Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 87, NWS Des Moines, IA

June 26, 1993Guthrie County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 1993, 8:48 PM CDT for Guthrie County, Iowa. It was in force for 27 min.

The area

The counties it named.

The facts

Issued: Jun 26, 1993, 8:48 PM CDT (01:48 UTC)
Expired: Jun 26, 1993, 9:15 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Guthrie County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.8 hours before the alert went out and 161 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: 911 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1826 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.7

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, Jun 26, 6:30 PM CDT, 2 hours 18 minutes before

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Special weather statement, Jun 26, 7:44 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jun 26, 7:45 PM CDT, 1 hour 3 minutes before

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Special weather statement, Jun 26, 7:50 PM CDT, 58 minutes before

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Special weather statement, Jun 26, 8:40 PM CDT, 8 minutes before

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Special weather statement, Jun 26, 8:40 PM CDT, 8 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
Jun 26, 8:22 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	36 min
Jun 26, 9:24 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	36 min
Jun 26, 9:39 PM CDT	Severe Thunderstorm Warning	DMX	Boone	25 min
Jun 27, 2:14 AM CDT	Flash Flood Warning	DMX	Johnson, Washington	3 hr
Jun 27, 3:36 AM CDT	Flash Flood Warning	DMX	Johnson, Washington	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.