Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 252, NWS Greenville-Spartanburg, SC

July 22, 2020Burke County, Caldwell County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 22, 2020, 2:45 PM EDT for Burke County, Caldwell County, North Carolina. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 22, 2020, 2:45 PM EDT (18:45 UTC)
Expired: Jul 22, 2020, 3:11 PM EDT
In force: 26 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Burke County, NC, Caldwell County, NC

The radar

The Greer radar (KGSP), 120 km from the middle of the area, began a volume at 18:46 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.8 hours before the alert went out and 157 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 5:03 PM EDT, 21 hours 42 minutes earlier.

Area forecast discussion, Jul 21, 5:03 PM EDT, 21 hours 42 minutes before

<!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>

Hazardous weather outlook, Jul 21, 2:56 PM EDT, 23 hours 49 minutes before

<!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 Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 8:26 PM EDT	Areal Flood Advisory	GSP	Gaston, Mecklenburg	116 min
Jul 21, 8:34 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	109 min
Jul 22, 1:54 PM EDT	Severe Thunderstorm Warning	GSP	Avery, Burke, Caldwell	51 min
Jul 22, 2:20 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk, Rutherford	40 min
Jul 22, 2:25 PM EDT	Special Weather Statement	GSP	Haywood	35 min
Jul 22, 2:55 PM EDT	Special Weather Statement	GSP	McDowell	35 min
Jul 22, 3:09 PM EDT	Special Weather Statement	GSP	Polk	36 min
Jul 22, 3:32 PM EDT	Special Weather Statement	GSP	Rutherford	28 min
Jul 22, 3:33 PM EDT	Special Weather Statement	GSP	McDowell	27 min
Jul 22, 3:38 PM EDT	Severe Thunderstorm Warning	GSP	McDowell, Rutherford	32 min
Jul 22, 4:00 PM EDT	Special Weather Statement	GSP	McDowell	30 min
Jul 22, 4:31 PM EDT	Special Weather Statement	GSP	Burke	29 min
Jul 22, 7:27 PM EDT	Special Weather Statement	GSP	Union	33 min
Jul 22, 2:30 PM EDT	Special Weather Statement	GSP	Oconee	30 min
Jul 22, 5:22 PM EDT	Special Weather Statement	GSP	Spartanburg	38 min
Jul 22, 6:08 PM EDT	Special Weather Statement	GSP	Spartanburg	37 min
Jul 22, 6:45 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Spartanburg	45 min
Jul 22, 7:20 PM EDT	Areal Flood Advisory	GSP	Greenville, Spartanburg	2 hr
Jul 22, 4:15 PM EDT	Special Weather Statement	GSP	Hart	30 min
Jul 22, 7:01 PM EDT	Special Weather Statement	GSP	Elbert	29 min
Jul 22, 7:59 PM EDT	Special Weather Statement	GSP	Habersham	31 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning 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.