Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 117, NWS Lake Charles, LA

October 27, 20219 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Oct 27, 2021, 1:30 PM CDT for 9 parishes in Louisiana. It was in force for 60 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: Oct 27, 2021, 1:30 PM CDT (18:30 UTC)
Expired: Oct 27, 2021, 2:30 PM CDT
In force: 60 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Acadia Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Lafayette Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 119 km from the middle of the area, began a volume at 18:29 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 watch it was issued in

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

Issued	Product	Office	Lasted
Oct 27, 7:55 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.5 hours before the alert went out and 118 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: 1422 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.1

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS54 KLCH 271830
SVRLCH
LAC001-023-039-045-055-097-099-101-113-271930-
/O.NEW.KLCH.SV.W.0117.211027T1830Z-211027T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
130 PM CDT Wed Oct 27 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Iberia Parish in south central Louisiana...
  Southeastern Cameron Parish in southwestern Louisiana...
  Lafayette Parish in south central Louisiana...
  Northwestern St. Mary Parish in south central Louisiana...
  Southeastern Evangeline Parish in central Louisiana...
  Acadia Parish in southwestern Louisiana...
  Vermilion Parish in southwestern Louisiana...
  Northwestern St. Martin Parish in south central Louisiana...
  St. Landry Parish in central Louisiana...

* Until 230 PM CDT.

* At 130 PM CDT, severe thunderstorms were located along a line
  extending from near Reddell to near Crowley to near Rockefeller
  Wildlife Range, moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Lafayette, New Iberia, Opelousas, Crowley, Abbeville, Catahoula,
  Eunice, Scott, Breaux Bridge, Rayne, Carencro, Ville Platte, St.
  Martinville, Jeanerette, Kaplan, Church Point, Mamou, Iota, Gueydan
  and Krotz Springs.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 69 and 128.
 Interstate 49 between mile markers 1 and 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 PM CDT for central, south
central and southwestern Louisiana.

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

A Tornado Watch remains in effect until 400 PM CDT for central, south
central and southwestern Louisiana.

&&

LAT...LON 2956 9200 2962 9202 2961 9205 2952 9198
      2953 9199 2958 9205 2953 9231 2966 9286
      3009 9262 3072 9247 3075 9176 3071 9173
      3050 9175 3044 9164 3024 9156 2975 9175
      2964 9190 2960 9181 2949 9185
TIME...MOT...LOC 1830Z 272DEG 39KT 3071 9241 3021 9244 2966 9285 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brazzell

2 follow-up statements

880 
WWUS54 KLCH 271853
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
153 PM CDT Wed Oct 27 2021

LAC001-023-039-045-055-097-099-101-113-271930-
/O.CON.KLCH.SV.W.0117.000000T0000Z-211027T1930Z/
Iberia LA-Cameron LA-Lafayette LA-St. Mary LA-Evangeline LA-
Acadia LA-Vermilion LA-St. Martin LA-St. Landry LA-
153 PM CDT Wed Oct 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR IBERIA...SOUTHEASTERN CAMERON...LAFAYETTE...NORTHWESTERN ST.
MARY...SOUTHEASTERN EVANGELINE...ACADIA...VERMILION...NORTHWESTERN
ST. MARTIN AND ST. LANDRY PARISHES...

At 153 PM CDT, severe thunderstorms were located along a line
extending from near Grand Prairie to Duson to near Rockefeller
Wildlife Range, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lafayette, New Iberia, Opelousas, Crowley, Abbeville, Catahoula,
Scott, Breaux Bridge, Rayne, Carencro, Ville Platte, St. Martinville,
Jeanerette, Kaplan, Church Point, Gueydan, Krotz Springs, Leonville,
Arnaudville and Melville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 PM CDT for central, south
central and southwestern Louisiana.

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

&&

LAT...LON 2956 9200 2962 9202 2960 9207 2956 9201
      2959 9213 2953 9231 2966 9286 3010 9262
      3043 9238 3072 9238 3075 9176 3050 9175
      3044 9164 3036 9165 3024 9156 2975 9175
      2971 9185 2964 9190 2960 9181 2949 9185
TIME...MOT...LOC 1853Z 269DEG 36KT 3071 9217 3021 9221 2969 9271 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brazzell

096 
WWUS54 KLCH 271915
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
215 PM CDT Wed Oct 27 2021

LAC039-271924-
/O.CAN.KLCH.SV.W.0117.000000T0000Z-211027T1930Z/
Evangeline LA-
215 PM CDT Wed Oct 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN EVANGELINE PARISH
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 400 PM CDT for south central,
central and southwestern Louisiana.

