Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 150, NWS Greenville-Spartanburg, SC

June 21, 2020Alexander County, Burke County, Caldwell County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 21, 2020, 9:09 PM EDT for Alexander County, Burke County, Caldwell County, North Carolina. It was in force for 51 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
Jun 21, 2020, 9:09 PM EDT (01:09 UTC)
Expired
Jun 21, 2020, 10:00 PM EDT
In force
51 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Alexander County, NC, Burke County, NC, Caldwell County, NC

The radar

The Greer radar (KGSP), 129 km from the middle of the area, began a volume at 01:11 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

Charleston AFB, SC (KCHS), launched 00:00Z, 1.2 hours before the alert went out and 357 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, Charleston AFB, SC at 00:00Z on 2020-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 268 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, Charleston AFB, SC at 00:00Z on 2020-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
268 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1479 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
71 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 Jun 21, 7:22 PM EDT, 1 hour 47 minutes earlier.

Area forecast discussion, Jun 21, 7:22 PM EDT, 1 hour 47 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, Jun 21, 4:57 PM EDT, 4 hours 12 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
457 PM EDT Sun Jun 21 2020

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-222100-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander-
Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-
Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union NC-
Caldwell Mountains-Greater Caldwell-Burke Mountains-Greater Burke-
McDowell Mountains-Eastern McDowell-Rutherford Mountains-
Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains-
Pickens Mountains-Greenville Mountains-Greater Oconee-
Greater Pickens-Greater Greenville-Spartanburg-Cherokee-York-
Anderson-Abbeville-Laurens-Union SC-Chester-Greenwood-
457 PM EDT Sun Jun 21 2020

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...Tonight.

Isolated to scattered thunderstorms will continue to develop into
the evening. Coverage of storms will be better across the mountains.
A few of the storms could become severe with damaging wind gusts and
large hail. Heavy downpours and cloud- to-ground lightning will
accompany many of the storms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Special weather statement, Jun 21, 7:40 PM EDT, 1 hour 29 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>
Special weather statement, Jun 21, 7:50 PM EDT, 1 hour 19 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>
Local storm report, Jun 21, 7:54 PM EDT, 1 hour 15 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>
Special weather statement, Jun 21, 8:12 PM EDT, 57 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>
Special weather statement, Jun 21, 8:18 PM EDT, 51 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>
Special weather statement, Jun 21, 8:44 PM EDT, 25 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.

IssuedProductOfficeCountiesLasted
Jun 21, 8:25 PM EDTSevere Thunderstorm WarningGSPAvery, Burke, Caldwell, McDowell50 min
Jun 21, 8:44 PM EDTSpecial Weather StatementGSPMadison31 min
Jun 21, 9:22 PM EDTSevere Thunderstorm WarningGSPPolk, Rutherford38 min
Jun 21, 9:54 PM EDTSpecial Weather StatementGSPRutherford36 min
Jun 21, 9:57 PM EDTSpecial Weather StatementGSPCatawba33 min
Jun 21, 10:17 PM EDTSpecial Weather StatementGSPRutherford28 min
Jun 21, 10:22 PM EDTSpecial Weather StatementGSPAlexander, Catawba38 min
Jun 21, 11:00 PM EDTSpecial Weather StatementGSPAlexander45 min
Jun 22, 1:30 PM EDTSpecial Weather StatementGSPTransylvania45 min
Jun 22, 2:29 PM EDTSpecial Weather StatementGSPMacon31 min
Jun 22, 2:31 PM EDTSpecial Weather StatementGSPTransylvania29 min
Jun 22, 2:45 PM EDTSpecial Weather StatementGSPHenderson30 min
Jun 22, 3:16 PM EDTSpecial Weather StatementGSPHenderson29 min
Jun 22, 3:17 PM EDTSpecial Weather StatementGSPPolk, Rutherford28 min
Jun 22, 4:05 PM EDTSpecial Weather StatementGSPCleveland25 min
Jun 22, 5:03 PM EDTSpecial Weather StatementGSPMacon27 min
Jun 22, 5:28 PM EDTSpecial Weather StatementGSPJackson, Macon32 min
Jun 22, 5:44 PM EDTSevere Thunderstorm WarningGSPCleveland, Gaston, Lincoln46 min
Jun 22, 6:23 PM EDTSevere Thunderstorm WarningGSPGaston, Iredell, Lincoln, Mecklenburg37 min
Jun 22, 6:48 PM EDTSevere Thunderstorm WarningGSPCabarrus, Iredell, Mecklenburg, Rowan54 min
Jun 22, 7:14 PM EDTSpecial Weather StatementGSPUnion31 min
Jun 21, 8:12 PM EDTSpecial Weather StatementGSPGreenville33 min
Jun 21, 8:18 PM EDTSpecial Weather StatementGSPPickens27 min
Jun 21, 8:37 PM EDTSevere Thunderstorm WarningGSPGreenville, Spartanburg53 min
Jun 21, 9:30 PM EDTSpecial Weather StatementGSPLaurens30 min
Jun 22, 12:53 PM EDTSpecial Weather StatementGSPPickens37 min
Jun 22, 1:34 PM EDTSpecial Weather StatementGSPOconee41 min
Jun 22, 2:20 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson40 min
Jun 22, 2:23 PM EDTSpecial Weather StatementGSPOconee, Pickens37 min
Jun 22, 2:55 PM EDTSpecial Weather StatementGSPAbbeville35 min
Jun 22, 3:03 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson, Greenville, Greenwood, Laurens42 min
Jun 22, 3:37 PM EDTSevere Thunderstorm WarningGSPAnderson, Greenville, Laurens, Spartanburg38 min
Jun 22, 3:39 PM EDTSpecial Weather StatementGSPGreenwood36 min
Jun 22, 4:09 PM EDTSpecial Weather StatementGSPLaurens, Spartanburg36 min
Jun 22, 4:32 PM EDTSpecial Weather StatementGSPOconee28 min
Jun 22, 4:45 PM EDTSpecial Weather StatementGSPUnion30 min
Jun 22, 4:47 PM EDTSpecial Weather StatementGSPPickens28 min
Jun 22, 5:14 PM EDTSpecial Weather StatementGSPPickens31 min
Jun 22, 5:18 PM EDTSpecial Weather StatementGSPUnion27 min
Jun 22, 6:16 PM EDTSpecial Weather StatementGSPAbbeville, Anderson29 min
Jun 22, 1:03 PM EDTSpecial Weather StatementGSPRabun42 min
Jun 22, 2:12 PM EDTSpecial Weather StatementGSPElbert33 min
Jun 22, 3:00 PM EDTSpecial Weather StatementGSPElbert30 min
Jun 22, 3:56 PM EDTSpecial Weather StatementGSPHart34 min
Jun 22, 4:00 PM EDTSpecial Weather StatementGSPHabersham30 min
Jun 22, 5:52 PM EDTSpecial Weather StatementGSPElbert, Hart23 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020Every 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.