Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Memphis, TN

March 17, 2021Lafayette County, Marshall County, Yalobusha County, Mississippi

NWS Memphis, TN issued this special weather statement at Mar 17, 2021, 6:33 PM CDT for Lafayette County, Marshall County, Yalobusha County, Mississippi. It was in force for 42 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: Mar 17, 2021, 6:33 PM CDT (23:33 UTC)
Expired: Mar 17, 2021, 7:15 PM CDT
In force: 42 min
Issued by: NWS Memphis, TN

Counties Lafayette County, MS, Marshall County, MS, Yalobusha County, MS

The radar

The Memphis radar (KNQA), 121 km from the middle of the area, began a volume at 23:32 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

Little Rock, AR (KLZK), launched 12:00Z, 11.6 hours before the alert went out and 66 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: 18 J/kg
Mixed-layer CIN: -262 J/kg
Mixed-layer LCL: 1466 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Memphis, TN wrote its last area forecast discussion before this special weather statement went out at Mar 17, 3:47 PM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Mar 17, 3:47 PM CDT, 2 hours 46 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 17, 4:23 PM CDT, 2 hours 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>

In the hours before

Special weather statement, Mar 17, 5:53 PM CDT, 40 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 17, 5:54 PM CDT, 39 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 17, 6:09 PM CDT, 24 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 17, 6:26 PM CDT, 7 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 17, 6:27 PM CDT, 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 17, 6:33 PM CDT, 0 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 Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 17, 3:38 AM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Pontotoc, Yalobusha	37 min
Mar 17, 5:24 AM CDT	Severe Thunderstorm Warning	MEG	Panola, Tate	20 min
Mar 17, 6:35 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Panola, Quitman, Tallahatchie, Tunica	40 min
Mar 17, 6:49 AM CDT	Severe Thunderstorm Warning	MEG	Marshall	14 min
Mar 17, 7:12 AM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Marshall, Panola, Quitman, Tallahatchie, Tate and 1 more	48 min
Mar 17, 8:24 AM CDT	Areal Flood Advisory	MEG	Benton, DeSoto, Marshall, Tate, Tunica	2 hr
Mar 17, 9:04 AM CDT	Flash Flood Warning	MEG	Alcorn, Benton, DeSoto, Marshall, Tate, Tippah	3 hr
Mar 17, 10:29 AM CDT	Flash Flood Warning	MEG	Alcorn, Prentiss, Tishomingo	3 hr
Mar 17, 3:18 PM CDT	Tornado Warning	MEG	Itawamba, Prentiss, Tishomingo	27 min
Mar 17, 4:17 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Pontotoc, Union	28 min
Mar 17, 4:28 PM CDT	Areal Flood Advisory	MEG	Itawamba, Prentiss, Tishomingo	5 hr
Mar 17, 4:43 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Lafayette, Marshall, Union	32 min
Mar 17, 4:52 PM CDT	Flash Flood Warning	MEG	Itawamba, Lee, Prentiss, Tishomingo	4 hr
Mar 17, 4:56 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Pontotoc, Prentiss, Union	49 min
Mar 17, 4:58 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Pontotoc	20 min
Mar 17, 5:45 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	45 min
Mar 17, 5:55 PM CDT	Flash Flood Warning	MEG	Calhoun, Chickasaw	4 hr
Mar 17, 5:55 PM CDT	Tornado Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	35 min
Mar 17, 6:28 PM CDT	Severe Thunderstorm Warning	MEG	Itawamba, Monroe	47 min
Mar 17, 11:38 AM CDT	Flash Flood Warning	MEG	Shelby, Tipton	3 hr
Mar 17, 12:24 PM CDT	Special Weather Statement	MEG	Shelby	36 min
Mar 17, 12:31 PM CDT	Special Weather Statement	MEG	Tipton	29 min
Mar 17, 1:18 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Fayette, Hardeman, Haywood, Madison, Tipton	42 min
Mar 17, 1:54 PM CDT	Flash Flood Warning	MEG	Shelby	3 hr
Mar 17, 1:58 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Decatur, Hardeman, Henderson, Madison	47 min
Mar 17, 5:26 PM CDT	River Flood Warning	MEG	Crockett, Dyer, Lauderdale	15 hr
Mar 17, 5:53 PM CDT	Special Weather Statement	MEG	Cross, Poinsett	37 min
Mar 17, 6:26 PM CDT	Special Weather Statement	MEG	Craighead	34 min
Mar 17, 6:37 PM CDT	Flash Flood Warning	MEG	Craighead, Cross, Poinsett	3 hr

Nearby

Special Weather Statements in Mississippi, 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.