Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Lake Charles, LA

April 3, 2012Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 3, 2012, 8:35 PM CDT for Avoyelles Parish, Louisiana. It was in force for 55 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 3, 2012, 8:35 PM CDT (01:35 UTC)
Expired: Apr 3, 2012, 9:30 PM CDT
In force: 55 min
Issued by: NWS Lake Charles, LA

County Avoyelles Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.6 hours before the alert went out and 172 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 3, 7:00 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Apr 3, 7:00 PM CDT, 1 hour 35 minutes before

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Hazardous weather outlook, Apr 3, 6:10 AM CDT, 14 hours 25 minutes before

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In the hours before

Local storm report, Apr 3, 4:28 PM CDT, 4 hours 7 minutes before

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Local storm report, Apr 3, 4:38 PM CDT, 3 hours 57 minutes before

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Special weather statement, Apr 3, 8:35 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
835 PM CDT TUE APR 3 2012

LAZ029-040230-
AVOYELLES LA-
835 PM CDT TUE APR 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR AVOYELLES PARISH UNTIL 930 PM
CDT...

AT 830 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF STRONG THUNDERSTORMS 3 MILES NORTHEAST OF DUPONT...MOVING
NORTH AT 20 MPH. THESE STORMS ARE EXPECTED TO MERGE WITH AN OUTFLOW
BOUNDARY AND THUNDERSTORMS MOVING SOUTHWEST INTO AVOYELLES PARISH.

* THE CLUSTER OF STRONG THUNDERSTORMS WILL BE NEAR...
  MOREAUVILLE BY 845 PM...
  BIG BEND BY 855 PM...
  BORDELONVILLE BY 900 PM...
  BROUILLETTE BY 920 PM...
  LAKE OPHELIA NATIONAL WILDLIFE REFUGE BY 925 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO
NICKEL SIZE HAIL...AND WIND GUSTS TO NEAR 40 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 3132 9200 3129 9201 3123 9199 3125 9194
      3128 9195 3130 9191 3123 9179 3121 9170
      3119 9167 3114 9171 3106 9171 3098 9180
      3092 9179 3089 9183 3095 9204 3135 9203

SWEENEY

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 5:00 AM CDT	Special Weather Statement	LCH	St. Mary	60 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.