Alert archive / Louisiana / Special Weather Statements in 2011

Special Weather Statement, NWS Lake Charles, LA

August 24, 2011Lafayette Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Aug 24, 2011, 7:04 PM CDT for Lafayette Parish, Louisiana. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 24, 2011, 7:04 PM CDT (00:04 UTC)
Expired: Aug 24, 2011, 8:00 PM CDT
In force: 56 min
Issued by: NWS Lake Charles, LA

County Lafayette Parish, LA

The radar

The Lake Charles radar (KLCH), 103 km from the middle of the area, began a volume at 00:05 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 00:00Z, 0.1 hours before the alert went out and 101 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: 3449 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1122 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 36 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 24, 6:48 PM CDT, 16 minutes earlier.

Area forecast discussion, Aug 24, 6:48 PM CDT, 16 minutes before

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Hazardous weather outlook, Aug 24, 4:56 AM CDT, 14 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
456 AM CDT WED AUG 24 2011

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055-
TXZ180-201-215-216-259>262-251000-
SABINE LAKE-CALCASIEU LAKE-VERMILION BAY-
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM-
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM-
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM-
WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM-
WATERS FROM  INTRACOASTAL CITY TO CAMERON LA FROM 20 TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM
20 TO 60 NM-VERNON-RAPIDES-AVOYELLES-BEAUREGARD-ALLEN-EVANGELINE-
ST. LANDRY-CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-
UPPER ST. MARTIN-CAMERON-VERMILION-IBERIA-ST. MARY-
LOWER ST. MARTIN-TYLER-HARDIN-JEFFERSON-ORANGE-NORTHERN JASPER-
NORTHERN NEWTON-SOUTHERN JASPER-SOUTHERN NEWTON-
456 AM CDT WED AUG 24 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO...LA...CENTRAL LOUISIANA...SOUTH CENTRAL
LOUISIANA...SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA...
SOUTHEAST TEXAS AND TX.

.DAY ONE...TODAY AND TONIGHT

HOT AND HUMID CONDITIONS WILL PERSIST. HEAT INDICES OF 103 TO 108
DEGREES WILL BE COMMON INLAND MOVING THROUGH THE AFTERNOON
HOURS...AND GENERALLY FROM 100 TO 105 ACROSS THE NEAR COASTAL
WATERS.

ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP THIS
AFTERNOON. STRONGER THUNDERSTORMS WILL PRODUCE BRIEF HEAVY RAINS
AND WILL HAVE THE POTENTIAL TO PRODUCE GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

HOT AND HUMID CONDITIONS WILL CONTINUE THURSDAY WITH THE
POSSIBILITY OF A FEW THUNDERSTORMS DEVELOPING. RAIN CHANCES WILL
DIMINISH FOR FRIDAY AND THE WEEKEND WITH DRIER AIR WORKING INTO
THE AREA AS A WEAK FRONT ADVANCES THROUGH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE REQUIRED.

In the hours before

Local storm report, Aug 24, 5:02 PM CDT, 2 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
502 PM CDT WED AUG 24 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0457 PM     TSTM WND GST     AMELIA                  29.66N 91.11W
08/24/2011  M49 MPH           ST. MARY           LA   PUBLIC

            WIND MEASURED 30 KNOTS...GUSTING TO 42 KNOTS AT PETROLEUM
            HELICOPTERS INC. HELIPORT IN AMELIA.

&&

JNUNN

Special weather statement, Aug 24, 5:40 PM CDT, 1 hour 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
540 PM CDT WED AUG 24 2011

LAZ027-028-030>033-041>044-TXZ180-201-215-216-259>262-242345-HARDIN
TX-NORTHERN JASPER TX-NORTHERN NEWTON TX-TYLER TX-JEFFERSON TX-ST.
LANDRY LA-RAPIDES LA-LAFAYETTE LA-EVANGELINE LA-BEAUREGARD LA-ALLEN
LA-ACADIA LA-VERNON LA-CALCASIEU LA-ORANGE TX-JEFFERSON DAVIS
LA-SOUTHERN JASPER TX-SOUTHERN NEWTON TX-533 PM CDT WED AUG 24 2011

...SIGNIFICANT WEATHER ADVISORY FOR HARDIN...JASPER...NEWTON...
TYLER...JEFFERSON AND ORANGE COUNTIES...SIGNIFICANT WEATHER ADVISORY
FOR ST. LANDRY...RAPIDES...LAFAYETTE...EVANGELINE...BEAUREGARD...
ALLEN...ACADIA...VERNON...CALCASIEU AND JEFFERSON DAVIS PARISHES
UNTIL 645 PM CDT...

