Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Lake Charles, LA

April 4, 2012St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 4, 2012, 5:00 AM CDT for St. Mary Parish, Louisiana. It was in force for 60 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: Apr 4, 2012, 5:00 AM CDT (10:00 UTC)
Expired: Apr 4, 2012, 6:00 AM CDT
In force: 60 min
Issued by: NWS Lake Charles, LA

County St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.0 hours before the alert went out and 179 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: 3354 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.3

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 Apr 4, 4:53 AM CDT, 7 minutes earlier.

Area forecast discussion, Apr 4, 4:53 AM CDT, 7 minutes before

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Hazardous weather outlook, Apr 4, 4:58 AM CDT, 2 minutes before

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In the hours before

Local storm report, Apr 4, 3:50 AM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
350 AM CDT WED APR 04 2012

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

0348 AM     HAIL             MAURICE                 30.11N 92.12W
04/04/2012  E0.75 INCH       VERMILION          LA   LAW ENFORCEMENT

            VERMILLION SHERIFFS OFFICE REPORTS PENNY SIZE HAIL NEAR
            MAURICE.

&&

DJONES

Local storm report, Apr 4, 3:56 AM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
356 AM CDT WED APR 04 2012

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

0355 AM     HAIL             LAFAYETTE               30.22N 92.03W
04/04/2012  E0.50 INCH       LAFAYETTE          LA   PUBLIC

            PUBLIC REPORTS VIA FACEBOOK DIME SIZE HAIL NEAR LAFAYETTE

&&

DJONES

Special weather statement, Apr 4, 3:56 AM CDT, 1 hour 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
356 AM CDT WED APR 4 2012

LAZ041>045-052>055-073-074-041000-
LAFAYETTE LA-ACADIA LA-CALCASIEU LA-JEFFERSON DAVIS LA-
UPPER ST. MARTIN LA-LOWER ST. MARTIN LA-VERMILION LA-IBERIA LA-
ST. MARY LA-WEST CAMERON LA-EAST CAMERON LA-
356 AM CDT WED APR 4 2012

...SIGNIFICANT WEATHER ADVISORY FOR LAFAYETTE...ACADIA...CALCASIEU...
JEFFERSON DAVIS...VERMILION...ST. MARY...IBERIA...ST. MARTIN AND
CAMERON PARISHES UNTIL 500 AM CDT...

AT 352 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM 11 MILES
NORTHEAST OF SABINE NATIONAL WILDLIFE TO ABBEVILLE TO 12 MILES EAST
OF CATAHOULA...MOVING SOUTH AT 15 MPH.

THE LINE OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...
YOUNGSVILLE...LAKE ARTHUR...RICEVILLE...CATAHOULA...THORNWELL AND
MILTON.

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO
NICKEL SIZE HAIL...AND WIND GUSTS 35 TO 45 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CDT
WEDNESDAY MORNING FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

LAT...LON 2981 9177 2982 9197 2979 9198 2974 9215
      2985 9325 3005 9330 2986 9334 2988 9355
      3030 9342 3027 9214 3037 9164 3025 9158
      3023 9147 2995 9146

25

Local storm report, Apr 4, 3:59 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
359 AM CDT WED APR 04 2012

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

0347 AM     HAIL             PARKS                   30.22N 91.83W
04/04/2012  E1.00 INCH       ST. MARTIN         LA   PUBLIC

            PUBLIC REPORTS VIA FACEBOOK QUARTER SIZE HAIL NEAR PARKS

&&

DJONES

Special weather statement, Apr 4, 4:54 AM CDT, 6 minutes before

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Special weather statement, Apr 4, 5:00 AM 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
Apr 3, 8:35 PM CDT	Special Weather Statement	LCH	Avoyelles	55 min
Apr 3, 8:59 PM CDT	Special Weather Statement	LCH	Rapides	61 min
Apr 3, 11:14 PM CDT	Special Weather Statement	LCH	Rapides, Vernon	2 hr
Apr 3, 11:22 PM CDT	Special Weather Statement	LCH	Rapides, Vernon	113 min
Apr 4, 12:45 AM CDT	Tornado Warning	LCH	Beauregard, Vernon	30 min
Apr 4, 2:14 AM CDT	Special Weather Statement	LCH	Acadia, Calcasieu, Jefferson Davis, Saint Landry	31 min
Apr 4, 2:56 AM CDT	Special Weather Statement	LCH	Acadia, Allen, Beauregard, Calcasieu, Jefferson Davis, Lafayette and 2 more	64 min
Apr 4, 3:44 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin, Vermilion	29 min
Apr 4, 3:56 AM CDT	Special Weather Statement	LCH	Calcasieu, Cameron, Jefferson Davis, Lafayette, Saint Martin, Vermilion	64 min
Apr 4, 4:19 AM CDT	Severe Thunderstorm Warning	LCH	Iberia, Vermilion	26 min
Apr 4, 4:54 AM CDT	Special Weather Statement	LCH	Iberia	51 min
Apr 4, 8:31 AM CDT	Special Marine Warning	LCH		59 min
Apr 4, 9:28 AM CDT	Special Marine Warning	LCH		62 min
Apr 4, 6:59 PM CDT	Special Marine Warning	LCH		91 min

Nearby

Special Weather Statements in Louisiana, 2012 Every special weather statement in 2012

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.