Alert archive / North Carolina / Special Weather Statements in 2020

Special Weather Statement, NWS Raleigh, NC

July 20, 2020Johnston County, North Carolina

NWS Raleigh, NC issued this special weather statement at Jul 20, 2020, 6:21 PM EDT for Johnston County, North Carolina. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2020, 6:21 PM EDT (22:21 UTC)
Expired: Jul 20, 2020, 7:00 PM EDT
In force: 39 min
Issued by: NWS Raleigh, NC

County Johnston County, NC

The radar

The Raleigh/Durham radar (KRAX), 26 km from the middle of the area, began a volume at 22:25 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

Roanoke, VA (KRNK), launched 12:00Z, 10.4 hours before the alert went out and 207 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: 456 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 933 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: -1 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>

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 3:49 AM EDT	Excessive Heat Warning	RAH	Cumberland, Edgecombe, Halifax, Harnett, Hoke, Johnston and 5 more	17 hr
Jul 20, 3:23 PM EDT	Heat Advisory	RAH	Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 25 more	30 hr
Jul 20, 3:27 PM EDT	Special Weather Statement	RAH	Guilford	48 min
Jul 20, 3:40 PM EDT	Severe Thunderstorm Warning	RAH	Guilford	25 min
Jul 20, 3:52 PM EDT	Areal Flood Advisory	RAH	Guilford	77 min
Jul 20, 4:33 PM EDT	Special Weather Statement	RAH	Anson, Moore, Richmond	57 min
Jul 20, 5:05 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Moore, Richmond, Scotland	40 min
Jul 20, 5:14 PM EDT	Special Weather Statement	RAH	Franklin	61 min
Jul 20, 5:47 PM EDT	Special Weather Statement	RAH	Hoke, Montgomery, Moore, Richmond, Scotland	58 min
Jul 20, 6:34 PM EDT	Special Weather Statement	RAH	Harnett	56 min
Jul 20, 6:56 PM EDT	Special Weather Statement	RAH	Wayne	34 min
Jul 20, 7:45 PM EDT	Areal Flood Advisory	RAH	Wayne	2 hr

Nearby

Special Weather Statements in North Carolina, 2020 Every special weather statement in 2020

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.