AT 533 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS ACROSS SOUTHERN TYLER...NORTHERN JASPER
AND NEWTON COUNTIES IN SOUTHEAST TEXAS...AND ACROSS CENTRAL AND
NORTHERN BEAUREGARD...ALLEN AND EVANGELINE PARISHES IN WESTERN AND
CENTRAL LOUISIANA. THESE THUNDERSTORMS WILL CONTINUE MOVING SOUTH AT
20 TO 25 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  TROUT CREEK...CALL AND FRED BY 540 PM...
  SAVOY AND WILDWOOD BY 545 PM...
  EUNICE...BANCROFT...REEVES AND LEBLANC BY 550 PM...
  OLD SALEM BY 555 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS TO NEAR 50 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING
UNTIL THESE STORMS HAVE PASSED.

THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A
SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING
ROADWAYS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED
ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING.

LAT...LON 3050 9455 3089 9463 3096 9357 3100 9229
      3014 9227 3005 9241 3011 9257 3005 9270
      3005 9372 3003 9374 3001 9445 3011 9445
      3011 9459 3013 9461 3047 9473 3050 9473

LANDRENEAU

Special weather statement, Aug 24, 5:49 PM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
549 PM CDT WED AUG 24 2011

LAZ027-028-030>033-041>044-TXZ180-201-215-216-259>262-242345-HARDIN
TX-NORTHERN JASPER TX-NORTHERN NEWTON TX-TYLER TX-JEFFERSON TX-ST.
LANDRY LA-RAPIDES LA-LAFAYETTE LA-EVANGELINE LA-BEAUREGARD LA-ALLEN
LA-ACADIA LA-VERNON LA-CALCASIEU LA-ORANGE TX-JEFFERSON DAVIS
LA-SOUTHERN JASPER TX-SOUTHERN NEWTON TX-533 PM CDT WED AUG 24 2011

...SIGNIFICANT WEATHER ADVISORY FOR HARDIN...JASPER...NEWTON...
TYLER...JEFFERSON AND ORANGE COUNTIES...SIGNIFICANT WEATHER ADVISORY
FOR ST. LANDRY...RAPIDES...LAFAYETTE...EVANGELINE...BEAUREGARD...
ALLEN...ACADIA...VERNON...CALCASIEU AND JEFFERSON DAVIS PARISHES
UNTIL 645 PM CDT...

AT 540 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS ACROSS SOUTHERN TYLER...NORTHERN JASPER
AND NEWTON COUNTIES IN SOUTHEAST TEXAS...AND ACROSS CENTRAL AND
NORTHERN BEAUREGARD...ALLEN AND EVANGELINE PARISHES IN WESTERN AND
CENTRAL LOUISIANA. THESE THUNDERSTORMS WILL CONTINUE MOVING SOUTH AT
20 TO 25 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  TROUT CREEK...CALL AND FRED BY 540 PM...
  SAVOY AND WILDWOOD BY 545 PM...
  EUNICE...BANCROFT...REEVES AND LEBLANC BY 550 PM...
  OLD SALEM BY 555 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS TO NEAR 50 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING
UNTIL THESE STORMS HAVE PASSED.

THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A
SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING
ROADWAYS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED
ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING.

LAT...LON 3050 9455 3089 9463 3096 9357 3100 9229
      3014 9227 3005 9241 3011 9257 3005 9270
      3005 9372 3003 9374 3001 9445 3011 9445
      3011 9459 3013 9461 3047 9473 3050 9473

LANDRENEAU

Local storm report, Aug 24, 6:43 PM CDT, 21 minutes before

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Local storm report, Aug 24, 6:50 PM CDT, 14 minutes before

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Special weather statement, Aug 24, 7:04 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 7:00 PM CDT	Special Marine Warning	LCH		90 min
Aug 25, 3:27 AM CDT	Heat Advisory	LCH	Allen, Avoyelles, Beauregard, Evangeline, Lafayette, Rapides and 3 more	12 hr
Aug 25, 12:10 PM CDT	Special Marine Warning	LCH		65 min
Aug 25, 12:47 PM CDT	Special Marine Warning	LCH		58 min
Aug 25, 3:49 PM CDT	Special Marine Warning	LCH		56 min

Nearby

Special Weather Statements in Louisiana, 2011 Every special weather statement in 2011

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.