Alert archive / Georgia / Mesoscale Discussions in 2016

Mesoscale Discussion 329

April 1, 2016Nassau County, Florida; 15 counties in Georgia; Beaufort County, Colleton County, Jasper County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2016, 5:40 PM EDT for Nassau County, Florida; 15 counties in Georgia; Beaufort County, Colleton County, Jasper County, South Carolina. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2016, 5:40 PM EDT (21:40 UTC)
Expired: Apr 1, 2016, 6:45 PM EDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Nassau County, FL, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Echols County, GA, Effingham County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA, Beaufort County, SC, Colleton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 106 km from the middle of the area, began a volume at 21:41 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.

Tornado Watch 76Apr 1, 9:00 PM EDT

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.7 hours before the alert went out and 143 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: 118 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

Issued	Product	Office	Counties	Lasted
Apr 1, 2:48 PM EDT	Tornado Watch	SPC	Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 8 more	6 hr
Apr 1, 7:35 PM EDT	Mesoscale Discussion	SPC	Columbia, Franklin, Gulf, Hamilton, Jefferson, Lafayette and 6 more	85 min
Mar 31, 8:09 PM EDT	Mesoscale Discussion	SPC	Brooks, Colquitt, Cook, Decatur, Grady, Lowndes and 3 more	96 min
Mar 31, 8:41 PM EDT	Mesoscale Discussion	SPC	Barrow, Bartow, Butts, Carroll, Catoosa, Chattahoochee and 42 more	94 min
Mar 31, 9:14 PM EDT	Tornado Watch	SPC	Banks, Barrow, Bartow, Bibb, Butts, Carroll and 65 more	18 hr
Mar 31, 11:11 PM EDT	Mesoscale Discussion	SPC	Bartow, Bibb, Butts, Carroll, Catoosa, Chattahoochee and 43 more	64 min
Apr 1, 1:31 AM EDT	Mesoscale Discussion	SPC	Baldwin, Bleckley, Burke, Columbia, Dodge, Elbert and 18 more	89 min
Apr 1, 3:03 AM EDT	Mesoscale Discussion	SPC	Chattahoochee, Harris, Marion, Muscogee, Stewart	57 min
Apr 1, 5:46 AM EDT	Mesoscale Discussion	SPC	Calhoun, Chattahoochee, Clay, Crisp, Dooly, Dougherty and 17 more	89 min
Apr 1, 7:26 AM EDT	Tornado Watch	SPC	Baker, Baldwin, Ben Hill, Bibb, Bleckley, Bryan and 54 more	12 hr
Apr 1, 11:40 AM EDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 69 more	2 hr
Apr 1, 2:00 PM EDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 54 more	60 min

Nearby

Mesoscale Discussions in Georgia, 2016 Mesoscale Discussions in South Carolina, 2016 Mesoscale Discussions in Florida, 2016 Every mesoscale discussion in 2016

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.