Alert archive / Louisiana / Special Weather Statements in 2020

Special Weather Statement, NWS Lake Charles, LA

April 12, 2020Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Apr 12, 2020, 2:25 PM CDT for Saint Martin Parish, Louisiana. It was in force for 35 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 12, 2020, 2:25 PM CDT (19:25 UTC)
Expired: Apr 12, 2020, 3:00 PM CDT
In force: 35 min
Issued by: NWS Lake Charles, LA

County Saint Martin Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 191 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: 1968 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 580 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

As transmitted.

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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 11, 4:44 PM CDT, 21 hours 41 minutes earlier.

Area forecast discussion, Apr 11, 4:44 PM CDT, 21 hours 41 minutes before

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Hazardous weather outlook, Apr 11, 3:39 PM CDT, 22 hours 46 minutes before

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  <title>Service Notice</title>
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</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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 1:11 AM CDT	Coastal Flood Advisory	LCH		18 hr
Apr 12, 11:02 AM CDT	River Flood Warning	LCH	Calcasieu	18 hr
Apr 12, 11:02 AM CDT	River Flood Warning	LCH	Calcasieu	25 hr
Apr 12, 12:54 PM CDT	Special Weather Statement	LCH	Lafayette	51 min
Apr 12, 1:05 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin, Vermilion	40 min
Apr 12, 1:45 PM CDT	Special Weather Statement	LCH	Lafayette	45 min
Apr 12, 4:56 PM CDT	Special Weather Statement	LCH	Vernon	49 min
Apr 12, 5:37 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Rapides, Vernon	23 min
Apr 12, 2:11 PM CDT	Special Weather Statement	LCH	Jasper	34 min

Nearby

Special Weather Statements in Louisiana, 2020 Every special weather statement in 2020

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.