Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

December 18, 2021Lafayette Parish, Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Dec 18, 2021, 3:56 PM CST for Lafayette Parish, Saint Martin Parish, Louisiana. It was in force for 34 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, 3:56 PM CST (21:56 UTC)
Expired: Dec 18, 2021, 4:30 PM CST
In force: 34 min
Issued by: NWS Lake Charles, LA
Hail: 0.50 in
Wind: 30

Counties Lafayette Parish, LA, Saint Martin Parish, LA

The radar

The Lake Charles radar (KLCH), 126 km from the middle of the area, began a volume at 21:57 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 12:00Z, 9.9 hours before the alert went out and 124 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, 23 minutes earlier.

Area forecast discussion, Dec 18, 3:33 PM CST, 23 minutes before

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Hazardous weather outlook, Dec 18, 3:01 PM CST, 55 minutes before

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In the hours before

Special weather statement, Dec 18, 1:43 PM CST, 2 hours 13 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
143 PM CST Sat Dec 18 2021

LAZ027-028-031-182015-
Allen LA-Vernon LA-Rapides LA-
143 PM CST Sat Dec 18 2021

...Strong thunderstorms will impact portions of western Rapides,
eastern Vernon and north central Allen Parishes through 215 PM CST...

At 143 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Gardner to near Cravens. Movement was east
at 25 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Alexandria, Pineville, Boyce, Elizabeth, Alexandria International
Airport, Hineston, Lena, Pitkin, Ball, Tioga, Timber Trails,
Flatwoods, Otis, Elmer, Kingsville, Sieper, Lacamp, Fullerton,
Clifton and Leander.

This includes Interstate 49 between mile markers 76 and 80, and
between mile markers 82 and 109.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3149 9270 3150 9268 3147 9269 3147 9271
      3145 9271 3145 9268 3142 9269 3141 9268
      3140 9269 3140 9267 3139 9266 3146 9229
      3085 9269 3090 9322 3142 9286 3152 9272
TIME...MOT...LOC 1943Z 269DEG 20KT 3132 9272 3096 9309

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Donato

Special weather statement, Dec 18, 2:15 PM CST, 1 hour 41 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
215 PM CST Sat Dec 18 2021

LAZ031>033-041>043-052-074-182100-
Calcasieu LA-Acadia LA-Jefferson Davis LA-Vermilion LA-St. Landry LA-
Evangeline LA-Allen LA-East Cameron LA-
215 PM CST Sat Dec 18 2021

...Strong thunderstorms will impact portions of northeastern Cameron,
Jefferson Davis, Evangeline, Acadia, southeastern Calcasieu,
northwestern Vermilion, western St. Landry and eastern Allen Parishes
through 300 PM CST...

At 214 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Allen Parish Airport to Holmwood. Movement
was east at 55 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Opelousas, Crowley, Eunice, Jennings, Rayne, Oakdale, Ville Platte,
Church Point, Mamou, Welsh, Iowa, Lake Arthur, Kinder, Basile,
Oberlin, Iota, Gueydan, Elton, Mermentau and Fenton.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 39 and 88.
 Interstate 49 between mile markers 28 and 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3073 9200 2983 9248 3008 9319 3085 9274
TIME...MOT...LOC 2014Z 288DEG 49KT 3077 9272 3013 9310

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Donato

Special weather statement, Dec 18, 2:45 PM CST, 1 hour 11 minutes before

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Local storm report, Dec 18, 2:54 PM CST, 1 hour 2 minutes before

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Special weather statement, Dec 18, 3:00 PM CST, 56 minutes before

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Special weather statement, Dec 18, 3:56 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, 4:40 PM CST	Special Weather Statement	LCH	Iberia, Lafayette, Saint Martin, St. Mary	65 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; radar from the NEXRAD Level II archive.