Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

December 18, 20214 parishes in Louisiana

NWS Lake Charles, LA issued this special weather statement at Dec 18, 2021, 4:40 PM CST for 4 parishes in Louisiana. It was in force for 65 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 18, 2021, 4:40 PM CST (22:40 UTC)
Expired: Dec 18, 2021, 5:45 PM CST
In force: 65 min
Issued by: NWS Lake Charles, LA
Hail: 0.00 in
Wind: 40

Counties Iberia Parish, LA, Lafayette Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.7 hours before the alert went out and 155 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: 1750 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 441 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

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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 18, 3:33 PM CST, 1 hour 7 minutes earlier.

Area forecast discussion, Dec 18, 3:33 PM CST, 1 hour 7 minutes before

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Hazardous weather outlook, Dec 18, 3:01 PM CST, 1 hour 39 minutes before

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In the hours before

Special weather statement, Dec 18, 3:56 PM CST, 44 minutes before

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Local storm report, Dec 18, 3:59 PM CST, 41 minutes before

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Local storm report, Dec 18, 4:01 PM CST, 39 minutes before

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Local storm report, Dec 18, 4:07 PM CST, 33 minutes before

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Local storm report, Dec 18, 4:25 PM CST, 15 minutes before

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Special weather statement, Dec 18, 4:40 PM 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 18, 3:25 AM CST	Small Craft Advisory	LCH		57 hr
Dec 18, 12:52 PM CST	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu, Vernon	38 min
Dec 18, 1:30 PM CST	Special Marine Warning	LCH		30 min
Dec 18, 1:30 PM CST	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis, Vernon	49 min
Dec 18, 1:32 PM CST	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	58 min
Dec 18, 1:43 PM CST	Special Weather Statement	LCH	Rapides	32 min
Dec 18, 1:47 PM CST	Special Marine Warning	LCH		58 min
Dec 18, 2:15 PM CST	Special Weather Statement	LCH	Acadia, Allen, Evangeline, Jefferson Davis	45 min
Dec 18, 2:20 PM CST	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	25 min
Dec 18, 2:45 PM CST	Special Weather Statement	LCH	Cameron	60 min
Dec 18, 2:50 PM CST	Special Marine Warning	LCH		85 min
Dec 18, 3:00 PM CST	Special Weather Statement	LCH	Acadia, Saint Landry	30 min
Dec 18, 3:56 PM CST	Special Weather Statement	LCH	Lafayette, Saint Martin	34 min
Dec 18, 11:26 AM CST	Special Weather Statement	LCH	Tyler	34 min
Dec 18, 11:52 AM CST	Special Weather Statement	LCH	Hardin	23 min
Dec 18, 12:11 PM CST	Special Weather Statement	LCH	Jasper, Newton	34 min
Dec 18, 12:13 PM CST	Special Weather Statement	LCH	Hardin	32 min
Dec 18, 12:28 PM CST	Severe Thunderstorm Warning	LCH	Hardin, Jasper, Newton, Tyler	45 min
Dec 18, 12:44 PM CST	Special Weather Statement	LCH	Jefferson, Orange	31 min

Nearby

Special Weather Statements in Louisiana, 2021 Every special weather statement in 2021

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.