Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 111, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Sep 20, 2001, 4:08 PM CDT for Vernon Parish, Louisiana. It was in force for 67 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Sep 20, 2001, 4:08 PM CDT (21:08 UTC)
- Expired
- Sep 20, 2001, 5:15 PM CDT
- In force
- 67 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Vernon Parish, LA
The radar
The Ft Polk radar (KPOE), 38 km from the middle of the area, began a volume at 21:08 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 |
|---|---|---|---|
| Sep 20, 5:00 PM CDT | Hail 0.88 | Leesville, LA |
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 12:00Z, 9.1 hours before the alert went out and 115 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
- 3591 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
414 WUUS54 KLCH 202110 SVRLCH LAC115-202215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA ISSUED BY NWS SHREVEPORT LA 408 PM CDT THU SEP 20 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... VERNON PARISH IN WEST CENTRAL LOUISIANA * UNTIL 515 PM CDT * AT 408 PM CDT...THE NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES WEST OF LEESVILLE...MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 2 MILES NORTH OF LEESVILLE...4 MILES NORTH OF NEWLLANO AT 440 PM CDT... NEAR FORT POLK AT 450 PM CDT. THIS THUNDERSTORM WILL PRODUCE LARGE HAIL AND STRONG DAMAGING WINDS. DO NOT REMAIN OUTSIDE. REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING FOR... VERNON PARISH IN WEST CENTRAL LOUISIANA UNTIL 515 PM CDT. LAT...LON 3122 9355 3101 9346 3091 9302 3134 9328
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 Sep 20, 2:20 PM CDT, 1 hour 48 minutes earlier.
Area forecast discussion, Sep 20, 2:20 PM CDT, 1 hour 48 minutes before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 220 PM CDT THU SEP 20 2001 HIGH PRESSURE WILL PREVAIL ACROSS THE FCST AREA FOR THE NEXT FEW DAYS...LIGHT NORTHERLY WINDS WILL CONTINUE TO ADVECT CONTINENTAL AIR. SEE PROBLEMS FOR THE WEEKEND. A DEEP TROUGH IN THE WESTERLIES WILL EJECT SEVERAL SHORT-WAVES ACROSS LOUISIANA. THE ATTENDANT QUASI -GEOSTROPHIC LIFT WILL ENCOURAGE THUNDERSTORMS IN THE DESTABILIZING PRE-FRONTAL AIR. A RATHER ROBUST COLD FRONT WILL SPILL ACROSS THE ENTIRE STATE OF LOUISIANA BY EARLY MONDAY MORNING. CURRENTLY I AM WORKING OFFSITE AT THE HOUSTON FORCAST OFFICE...WHILE THE LAKE CHARLES AWIPS COMPUTER RECEIVES AN UPGRADE. A SPECIAL THANKS TO THE HOUSTON PERSONNEL FOR THEIR GRACIOUS HOSPITALITY. .PRELIMINARY NUMBERS... AEX 72/92/71/89/70/87/66 01114232 BPT 74/91/73/88/72/88/68 01014232 LCH 73/92/73/88/72/88/68 01014232 LFT 72/92/72/90/72/90/68 01012224 .LCH...NONE. TRARES
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 4:56 PM CDT | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 64 min |
| Sep 20, 6:00 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Calcasieu, Jefferson Davis | 60 min |
| Sep 20, 6:00 PM CDT | Severe Thunderstorm Warning | LCH | Allen | 60 min |
| Sep 20, 6:58 PM CDT | Severe Thunderstorm Warning | LCH | Acadia, Jefferson Davis | 62 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2001Every severe thunderstorm warning in 2001
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.