Alert archive / North Carolina / Mesoscale Discussions in 2023

Mesoscale Discussion 375

March 27, 202317 counties in North Carolina; Cherokee County, Spartanburg County, York County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2023, 2:30 PM EDT for 17 counties in North Carolina; Cherokee County, Spartanburg County, York County, South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 27, 2023, 2:30 PM EDT (18:30 UTC)
Expired: Mar 27, 2023, 4:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 5%

Counties Alamance County, NC, Cabarrus County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Randolph County, NC, Rowan County, NC, Stanly County, NC, Union County, NC, Cherokee County, SC, Spartanburg County, SC, York County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.5 hours before the alert went out and 317 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: 529 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 971 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.3

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
Mar 26, 11:59 PM EDT	Mesoscale Discussion	SPC	Aiken, Calhoun, Clarendon, Edgefield, Fairfield, Florence and 12 more	2 hr
Mar 27, 11:02 AM EDT	Severe Thunderstorm Watch	SPC	Beaufort, Hampton, Jasper	7 hr
Mar 27, 1:13 PM EDT	Mesoscale Discussion	SPC	Jasper	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2023 Mesoscale Discussions in South Carolina, 2023 Every mesoscale discussion in 2023

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.