Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 90, NWS Shreveport, LA

April 13, 2019Natchitoches Parish, Sabine Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 13, 2019, 2:12 AM CDT for Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 33 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: Apr 13, 2019, 2:12 AM CDT (07:12 UTC)
Expired: Apr 13, 2019, 2:45 AM CDT
In force: 33 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 2.5 in
Wind: 60.0 mph

Counties Natchitoches Parish, LA, Sabine Parish, LA

The radar

The Ft Polk radar (KPOE), 64 km from the middle of the area, began a volume at 07:14 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, 7.2 hours before the alert went out and 170 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: 707 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 625 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 335 m²/s²
0-3 km storm-relative helicity: 550 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

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 Apr 12, 11:53 PM CDT, 2 hours 19 minutes earlier.

Area forecast discussion, Apr 12, 11:53 PM CDT, 2 hours 19 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 12, 12:15 PM CDT, 13 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
1215 PM CDT Fri Apr 12 2019

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-131715-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
1215 PM CDT Fri Apr 12 2019

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...This Afternoon and Tonight...

Thunderstorms will gradually increase in coverage late tonight. A
few storms could be severe, especially along and north of Interstate
20 in east Texas, extreme Northwest Louisiana, extreme southwest
Arkansas, and southeast Oklahoma. Large hail will be the biggest
threat. Locally heavy rain may also lead to isolated flash
flooding.

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

A low pressure system will move from central Texas across the
ArkLaTex and into Arkansas Saturday into Saturday night, bringing
a potential tornado outbreak to the area with severe thunderstorms
likely. Initially on Saturday morning, large hail and damaging
winds will be the primary threats during the morning hours, mainly
north of Interstate 20, ahead of a northward moving warm front.
By late Saturday morning into the afternoon, most of the Four
State Region will be within the warm sector. Multiple rounds of
severe thunderstorms are expected. Tornadoes, damaging winds,
large hail, and locally heavy rainfall will be possible. In far
east Texas, southern Arkansas, and northern Louisiana, a few of
the tornadoes may be strong, long-tracked tornadoes. Rainfall
amounts of one to three inches are likely, which may lead to
isolated flooding. The severe weather threat should quickly end
shortly after midnight Sunday morning.

More thunderstorms are possible late Tuesday through early Thursday.
Some of these storms may be strong to severe Wednesday and
Wednesday night. In addition, heavy rainfall may lead to a renewed
threat for flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected tonight, but will be needed on
Saturday.

04-Woodrum

In the hours before

Special weather statement, Apr 13, 12:07 AM CDT, 2 hours 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>