LAT...LON 2956 9200 2962 9202 2960 9207 2956 9201
      2959 9213 2953 9231 2966 9286 3009 9261
      3050 9219 3073 9213 3075 9176 3050 9175
      3044 9164 3036 9165 3024 9156 2975 9175
      2971 9185 2964 9190 2960 9181 2949 9185
TIME...MOT...LOC 1914Z 264DEG 25KT 3071 9191 3022 9201 2970 9247 

$$

LAC001-023-045-055-097-099-101-113-271930-
/O.CON.KLCH.SV.W.0117.000000T0000Z-211027T1930Z/
Iberia LA-Cameron LA-Lafayette LA-St. Mary LA-Acadia LA-Vermilion LA-
St. Martin LA-St. Landry LA-
215 PM CDT Wed Oct 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR IBERIA...SOUTHEASTERN CAMERON...LAFAYETTE...NORTHWESTERN ST.
MARY...CENTRAL ACADIA...VERMILION...NORTHWESTERN ST. MARTIN AND ST.
LANDRY PARISHES...

At 214 PM CDT, severe thunderstorms were located along a line
extending from Palmetto to Lafayette to near Pecan Island, moving
east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lafayette, New Iberia, Opelousas, Crowley, Abbeville, Catahoula,
Scott, Breaux Bridge, Rayne, Carencro, St. Martinville, Jeanerette,
Kaplan, Church Point, Gueydan, Krotz Springs, Leonville, Arnaudville,
Melville and Palmetto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 PM CDT for south central,
central and southwestern Louisiana.

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

&&

LAT...LON 2956 9200 2962 9202 2960 9207 2956 9201
      2959 9213 2953 9231 2966 9286 3009 9261
      3050 9219 3073 9213 3075 9176 3050 9175
      3044 9164 3036 9165 3024 9156 2975 9175
      2971 9185 2964 9190 2960 9181 2949 9185
TIME...MOT...LOC 1914Z 264DEG 25KT 3071 9191 3022 9201 2970 9247 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brazzell

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 27, 7:22 AM CDT	Special Marine Warning	LCH		38 min
Oct 27, 8:01 AM CDT	Special Marine Warning	LCH		25 min
Oct 27, 9:21 AM CDT	Tornado Warning	LCH	Calcasieu	24 min
Oct 27, 9:41 AM CDT	Tornado Warning	LCH	Calcasieu	34 min
Oct 27, 10:09 AM CDT	Tornado Warning	LCH	Beauregard, Calcasieu	36 min
Oct 27, 10:39 AM CDT	Tornado Warning Tornado observed	LCH	Beauregard	36 min
Oct 27, 11:04 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	26 min
Oct 27, 11:13 AM CDT	Special Marine Warning	LCH		47 min
Oct 27, 11:14 AM CDT	Severe Thunderstorm Warning	LCH	Cameron	31 min
Oct 27, 11:19 AM CDT	Severe Thunderstorm Warning	LCH	Rapides	26 min
Oct 27, 11:30 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LCH	Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 3 more	60 min
Oct 27, 11:33 AM CDT	Special Marine Warning	LCH		57 min
Oct 27, 11:46 AM CDT	Tornado Warning Tornado observed	LCH	Beauregard, Calcasieu	17 min
Oct 27, 11:53 AM CDT	Tornado Warning	LCH	Calcasieu	37 min
Oct 27, 11:55 AM CDT	Tornado Warning	LCH	Calcasieu, Cameron	35 min
Oct 27, 12:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LCH	Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 4 more	63 min
Oct 27, 12:31 PM CDT	Tornado Warning	LCH	Allen, Beauregard, Vernon	17 min
Oct 27, 12:35 PM CDT	Special Marine Warning	LCH		55 min
Oct 27, 12:56 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline, Rapides, Vernon	34 min
Oct 27, 1:26 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Avoyelles, Evangeline, Rapides, Saint Landry	34 min
Oct 27, 1:31 PM CDT	Special Marine Warning	LCH		59 min
Oct 27, 1:56 PM CDT	Special Weather Statement	LCH	Avoyelles	34 min
Oct 27, 2:06 PM CDT	Tornado Warning	LCH	Cameron, Vermilion	10 min
Oct 27, 2:22 PM CDT	Special Marine Warning	LCH		53 min
Oct 27, 2:24 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Landry, Saint Martin, Vermilion	66 min
Oct 27, 3:30 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary, Vermilion	60 min
Oct 27, 4:00 PM CDT	Special Marine Warning	LCH		60 min
Oct 27, 4:29 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	61 min
Oct 27, 5:00 PM CDT	Special Marine Warning	LCH		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; radar from the NEXRAD Level II archive.