Alert archive / Alabama / Mesoscale Discussions in 2004

Mesoscale Discussion 2336

October 19, 200412 counties in Alabama; Dade County, Georgia; 4 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 19, 2004, 7:08 AM CDT for 12 counties in Alabama; Dade County, Georgia; 4 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Oct 19, 2004, 7:08 AM CDT (12:08 UTC)
Expired
Oct 19, 2004, 9:15 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Cherokee County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Lawrence County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Dade County, GA, Chickasaw County, MS, Itawamba County, MS, Lee County, MS, Monroe County, MS

The radar

The Columbus AFB radar (KGWX), 101 km from the middle of the area, began a volume at 12:10 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 0.1 hours before the alert went out and 144 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2004-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1233 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2004-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1233 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.3

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.

IssuedProductOfficeCountiesLasted
Oct 18, 7:10 PM CDTTornado WatchSPCColbert, Fayette, Franklin, Greene, Hale, Lamar and 8 more4 hr
Oct 18, 10:33 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Limestone117 min
Oct 18, 10:55 PM CDTTornado WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more5 hr
Oct 19, 2:04 AM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more86 min
Oct 19, 3:34 AM CDTMesoscale DiscussionSPCColbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 4 more26 min
Oct 19, 3:50 AM CDTSevere Thunderstorm WatchSPCCherokee, Colbert, Cullman, DeKalb, Etowah, Franklin and 9 more4 hr
Oct 19, 9:05 AM CDTTornado WatchSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more7 hr
Oct 19, 11:06 AM CDTMesoscale DiscussionSPCBarbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 10 more84 min
Oct 19, 12:00 PM CDTTornado WatchSPCBarbour, Bullock, Butler, Choctaw, Clarke, Coffee and 16 more7 hr
Oct 19, 1:15 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more90 min
Oct 19, 3:08 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 43 more67 min
Oct 19, 3:30 PM CDTTornado WatchSPCAutauga, Bibb, Chilton, Clay, Coosa, Dallas and 16 more6 hr
Oct 19, 5:48 PM CDTMesoscale DiscussionSPCButler, Choctaw, Clarke, Coffee, Conecuh, Covington and 13 more117 min
Oct 19, 6:20 PM CDTTornado WatchSPCBarbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 16 more4 hr
Oct 19, 2:06 PM CDTMesoscale DiscussionSPCBaker, Brooks, Calhoun, Chattahoochee, Clay, Colquitt and 26 more84 min
Oct 18, 9:09 PM CDTMesoscale DiscussionSPCAlcorn, Benton2 hr
Oct 19, 1:35 PM CDTMesoscale DiscussionSPCAdams, Amite, Franklin, Hancock, Issaquena, Jefferson and 3 more2 hr

Nearby

Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Mississippi, 2004Mesoscale Discussions in Georgia, 2004Every mesoscale discussion in 2004

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.