Alert archive / South Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 199, NWS Rapid City, SD

July 21, 2000Jackson County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 21, 2000, 3:25 PM MDT for Jackson County, South Dakota. It was in force for 50 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: Jul 21, 2000, 3:25 PM MDT (21:25 UTC)
Expired: Jul 21, 2000, 4:15 PM MDT
In force: 50 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Jackson County, SD

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.4 hours before the alert went out and 109 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: 131 J/kg
Mixed-layer CIN: -210 J/kg
Mixed-layer LCL: 1456 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jul 21, 3:00 PM MDT, 25 minutes earlier.

Area forecast discussion, Jul 21, 3:00 PM MDT, 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>

In the hours before

Special weather statement, Jul 21, 10:00 AM MDT, 5 hours 25 minutes before

SDZ001-002-012>014-024>032-041>044-046-047-049-WYZ054>058-212130-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
1000 AM MDT FRI JUL 21 2000

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING...

A WEAK UPPER LEVEL DISTURBANCE WILL INTERACT WITH UNSTABLE AIR OVER
NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA TO CREATE A SLIGHT
RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. THE MAIN
THREAT FROM ANY STORMS THAT BECOME SEVERE WILL BE LARGE HAIL AND
DAMAGING WIND GUSTS.

GR

Local storm report, Jul 21, 1:49 PM MDT, 1 hour 36 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
Jul 21, 11:37 AM MDT	Severe Thunderstorm Warning	UNR	Mellette	53 min
Jul 21, 12:25 PM MDT	Tornado Warning	UNR	Mellette	35 min
Jul 21, 12:26 PM MDT	Severe Thunderstorm Warning	UNR	Custer	19 min
Jul 21, 12:38 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	52 min
Jul 21, 12:45 PM MDT	Severe Thunderstorm Warning	UNR	Custer	15 min
Jul 21, 12:51 PM MDT	Severe Thunderstorm Warning	UNR	Todd, Tripp	54 min
Jul 21, 1:00 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	30 min
Jul 21, 1:29 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	61 min
Jul 21, 1:42 PM MDT	Severe Thunderstorm Warning	UNR	Todd	63 min
Jul 21, 2:28 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	62 min
Jul 21, 2:44 PM MDT	Severe Thunderstorm Warning	UNR	Todd	31 min
Jul 21, 3:20 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	40 min
Jul 21, 3:57 PM MDT	Severe Thunderstorm Warning	UNR	Butte	48 min
Jul 21, 4:27 PM MDT	Severe Thunderstorm Warning	UNR	Meade	63 min
Jul 21, 5:00 PM MDT	Severe Thunderstorm Warning	UNR	Fall River	45 min
Jul 21, 4:09 PM MDT	Severe Thunderstorm Warning	UNR	Campbell, Crook	51 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2000 Every severe thunderstorm warning in 2000

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.