Alert archive / Louisiana / Special Weather Statements in 2018

Special Weather Statement, NWS Lake Charles, LA

April 3, 2018Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 3, 2018, 11:21 PM CDT for Avoyelles Parish, Louisiana. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 3, 2018, 11:21 PM CDT (04:21 UTC)
Expired: Apr 4, 2018, 12:00 AM CDT
In force: 39 min
Issued by: NWS Lake Charles, LA

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 110 km from the middle of the area, began a volume at 04:24 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.

What was reported inside it

Time	Report	Where	Remark
Apr 3, 11:29 PM CDT	TSTM WND DMG	Plaucheville, LA	MINOR DAMAGE TO A COUPLE OF HOMES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.4 hours before the alert went out and 169 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: 1661 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 630 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

As transmitted.

771 
WWUS84 KLCH 040421
SPSLCH

Special Weather Statement
National Weather Service Lake Charles LA
1121 PM CDT TUE APR 3 2018
 
LAZ029-040500-
Avoyelles LA-
1121 PM CDT TUE APR 3 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL AVOYELLES PARISH UNTIL
MIDNIGHT CDT...

At 1121 PM CDT, Doppler radar was tracking a strong thunderstorm over
Cottonport, or near Moreauville, moving east at 45 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Marksville, Bunkie, Simmesport, Moreauville, Bordelonville,
Cottonport, Mansura, Hessmer, Evergreen, Plaucheville, Big Bend and
Hamburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

A severe thunderstorm watch remains in effect until midnight CDT for
central Louisiana.

LAT...LON 3114 9172 3112 9172 3112 9171 3109 9172
      3108 9171 3106 9171 3099 9178 3098 9180
      3094 9180 3094 9221 3108 9216 3115 9203
      3116 9171
TIME...MOT...LOC 0421Z 287DEG 38KT 3099 9208 

$$

RACKLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:33 PM CDT	Special Weather Statement	LCH	Rapides	42 min
Apr 3, 7:42 PM CDT	Special Weather Statement	LCH	Rapides, Vernon	48 min
Apr 3, 8:53 PM CDT	Severe Thunderstorm Warning	LCH	Vernon	37 min
Apr 3, 9:00 PM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	45 min
Apr 3, 9:13 PM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Vernon	47 min
Apr 3, 9:30 PM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Rapides, Vernon	60 min
Apr 3, 9:39 PM CDT	Areal Flood Advisory	LCH	Beauregard, Vernon	3 hr
Apr 3, 9:56 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Evangeline, Jefferson Davis, Rapides and 1 more	34 min
Apr 3, 10:29 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Avoyelles, Evangeline, Rapides	61 min
Apr 3, 10:42 PM CDT	Tornado Warning	LCH	Evangeline	12 min
Apr 3, 10:58 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Evangeline, Saint Landry	47 min
Apr 4, 1:20 AM CDT	Special Marine Warning	LCH		55 min
Apr 4, 2:13 AM CDT	Special Marine Warning	LCH		92 min
Apr 4, 3:29 AM CDT	Special Marine Warning	LCH		91 min
Apr 4, 5:04 AM CDT	Special Marine Warning	LCH		41 min
Apr 4, 9:25 AM CDT	Wind Advisory	LCH	Cameron, Lafayette, Saint Martin	5 hr
Apr 3, 8:24 PM CDT	Special Weather Statement	LCH	Newton	36 min
Apr 3, 8:31 PM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	29 min

Nearby

Special Weather Statements in Louisiana, 2018 Every special weather statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.