Alert archive / South Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 154, NWS Greenville-Spartanburg, SC

June 22, 20204 counties in South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 22, 2020, 3:37 PM EDT for 4 counties in South Carolina. It was in force for 38 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 22, 2020, 3:37 PM EDT (19:37 UTC)
Expired
Jun 22, 2020, 4:15 PM EDT
In force
38 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Anderson County, SC, Greenville County, SC, Laurens County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 20 km from the middle of the area, began a volume at 19:39 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.6 hours before the alert went out and 255 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, Peachtre/Fal Fld, GA at 12:00Z on 2020-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 536 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, Peachtre/Fal Fld, GA at 12:00Z on 2020-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.1939Sfc1 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
536 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
994 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
98 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 22, 2:55 PM EDT, 42 minutes earlier.

Area forecast discussion, Jun 22, 2:55 PM EDT, 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, Jun 22, 6:31 AM EDT, 9 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
631 AM EDT Mon Jun 22 2020

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-231045-
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-
631 AM EDT Mon Jun 22 2020

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

.DAY ONE...Today and tonight.

Isolated to scattered thunderstorms are expected to develop again
this afternoon and persist into the evening. A few of the storms
will produce severe weather, in the form of damaging wind gusts and
large hail. Any thunderstorm will be capable of heavy downpours and
cloud-to-ground lightning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

8

In the hours before

Special weather statement, Jun 22, 3:00 PM EDT, 37 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 22, 3:16 PM EDT, 21 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 22, 3:17 PM EDT, 20 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 22, 3:30 PM EDT, 7 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 22, 3:34 PM EDT, 3 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 22, 3:35 PM EDT, 2 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, 9:09 PM EDTSevere Thunderstorm WarningGSPAlexander, Burke, Caldwell51 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, 3:39 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 South 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.