Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 116, NWS Lake Charles, LA

September 21, 2001Vernon Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Sep 21, 2001, 2:09 PM CDT for Vernon Parish, Louisiana. It was in force for 66 min. No storm report in the archive falls 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.

The facts

Issued
Sep 21, 2001, 2:09 PM CDT (19:09 UTC)
Expired
Sep 21, 2001, 3:15 PM CDT
In force
66 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), 15 km from the middle of the area, began a volume at 19:19 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, 7.2 hours before the alert went out and 123 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.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2001-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2390 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2001-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2390 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
749 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

606 
WUUS54 KLCH 211911
SVRLCH
LAC115-212015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
209 PM CDT FRI SEP 21 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VERNON PARISH IN WEST CENTRAL LOUISIANA

* UNTIL 315 PM CDT

* AT 205 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM 9 MILES NORTHEAST OF LEESVILLE MOVING SOUTHEAST
  AT 10 MPH.

* THIS STORM WILL BE NEAR...
  SLAGLE BY 240 PM CDT
  SIMPSON BY 245 PM CDT

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN.

CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE.

LAT...LON 3133 9323 3116 9326 3101 9297 3130 9288

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 21, 10:45 AM CDT, 3 hours 24 minutes earlier.

Area forecast discussion, Sep 21, 10:45 AM CDT, 3 hours 24 minutes before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1045 AM CDT FRI SEP 21 2001

WEAK UPR LVL RDG OVR THE AREA THIS MRNG IS HELPING TO BRING SUNNY
SKIES AND TEMPS IN THE LOWER 80S. STORMS OVR THE CSTL WTRS FM GLS TO
SOUTH OF SABINE PASS. A LN OF SHWRS/TSTMS IS DVLPG OVR NE TX AND NW
LA THIS AM...THESE STORMS ARE MOVG TO THE EAST.

AT THIS TIME IT LOOKS TO BE A RATHER BUSY DAY LATER THIS AFTERNOON
AS UPR LVL SUPPORT AND DAYTIME HEATING HELP TO TRIGGER ANOTHER ROUND
OF SHWRS/TSTMS. UPR LVL SUPPORT THOUGH DOES NOT APPEAR STRONG ENOUGH
TO HAVE MORE THAN A FEW STORMS PSBLY BECMG SVR...MAIN THREAT WILL BE
DAMAGING WINDS. WILL UPDATE ZONES TO REFLECT INCR IN POPS.

.PRELIM NUMBERS...
AEX 92/68/90/69/88/66 623244
BPT 91/73/90/73/89/70 634344
LCH 91/72/90/72/89/70 634344
LFT 92/71/90/72/89/72 523244

.LCH...NONE.

K. KUYPER

In the hours before

Special weather statement, Sep 21, 10:50 AM CDT, 3 hours 19 minutes before
LAZ027-030-041-051-TXZ181-182-215-216-220200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1050 AM CDT FRI SEP 21 2001

...TOLEDO BEND TO CONTINUE RELEASING WATER FOR NECESSARY REPAIRS...

DUE TO NECESSARY REPAIRS ON TOLEDO BEND DAM...PROLONGED RELEASES
TO DRAW THE LAKE DOWN TO 163 FEET WILL KEEP THE SABINE RIVER AT
DEWEYVILLE JUST BELOW FLOOD STAGE FOR THE NEXT SEVERAL DAYS. THE
STAGE AT DEWEYVILLE WAS 23.1 FEET AT 8 AM FRIDAY MORNING. THE
RIVER WILL FALL SLIGHTLY THROUGH SATURDAY...BUT WILL BEGIN TO
RISE EARLY SUNDAY...LEVELING OFF AROUND 23.9 BY TUESDAY.

STAY TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS ON THIS
SITUATION.

24
Special weather statement, Sep 21, 1:19 PM CDT, 50 minutes before
LAZ027>033-041>045-051>055-TXZ180>182-201-215-216-212100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
119 PM CDT FRI SEP 21 2001

...A FEW SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON...

LOCALIZED WIND GUSTS CAPABLE OF KNOCKING DOWN TREE LIMBS AND POWER
LINES...ALONG WITH LOCALIZED RAINFALL RATES OF 2 TO 3 INCHES AN HOUR
WILL BE POSSIBLE WITH A FEW OF THE THUNDERSTORMS THAT DEVELOP THIS
AFTERNOON.

THE GREATEST RISK FOR THESE THUNDERSTORMS WILL BE WEST AND SOUTH OF A
FORT POLK TO LAFAYETTE LOUISIANA LINE.

A MOIST...UNSTABLE AIRMASS AND DAYTIME HEATING WILL COMBINE TO
PRODUCE THE POSSIBILITY OF A FEW SEVERE THUNDERSTORMS.

INTERESTS SHOULD STAY TUNED TO THE LATEST WEATHER INFORMATION FROM
NOAA WEATHER RADIO OR THE LOCAL MEDIA TODAY.

22

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 21, 2:53 PM CDTSevere Thunderstorm WarningLCHSt. Mary22 min
Sep 21, 3:13 PM CDTSevere Thunderstorm WarningLCHRapides62 min
Sep 21, 4:54 PM CDTSevere Thunderstorm WarningLCHIberia66 min
Sep 21, 4:57 PM CDTSevere Thunderstorm WarningLCHAvoyelles63 min
Sep 21, 5:15 PM CDTSevere Thunderstorm WarningLCHSaint Landry60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.