Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 2, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Jan 7, 1999, 3:23 PM CST for Vernon Parish, Louisiana. It was in force for 47 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
- Jan 7, 1999, 3:23 PM CST (21:23 UTC)
- Expired
- Jan 7, 1999, 4:10 PM CST
- In force
- 47 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Vernon Parish, LA
The radar
The Ft Polk radar (KPOE), 20 km from the middle of the area, began a volume at 21:24 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, 9.4 hours before the alert went out and 110 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
- 45 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 497 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KLCH 072125 RRA SVRLCH LAC115-072210- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 323 PM CST THU JAN 7 1999 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... VERNON PARISH IN SOUTHWESTERN LOUISIANA * UNTIL 410 PM CST * AT 321 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES NORTHEAST OF LEESVILLE OR 3 MILES NORTH OF SLAGLE MOVING NORTHEAST AT 25 MPH. * THIS STORM WILL REACH SIMPSON IN NORTHEAST VERNON PARISH BY 345 PM. 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 Jan 7, 2:20 PM CST, 1 hour 3 minutes earlier.
Area forecast discussion, Jan 7, 2:20 PM CST, 1 hour 3 minutes before
SOUTHWEST...CENTRAL LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 220 PM CST THU JAN 7 1999 *** CORRECTED CCF FCST CODES *** LATEST SFC MAP SHOWS STATIONARY FRONT IN NORTHERN LA WITH HEAVY TO RAINFALL MOVING ACROSS CENTRAL AND SOUTH-CENTRAL LA. AREAS IN SW AND SOUTH-CENTRAL LA HAVE REPORTED OVER 6 INCHES OF RAIN SINCE LAST NIGHT. SHORT TERM...CONCERNS ARE HEAVY PCPN/FLOODING IN CENTRAL AND NORTH FA AND CONVECTION SOUTHWEST FA. HAVE ISSUED FFW TO ENCOMPASS SW/S-CENTRAL LA THROUGH TNGT. RECOMMEND FFA BE EXTENDED THROUGH TNGT. SW LA HAS BROKEN OUT WITH LCH SCT100 AT 19Z. TEMPS HAVE CLIMBED TO NEAR 70 IN SW LA/SE TX. MODIFIED 12Z LCH SOUNDING (WITH 72/66) GENERATES CAPES OF 1500-2000 J/KG WHICH CORRELATES WELL WITH THE FCST CAPES FROM THE 12Z ETA RUN. S-R HELICITY WAS 225 M2/S2 FROM THE 12Z RUN. ETA DEPICTS A WEAK SHORTWAVE MOVING ALONG NORTHERN FA BOUNDARY THIS EVENING. THIS WILL IMPROVE THE SHEAR PROFILE SOMEWHAT...WITH MODEL SR HELICITIES OF 300-400 M2/S2. SPC 94O UPDATE PUTS THE NORTHERN FA IN A SLIGHT RISK OF SEVERE. WITH THE SFC HEATING TAKING PLACE IN SW LA...THINK THREAT INCLUDES ALL OF FA WITH NORTHERN FA WITH GREATEST THREAT OF ROTATING STORMS AS BEST SHEARING WILL BE IN PROXIMITY TO S/W. ALSO...MODELS DEPICT 850-300MB THICKNESS DIFLUENCE TNGT INTO FRI AM WITH ETA BEING THE MOST AGGRESSIVE. COULD BE SIMILAR PATTERN TO LAST NIGHT WITH RESPECT TO TRAINING. WILL GO WITH HIGHER FAN POPS... USING 50 FOR LCH/LFT/BPT AND 60 FOR AEX. FOR QPF...WILL REDUCE ETA VALUES A BIT TAKING INTO ACCT BASIN AVERAGING. FOR TEMPS...WITH CLDS/PCPN AND WARMER THAN FCST PM TEMPS TDA...WILL SO SLIGHTLY ABOVE GUIDANCE NUMBERS. FRI/FRI NIGHT...COLD FRONT WILL ENTER NORTHERN LA FRI EVE. MODELS SIMILAR WITH FROPA 06-09Z SAT NORTH/WEST AND AROUND 12Z EAST. FRONTAL DYNAMICS WILL BE MOST FAVORABLE NORTH OF FA...BUT WITH SIGNIFICANT INSTABILITY PRESENT THRU FRI EVE WITH LIS OF -4 AND CAPES OF 1500 J/KG...GOOD CHANCE OF SHWRS/TSTMS. SPC INDICATES SLIGHT RISK...AGAIN BEST CHANCE NORTH FA WHERE BEST U/A DYNAMICS EXIST. FOR 2ND PERIOD... WILL GO WITH 40 POPS FOR SOUTH AND 50 IN NORTH. FOR 2ND PERIOD TEMPS...NEAR 70 IN SOUTH WITH UPPER 60S NORTH. FOR 3RD PERIOD...WILL INCREASE PCPN COVERAGE SLIGHTLY DUE TO PROXIMITY OF FRONT AND GO WITH 60 POP IN NORTH AND 50 POP IN SOUTH. FOR 3RD PERIOD TEMPS...WILL GO WITH SLIGHTLY WARMER FAN GUIDANCE. SATURDAY...FRONT SHOULD MOVE EAST OF FA BY 12Z. SOME MOISTURE MAY LINGER BEHIND FRONT...WILL GO WITH ISOLATED POPS IN THE SOUTH/EAST PORTIONS. TAKING CLDS/CAA INTO ACCT...MAY ONLY RISE 3-5 DEGREES FROM 12Z TEMPS...WILL GO WITH LOW 50S IN SOUTH AND NEAR 50 IN THE NORTH. FOR SAT NIGHT...TEMPS WILL REACH FREEZING LEVELS NORTHERN HALF OF FA. EXTENDED...ECMWF DEPICTS A DECENT TROF IN THE CENTRAL US BY 12Z TUE WHILE UKMET AND MRF HAVE FLAT FLOW FOR REGION WITH LOW POPS. ATTM... BELIEVE THE LATTER SOLUTION. 18 LCH WE 062/070 050/054 033 545 LFT WE 061/070 055/057 034 545 AEX WE 059/068 045/050 029 656 BPT WE 063/071 049/053 034 545
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 7, 8:03 AM CST | Flash Flood Warning | LCH | Acadia | 3 hr |
| Jan 7, 10:20 AM CST | Flash Flood Warning | LCH | Evangeline, Saint Landry | 3 hr |
| Jan 7, 10:20 AM CST | Flash Flood Warning | LCH | Lafayette, Saint Martin | 3 hr |
| Jan 7, 11:04 AM CST | Flash Flood Warning | LCH | Acadia, Jefferson Davis | 2 hr |
| Jan 7, 1:30 PM CST | Flash Flood Warning | LCH | Acadia, Evangeline, Jefferson Davis | 3 hr |
| Jan 7, 1:30 PM CST | Flash Flood Warning | LCH | Lafayette, Saint Landry, Saint Martin | 3 hr |
| Jan 7, 4:23 PM CST | Tornado Warning | LCH | Rapides, Vernon | 32 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; radar from the NEXRAD Level II archive.