Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 18, NWS Shreveport, LA

March 9, 2019Lincoln Parish, Union Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 9, 2019, 1:28 PM CST for Lincoln Parish, Union Parish, Louisiana. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 9, 2019, 1:28 PM CST (19:28 UTC)
Expired: Mar 9, 2019, 2:00 PM CST
In force: 32 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lincoln Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 127 km from the middle of the area, began a volume at 19:29 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
Mar 9, 7:18 AM CST	Severe Thunderstorm Watch	SPC	8 hr
Mar 9, 11:05 AM CST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 7.5 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: 968 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 7.4

Open this sounding in Storm Lab

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.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 9, 12:18 PM CST, 1 hour 10 minutes earlier.

Area forecast discussion, Mar 9, 12:18 PM CST, 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, Mar 9, 11:59 AM CST, 1 hour 29 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>

In the hours before

Special weather statement, Mar 9, 12:12 PM CST, 1 hour 16 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>

Local storm report, Mar 9, 12:22 PM CST, 1 hour 6 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, Mar 9, 12:28 PM CST, 1 hour 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, Mar 9, 12:47 PM CST, 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, Mar 9, 12:50 PM CST, 38 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, Mar 9, 12:52 PM CST, 36 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 Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 9, 6:03 AM CST	Special Weather Statement	SHV	Red River	42 min
Mar 9, 6:55 AM CST	Special Weather Statement	SHV	Red River	50 min
Mar 9, 7:08 AM CST	Severe Thunderstorm Warning	SHV	Red River	67 min
Mar 9, 8:41 AM CST	Severe Thunderstorm Warning	SHV	Camp, Franklin, Morris, Smith, Titus, Upshur and 1 more	49 min
Mar 9, 9:24 AM CST	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Rusk, Smith, Upshur and 1 more	66 min
Mar 9, 9:29 AM CST	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Morris, Red River, Titus and 1 more	61 min
Mar 9, 10:14 AM CST	Tornado Warning	SHV	Bowie, Cass	16 min
Mar 9, 10:24 AM CST	Severe Thunderstorm Warning	SHV	Bowie, Cass, Marion	66 min
Mar 9, 10:33 AM CST	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk, Smith	42 min
Mar 9, 10:40 AM CST	Tornado Warning	SHV	Cass, Marion	50 min
Mar 9, 11:17 AM CST	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk	43 min
Mar 9, 11:34 AM CST	Special Weather Statement	SHV	Cherokee, Rusk	41 min
Mar 9, 11:56 AM CST	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	39 min
Mar 9, 12:04 PM CST	Special Weather Statement	SHV	Panola, Shelby	41 min
Mar 9, 12:12 PM CST	Special Weather Statement	SHV	Nacogdoches	48 min
Mar 9, 12:50 PM CST	Special Weather Statement	SHV	Shelby	40 min
Mar 9, 12:52 PM CST	Special Weather Statement	SHV	Nacogdoches	38 min
Mar 9, 1:44 PM CST	Special Weather Statement	SHV	Shelby	46 min
Mar 9, 3:13 PM CST	Special Weather Statement	SHV	Angelina	32 min
Mar 9, 11:20 AM CST	Severe Thunderstorm Warning	SHV	Claiborne, Webster	40 min
Mar 9, 11:24 AM CST	Tornado Warning	SHV	Claiborne, Webster	36 min
Mar 9, 11:59 AM CST	Severe Thunderstorm Warning	SHV	Claiborne	37 min
Mar 9, 12:47 PM CST	Special Weather Statement	SHV	Lincoln, Union	43 min
Mar 9, 1:31 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln	44 min
Mar 9, 1:52 PM CST	Special Weather Statement	SHV	Lincoln, Union	38 min
Mar 9, 2:05 PM CST	Special Weather Statement	SHV	Bienville, Lincoln	40 min
Mar 9, 2:32 PM CST	Special Weather Statement	SHV	Sabine	43 min
Mar 9, 2:36 PM CST	Special Weather Statement	SHV	Red River	39 min
Mar 9, 3:26 PM CST	Special Weather Statement	SHV	Natchitoches	34 min
Mar 9, 4:04 PM CST	Special Weather Statement	SHV	Ouachita	26 min
Mar 9, 4:08 PM CST	Special Weather Statement	SHV	Natchitoches	37 min
Mar 9, 5:50 AM CST	Special Weather Statement	SHV	Howard, Sevier	40 min
Mar 9, 7:41 AM CST	Severe Thunderstorm Warning	SHV	Howard, Sevier	34 min
Mar 9, 8:17 AM CST	Severe Thunderstorm Warning	SHV	Howard, Sevier	43 min
Mar 9, 12:28 PM CST	Special Weather Statement	SHV	Union	47 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019 Every severe thunderstorm warning in 2019

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.