Special weather statement, Apr 13, 12:20 AM CDT, 1 hour 52 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 13, 12:22 AM CDT, 1 hour 50 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 13, 12:49 AM CDT, 1 hour 23 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 13, 12:59 AM CDT, 1 hour 13 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 13, 1:24 AM CDT, 48 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
Apr 12, 9:39 PM CDT	River Flood Warning	SHV	Nacogdoches, Rusk, San Augustine, Shelby	15 days
Apr 12, 11:09 PM CDT	Special Weather Statement	SHV	Franklin, Red River, Titus	51 min
Apr 13, 12:07 AM CDT	Special Weather Statement	SHV	San Augustine	23 min
Apr 13, 12:20 AM CDT	Special Weather Statement	SHV	Shelby	40 min
Apr 13, 12:22 AM CDT	Special Weather Statement	SHV	Sabine, San Augustine	38 min
Apr 13, 12:59 AM CDT	Special Weather Statement	SHV	Camp, Upshur	46 min
Apr 13, 1:42 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	47 min
Apr 13, 2:47 AM CDT	Special Weather Statement	SHV	Smith	28 min
Apr 13, 2:50 AM CDT	Special Weather Statement	SHV	Upshur, Wood	40 min
Apr 13, 2:53 AM CDT	Lake Wind Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	37 hr
Apr 13, 3:27 AM CDT	Flash Flood Watch	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more	16 hr
Apr 13, 3:50 AM CDT	Special Weather Statement	SHV	Harrison	40 min
Apr 13, 4:33 AM CDT	Special Weather Statement	SHV	Cass, Harrison, Marion	42 min
Apr 13, 4:46 AM CDT	Severe Thunderstorm Warning	SHV	Harrison	44 min
Apr 13, 7:50 AM CDT	River Flood Warning	SHV	Smith, Wood	49 hr
Apr 13, 7:51 AM CDT	River Flood Warning	SHV	Gregg, Smith, Upshur, Wood	21 days
Apr 13, 7:52 AM CDT	River Flood Warning	SHV	Gregg, Rusk	21 days
Apr 13, 7:53 AM CDT	River Flood Warning	SHV	Gregg	46 hr
Apr 13, 9:15 AM CDT	Special Weather Statement	SHV	San Augustine, Shelby	45 min
Apr 13, 9:18 AM CDT	Severe Thunderstorm Warning	SHV	San Augustine, Shelby	42 min
Apr 13, 9:42 AM CDT	River Flood Warning	SHV	Franklin, Morris, Titus	6 days
Apr 13, 9:43 AM CDT	River Flood Warning	SHV	Gregg, Harrison, Marion, Upshur	21 days
Apr 13, 9:53 AM CDT	Severe Thunderstorm Warning	SHV	Panola, Shelby	14 min
Apr 13, 10:21 AM CDT	Flash Flood Warning	SHV	Harrison, Panola, Shelby	3 hr
Apr 13, 10:27 AM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion	31 min
Apr 13, 10:29 AM CDT	Severe Thunderstorm Warning	SHV	Harrison, Panola	31 min
Apr 13, 10:31 AM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	29 min
Apr 13, 10:33 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	42 min
Apr 13, 10:51 AM CDT	Areal Flood Advisory	SHV	Bowie, Cass	114 min
Apr 13, 10:53 AM CDT	Severe Thunderstorm Warning	SHV	Cass, Marion	11 min
Apr 13, 11:35 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches	40 min
Apr 13, 11:38 AM CDT	Tornado Warning	SHV	Cherokee, Nacogdoches	33 min
Apr 13, 12:12 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Panola, Rusk	20 min
Apr 13, 1:05 PM CDT	Tornado Warning	SHV	Cherokee, Nacogdoches	40 min
Apr 13, 1:36 PM CDT	Tornado Warning	SHV	Angelina, Cherokee, Nacogdoches	24 min
Apr 13, 1:39 PM CDT	Tornado Warning	SHV	Cherokee, Nacogdoches, Rusk	36 min
Apr 13, 1:58 PM CDT	Tornado Warning	SHV	Rusk	15 min
Apr 13, 2:01 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches, San Augustine	44 min
Apr 13, 2:08 PM CDT	Tornado Warning	SHV	Nacogdoches, Rusk	11 min
Apr 13, 2:19 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Gregg, Harrison, Panola, Rusk, Shelby and 3 more	41 min
Apr 13, 2:37 PM CDT	Tornado Warning	SHV	Nacogdoches, San Augustine, Shelby	10 min
Apr 13, 2:41 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	45 min
Apr 13, 2:46 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk, Shelby	44 min
Apr 13, 2:55 PM CDT	Tornado Warning	SHV	Sabine, San Augustine	14 min
Apr 13, 3:05 PM CDT	Tornado Warning	SHV	Sabine	25 min
Apr 13, 3:11 PM CDT	Severe Thunderstorm Warning	SHV	Sabine, San Augustine, Shelby	64 min
Apr 13, 3:13 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion, Panola, Shelby	50 min
Apr 13, 3:26 PM CDT	Tornado Warning	SHV	Sabine	19 min
Apr 12, 10:47 PM CDT	Special Weather Statement	SHV	Natchitoches	28 min
Apr 12, 11:51 PM CDT	Special Weather Statement	SHV	Red River	24 min
Apr 13, 12:49 AM CDT	Special Weather Statement	SHV	De Soto	41 min
Apr 13, 1:24 AM CDT	Special Weather Statement	SHV	Sabine	51 min
Apr 13, 2:40 AM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Winn	50 min
Apr 13, 2:54 AM CDT	Special Weather Statement	SHV	Natchitoches	51 min
Apr 13, 2:58 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Winn	62 min
Apr 13, 3:06 AM CDT	Special Weather Statement	SHV	Bossier, Caddo	39 min
Apr 13, 3:26 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Winn	25 min
Apr 13, 4:16 AM CDT	Special Weather Statement	SHV	Jackson, Ouachita	44 min
Apr 13, 5:04 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	41 min
Apr 13, 5:32 AM CDT	Special Weather Statement	SHV	Bossier, Webster	43 min
Apr 13, 6:18 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne	42 min
Apr 13, 6:57 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	48 min
Apr 13, 7:46 AM CDT	Special Weather Statement	SHV	Union	44 min
Apr 13, 9:26 AM CDT	River Flood Warning	SHV	Lincoln, Ouachita, Union	4 days
Apr 13, 10:36 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Natchitoches	24 min
Apr 13, 10:49 AM CDT	Areal Flood Advisory	SHV	Bossier, Caddo, De Soto	116 min
Apr 13, 11:11 AM CDT	Flash Flood Warning	SHV	Bossier, Caddo, De Soto	3 hr
Apr 13, 11:18 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Natchitoches	42 min
Apr 13, 11:37 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto, Webster	53 min
Apr 13, 11:48 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln	22 min
Apr 13, 12:34 PM CDT	Flash Flood Warning	SHV	Bienville, Claiborne, De Soto, Lincoln, Natchitoches, Red River and 1 more	5 hr
Apr 13, 12:55 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Red River, Webster	65 min
Apr 13, 1:09 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Natchitoches, Red River and 1 more	66 min
Apr 13, 1:47 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln, Ouachita, Union	58 min
Apr 13, 2:00 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Jackson, Natchitoches, Ouachita, Winn	60 min
Apr 13, 2:16 PM CDT	Tornado Warning	SHV	Caldwell, Jackson, Ouachita, Winn	29 min
Apr 13, 2:28 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle	62 min
Apr 13, 2:47 PM CDT	Severe Thunderstorm Warning	SHV	Jackson, Lincoln, Ouachita, Union	43 min
Apr 13, 2:59 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, LaSalle, Ouachita, Winn	46 min
Apr 13, 3:29 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita, Union	6 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.