Alert archive / South Dakota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 113, NWS Rapid City, SD

June 17, 2008Mellette County, Todd County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 17, 2008, 7:47 AM CDT for Mellette County, Todd County, South Dakota. It was in force for 58 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 17, 2008, 7:47 AM CDT (12:47 UTC)
Expired: Jun 17, 2008, 8:45 AM CDT
In force: 58 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon

Counties Mellette County, SD, Todd County, SD

The radar

The North Platte radar (KLNX), 159 km from the middle of the area, began a volume at 12:46 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

Rapid City, SD (KUNR), launched 12:00Z, 0.8 hours before the alert went out and 188 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: 430 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 1117 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 4:15 AM CDT, 3 hours 32 minutes earlier.

Area forecast discussion, Jun 17, 4:15 AM CDT, 3 hours 32 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 17, 6:30 AM CDT, 1 hour 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 Rapid City, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 8:06 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	54 min
Jun 17, 12:54 AM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence	66 min
Jun 17, 8:46 AM CDT	Severe Thunderstorm Warning	UNR	Todd, Tripp	59 min
Jun 17, 3:26 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	49 min
Jun 17, 4:01 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	30 min
Jun 17, 4:12 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	63 min
Jun 17, 4:49 PM CDT	Severe Thunderstorm Warning	UNR	Custer	27 min
Jun 17, 5:11 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	79 min
Jun 17, 5:15 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence	60 min
Jun 17, 5:34 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Pennington	56 min
Jun 17, 5:40 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	50 min
Jun 17, 5:57 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Pennington	44 min
Jun 17, 6:08 PM CDT	Tornado Warning	UNR	Lawrence, Pennington	25 min
Jun 17, 6:15 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	60 min
Jun 17, 6:28 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	62 min
Jun 17, 6:50 PM CDT	Tornado Warning	UNR	Custer, Fall River	40 min
Jun 17, 12:00 AM CDT	Severe Thunderstorm Warning	UNR	Campbell, Crook	60 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2008 Every severe thunderstorm warning in 2008

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.