Alert archive / South Carolina / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 103, NWS Greenville-Spartanburg, SC

May 17, 2025Henderson County, Transylvania County, North Carolina; Greenville County, Pickens County, Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 17, 2025, 5:51 AM EDT for Henderson County, Transylvania County, North Carolina; Greenville County, Pickens County, Spartanburg County, South 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 counties it named.

The facts

Issued: May 17, 2025, 5:51 AM EDT (09:51 UTC)
Expired: May 17, 2025, 6:30 AM EDT
In force: 39 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Henderson County, NC, Transylvania County, NC, Greenville County, SC, Pickens County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 09:54 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 17, 4:35 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.9 hours before the alert went out and 264 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: 1148 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 7.2

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 May 17, 5:35 AM EDT, 16 minutes earlier.

Area forecast discussion, May 17, 5:35 AM EDT, 16 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, May 17, 4:54 AM 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>

In the hours before

Special weather statement, May 17, 4:59 AM EDT, 52 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, May 17, 5:03 AM EDT, 48 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, May 17, 5:12 AM EDT, 39 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, May 17, 5:21 AM EDT, 30 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, May 17, 5:25 AM EDT, 26 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, May 17, 5:34 AM EDT, 17 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
May 17, 2:56 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Madison, Yancey	64 min
May 17, 3:15 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Swain	60 min
May 17, 3:18 AM EDT	Special Weather Statement	GSP	Avery, Mitchell	42 min
May 17, 3:42 AM EDT	Severe Thunderstorm Warning	GSP	Avery, Buncombe, Burke, Haywood, McDowell, Mitchell and 1 more	48 min
May 17, 3:52 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Haywood, Jackson, Macon, Swain	68 min
May 17, 4:09 AM EDT	Severe Thunderstorm Warning	GSP	Avery, Burke, Caldwell, McDowell, Mitchell	28 min
May 17, 4:16 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Swain	44 min
May 17, 4:23 AM EDT	Special Weather Statement	GSP	Burke, Catawba, McDowell, Rutherford	37 min
May 17, 4:31 AM EDT	Special Weather Statement	GSP	Henderson	44 min
May 17, 4:35 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Henderson, Polk	25 min
May 17, 4:40 AM EDT	Severe Thunderstorm Warning	GSP	Haywood, Henderson, Jackson, Transylvania	35 min
May 17, 4:43 AM EDT	Tornado Warning	GSP	Haywood, Henderson, Jackson, Transylvania	34 min
May 17, 4:55 AM EDT	Special Weather Statement	GSP	Davie	50 min
May 17, 4:59 AM EDT	Special Weather Statement	GSP	Macon	31 min
May 17, 5:06 AM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk, Transylvania	39 min
May 17, 5:21 AM EDT	Special Weather Statement	GSP	Transylvania	24 min
May 17, 5:28 AM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk, Rutherford	32 min
May 17, 5:34 AM EDT	Special Weather Statement	GSP	Macon	26 min
May 17, 6:01 AM EDT	Special Weather Statement	GSP	Cleveland, Gaston, Lincoln	44 min
May 17, 6:15 AM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Gaston, Iredell, Lincoln, Mecklenburg	45 min
May 17, 6:26 AM EDT	Severe Thunderstorm Warning	GSP	Polk, Rutherford	22 min
May 17, 7:16 AM EDT	Special Weather Statement	GSP	Rowan	29 min
May 17, 9:01 AM EDT	Special Weather Statement	GSP	Union	29 min
May 17, 6:08 AM EDT	Special Weather Statement	GSP	Oconee	37 min
May 17, 7:35 AM EDT	Special Weather Statement	GSP	Anderson	25 min
May 17, 8:31 AM EDT	Special Weather Statement	GSP	Laurens	29 min
May 17, 8:46 AM EDT	Severe Thunderstorm Warning	GSP	Laurens, Union	44 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2025 Severe Thunderstorm Warnings in North Carolina, 2025 Every severe thunderstorm warning in 2025

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.