Alert archive / Georgia / Mesoscale Discussions in 2022

Mesoscale Discussion 280

March 18, 202212 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2022, 2:55 PM EDT for 12 counties in Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Mar 18, 2022, 2:55 PM EDT (18:55 UTC)
Expired
Mar 18, 2022, 5:30 PM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 52

Counties Atkinson County, GA, Berrien County, GA, Brooks County, GA, Clinch County, GA, Colquitt County, GA, Cook County, GA, Echols County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Mitchell County, GA, Thomas County, GA

The radar

The Moody AFB radar (KVAX), 65 km from the middle of the area, began a volume at 18:54 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.9 hours before the alert went out and 96 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, Tallahassee Rgnl, FL at 12:00Z on 2022-03-18Temperature 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, Tallahassee Rgnl, FL at 12:00Z on 2022-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 square meters per square second.193958Sfc1 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
1606 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
168 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 18, 11:34 AM EDTMesoscale DiscussionSPCBaker, Clay, Early, Miller, Seminole86 min
Mar 18, 11:53 AM EDTTornado WatchSPCBaker, Calhoun, Clay, Decatur, Dougherty, Early and 6 more8 hr
Mar 18, 6:17 PM EDTMesoscale DiscussionSPCBaker, Decatur, Grady, Miller, Mitchell, Seminole and 1 more88 min

Nearby

Mesoscale Discussions in Georgia, 2022Every mesoscale discussion in 2022

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.