Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 105, NWS Des Moines, IA

June 13, 1994Boone County, Dallas County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 13, 1994, 12:54 AM CDT for Boone County, Dallas County, Iowa. It was in force for 21 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1994, 12:54 AM CDT (05:54 UTC)
Expired
Jun 13, 1994, 1:15 AM CDT
In force
21 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Boone County, IA, Dallas County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.9 hours before the alert went out and 207 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 1994-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4262 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 1994-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
4262 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1255 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
514 m²/s²
Significant tornado parameter
4.3
Supercell composite
35.1

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, Jun 12, 11:40 PM CDT, 1 hour 14 minutes before
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Local storm report, Jun 12, 11:51 PM CDT, 1 hour 3 minutes before
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Local storm report, Jun 12, 11:53 PM CDT, 1 hour 1 minute before
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Special weather statement, Jun 13, 12:32 AM CDT, 22 minutes before
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Special weather statement, Jun 13, 12:33 AM CDT, 21 minutes before
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Special weather statement, Jun 13, 12:40 AM CDT, 14 minutes before
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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 7:08 PM CDTTornado WarningDMXDickinson37 min
Jun 12, 7:15 PM CDTSevere Thunderstorm WarningDMXEmmet30 min
Jun 12, 7:45 PM CDTSevere Thunderstorm WarningDMXClay, Dickinson30 min
Jun 12, 8:15 PM CDTSevere Thunderstorm WarningDMXClay, Palo Alto30 min
Jun 12, 8:25 PM CDTTornado WarningDMXPalo Alto35 min
Jun 12, 8:55 PM CDTSevere Thunderstorm WarningDMXHumboldt, Kossuth35 min
Jun 12, 9:26 PM CDTSevere Thunderstorm WarningDMXHumboldt34 min
Jun 12, 9:37 PM CDTSevere Thunderstorm WarningDMXWebster38 min
Jun 12, 9:41 PM CDTTornado WarningDMXWright34 min
Jun 12, 9:56 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin34 min
Jun 12, 10:14 PM CDTSevere Thunderstorm WarningDMXHamilton31 min
Jun 12, 10:58 PM CDTSevere Thunderstorm WarningDMXBlack Hawk47 min
Jun 12, 11:31 PM CDTSevere Thunderstorm WarningDMXFayette29 min
Jun 12, 11:38 PM CDTSevere Thunderstorm WarningDMXCarroll22 min
Jun 13, 12:10 AM CDTSevere Thunderstorm WarningDMXAdams14 min
Jun 13, 1:03 AM CDTSevere Thunderstorm WarningDMXMarion28 min
Jun 13, 1:03 AM CDTSevere Thunderstorm WarningDMXPoweshiek28 min
Jun 13, 1:19 AM CDTSevere Thunderstorm WarningDMXMahaska26 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994Every 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.