Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 129, NWS Des Moines, IA

July 5, 1994Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 5, 1994, 1:24 AM CDT for Crawford County, Iowa. It was in force for 36 min.

The area

The counties it named.

The facts

Issued: Jul 5, 1994, 1:24 AM CDT (06:24 UTC)
Expired: Jul 5, 1994, 2:00 AM CDT
In force: 36 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Crawford County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.4 hours before the alert went out and 114 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: 3643 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1098 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.9

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 4, 11:35 PM CDT, 1 hour 49 minutes before

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Special weather statement, Jul 4, 11:37 PM CDT, 1 hour 47 minutes before

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Special weather statement, Jul 5, 12:47 AM CDT, 37 minutes before

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<html lang="en">
<head>
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  <title>Service Notice</title>
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</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.
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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
Jul 5, 1:40 AM CDT	Severe Thunderstorm Warning	DMX	Buena Vista, Sac	50 min
Jul 5, 1:40 AM CDT	Severe Thunderstorm Warning	DMX	Clay	50 min
Jul 5, 2:19 AM CDT	Severe Thunderstorm Warning	DMX	Clay, Dickinson	26 min
Jul 5, 2:32 AM CDT	Severe Thunderstorm Warning	DMX	Emmet, Palo Alto	28 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994 Every severe thunderstorm warning in 1994

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.