Alert archive / Louisiana / Special Weather Statements in 2011

Special Weather Statement, NWS Lake Charles, LA

March 30, 2011Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 30, 2011, 5:44 AM CDT for Vermilion Parish, Louisiana. It was in force for 46 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: Mar 30, 2011, 5:44 AM CDT (10:44 UTC)
Expired: Mar 30, 2011, 6:30 AM CDT
In force: 46 min
Issued by: NWS Lake Charles, LA

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 94 km from the middle of the area, began a volume at 10:44 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, 10.7 hours before the alert went out and 92 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: 2534 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 648 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 14.0

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 Mar 30, 4:47 AM CDT, 57 minutes earlier.

Area forecast discussion, Mar 30, 4:47 AM CDT, 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
447 AM CDT WED MAR 30 2011

.DISCUSSION...
EARLY MORNING SFC ANALYSIS SHOWS THE COLD FRONT EXTENDING FROM
NERN MS TO SERN LA TO THE LOWER TX COAST. WATER VAPOR IMAGERY
SHOWS A STRONG SHORTWAVE TROF CROSSING THE LONE STAR STATE WHICH
HAS HELPED PRODUCE ANOTHER ROUND OF WIDESPREAD SHOWERS AND
ELEVATED THUNDERSTORMS ACROSS THE FORECAST AREA OVER THE PAST HOUR
OR TWO. AS THE COLD POOL ALOFT INCHES CLOSER TO THE FORECAST
AREA...EXPECT SOME OF THESE STORMS TO PRODUCE LARGE HAIL AS THEY
PUSH EWD. SEVERE THUNDERSTORM WATCH WHICH WAS IN EFFECT UNTIL
09Z/04CDT HAS EXPIRED WITH THE FRONTAL PASSAGE ACROSS THE
AREA...BUT AS THE RADAR IS SHOWING STRONG TO SEVERE STORMS ARE
STILL POSSIBLE OVER THE NEXT FEW HOURS UNTIL THE DRIER AIR ALOFT
BUILDS OVER THE FORECAST AREA AND SHUTS OFF THE BULK OF THE
PRECIPITATION LATER THIS MORNING.

WILL ISSUE UPDATED AFD AS WEATHER/TIME PERMITS LATER TO ADDRESS
REMAINDER OF THIS FORECAST PACKAGE.

&&

.MARINE...
SCA HAS BEEN ISSUED FOR THE OFFSHORE WATERS WEST OF INTRACOASTAL
CITY AS WINDS ARE FORECAST TO INCREASE TO 20 KNOTS WITH FROPA.
STRONG OFFSHORE FLOW WILL BE SHORT-LIVED AS CONDITIONS SHOULD
IMPROVE BY NOON AS THE FRONT AND ITS ASSOCIATED SFC LOW MOVE
FARTHER EAST AWAY FROM THE AREA.

&&

.PRELIMINARY POINT TEMPS/POPS...
KLCH  68  49  73  52  78 /  30  20  10  10  10
KBPT  67  49  73  57  78 /  30  20  10  10  10
KAEX  66  46  71  50  80 /  20  20  10  10  10
KLFT  70  49  72  54  77 /  40  20  10  10  10

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
TX...NONE.
GM...SMALL CRAFT ADVISORY UNTIL NOON CDT TODAY FOR THE FOLLOWING
     ZONES: WATERS FROM CAMERON, LA TO HIGH ISLAND, TX EXTENDING
     FROM 20 NM TO 60 NM...WATERS FROM INTRACOASTAL CITY, LA TO
     CAMERON, LA EXTENDING FROM 20 NM TO 60 NM.

     SMALL CRAFT EXERCISE CAUTION FROM NOON TODAY TO 3 PM CDT THIS
     AFTERNOON FOR THE FOLLOWING ZONES: COASTAL WATERS FROM
     CAMERON, LA TO HIGH ISLAND, TX OUT 20 NM...COASTAL WATERS
     FROM INTRACOASTAL CITY TO CAMERON, LA OUT 20 NM...WATERS
     FROM CAMERON, LA TO HIGH ISLAND, TX EXTENDING FROM 20 NM TO
     60 NM...WATERS FROM INTRACOASTAL CITY, LA TO CAMERON, LA
     EXTENDING FROM 20 NM TO 60 NM.

