Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Lake Charles, LA

December 10, 2012Avoyelles Parish, Rapides Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Dec 10, 2012, 4:05 AM CST for Avoyelles Parish, Rapides Parish, Louisiana. It was in force for 40 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: Dec 10, 2012, 4:05 AM CST (10:05 UTC)
Expired: Dec 10, 2012, 4:45 AM CST
In force: 40 min
Issued by: NWS Lake Charles, LA

Counties Avoyelles Parish, LA, Rapides Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.1 hours before the alert went out and 146 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: 466 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.8

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 Dec 10, 4:02 AM CST, 3 minutes earlier.

Area forecast discussion, Dec 10, 4:02 AM CST, 3 minutes before

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Hazardous weather outlook, Dec 9, 4:59 AM CST, 23 hours 6 minutes before

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In the hours before

Special weather statement, Dec 10, 2:43 AM CST, 1 hour 22 minutes before

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Special weather statement, Dec 10, 3:35 AM CST, 30 minutes before

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Special weather statement, Dec 10, 4:05 AM CST, 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
Dec 10, 3:35 AM CST	Special Weather Statement	LCH	Beauregard, Calcasieu	40 min
Dec 10, 3:37 AM CST	Special Marine Warning	LCH		23 min
Dec 10, 4:14 AM CST	Special Weather Statement	LCH	Allen, Evangeline	46 min
Dec 10, 4:28 AM CST	Special Weather Statement	LCH	Cameron	62 min
Dec 10, 4:29 AM CST	Special Marine Warning	LCH		46 min
Dec 10, 7:06 AM CST	Special Weather Statement	LCH	Saint Martin	39 min
Dec 10, 8:20 AM CST	Special Marine Warning	LCH		55 min
Dec 10, 2:29 PM CST	Freeze Warning	LCH	Allen, Avoyelles, Beauregard, Evangeline, Rapides, Saint Landry and 1 more	19 hr
Dec 10, 2:43 AM CST	Special Weather Statement	LCH	Orange	47 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.