Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

August 10, 2012Bibb County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 10, 2012, 5:30 PM CDT for Bibb County, Alabama. It was in force for 30 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: Aug 10, 2012, 5:30 PM CDT (22:30 UTC)
Expired: Aug 10, 2012, 6:00 PM CDT
In force: 30 min
Issued by: NWS Birmingham, AL

County Bibb County, AL

The radar

The Birmingham radar (KBMX), 35 km from the middle of the area, began a volume at 22:30 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

Birmingham, AL (KBMX), launched 12:00Z, 10.5 hours before the alert went out and 34 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: 99 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Aug 9, 6:59 PM CDT, 22 hours 31 minutes earlier.

Area forecast discussion, Aug 9, 6:59 PM CDT, 22 hours 31 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.
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</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 3:54 PM CDT	Special Weather Statement	BMX	Greene	36 min
Aug 10, 4:37 PM CDT	Special Weather Statement	BMX	Hale	23 min
Aug 10, 5:11 PM CDT	Special Weather Statement	BMX	Bibb	34 min
Aug 10, 5:36 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Tuscaloosa	39 min
Aug 10, 6:08 PM CDT	Special Weather Statement	BMX	Jefferson	52 min
Aug 10, 6:12 PM CDT	Special Weather Statement	BMX	Shelby	48 min
Aug 10, 6:47 PM CDT	Special Weather Statement	BMX	Chilton	43 min
Aug 10, 6:57 PM CDT	Special Weather Statement	BMX	Shelby	48 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.