Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 105, NWS Lake Charles, LA

July 6, 2001Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 6, 2001, 6:23 PM CDT for Avoyelles 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: Jul 6, 2001, 6:23 PM CDT (23:23 UTC)
Expired: Jul 6, 2001, 7:30 PM CDT
In force: 67 min
Issued by: NWS Lake Charles, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 92 km from the middle of the area, began a volume at 23:28 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
Jul 6, 6:27 PM CDT	Thunderstorm Wind	Mansura, 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, 11.4 hours before the alert went out and 154 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3141 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

620 
WUUS54 KLCH 062323
SVRLCH
LAC009-070030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
623 PM CDT FRI JUL 6 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AVOYELLES PARISH IN CENTRAL LOUISIANA

* UNTIL 730 PM CDT

* AT 620 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER MOREAUVILLE...MOVING NORTHWEST AT 15 MPH.

* THIS STORM WILL BE NEAR...
  MANSURA BY 630 PM CDT
  HESSMER BY 640 PM CDT
  MARKSVILLE BY 645 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 3091 9199 3107 9185 3131 9205 3113 9221

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 Jul 6, 2:07 PM CDT, 4 hours 16 minutes earlier.

Area forecast discussion, Jul 6, 2:07 PM CDT, 4 hours 16 minutes before

SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
210 PM CDT FRI JUL 7 2001

THE LAKE CHARLES SOUNDING THIS MORNING INDICATED A PRECIP WATER OF
2.09 AND A CAPE OF OVER 4 THOUSAND.  THIS INDICATES TO ME THE HIGH
PRESSURE RIDGE HAS NOT COMPLETELY INFLUENCED THE AREA AT THIS TIME
AND AFTERNOON AND EVENING THUNDERSTORMS WILL PREVAIL THIS EVENING
AND AGAIN ON SATURDAY.  ACCORDING TO THE ETA AND THE NGM THE HIGH
PRESSURE RIDGE WILL FINALLY DOMINATE THE AREA BY LATE SATURDAY AND
SUNDAY CAUSING SHOWERS TO DECREASE.  WITH THE SHOWER ACTIVITY
CONTINUING HIGH TEMPERATURES ON SATURDAY WILL NOT BE AS WARM AND
SHOULD BE BELOW THE HEAT INDEX CRITERIA UNTIL ATLEAST SUNDAY.  WINDS
WILL BASICALLY BE FROM THE WEST TO SOUTHWEST FOR THE NEXT FEW DAYS
WITH LOW PRESSURE TO THE NORTH.  THE BOUNDARY LAYER RELATIVE
HUMIDITIES INDICATE MID TO UPPER LEVEL DRY AIR WILL MOVE INTO THE
AREA BY LATE SATURDAY CAUSING A PRETTY GOOD CAP IN THE MID
LEVELS...THEREFORE WILL DECREASE POPS CONSIDERABLY BY SUNDAY.

MARINE...WINDS AND SEAS REMAIN LOW THROUGHOUT THE PERIOD.  SOME
SCATTERED SHOWERS OR THUNDERSTORMS WILL PERSIST FOR THE NEXT FEW
DAYS.

LONG TERM...HIGH PRESSURE RIDGE AT 500 MB REMAIN OVER NORTH TEXAS
THROUGH ATLEAST NEXT WEEKEND CAUSING MOST OF THE SHOWERS AND
THUNDERSTORMS TO BE SUPPRESSED.  BASICALLY HOT AND DRY WILL BE THE
RULE FOR THE EXTENDED FOREC'AST.

.LCH...LA NONE.
       TX OZONE ACTION DAY...TXZ201-215-216.

.PRELIMINARY NUMBERS...
BPT 76/92/76/93/76 23111
LCH 76/92/76/93/76 23111
LFT 75/91/76/92/76 23211
AEX 74/95/75/96/75 22111

55

In the hours before

Local storm report, Jul 6, 5:43 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
543 PM CDT FRI JUL 6 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0515 PM    GRAND LAKE                LA   1.75 INCH HAIL
07/06/01   CAMERON

JS

Local storm report, Jul 6, 5:45 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
545 PM CDT FRI JUL 6 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....5

0515 PM    GRAND LAKE                LA   1.75 INCH HAIL
07/06/01   CAMERON

JS

Local storm report, Jul 6, 5:48 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
548 PM CDT FRI JUL 6 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0515 PM    GRAND LAKE                LA   1.75 INCH HAIL
07/06/01   CAMERON

0515 PM    GRAND LAKE                LA   WIND DAMAGE
07/06/01   CAMERON                        SEVERAL MOBILE HOMES
                                          DESTROYED BY WIND GUSTS.

JS

Local storm report, Jul 6, 5:59 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
559 PM CDT FRI JUL 6 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0515 PM    GRAND LAKE                LA   1.75 INCH HAIL
07/06/01   CAMERON

0515 PM    GRAND LAKE                LA   WIND DAMAGE
07/06/01   CAMERON                        SEVERAL MOBILE HOMES
                                          DESTROYED BY WIND GUSTS.

0515 PM    10 S LAKE CHARLES         LA   WIND DAMAGE
07/06/01   CALCASIEU                      1/4 MILE NORTH OF THE
                                          CALCASIEU-CAMERON LINE ON
      }                                    GULF HIGHWAY...ROOFING
                                          MATERERIAL BLOWN OFF
                                          SEVERAL BUILDINGS.

JS

Local storm report, Jul 6, 6:07 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
607 PM CDT FRI JUL 6 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0515 PM    GRAND LAKE                LA   1.75 INCH HAIL
07/06/01   CAMERON

0515 PM    GRAND LAKE                LA   WIND DAMAGE
07/06/01   CAMERON                        SEVERAL MOBILE HOMES
                                          DESTROYED BY WIND GUSTS.

0515 PM    10 S LAKE CHARLES         LA   WIND DAMAGE
07/06/01   CALCASIEU                      1/4 MILE NORTH OF THE
                                          CALCASIEU-CAMERON LINE ON
                                          GULF HIGHWAY...ROOFING
                                          MATERIAL BLOWN OFF
                                          SEVERAL BUILDINGS.

JS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 7:31 PM CDT	Severe Thunderstorm Warning	LCH	Allen	29 min
Jul 6, 4:39 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	66 min
Jul 6, 5:16 PM CDT	Severe Thunderstorm Warning	LCH	Rapides	44 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2001 Every 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.