Alert archive / South Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 60, NWS Sioux Falls, SD

July 10, 1993Douglas County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 10, 1993, 7:15 PM CDT for Douglas County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Jul 10, 1993, 7:15 PM CDT (00:15 UTC)
Expired: Jul 10, 1993, 7:50 PM CDT
In force: 35 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Douglas County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.3 hours before the alert went out and 282 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: 3233 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.1

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.

In the hours before

Special weather statement, Jul 10, 1:47 PM CDT, 5 hours 28 minutes before

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Special weather statement, Jul 10, 1:47 PM CDT, 5 hours 28 minutes before

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Special weather statement, Jul 10, 2:54 PM CDT, 4 hours 21 minutes before

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Special weather statement, Jul 10, 2:54 PM CDT, 4 hours 21 minutes before

<!doctype html>
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<head>
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    <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">
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Special weather statement, Jul 10, 6:50 PM CDT, 25 minutes before

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<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.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 7:15 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	60 min
Jul 10, 7:15 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	35 min
Jul 10, 11:31 PM CDT	Flash Flood Warning	FSD	Minnehaha	4 hr
Jul 10, 11:14 PM CDT	Flash Flood Warning	FSD	Nobles	5 hr
Jul 10, 11:28 PM CDT	Flash Flood Warning	FSD	Nobles	5 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 1993 Every severe thunderstorm warning in 1993

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.