Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 114, NWS Des Moines, IA

June 30, 1993Cass County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 30, 1993, 3:01 PM CDT for Cass County, Iowa. It was in force for 29 min.

The area

The counties it named.

The facts

Issued: Jun 30, 1993, 3:01 PM CDT (20:01 UTC)
Expired: Jun 30, 1993, 3:30 PM CDT
In force: 29 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Cass County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 120 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: 1925 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -2.0

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, Jun 30, 12:45 PM CDT, 2 hours 16 minutes before

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Special weather statement, Jun 30, 12:48 PM CDT, 2 hours 13 minutes before

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Special weather statement, Jun 30, 1:47 PM CDT, 1 hour 14 minutes before

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Special weather statement, Jun 30, 1:48 PM CDT, 1 hour 13 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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      <p id="message2">
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Special weather statement, Jun 30, 2:40 PM CDT, 21 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.
      </p>
      <p id="message2">
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jun 30, 2:40 PM CDT, 21 minutes before

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<head>
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<body>
  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 29, 7:05 PM CDT	Tornado Warning	DMX	Humboldt, Pocahontas	25 min
Jun 29, 7:18 PM CDT	Flash Flood Warning	DMX	Kossuth, Palo Alto, Pocahontas	3 hr
Jun 29, 7:26 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago	24 min
Jun 29, 7:27 PM CDT	Severe Thunderstorm Warning	DMX	Webster	33 min
Jun 29, 7:34 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt	26 min
Jun 29, 8:01 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Humboldt, Webster, Wright	29 min
Jun 29, 8:17 PM CDT	Tornado Warning	DMX	Calhoun, Greene	28 min
Jun 29, 8:23 PM CDT	Severe Thunderstorm Warning	DMX	Butler	52 min
Jun 29, 8:38 PM CDT	Severe Thunderstorm Warning	DMX	Boone	37 min
Jun 29, 8:44 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Grundy	46 min
Jun 29, 8:44 PM CDT	Tornado Warning	DMX	Calhoun	31 min
Jun 29, 8:50 PM CDT	Tornado Warning	DMX	Boone, Greene	25 min
Jun 29, 8:53 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Story	52 min
Jun 29, 8:57 PM CDT	Tornado Warning	DMX	Crawford	33 min
Jun 29, 9:01 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Sac	29 min
Jun 29, 9:20 PM CDT	Tornado Warning	DMX	Jasper, Polk, Story	25 min
Jun 29, 9:25 PM CDT	Severe Thunderstorm Warning	DMX	Buchanan, Fayette	65 min
Jun 29, 9:28 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	32 min
Jun 29, 9:36 PM CDT	Severe Thunderstorm Warning	DMX	Benton, Tama	54 min
Jun 29, 9:37 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Jasper, Polk	68 min
Jun 29, 9:49 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	26 min
Jun 29, 10:00 PM CDT	Tornado Warning	DMX	Jasper, Polk	26 min
Jun 29, 10:15 PM CDT	Flash Flood Warning	DMX	Boone	96 min
Jun 30, 12:21 AM CDT	Flash Flood Warning	DMX	Decatur, Ringgold	66 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.