&&

25

Hazardous weather outlook, Mar 30, 5:38 AM CDT, 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
538 AM CDT WED MAR 30 2011

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055-
TXZ180>182-201-215-216-311045-
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 EXTENDING FROM 20 NM
TO 60 NM-
WATERS FROM INTRACOASTAL CITY, LA TO CAMERON, LA EXTENDING FROM
20 NM TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY, LA
EXTENDING FROM 20 NM 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-JASPER-NEWTON-HARDIN-JEFFERSON-ORANGE-
538 AM CDT WED MAR 30 2011

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

.DAY ONE...TODAY AND TONIGHT
WIDELY SCATTERED SHOWERS ALONG WITH A THUNDERSTORM OR TWO WILL
LINGER THROUGH THIS MORNING AS A STRONG DISTURBANCE ALOFT PASSES
THE AREA. A SHOWER OR TWO WILL THEN BE POSSIBLE NEAR THE COAST
THIS AFTERNOON AS A COLD FRONT...WHICH PASSED THE AREA TUESDAY
NIGHT...LINGERS OVER THE COASTAL WATERS.

A SMALL CRAFT ADVISORY IS IN EFFECT THROUGH NOON TODAY FOR THE
WATERS BEYOND 20 NAUTICAL MILES AND WEST OF INTRACOASTAL CITY AS
STRONG NORTHERLY WINDS DEVELOP BEHIND THE FRONT. WINDS WILL
DIMINISH BY THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A FEW SHOWERS WILL BE POSSIBLE ACROSS THE ENTIRE AREA TONIGHT AS
THE MAIN TROUGH OF LOW PRESSURE ALOFT PASSES THE REGION. DRY
WEATHER WILL THEN BE ON TAP THROUGH THE REMAINDER OF THE WORK WEEK
AS HIGH PRESSURE BUILDS OVER. THE NEXT SIGNIFICANT CHANCE OF RAIN
WILL BE LATE MONDAY AND MONDAY NIGHT AS ANOTHER STRONG COLD FRONT
SWEEPS ACROSS THE REGION.

.SPOTTER INFORMATION STATEMENT...
STORM SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

25

In the hours before

Local storm report, Mar 30, 5:22 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
522 AM CDT WED MAR 30 2011

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

0522 AM     HAIL             SCOTT                   30.24N 92.09W
03/30/2011  E0.25 INCH       LAFAYETTE          LA   PUBLIC

&&

JBRAZZEL

Local storm report, Mar 30, 5:28 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
528 AM CDT WED MAR 30 2011

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

0507 AM     TSTM WND GST     5 SW LAKE CHARLES       30.16N 93.26W
03/30/2011  M95 MPH          CALCASIEU          LA   SHIP

            HARBOR TUG ENERGY HERCULES REPORT FROM TRUNKLINE LNG.

&&

MOGGED

Local storm report, Mar 30, 5:29 AM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
529 AM CDT WED MAR 30 2011

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

0507 AM     HAIL             5 SW LAKE CHARLES       30.16N 93.26W
03/30/2011  M1.75 INCH       CALCASIEU          LA   SHIP

            HARBOR TUG ENERGY HERCULES REPORT FROM TRUNKLINE LNG.

&&

MOGGED

Local storm report, Mar 30, 5:41 AM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
541 AM CDT WED MAR 30 2011

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

0535 AM     HAIL             GRAND COTEAU            30.42N 92.05W
03/30/2011  E0.50 INCH       ST. LANDRY         LA   PUBLIC

&&

MOGGED

Local storm report, Mar 30, 5:42 AM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
542 AM CDT WED MAR 30 2011

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

0530 AM     HAIL             1 NNE CARENCRO          30.32N 92.03W
03/30/2011  E0.75 INCH       LAFAYETTE          LA   PUBLIC

&&

MOGGED

Special weather statement, Mar 30, 5:44 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
544 AM CDT WED MAR 30 2011

LAZ042>045-051>053-301130-
UPPER ST. MARTIN LA-CAMERON LA-LAFAYETTE LA-VERMILION LA-ACADIA LA-
JEFFERSON DAVIS LA-IBERIA LA-
544 AM CDT WED MAR 30 2011

...SIGNIFICANT WEATHER ADVISORY FOR CAMERON...LAFAYETTE...
VERMILION...ACADIA...JEFFERSON DAVIS...IBERIA AND ST. MARTIN PARISHES
UNTIL 630 AM CDT...

