Alert archive / Alabama / Mesoscale Discussions in 2009

Mesoscale Discussion 1111

June 14, 200938 counties in Alabama; 10 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2009, 10:45 AM CDT for 38 counties in Alabama; 10 counties in Mississippi. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 14, 2009, 10:45 AM CDT (15:45 UTC)
Expired: Jun 14, 2009, 12:15 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 48 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Coosa County, AL, Cullman County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Chickasaw County, MS, Clay County, MS, Itawamba County, MS, Lee County, MS, Lowndes County, MS, Monroe County, MS, Noxubee County, MS, Oktibbeha County, MS, Prentiss County, MS, Tishomingo County, MS

The radar

The Birmingham radar (KBMX), 60 km from the middle of the area, began a volume at 15:47 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, 3.8 hours before the alert went out and 59 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: 2687 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 496 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

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

<!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>

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 14, 8:38 AM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Calhoun, Chilton, Clay and 25 more	97 min
Jun 14, 8:50 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 42 more	6 hr
Jun 14, 1:34 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Coffee, Conecuh, Covington, Crenshaw, Dale and 6 more	5 hr
Jun 13, 8:14 PM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Holmes, Humphreys, Leake, Leflore and 3 more	61 min
Jun 14, 12:07 PM CDT	Mesoscale Discussion	SPC	Attala, Holmes, Humphreys, Issaquena, Kemper, Lauderdale and 10 more	83 min

Nearby

Mesoscale Discussions in Alabama, 2009 Mesoscale Discussions in Mississippi, 2009 Every mesoscale discussion in 2009

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.