Alert archive / Georgia / Mesoscale Discussions in 2016

Mesoscale Discussion 1858

November 30, 20165 states

The Storm Prediction Center issued this mesoscale discussion at Nov 30, 2016, 1:55 PM CST for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 30, 2016, 1:55 PM CST (19:55 UTC)
Expired
Nov 30, 2016, 4:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 114 counties

Barbour County, AL, Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Russell County, AL, Calhoun County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Calhoun County, GA, Chattahoochee County, GA, Clarke County, GA, Clay County, GA, Clayton County, GA, Columbia County, GA, Crawford County, GA, Crisp County, GA, DeKalb County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Elbert County, GA, Fayette County, GA, Franklin County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Hart County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Jones County, GA, Lamar County, GA, Lee County, GA, Lincoln County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Miller County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Seminole County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Terrell County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wilkes County, GA, Wilkinson County, GA, Cleveland County, NC, Gaston County, NC, Polk County, NC, Rutherford County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Robins AFB radar (KJGX), 79 km from the middle of the area, began a volume at 19:56 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.9 hours before the alert went out and 109 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, Peachtre/Fal Fld, GA at 12:00Z on 2016-11-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 64 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, Peachtre/Fal Fld, GA at 12:00Z on 2016-11-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 278 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
64 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
278 m²/s²
0-3 km storm-relative helicity
274 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

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
Nov 29, 6:43 PM CSTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 6 more92 min
Nov 29, 6:47 PM CSTTornado WatchSPCCullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more8 hr
Nov 29, 8:03 PM CSTMesoscale DiscussionSPCChoctaw, Fayette, Greene, Hale, Lamar, Pickens and 2 more2 hr
Nov 29, 8:50 PM CSTTornado WatchSPCBibb, Blount, Fayette, Greene, Hale, Jefferson and 7 more8 hr
Nov 29, 9:28 PM CSTMesoscale DiscussionSPCCullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more62 min
Nov 29, 10:28 PM CSTTornado WatchSPCColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more5 hr
Nov 29, 11:17 PM CSTMesoscale DiscussionSPCDeKalb, Jackson, Lawrence, Limestone, Madison, Morgan118 min
Nov 29, 11:37 PM CSTMesoscale DiscussionSPCFayette, Lamar, Pickens113 min
Nov 30, 1:07 AM CSTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Fayette, Jackson, Madison and 5 more53 min
Nov 30, 2:54 AM CSTTornado WatchSPCBibb, Blount, Calhoun, Cherokee, Chilton, Cleburne and 22 more7 hr
Nov 30, 4:57 AM CSTTornado WatchSPCChoctaw, Clarke, Mobile, Washington7 hr
Nov 30, 5:10 AM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Chilton, Clay and 27 more95 min
Nov 30, 9:00 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Blount, Bullock, Butler and 37 more2 hr
Nov 30, 11:06 AM CSTTornado WatchSPCBaldwin, Barbour, Bullock, Butler, Chambers, Coffee and 17 more6 hr
Nov 30, 12:59 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Coffee, Covington, Crenshaw, Dale and 7 more2 hr
Nov 30, 4:45 PM CSTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 2 more30 min
Nov 29, 10:11 PM CSTTornado WatchSPCCatoosa, Chattooga, Dade, Walker, Whitfield5 hr
Nov 30, 2:23 PM CSTSevere Thunderstorm WatchSPCBaldwin, Bibb, Bleckley, Columbia, Crisp, Dooly and 22 more3 hr
Nov 30, 4:43 PM CSTMesoscale DiscussionSPCColumbia, Elbert, Glascock, Hancock, Lincoln, McDuffie and 5 more92 min

Nearby

Mesoscale Discussions in Georgia, 2016Mesoscale Discussions in South Carolina, 2016Mesoscale Discussions in Alabama, 2016Every 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.