Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS Lake Charles, LA

May 11, 2021Lafayette Parish, Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 11, 2021, 7:48 AM CDT for Lafayette Parish, Saint Landry Parish, Louisiana. It was in force for 16 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: May 11, 2021, 7:48 AM CDT (12:48 UTC)
Expired: May 11, 2021, 8:04 AM CDT
In force: 16 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Lafayette Parish, LA, Saint Landry Parish, LA

The radar

The Lake Charles radar (KLCH), 112 km from the middle of the area, began a volume at 12:52 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
May 11, 7:50 AM CDT	HAIL 0.5	Cankton, LA	PHOTO FROM PUBLIC.

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 12:00Z, 0.8 hours before the alert went out and 110 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: 2925 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 472 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 11.9

Open this sounding in Storm Lab

The text

As transmitted.

147 
WUUS54 KLCH 111248
SVRLCH
LAC055-097-111315-
/O.NEW.KLCH.SV.W.0075.210511T1248Z-210511T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
748 AM CDT Tue May 11 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  North central Lafayette Parish in south central Louisiana...
  South central St. Landry Parish in central Louisiana...

* Until 815 AM CDT.

* At 748 AM CDT, a severe thunderstorm was located over Cankton, or
  near Church Point, moving north at 15 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Scott, Carencro, Sunset, Grand Coteau and Cankton. 

This includes Interstate 49 between mile markers 5 and 14.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3041 9197 3041 9198 3039 9198 3026 9210
      3028 9214 3028 9216 3029 9214 3032 9214
      3032 9216 3035 9216 3035 9218 3049 9217
      3043 9195
TIME...MOT...LOC 1248Z 200DEG 11KT 3035 9213 

HAIL...1.00IN
WIND...<50MPH
 
$$

Tingler

1 follow-up statement

873 
WWUS54 KLCH 111304
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
804 AM CDT Tue May 11 2021

LAC055-097-111314-
/O.CAN.KLCH.SV.W.0075.000000T0000Z-210511T1315Z/
Lafayette LA-St. Landry LA-
804 AM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LAFAYETTE AND
SOUTH CENTRAL ST. LANDRY PARISHES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

LAT...LON 3041 9197 3041 9198 3039 9198 3026 9210
      3028 9214 3028 9216 3029 9214 3032 9214
      3032 9216 3035 9216 3035 9218 3049 9217
      3043 9195
TIME...MOT...LOC 1302Z 200DEG 11KT 3040 9211 

$$

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:59 PM CDT	River Flood Warning	LCH	Acadia, Evangeline, Saint Landry	23 hr
May 11, 3:20 AM CDT	Flash Flood Watch	LCH	Allen, Avoyelles, Beauregard, Cameron, Evangeline, Lafayette and 4 more	34 hr
May 11, 6:14 AM CDT	Special Weather Statement	LCH	Saint Martin	16 min
May 11, 6:29 AM CDT	Special Weather Statement	LCH	Vernon	31 min
May 11, 6:50 AM CDT	Special Weather Statement	LCH	Vernon	25 min
May 11, 6:55 AM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	18 min
May 11, 7:17 AM CDT	Special Weather Statement	LCH	Acadia	43 min
May 11, 7:22 AM CDT	Special Weather Statement	LCH	Rapides	23 min
May 11, 8:04 AM CDT	Special Weather Statement	LCH	Acadia, Lafayette	41 min
May 11, 8:40 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Jefferson Davis	33 min
May 11, 8:52 AM CDT	Flash Flood Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	3 hr
May 11, 10:24 AM CDT	River Flood Watch	LCH	Allen, Evangeline	25 hr
May 11, 10:24 AM CDT	River Flood Warning	LCH	Lafayette, Saint Landry, Saint Martin	4 days
May 11, 10:24 AM CDT	River Flood Warning	LCH	Lafayette, Saint Martin, Vermilion	33 days
May 11, 10:24 AM CDT	River Flood Warning	LCH	Allen, Calcasieu, Jefferson Davis	18 days
May 11, 10:24 AM CDT	River Flood Warning	LCH	Allen, Beauregard	21 days
May 11, 10:24 AM CDT	River Flood Warning	LCH	Allen, Beauregard	4 days
May 11, 6:43 PM CDT	Special Weather Statement	LCH	Saint Martin	47 min
May 11, 6:57 PM CDT	Tornado Warning	LCH	Iberia, St. Mary	33 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.