Alert archive / North Carolina / Winter Storm Warnings in 2023

Winter Storm Warning 1, NWS Greenville-Spartanburg, SC

January 12, 20237 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this winter storm warning at Jan 12, 2023, 3:40 AM EST for 7 counties in North Carolina. It took effect at Jan 13, 2023, 12:00 AM EST. It was in force for 37 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 12, 2023, 3:40 AM EST (08:40 UTC)
In effect from: Jan 13, 2023, 12:00 AM EST
Expired: Jan 14, 2023, 1:00 PM EST
In force: 37 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Avery County, NC, Graham County, NC, Haywood County, NC, Madison County, NC, Mitchell County, NC, Swain County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 73 km from the middle of the area, began a volume at 08:41 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 00:00Z, 8.7 hours before the alert went out and 308 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: 36 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 949 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 402 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at Jan 12, 3:32 AM EST, 8 minutes earlier.

Area forecast discussion, Jan 12, 3:32 AM EST, 8 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, Jan 11, 3:28 PM EST, 12 hours 12 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
Jan 12, 3:40 AM EST	Winter Weather Advisory	GSP	Avery, Buncombe, Graham, Haywood, Jackson, Macon and 4 more	57 hr
Jan 12, 12:50 PM EST	Special Weather Statement	GSP	Graham, Swain	40 min
Jan 12, 1:31 PM EST	Special Weather Statement	GSP	Graham, Haywood, Swain	44 min
Jan 12, 1:44 PM EST	Severe Thunderstorm Warning Considerable damage threat	GSP	Avery, Buncombe, Haywood, Madison, Mitchell, Swain and 1 more	61 min
Jan 12, 2:48 PM EST	Special Weather Statement	GSP	Avery, Mitchell, Yancey	42 min
Jan 12, 3:15 PM EST	Special Weather Statement	GSP	Avery, Burke, Caldwell, McDowell	30 min
Jan 12, 3:37 PM EST	Special Weather Statement	GSP	Buncombe	38 min
Jan 12, 3:59 PM EST	Special Weather Statement	GSP	Henderson	46 min
Jan 12, 4:03 PM EST	Special Weather Statement	GSP	Burke, McDowell	27 min
Jan 12, 4:21 PM EST	Severe Thunderstorm Warning	GSP	Buncombe, Henderson, Polk, Rutherford	24 min
Jan 12, 4:30 PM EST	Special Weather Statement	GSP	Burke, Caldwell	30 min
Jan 12, 4:37 PM EST	Severe Thunderstorm Warning	GSP	Alexander, Burke, Caldwell, Catawba	38 min
Jan 12, 4:47 PM EST	Special Weather Statement	GSP	Rutherford	43 min
Jan 12, 5:09 PM EST	Severe Thunderstorm Warning	GSP	Alexander, Catawba, Iredell	36 min
Jan 12, 5:10 PM EST	Severe Thunderstorm Warning	GSP	Cleveland, Polk, Rutherford	50 min
Jan 12, 5:19 PM EST	Severe Thunderstorm Warning	GSP	Catawba, Iredell, Lincoln	26 min
Jan 12, 5:32 PM EST	Severe Thunderstorm Warning	GSP	Cleveland, Gaston, Lincoln	58 min
Jan 12, 5:48 PM EST	Severe Thunderstorm Warning	GSP	Catawba, Iredell, Lincoln	42 min
Jan 12, 6:00 PM EST	Special Weather Statement	GSP	Davie	15 min
Jan 12, 6:10 PM EST	Tornado Warning	GSP	Gaston, Lincoln, Mecklenburg	35 min
Jan 12, 6:18 PM EST	Severe Thunderstorm Warning	GSP	Cabarrus, Catawba, Davie, Iredell, Rowan	42 min
Jan 12, 6:20 PM EST	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	55 min
Jan 12, 6:28 PM EST	Severe Thunderstorm Warning	GSP	Cabarrus, Gaston, Mecklenburg	62 min
Jan 12, 6:58 PM EST	Severe Thunderstorm Warning	GSP	Rowan	32 min
Jan 12, 6:59 PM EST	Severe Thunderstorm Warning	GSP	Union	61 min
Jan 12, 3:25 PM EST	Severe Thunderstorm Warning	GSP	Oconee	50 min
Jan 12, 4:06 PM EST	Special Weather Statement	GSP	Pickens	24 min
Jan 12, 4:12 PM EST	Special Weather Statement	GSP	Oconee	33 min
Jan 12, 4:12 PM EST	Special Weather Statement	GSP	Spartanburg	33 min
Jan 12, 4:32 PM EST	Special Weather Statement	GSP	Greenville, Pickens	28 min
Jan 12, 4:39 PM EST	Severe Thunderstorm Warning	GSP	Anderson, Greenville, Pickens, Spartanburg	66 min
Jan 12, 5:16 PM EST	Special Weather Statement	GSP	Laurens	29 min
Jan 12, 5:27 PM EST	Special Weather Statement	GSP	Anderson	33 min
Jan 12, 5:39 PM EST	Tornado Warning	GSP	Laurens	15 min
Jan 12, 5:42 PM EST	Severe Thunderstorm Warning	GSP	Cherokee, Chester, Laurens, Spartanburg, Union, York	63 min
Jan 12, 5:51 PM EST	Special Weather Statement	GSP	Abbeville	24 min
Jan 12, 6:03 PM EST	Severe Thunderstorm Warning	GSP	Abbeville, Greenwood, Laurens	42 min
Jan 12, 6:20 PM EST	Tornado Warning	GSP	Abbeville, Greenwood, Laurens, Union	40 min
Jan 12, 6:32 PM EST	Severe Thunderstorm Warning	GSP	Chester, Greenwood, Laurens, Union	28 min
Jan 12, 3:19 PM EST	Special Weather Statement	GSP	Rabun	26 min
Jan 12, 4:52 PM EST	Special Weather Statement	GSP	Franklin, Hart	23 min

Nearby

Winter Storm Warnings in North Carolina, 2023 Every winter storm warning in 2023

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.