Alert archive / Alabama / Special Weather Statements in 2018

Special Weather Statement, NWS Birmingham, AL

September 6, 2018Marion County, Alabama

NWS Birmingham, AL issued this special weather statement at Sep 6, 2018, 3:03 PM CDT for Marion County, Alabama. It was in force for 27 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: Sep 6, 2018, 3:03 PM CDT (20:03 UTC)
Expired: Sep 6, 2018, 3:30 PM CDT
In force: 27 min
Issued by: NWS Birmingham, AL

County Marion County, AL

The radar

The Columbus AFB radar (KGWX), 63 km from the middle of the area, began a volume at 20:06 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 (KBYH), launched 12:00Z, 8.1 hours before the alert went out and 215 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: 276 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 455 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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>

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 6, 1:09 PM CDT	Special Weather Statement	BMX	Etowah	36 min
Sep 6, 1:28 PM CDT	Special Weather Statement	BMX	St. Clair	32 min
Sep 6, 2:02 PM CDT	Special Weather Statement	BMX	Walker	28 min
Sep 6, 2:03 PM CDT	Special Weather Statement	BMX	Marshall	27 min
Sep 6, 2:15 PM CDT	Special Weather Statement	BMX	Tuscaloosa	30 min
Sep 6, 3:23 PM CDT	Special Weather Statement	BMX	Winston	37 min
Sep 6, 3:56 PM CDT	Special Weather Statement	BMX	Winston	34 min
Sep 6, 5:50 PM CDT	Areal Flood Advisory	BMX	Marengo	115 min

Nearby

Special Weather Statements in Alabama, 2018 Every special weather statement in 2018

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.