Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

April 10, 2021Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 10, 2021, 5:00 AM CDT for Calcasieu Parish, 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: Apr 10, 2021, 5:00 AM CDT (10:00 UTC)
Expired: Apr 10, 2021, 6:00 AM CDT
In force: 60 min
Issued by: NWS Lake Charles, LA

County Calcasieu Parish, LA

The radar

The Lake Charles radar (KLCH), 6 km from the middle of the area, began a volume at 10:01 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 00:00Z, 10.0 hours before the alert went out and 7 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: 2773 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 733 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Apr 10, 3:50 AM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Apr 10, 3:50 AM CDT, 1 hour 10 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Apr 9, 5:35 AM CDT, 23 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
535 AM CDT Fri Apr 9 2021

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-101045-
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Calcasieu-Jefferson Davis-Acadia-Lafayette-Upper St. Martin-
Vermilion-Iberia-St. Mary-Lower St. Martin-West Cameron-East Cameron-
Tyler-Hardin-Jefferson-Orange-Northern Jasper-Northern Newton-
Southern Jasper-Southern Newton-
535 AM CDT Fri Apr 9 2021

This Hazardous Weather Outlook is for central Louisiana, south
central Louisiana, southwest Louisiana, west central Louisiana and
southeast Texas.

.DAY ONE...Today and tonight.

There will be a slight chance for showers and thunderstorms today
across east Texas and central Louisiana. Strong to severe storms will
be possible across central Louisiana tonight. The main threats will
be large hail and damaging winds. An isolated tornado will be
possible.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight.

GMZ430-432-435-450-452-455-470-472-475-101045-
Sabine Lake-Calcasieu Lake-Vermilion Bay-
Coastal waters from Cameron LA to High Island TX out 20 NM-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
Coastal waters from Lower Atchafalaya River to Intracoastal City LA
out 20 NM-Waters from Cameron LA to High Island TX from 20 to 60 NM-
Waters from Intracoastal City to Cameron LA from 20 to 60 NM-
Waters from Lower Atchafalaya River to Intracoastal City LA from
20 to 60 NM-
535 AM CDT Fri Apr 9 2021

This Hazardous Weather Outlook is for the Gulf of Mexico and the
coastal lakes and bays of the Gulf of Mexico.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Apr 10, 12:52 AM CDT, 4 hours 8 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
1252 AM CDT Sat Apr 10 2021

LAZ027-TXZ260-100630-
Vernon LA-Northern Newton TX-
1252 AM CDT Sat Apr 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR VERNON PARISH IN WEST CENTRAL
LOUISIANA AND NORTHEASTERN NEWTON COUNTIES UNTIL 130 AM CDT...

At 1252 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles east of Many to 6 miles southwest of
Hornbeck to near Mayflower. Movement was east at 45 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Leesville, Rosepine, Anacoco, Toledo Bend Dam, Fort Polk, Slagle,
Burkeville, New Llano, Hornbeck, Hutton, Burr Ferry, Mayflower,
Kurthwood, Simpson, Wiergate, Evans and Pickering.

A Tornado Watch remains in effect until 700 AM CDT for central
Louisiana.

LAT...LON 3132 9288 3106 9296 3086 9348 3088 9354
      3087 9355 3111 9387 3117 9373 3117 9358
      3120 9355 3124 9356 3128 9351 3128 9344
      3136 9339 3137 9303
TIME...MOT...LOC 0552Z 292DEG 39KT 3155 9334 3124 9346 3110 9382

24

Special weather statement, Apr 10, 4:58 AM CDT, 2 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
458 AM CDT Sat Apr 10 2021

LAZ043>045-052>055-074-101100-
Lower St. Martin LA-Acadia LA-Iberia LA-Lafayette LA-Vermilion LA-
Upper St. Martin LA-St. Mary LA-East Cameron LA-
458 AM CDT Sat Apr 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR IBERIA...EASTERN CAMERON...
LAFAYETTE...NORTHWESTERN ST. MARY...SOUTH CENTRAL ACADIA...VERMILION
AND ST. MARTIN PARISHES UNTIL 600 AM CDT...

At 458 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles south of Grosse Tete to Cade to near
Lacassine National Wildlife Refuge. Movement was east at 30 mph.

