Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 2460

October 26, 200317 counties in Alabama; 8 counties in Florida; 14 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2003, 9:23 AM CST for 17 counties in Alabama; 8 counties in Florida; 14 counties in Georgia. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Oct 26, 2003, 9:23 AM CST (15:23 UTC)
Expired: Oct 26, 2003, 10:30 AM CST
In force: 67 min
Issued by: the Storm Prediction Center

All 39 counties

Barbour County, AL, Bullock County, AL, Chambers County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Walton County, FL, Washington County, FL, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Early County, GA, Harris County, GA, Marion County, GA, Miller County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Webster County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.4 hours before the alert went out and 190 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: 559 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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
Oct 26, 1:40 AM CDT	Mesoscale Discussion	SPC	Choctaw	95 min
Oct 26, 2:00 AM CST	Tornado Watch	SPC	Baldwin, Conecuh, Escambia, Mobile, Monroe, Washington	5 hr
Oct 26, 5:24 AM CST	Mesoscale Discussion	SPC	Baldwin, Conecuh, Covington, Escambia, Mobile, Monroe	96 min
Oct 26, 6:05 AM CST	Tornado Watch	SPC	Autauga, Barbour, Bullock, Butler, Coffee, Conecuh and 14 more	5 hr

Nearby

Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in Florida, 2003 Every mesoscale discussion in 2003

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.