Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 481

April 1, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2005, 4:55 PM CST for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2005, 4:55 PM CST (22:55 UTC)
Expired: Apr 1, 2005, 6:00 PM CST
In force: 65 min
Issued by: the Storm Prediction Center

All 44 counties

Autauga County, AL, Butler County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Conecuh County, AL, Coosa County, AL, Crenshaw County, AL, DeKalb County, AL, Elmore County, AL, Escambia County, AL, Etowah County, AL, Lowndes County, AL, Monroe County, AL, Montgomery County, AL, Talladega County, AL, Tallapoosa County, AL, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Murray County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Cherokee County, NC, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Hamilton County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN

The radar

The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 22:57 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.9 hours before the alert went out and 123 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: 28 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 1, 1:29 AM CST	Mesoscale Discussion	SPC	Baldwin, Clarke, Escambia, Mobile, Washington	2 hr
Apr 1, 2:05 AM CST	Tornado Watch	SPC	Baldwin, Coffee, Conecuh, Covington, Escambia, Mobile and 1 more	5 hr
Apr 1, 11:16 AM CST	Mesoscale Discussion	SPC	Colbert, Franklin, Lauderdale, Limestone	2 hr
Apr 1, 11:20 AM CST	Mesoscale Discussion	SPC	Bibb, Blount, Chilton, Choctaw, Cullman, Dallas and 18 more	115 min
Apr 1, 11:45 AM CST	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Chilton, Colbert, Cullman and 26 more	6 hr
Apr 1, 3:00 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Chilton, Cullman, Dallas, Greene and 13 more	90 min
Apr 1, 3:19 PM CST	Mesoscale Discussion	SPC	Baldwin, Choctaw, Clarke, Conecuh, Mobile, Monroe and 2 more	116 min
Apr 1, 7:44 AM CST	Mesoscale Discussion	SPC	Atkinson, Berrien, Brooks, Charlton, Clinch, Colquitt and 9 more	2 hr
Apr 1, 10:30 AM CST	Tornado Watch	SPC	Atkinson, Brantley, Brooks, Camden, Charlton, Clinch and 11 more	8 hr
Apr 1, 1:16 PM CST	Mesoscale Discussion	SPC	Brantley, Camden, Charlton, Clinch, Echols, Pierce and 1 more	119 min
Apr 1, 5:23 PM CST	Mesoscale Discussion	SPC	Atkinson, Brantley, Brooks, Camden, Charlton, Clinch and 11 more	67 min

Nearby

Mesoscale Discussions in Alabama, 2005 Mesoscale Discussions in Georgia, 2005 Mesoscale Discussions in Tennessee, 2005 Every mesoscale discussion in 2005

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.