Alert archive / Alabama / Mesoscale Discussions in 2023

Mesoscale Discussion 348

March 26, 202319 counties in Alabama; 13 counties in Georgia; 11 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2023, 4:01 AM CDT for 19 counties in Alabama; 13 counties in Georgia; 11 counties in Mississippi. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Mar 26, 2023, 4:01 AM CDT (09:01 UTC)
Expired
Mar 26, 2023, 6:00 AM CDT
In force
119 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 81...82...83
All 43 counties

Autauga County, AL, Bibb County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lee County, AL, Marengo County, AL, Perry County, AL, Randolph County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Butts County, GA, Clayton County, GA, Coweta County, GA, Fayette County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Lamar County, GA, Meriwether County, GA, Pike County, GA, Spalding County, GA, Troup County, GA, Upson County, GA, Clarke County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS

The radar

The Birmingham radar (KBMX), 49 km from the middle of the area, began a volume at 09:04 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 00:00Z, 9.0 hours before the alert went out and 49 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 00:00Z on 2023-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 00:00Z on 2023-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939587897117Sfc1 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
6 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
2573 m above ground
0-6 km bulk shear
77 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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
Mar 25, 10:40 PM CDTMesoscale DiscussionSPCAutauga, Chambers, Choctaw, Clarke, Dallas, Elmore and 7 more3 hr
Mar 26, 12:59 AM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Bullock, Chambers, Chilton, Clay and 17 more7 hr
Mar 26, 1:55 AM CDTMesoscale DiscussionSPCChoctaw, Sumter, Washington2 hr
Mar 26, 2:37 AM CDTSevere Thunderstorm WatchSPCChoctaw, Clarke, Wilcox5 hr
Mar 26, 6:19 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Chambers, Chilton, Clay, Coosa and 13 more56 min
Mar 26, 6:34 AM CDTTornado WatchSPCAutauga, Barbour, Bullock, Butler, Chambers, Chilton and 19 more5 hr
Mar 26, 9:29 AM CDTMesoscale DiscussionSPCAutauga, Choctaw, Dallas, Elmore, Lee, Lowndes and 5 more91 min
Mar 26, 11:23 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Clarke, Coffee and 16 more2 hr
Mar 26, 12:02 PM CDTSevere Thunderstorm WatchSPCAutauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 23 more6 hr
Mar 26, 2:07 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Clarke, Coffee and 17 more113 min
Mar 26, 5:11 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Bullock, Butler, Chambers, Chilton and 21 more94 min
Mar 26, 5:49 PM CDTTornado WatchSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 33 more7 hr
Mar 26, 6:46 PM CDTMesoscale DiscussionSPCBibb, Chilton, Choctaw, Greene, Hale, Marengo and 4 more119 min
Mar 26, 1:46 AM CDTMesoscale DiscussionSPCBaldwin, Bibb, Butts, Chattahoochee, Crawford, Fayette and 27 more89 min
Mar 26, 2:22 AM CDTSevere Thunderstorm WatchSPCBibb, Butts, Chattahoochee, Clayton, Coweta, Crawford and 24 more6 hr
Mar 26, 5:04 AM CDTMesoscale DiscussionSPCBaldwin, Burke, Columbia, Glascock, Greene, Hancock and 14 more116 min
Mar 26, 5:32 AM CDTSevere Thunderstorm WatchSPCBaldwin, Bleckley, Bulloch, Burke, Candler, Clarke and 32 more6 hr
Mar 26, 4:47 PM CDTMesoscale DiscussionSPCBaker, Baldwin, Ben Hill, Bibb, Bleckley, Butts and 55 more88 min
Mar 26, 7:32 AM CDTMesoscale DiscussionSPCClarke, Jasper, Lauderdale, Smith28 min
Mar 26, 3:06 PM CDTMesoscale DiscussionSPCAdams, Amite, Claiborne, Clarke, Copiah, Covington and 28 more114 min
Mar 26, 3:57 PM CDTTornado WatchSPCAdams, Amite, Claiborne, Clarke, Copiah, Covington and 31 more7 hr
Mar 26, 5:14 PM CDTMesoscale DiscussionSPCClarke, Copiah, Covington, Jasper, Lauderdale, Newton and 3 more61 min

Nearby

Mesoscale Discussions in Alabama, 2023Mesoscale Discussions in Georgia, 2023Mesoscale Discussions in Mississippi, 2023Every mesoscale discussion in 2023

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.