Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 19, NWS Des Moines, IA

April 15, 1994Black Hawk County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 15, 1994, 12:10 AM CDT for Black Hawk County, Iowa. It was in force for 21 min.

The area

The counties it named.

The facts

Issued: Apr 15, 1994, 12:10 AM CDT (05:10 UTC)
Expired: Apr 15, 1994, 12:31 AM CDT
In force: 21 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Black Hawk County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 5.2 hours before the alert went out and 284 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: 2199 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 178 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, Apr 14, 11:40 PM CDT, 30 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 14, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	31 min
Apr 14, 8:34 PM CDT	Severe Thunderstorm Warning	DMX	Cass	41 min
Apr 14, 9:04 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	41 min
Apr 14, 9:39 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall	36 min
Apr 14, 9:40 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	35 min
Apr 14, 9:44 PM CDT	Severe Thunderstorm Warning	DMX	Madison, Union	31 min
Apr 14, 9:47 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	43 min
Apr 14, 9:55 PM CDT	Severe Thunderstorm Warning	DMX	Polk	35 min
Apr 14, 10:08 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	52 min
Apr 14, 10:08 PM CDT	Tornado Warning	DMX	Adair	37 min
Apr 14, 10:24 PM CDT	Severe Thunderstorm Warning	DMX	Buchanan	51 min
Apr 14, 10:26 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	34 min
Apr 14, 10:27 PM CDT	Severe Thunderstorm Warning	DMX	Tama	48 min
Apr 14, 10:55 PM CDT	Severe Thunderstorm Warning	DMX	Story	35 min
Apr 14, 11:03 PM CDT	Tornado Warning	DMX	Story	27 min
Apr 14, 11:04 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	26 min
Apr 14, 11:23 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	19 min
Apr 14, 11:39 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	25 min
Apr 14, 11:47 PM CDT	Severe Thunderstorm Warning	DMX	Van Buren	28 min
Apr 15, 12:09 AM CDT	Severe Thunderstorm Warning	DMX	Linn	36 min
Apr 15, 12:15 AM CDT	Severe Thunderstorm Warning	DMX	Buchanan	29 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994 Every severe thunderstorm warning in 1994

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.