Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 14, NWS Des Moines, IA

May 14, 1993Johnson County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 14, 1993, 8:27 PM CDT for Johnson County, Iowa. It was in force for 18 min.

The area

The counties it named.

The facts

Issued: May 14, 1993, 8:27 PM CDT (01:27 UTC)
Expired: May 14, 1993, 8:45 PM CDT
In force: 18 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Johnson County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 400 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: 267 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1802 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -87 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

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, May 14, 6:42 PM CDT, 1 hour 45 minutes before

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Special weather statement, May 14, 6:48 PM CDT, 1 hour 39 minutes before

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Special weather statement, May 14, 6:49 PM CDT, 1 hour 38 minutes before

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Special weather statement, May 14, 6:49 PM CDT, 1 hour 38 minutes before

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Special weather statement, May 14, 6:54 PM CDT, 1 hour 33 minutes before

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Special weather statement, May 14, 6:55 PM CDT, 1 hour 32 minutes before

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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.