHT CHANCES OF RAIN ON MONDAY AND SCT/NUMEROUS TSRA ON TUESDAY. UPPER TROF WILL PROVIDE FOCUS FOR S/WVS TO ROTATE AROUND BASE BRINGING CHANCES FOR RAIN UNTIL THURSDAY. BEST CHANCES FOR RAIN IN FCST PD WILL COME DURING 12Z-18Z TUE AS STRONGER VORT MAX PUSHES ACROSS SE TX AND LA. EXPECT 1000-700 RHS VALUES TO REMAIN NR 70 PERCENT SO WILL KEEP MCLDY SKIES IN FCST. WENT CLOSE TO MOS TEMPS/POPS. 13 LCH ET 081/069 082/068 082 2143 LFT ET 082/068 082/068 081 2143 AEX ET 081/067 081/067 080 2153 BPT ET 082/070 082/069 082 2143
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 5:19 AM CDT | Severe Thunderstorm Warning | LCH | Rapides | 46 min |
| May 3, 5:49 AM CDT | Severe Thunderstorm Warning | LCH | Avoyelles | 51 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1999Every severe thunderstorm warning in 1999
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.