Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 40, NWS Des Moines, IA

June 7, 1993Hamilton County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 7, 1993, 4:50 PM CDT for Hamilton County, Iowa. It was in force for 40 min.

The area

The counties it named.

The facts

Issued: Jun 7, 1993, 4:50 PM CDT (21:50 UTC)
Expired: Jun 7, 1993, 5:30 PM CDT
In force: 40 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Hamilton County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.8 hours before the alert went out and 250 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: 2453 J/kg
Mixed-layer CIN: -268 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 506 m²/s²
0-3 km storm-relative helicity: 464 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, Jun 7, 3:56 PM CDT, 54 minutes before

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Special weather statement, Jun 7, 3:57 PM CDT, 53 minutes before

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Special weather statement, Jun 7, 4:27 PM CDT, 23 minutes before

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Special weather statement, Jun 7, 4:30 PM CDT, 20 minutes before

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Special weather statement, Jun 7, 4:48 PM CDT, 2 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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Special weather statement, Jun 7, 4:49 PM CDT, 1 minute 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
Jun 7, 4:15 AM CDT	Severe Thunderstorm Warning	DMX	Dickinson	45 min
Jun 7, 5:08 AM CDT	Severe Thunderstorm Warning	DMX	Clay	52 min
Jun 7, 5:38 AM CDT	Severe Thunderstorm Warning	DMX	Carroll	37 min
Jun 7, 6:06 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun	39 min
Jun 7, 6:27 AM CDT	Severe Thunderstorm Warning	DMX	Greene, Webster	48 min
Jun 7, 7:18 AM CDT	Severe Thunderstorm Warning	DMX	Hamilton	27 min
Jun 7, 7:52 AM CDT	Severe Thunderstorm Warning	DMX	Hardin	38 min
Jun 7, 8:12 AM CDT	Severe Thunderstorm Warning	DMX	Grundy	33 min
Jun 7, 8:29 AM CDT	Severe Thunderstorm Warning	DMX	Adair	31 min
Jun 7, 8:45 AM CDT	Severe Thunderstorm Warning	DMX	Grundy	30 min
Jun 7, 8:52 AM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison	38 min
Jun 7, 9:20 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	25 min
Jun 7, 9:55 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek, Wapello	35 min
Jun 7, 9:55 AM CDT	Severe Thunderstorm Warning	DMX	Tama	35 min
Jun 7, 10:38 AM CDT	Severe Thunderstorm Warning	DMX	Jefferson	37 min
Jun 7, 3:28 PM CDT	Severe Thunderstorm Warning	DMX	Dickinson	32 min
Jun 7, 5:09 PM CDT	Flash Flood Warning	DMX	Hamilton	3 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 1993 Every severe thunderstorm warning in 1993

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.