Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 144, NWS Des Moines, IA

September 7, 1989Audubon County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Sep 7, 1989, 10:40 PM CDT for Audubon County, Iowa. It was in force for 50 min.

The area

The counties it named.

The facts

Issued: Sep 7, 1989, 10:40 PM CDT (03:40 UTC)
Expired: Sep 7, 1989, 11:30 PM CDT
In force: 50 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Audubon County, IA

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

Omaha, NE (KOAX), launched 00:00Z, 3.7 hours before the alert went out and 128 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: 3627 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 221 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

Special weather statement, Sep 7, 6:46 PM CDT, 3 hours 54 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
640 PM CDT THU SEP 7 1989

AT 635 PM..AN INTENSE THUNDERSTORM..WITH VERY HEAVY RAINS..WAS LOCATED
IN CENTRAL IOWA JUST EAST OF MARSHALLTOWN...ABOUT 50 MILES NORTHEAST OF
DES MOINES.  VERY HEAVY RAINS...STRONG GUSTY SURFACE WINDS...AND HAIL
MAY ACCOMPANY THE PASSAGE OF THIS STORM.

SCATTERED SHOWERS AND THUNDERSHOWERS WERE ALSO FALLING ON MUCH OF THE
REMAINDER	 OF EAST CENTRAL IOWA.

THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE EAST AT 30 AN HOUR.

SCOTT

Special weather statement, Sep 7, 8:51 PM CDT, 1 hour 49 minutes before

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Special weather statement, Sep 7, 9:45 PM CDT, 55 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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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
Sep 7, 8:27 PM CDT	Tornado Warning	DMX	Crawford	33 min
Sep 8, 3:38 AM CDT	Flash Flood Warning	DMX	Audubon	4 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 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.