Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 48, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at May 3, 1999, 5:49 AM CDT for Avoyelles Parish, Louisiana. It was in force for 51 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, 5:49 AM CDT (10:49 UTC)
- Expired
- May 3, 1999, 6:40 AM CDT
- In force
- 51 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, 10.8 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 3 hours 23 minutes earlier.
Area forecast discussion, May 3, 2:26 AM CDT, 3 hours 23 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, 6:42 AM CDT | Severe Thunderstorm Warning | LCH | Avoyelles | 28 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.