Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 1994

December 24, 201419 counties in Florida; 49 counties in Georgia; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Dec 24, 2014, 8:50 AM EST for 19 counties in Florida; 49 counties in Georgia; 11 counties in South Carolina. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Dec 24, 2014, 8:50 AM EST (13:50 UTC)
Expired
Dec 24, 2014, 10:45 AM EST
In force
115 min
Issued by
the Storm Prediction Center
All 79 counties

Baker County, FL, Bradford County, FL, Columbia County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Dodge County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Jenkins County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC, Orangeburg County, SC

The radar

The Moody AFB radar (KVAX), 117 km from the middle of the area, began a volume at 13:49 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

Jacksonville, FL (KJAX), launched 12:00Z, 1.8 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-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2014-12-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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, Jacksonville, FL at 12:00Z on 2014-12-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 405 square meters per square second.1939587897Sfc1 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
10 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
1009 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
405 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Dec 23, 8:03 PM ESTMesoscale DiscussionSPCBay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more87 min
Dec 23, 11:22 PM ESTMesoscale DiscussionSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more53 min
Dec 23, 11:55 PM ESTTornado WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 13 more9 hr
Dec 24, 3:10 AM ESTMesoscale DiscussionSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 13 more2 hr
Dec 24, 5:02 AM ESTMesoscale DiscussionSPCBaker, Bay, Calhoun, Columbia, Dixie, Franklin and 16 more118 min
Dec 24, 6:32 AM ESTTornado WatchSPCBaker, Bay, Calhoun, Columbia, Dixie, Franklin and 13 more7 hr
Dec 24, 10:42 AM ESTMesoscale DiscussionSPCGeorgetown, Horry, Marion, Williamsburg63 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Florida, 2014Mesoscale Discussions in South Carolina, 2014Every mesoscale discussion in 2014

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.