Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 90, NWS Lincoln, IL

June 28, 1993DeKalb County, Lee County, Ogle County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 28, 1993, 2:42 AM CDT for DeKalb County, Lee County, Ogle County, Illinois. It was in force for 48 min.

The area

The counties it named.

The facts

Issued: Jun 28, 1993, 2:42 AM CDT (07:42 UTC)
Expired: Jun 28, 1993, 3:30 AM CDT
In force: 48 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties DeKalb County, IL, Lee County, IL, Ogle County, IL

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 7.7 hours before the alert went out and 470 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: 1440 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1291 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

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 27, 9:12 PM CDT, 5 hours 30 minutes before

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Special weather statement, Jun 27, 9:15 PM CDT, 5 hours 27 minutes before

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<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.
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        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 Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 28, 1:26 AM CDT	Severe Thunderstorm Warning	ILX	Carroll	49 min
Jun 28, 2:05 AM CDT	Severe Thunderstorm Warning	ILX	DeKalb, Ogle	40 min
Jun 28, 2:42 AM CDT	Severe Thunderstorm Warning	ILX	Carroll	48 min
Jun 28, 3:48 AM CDT	Severe Thunderstorm Warning	ILX	Lee	42 min
Jun 28, 4:10 AM CDT	Severe Thunderstorm Warning	ILX	Bureau	65 min
Jun 28, 9:35 AM CDT	Flash Flood Warning	ILX	McLean	3 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 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.