Alert archive / Iowa / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 98, NWS Des Moines, IA

July 14, 1987Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 14, 1987, 7:25 PM CDT for Crawford County, Iowa. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Jul 14, 1987, 7:25 PM CDT (00:25 UTC)
Expired: Jul 14, 1987, 8:00 PM CDT
In force: 35 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Crawford 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, 0.4 hours before the alert went out and 114 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: 3552 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 205 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, Jul 14, 5:50 PM CDT, 1 hour 35 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WATERLOO IA
550 PM CDT TUE JUL 14 1987

TIME          EVENT

440 PM CDT   EXTREME HEAVY RAIN AND 3/4 INCH HAIL CAUSED EXTENSIVE
 (APPROX.)   CROP DAMAGE, STRIPPING THE CORN STALKS COMPLETELY, SOUTH
             OF GRAFTON IN WORTH COUNTY AND NEAR PLYMOUTH IN MITCHELL
             COUNTY. GOLF BALL-SIZED WAS ALSO ESTIMATED AS BEING 2
             INCHES DEEP ON THE HIGHWAY.

453 PM CDT   3/4 INCH HAIL...40 MPH WINDS AND HEAVY RAIN OCCURRED 15
 (APPROX.)   MILES WEST OF OSAGE, IA IN MITCHELL COUNTY.

HEITKAMP

Special weather statement, Jul 14, 6:10 PM CDT, 1 hour 15 minutes before

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Local storm report, Jul 14, 6:20 PM CDT, 1 hour 5 minutes before

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Special weather statement, Jul 14, 6:32 PM CDT, 53 minutes before

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Special weather statement, Jul 14, 6:45 PM CDT, 40 minutes before

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      <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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Special weather statement, Jul 14, 7:07 PM CDT, 18 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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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
Jul 14, 9:00 PM CDT	Tornado Warning	DMX	Buchanan	30 min
Jul 14, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Adams	35 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1987 Every severe thunderstorm warning in 1987

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.