AT 538 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES WEST OF LAKE ARTHUR...MOVING EAST AT 45
MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  GUEYDAN...RICEVILLE AND MORSE BY 555 AM...
  WRIGHT BY 600 AM...
  LYONS POINT BY 605 AM...
  KAPLAN BY 610 AM...
  INDIAN BAYOU BY 615 AM...
  MEAUX BY 620 AM...

THE PRIMARY THREATS FROM THIS STORM ARE PEA TO NICKEL SIZE HAIL AND
WIND GUSTS TO NEAR 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW
AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR
BUILDING UNTIL THIS STORM HAS PASSED.

LAT...LON 3013 9190 2989 9193 2998 9275 3016 9274

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 9:05 PM CDT	Special Weather Statement	LCH	Beauregard	55 min
Mar 29, 9:09 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	66 min
Mar 29, 9:42 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis	63 min
Mar 29, 9:47 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	43 min
Mar 29, 9:51 PM CDT	Special Weather Statement	LCH	Vermilion	39 min
Mar 29, 9:53 PM CDT	Special Marine Warning	LCH		52 min
Mar 29, 10:11 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Saint Landry	49 min
Mar 29, 10:16 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	44 min
Mar 29, 10:18 PM CDT	Special Weather Statement	LCH	St. Mary	42 min
Mar 29, 10:24 PM CDT	Areal Flood Advisory	LCH	Calcasieu	81 min
Mar 29, 10:59 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	46 min
Mar 29, 11:03 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Evangeline, Jefferson Davis, Saint Landry	24 min
Mar 29, 11:20 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Evangeline, Saint Landry	40 min
Mar 30, 12:01 AM CDT	Special Weather Statement	LCH	Calcasieu	44 min
Mar 30, 12:34 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis	29 min
Mar 30, 2:45 AM CDT	Special Marine Warning	LCH		60 min
Mar 30, 3:09 AM CDT	Special Weather Statement	LCH	Avoyelles	51 min
Mar 30, 3:15 AM CDT	Special Marine Warning	LCH		60 min
Mar 30, 3:40 AM CDT	Special Weather Statement	LCH	Beauregard	50 min
Mar 30, 3:43 AM CDT	Special Marine Warning	LCH		62 min
Mar 30, 3:51 AM CDT	Special Marine Warning	LCH		39 min
Mar 30, 4:25 AM CDT	Small Craft Advisory	LCH		8 hr
Mar 30, 4:30 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard	23 min
Mar 30, 4:34 AM CDT	Special Marine Warning	LCH		56 min
Mar 30, 4:38 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	52 min
Mar 30, 4:43 AM CDT	Special Weather Statement	LCH	Lafayette	47 min
Mar 30, 4:46 AM CDT	Special Marine Warning	LCH		59 min
Mar 30, 4:51 AM CDT	Special Weather Statement	LCH	Allen, Evangeline	39 min
Mar 30, 4:55 AM CDT	Special Weather Statement	LCH	Assumption	50 min
Mar 30, 5:09 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	37 min
Mar 30, 5:16 AM CDT	Special Weather Statement	LCH	Lafayette	44 min
Mar 30, 5:27 AM CDT	Severe Thunderstorm Warning	LCH	Lafayette, Saint Landry, Saint Martin	31 min
Mar 30, 5:34 AM CDT	Special Marine Warning	LCH		56 min
Mar 30, 5:37 AM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	22 min
Mar 30, 6:01 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Iberia, Lafayette, Saint Martin, Vermilion	30 min
Mar 30, 6:31 AM CDT	Special Weather Statement	LCH	Lafayette, Saint Martin	44 min
Mar 29, 9:36 PM CDT	Special Weather Statement	LCH	Jefferson	54 min
Mar 29, 10:12 PM CDT	Severe Thunderstorm Warning	LCH	Jefferson, Orange	48 min
Mar 30, 2:28 AM CDT	Special Weather Statement	LCH	Jasper, Newton	47 min
Mar 30, 3:30 AM CDT	Special Weather Statement	LCH	Hardin	45 min
Mar 30, 3:36 AM CDT	Severe Thunderstorm Warning	LCH	Hardin, Jasper, Jefferson, Orange	39 min
Mar 30, 4:08 AM CDT	Special Weather Statement	LCH	Orange	52 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.