Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 15, NWS Des Moines, IA

April 24, 1989Winnebago County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 24, 1989, 2:51 PM CDT for Winnebago County, Iowa. It was in force for 54 min.

The area

The counties it named.

The facts

Issued: Apr 24, 1989, 2:51 PM CDT (19:51 UTC)
Expired: Apr 24, 1989, 3:45 PM CDT
In force: 54 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Winnebago 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

Minneapolis, MN (KSTC), launched 12:00Z, 7.9 hours before the alert went out and 164 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: 1304 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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, Apr 24, 9:54 AM CDT, 4 hours 57 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
950 AM CDT MON APR 24 1989

AT 930 AM...A VERY STRONG THUNDERSTORM HAD DEVELOPED OVER NORTHWEST
IOWA NEAR CHEROKEE...40 MILES NORTHEST OF SIOUX CITY.  PEA TO MARBLE
SIZE HAIL HAS BEEN REPORTED WITH THIS STORM IN THE COMMUNITY OF
CHEROKEE.  HEAVY RAINS ARE ALSO POSSIBLE WITH THIS STORM.  THIS STORM
WAS PART OF A SYSTEM OF SCATTERED THUNDERSTORMS AND SHOWERS OVER
NORTHWEST...NORTH CENTRAL...AND NORTHEAST IOWA.  MOST OF THE SHOWERS
WERE NORTH OF A CHEROKEE TO MASON CITY LINE.

THE STRONG STORM WAS MOVING NORTHEAST AT 10 MILES AN HOUR WHILE THE
SHOWERS WERE MOVING EAST AT 10 MILES AN HOUR.

MILLER

Special weather statement, Apr 24, 12:26 PM CDT, 2 hours 25 minutes before

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Local storm report, Apr 24, 12:44 PM CDT, 2 hours 7 minutes before

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Special weather statement, Apr 24, 12:47 PM CDT, 2 hours 4 minutes before

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Special weather statement, Apr 24, 1:42 PM CDT, 1 hour 9 minutes before

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    <section class="card" role="status" aria-live="polite">
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      <p id="message1">
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Local storm report, Apr 24, 1:44 PM CDT, 1 hour 7 minutes before

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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
Apr 24, 11:03 AM CDT	Severe Thunderstorm Warning	DMX	Clay	42 min
Apr 24, 11:48 AM CDT	Severe Thunderstorm Warning	DMX	Clay	32 min
Apr 24, 2:33 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	42 min

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.