Alert archive / Indiana / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 150, NWS Indianapolis, IN

August 31, 1989Benton County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 31, 1989, 10:36 PM EST for Benton County, Indiana. It was in force for 39 min.

The area

The counties it named.

The facts

Issued: Aug 31, 1989, 10:36 PM EST (03:36 UTC)
Expired: Aug 31, 1989, 11:15 PM EST
In force: 39 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Benton County, IN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 3.6 hours before the alert went out and 193 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: 1983 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 584 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 386 m²/s²
0-3 km storm-relative helicity: 562 m²/s²
Significant tornado parameter: 4.9
Supercell composite: 28.5

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, Aug 31, 10:12 PM EST, 24 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>

Special weather statement, Aug 31, 10:31 PM EST, 5 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 Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 31, 9:23 PM EST	Severe Thunderstorm Warning	IND	Cass, White	37 min
Sep 1, 5:56 AM EST	Flash Flood Warning	IND	Delaware, Madison	2 hr
Sep 1, 5:56 AM EST	Severe Thunderstorm Warning	IND	Delaware, Madison	64 min
Sep 1, 6:14 AM EST	Severe Thunderstorm Warning	IND	Randolph	46 min
Sep 1, 8:02 AM EST	Flash Flood Warning	IND	White	118 min
Sep 1, 9:38 AM EST	Flash Flood Warning	IND	Brown	2 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 1989 Every severe thunderstorm warning in 1989

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.