Penny size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Lafayette, New Iberia, Abbeville, Catahoula, Scott, Breaux Bridge,
Franklin, St. Martinville, Jeanerette, Kaplan, Lake Arthur, Gueydan,
Rockefeller Wildlife Range, Forked Island, Intracoastal City,
Lacassine National Wildlife Refuge, Avery Island, Cypremort Point,
Pecan Island and Klondike.

A Tornado Watch remains in effect until 700 AM CDT for south central,
central and southwestern Louisiana.

LAT...LON 2993 9123 2972 9162 2975 9160 2970 9186
      2982 9182 2983 9197 2972 9215 2973 9215
      2976 9213 2975 9221 2966 9213 2962 9274
      2970 9293 3001 9294 3019 9217 3043 9164
      3026 9159 3023 9147 3011 9147 3004 9122
TIME...MOT...LOC 0958Z 279DEG 27KT 3031 9141 3007 9188 2994 9285

24

Special weather statement, Apr 10, 5:00 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
500 AM CDT Sat Apr 10 2021

LAZ030-041-042-073-074-TXZ216-101100-
Calcasieu LA-West Cameron LA-Jefferson Davis LA-Beauregard LA-
East Cameron LA-Orange TX-
500 AM CDT Sat Apr 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CAMERON...
NORTHWESTERN JEFFERSON DAVIS...SOUTH CENTRAL BEAUREGARD...CALCASIEU
PARISHES IN SOUTHWESTERN LOUISIANA AND EAST CENTRAL ORANGE COUNTIES
UNTIL 600 AM CDT...

At 500 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Topsy to 6 miles southeast of Vinton.
Movement was east at 40 mph.

Penny size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Lake Charles, Sulphur, Orange, Westlake, West Orange, Vinton, Iowa,
Fenton, Grand Lake, Moss Bluff, Lake Charles Regional Airport, De
Quincy, Topsy, Toomey, Lebleu Settlement, Gillis, Edgerly, Sweet
Lake, Carlyss and Buller.

A Tornado Watch remains in effect until 700 AM CDT for southwestern
Louisiana.

LAT...LON 2997 9327 3002 9327 3005 9329 3005 9333
      2999 9334 3009 9376 3044 9347 3044 9313
      3042 9313 3043 9277 2994 9315
TIME...MOT...LOC 1000Z 277DEG 33KT 3039 9315 3011 9354

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 9:08 PM CDT	Special Weather Statement	LCH	Rapides	82 min
Apr 9, 9:24 PM CDT	Severe Thunderstorm Warning	LCH	Rapides	81 min
Apr 10, 12:28 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	47 min
Apr 10, 12:52 AM CDT	Special Weather Statement	LCH	Vernon	38 min
Apr 10, 12:53 AM CDT	Tornado Warning	LCH	Avoyelles, Rapides	22 min
Apr 10, 1:10 AM CDT	Tornado Warning	LCH	Avoyelles	35 min
Apr 10, 1:13 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Evangeline, Saint Landry	47 min
Apr 10, 1:22 AM CDT	Tornado Warning	LCH	Avoyelles, Saint Landry	23 min
Apr 10, 1:34 AM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	41 min
Apr 10, 1:40 AM CDT	Tornado Warning	LCH	Avoyelles, Saint Landry	18 min
Apr 10, 1:42 AM CDT	Tornado Warning	LCH	Saint Landry	33 min
Apr 10, 2:11 AM CDT	Tornado Warning	LCH	Saint Landry	34 min
Apr 10, 4:11 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu	49 min
Apr 10, 4:58 AM CDT	Special Weather Statement	LCH	Lafayette, Saint Martin, Vermilion	62 min
Apr 10, 6:01 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	29 min
Apr 10, 6:05 AM CDT	Special Weather Statement	LCH	Iberia, St. Mary, Vermilion	40 min
Apr 10, 6:51 AM CDT	Special Marine Warning	LCH		54 min
Apr 10, 6:55 AM CDT	Special Weather Statement	LCH	Vermilion	50 min
Apr 10, 10:44 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	31 min
Apr 10, 11:14 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	12 min
Apr 10, 11:56 AM CDT	River Flood Warning	LCH	Beauregard, Calcasieu	3 hr
Apr 10, 12:55 AM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	15 min
Apr 10, 3:34 AM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	41 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.