Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 5, NWS Lake Charles, LA

March 17, 2021Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Mar 17, 2021, 3:53 PM CDT for Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 52 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: Mar 17, 2021, 3:53 PM CDT (20:53 UTC)
Expired: Mar 17, 2021, 4:45 PM CDT
In force: 52 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 17, 2:38 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.9 hours before the alert went out and 157 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: 458 J/kg
Mixed-layer CIN: -397 J/kg
Mixed-layer LCL: 1132 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

154 
WUUS54 KLCH 172053
SVRLCH
LAC045-099-101-172145-
/O.NEW.KLCH.SV.W.0005.210317T2053Z-210317T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
353 PM CDT Wed Mar 17 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northern Iberia Parish in south central Louisiana...
  Northwestern St. Mary Parish in south central Louisiana...
  Central St. Martin Parish in south central Louisiana...

* Until 445 PM CDT.

* At 352 PM CDT, severe thunderstorms were located along a line
  extending from near St. Martinville to near Lydia to 6 miles
  northwest of Cote Blanche Island, moving east at 60 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  New Iberia, Franklin, St. Martinville, Jeanerette, Cypremort Point,
  Baldwin, Loreauville, Glencoe, Lydia, Sorrel, Lake Fausse Pointe,
  Charenton, Pierre Part and Weeks Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for south central
Louisiana.

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

&&

LAT...LON 2973 9185 2975 9186 2979 9185 2977 9184
      2979 9182 2982 9182 2983 9184 2994 9180
      3014 9186 3024 9151 3023 9147 3020 9149
      3010 9146 3010 9139 3006 9137 3006 9127
      3003 9124 3004 9122 2998 9126 2987 9120
TIME...MOT...LOC 2052Z 253DEG 54KT 3010 9178 2996 9174 2983 9179 

HAIL...<.75IN
WIND...70MPH
 
$$

13

1 follow-up statement

307 
WWUS54 KLCH 172127
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
427 PM CDT Wed Mar 17 2021

LAC045-099-101-172145-
/O.CON.KLCH.SV.W.0005.000000T0000Z-210317T2145Z/
Iberia LA-St. Mary LA-St. Martin LA-
427 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHEASTERN IBERIA...NORTHWESTERN ST. MARY AND CENTRAL ST.
MARTIN PARISHES...

At 427 PM CDT, severe thunderstorms were located along a line
extending from near Acadiana Regional Airport to New Iberia to Lydia
to 6 miles southeast of Avery Island, moving northeast at 50 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
New Iberia, St. Martinville, Jeanerette, Loreauville, Sorrel, Lydia,
Lake Fausse Pointe and Weeks Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM CDT for south central
Louisiana.

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

&&

LAT...LON 3023 9149 3021 9148 3020 9149 3010 9146
      3010 9141 2995 9140 2978 9183 2979 9182
      2981 9182 2987 9180 2996 9178 3012 9185
      3017 9174 3024 9151
TIME...MOT...LOC 2127Z 240DEG 60KT 3006 9184 2999 9179 2992 9179 2985
9183

HAIL...<.75IN
WIND...70MPH
 
$$

Rua

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 2:53 AM CDT	Wind Advisory	LCH	Avoyelles, Cameron, Evangeline, Lafayette, Saint Landry, Saint Martin	16 hr
Mar 17, 2:55 AM CDT	Marine Dense Fog Advisory	LCH		11 hr
Mar 17, 2:55 AM CDT	Small Craft Advisory	LCH		52 hr
Mar 17, 12:39 PM CDT	Special Weather Statement	LCH	Cameron	51 min
Mar 17, 12:48 PM CDT	Special Weather Statement	LCH	Calcasieu	42 min
Mar 17, 1:24 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	36 min
Mar 17, 1:33 PM CDT	Special Marine Warning	LCH		57 min
Mar 17, 1:40 PM CDT	Special Weather Statement	LCH	Allen	35 min
Mar 17, 1:46 PM CDT	Special Weather Statement	LCH	Vernon	29 min
Mar 17, 2:01 PM CDT	Special Weather Statement	LCH	Acadia, Jefferson Davis	44 min
Mar 17, 2:30 PM CDT	Special Marine Warning	LCH		60 min
Mar 17, 2:32 PM CDT	Special Weather Statement	LCH	Beauregard	43 min
Mar 17, 2:41 PM CDT	Small Craft Advisory	LCH		40 hr
Mar 17, 3:03 PM CDT	Special Weather Statement	LCH	Vermilion	42 min
Mar 17, 3:28 PM CDT	Special Marine Warning	LCH		62 min
Mar 17, 3:42 PM CDT	Special Weather Statement	LCH	Rapides	48 min
Mar 17, 3:44 PM CDT	Special Weather Statement	LCH	Saint Martin	46 min
Mar 17, 3:58 PM CDT	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	62 min
Mar 17, 4:19 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	44 min
Mar 17, 4:35 PM CDT	Special Marine Warning	LCH		55 min
Mar 17, 4:49 PM CDT	Special Weather Statement	LCH	Saint Martin	41 min
Mar 17, 5:00 PM CDT	Special Weather Statement	LCH	Acadia, Saint Landry	30 min
Mar 17, 5:31 PM CDT	Special Marine Warning	LCH		89 min
Mar 17, 6:08 PM CDT	Special Weather Statement	LCH	Iberia, St. Mary	97 min
Mar 17, 6:21 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	39 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; the sounding from the Mesonet's radiosonde archive.