Alert archive / Iowa / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 304, NWS Des Moines, IA

October 14, 1998Hardin County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Oct 14, 1998, 6:58 PM CDT for Hardin County, Iowa. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 14, 1998, 6:58 PM CDT (23:58 UTC)
Expired: Oct 14, 1998, 7:30 PM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Hardin County, IA

The radar

The Des Moines radar (KDMX), 83 km from the middle of the area, began a volume at 00:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 12.0 hours before the alert went out and 242 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1560 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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

Local storm report, Oct 14, 2:27 PM CDT, 4 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
227 PM CDT WED OCT 14 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0110 PM    5 SW MANSON               IA   .75 INCH HAIL
10/14/98   CALHOUN                        MOSTLY MARBLE SIZE WITH A
                                          FEW THREE QUARTER INCH
                                          STONES

Local storm report, Oct 14, 6:02 PM CDT, 56 minutes before

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Local storm report, Oct 14, 6:02 PM CDT, 56 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 Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 14, 1:24 PM CDT	Severe Thunderstorm Warning	DMX	Webster	31 min
Oct 14, 1:26 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	34 min
Oct 14, 3:49 PM CDT	Tornado Warning	DMX	Marshall	16 min
Oct 14, 4:18 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	32 min
Oct 14, 4:51 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Tama	34 min
Oct 14, 5:21 PM CDT	Severe Thunderstorm Warning	DMX	Tama	34 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1998 Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.