Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 289

April 4, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2014, 7:00 AM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2014, 7:00 AM CDT (12:00 UTC)
Expired
Apr 4, 2014, 8:30 AM CDT
In force
90 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 44 counties

Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Elmore County, AL, Randolph County, AL, Talladega County, AL, Tallapoosa County, AL, Bartow County, GA, Carroll County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dawson County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Heard County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Macon County, NC, Swain County, NC, Blount County, TN, Cocke County, TN, Greene County, TN, Jefferson County, TN, Monroe County, TN, Polk County, TN, Sevier County, TN

The radar

The Atlanta radar (KFFC), 99 km from the middle of the area, began a volume at 12:02 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

Nashville Metro, TN (KBNA), launched 12:00Z, 0.0 hours before the alert went out and 261 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, Nashville Metro, TN at 12:00Z on 2014-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Nashville Metro, TN at 12:00Z on 2014-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1263 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 4, 2:29 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 9 more31 min
Apr 4, 2:52 AM CDTTornado WatchSPCBlount, Colbert, Cullman, DeKalb, Fayette, Franklin and 17 more5 hr
Apr 4, 5:28 AM CDTMesoscale DiscussionSPCBibb, Blount, Cullman, DeKalb, Etowah, Fayette and 16 more92 min
Apr 4, 10:12 AM CDTMesoscale DiscussionSPCSumter63 min
Apr 3, 8:16 PM CDTMesoscale DiscussionSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 3 more59 min
Apr 3, 8:30 PM CDTTornado WatchSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 2 more7 hr
Apr 3, 10:45 PM CDTMesoscale DiscussionSPCChester, Fayette, Hardeman, Haywood, Madison, Shelby and 1 more60 min
Apr 3, 11:40 PM CDTMesoscale DiscussionSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 2 more95 min
Apr 4, 12:40 AM CDTTornado WatchSPCChester, Decatur, Fayette, Hardeman, Hardin, Haywood and 5 more5 hr
Apr 4, 1:39 AM CDTMesoscale DiscussionSPCCheatham, Davidson, Dickson, Houston, Humphreys, Macon and 6 more3 hr
Apr 4, 2:12 AM CDTMesoscale DiscussionSPCDyer, Gibson, Henry, Obion, Stewart, Weakley63 min
Apr 4, 3:45 AM CDTMesoscale DiscussionSPCChester, Hardeman, Hardin, Henderson, McNairy60 min
Apr 4, 4:42 AM CDTMesoscale DiscussionSPCCampbell, Clay, Fentress, Jackson, Macon, Morgan and 7 more93 min
Apr 4, 4:58 AM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Campbell, Claiborne, Hamilton, Hancock and 8 more5 hr
Apr 4, 7:41 AM CDTMesoscale DiscussionSPCAnderson, Campbell, Claiborne, Meigs, Morgan, Rhea and 3 more49 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Tennessee, 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.