Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 91, NWS New Orleans, LA

April 28, 1991Avoyelles Parish, Saint Landry Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 28, 1991, 3:11 PM CDT for Avoyelles Parish, Saint Landry Parish, Louisiana. It was in force for 64 min.

The area

The counties it named.

The facts

Issued: Apr 28, 1991, 3:11 PM CDT (20:11 UTC)
Expired: Apr 28, 1991, 4:15 PM CDT
In force: 64 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Avoyelles Parish, LA, Saint Landry Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.2 hours before the alert went out and 140 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: 2466 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 536 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 13.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 28, 11:16 AM CDT, 3 hours 55 minutes before

LAZ006-281645-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1115 AM CDT SUN APR 28 1991

...A SEVERE THUNDERSTORM WATCH IS CANCELLED FOR CATAHOULA AND CONCORDIA
PARISHES IN EAST CENTRAL LOUISIANA...

RADARS SHOWED THE STRONG THUNDERSTORMS CONTINUE TO THE NORTH OF THESE
PARISHES.

THE SEVERE STORMS FORECAST CENTER EXPECTS ANOTHER OUTBREAK OF SEVERE
WEATHER LATER THIS AFTERNOON AND TONIGHT WHICH WILL LIKELY INCLUDE A
LARGE PA0RT OF THE AREA.  PEOPLE THROUGHOUT EAST CENTRAL LOUISIANA
SHOULD KEEP ABREAST OF THE LATEST FORECASTS AND SEVERE WEATHER
BULLETINS ISSUED FOR YOUR LOCATION.

Special weather statement, Apr 28, 2:30 PM CDT, 41 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>

Special weather statement, Apr 28, 3:06 PM CDT, 5 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>

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 1:22 AM CDT	Severe Thunderstorm Warning	LIX	Avoyelles	68 min
Apr 28, 2:50 AM CDT	Severe Thunderstorm Warning	LIX	Concordia	55 min
Apr 28, 1:14 PM CDT	Severe Thunderstorm Warning	LIX	Iberia, Saint Martin	31 min
Apr 28, 1:16 PM CDT	Severe Thunderstorm Warning	LIX	Ascension	29 min
Apr 28, 1:16 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, Iberville	59 min
Apr 28, 1:40 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, West Baton Rouge	65 min
Apr 28, 2:00 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston	60 min
Apr 28, 2:00 PM CDT	Tornado Warning	LIX	West Baton Rouge	60 min
Apr 28, 2:20 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston	55 min
Apr 28, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	Saint Martin	37 min
Apr 28, 3:31 PM CDT	Severe Thunderstorm Warning	LIX	Iberville, West Baton Rouge	59 min
Apr 28, 4:59 PM CDT	Severe Thunderstorm Warning	LIX	Avoyelles, Saint Landry	61 min
Apr 28, 5:37 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, Iberville	38 min
Apr 28, 6:07 PM CDT	Severe Thunderstorm Warning	LIX	West Feliciana	53 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1991 Every severe thunderstorm warning in 1991

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.