Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 124, NWS Des Moines, IA

July 1, 1994Audubon County, Cass County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 1, 1994, 5:47 PM CDT for Audubon County, Cass County, Iowa. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Jul 1, 1994, 5:47 PM CDT (22:47 UTC)
Expired
Jul 1, 1994, 6:15 PM CDT
In force
28 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Audubon County, IA, Cass County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 123 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 12:00Z on 1994-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1691 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 12:00Z on 1994-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
1691 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1310 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 10:23 PM CDTSevere Thunderstorm WarningDMXDickinson52 min
Jun 30, 10:57 PM CDTSevere Thunderstorm WarningDMXWinnebago48 min
Jun 30, 10:57 PM CDTSevere Thunderstorm WarningDMXWorth29 min
Jun 30, 11:03 PM CDTSevere Thunderstorm WarningDMXClay42 min
Jul 1, 5:55 PM CDTSevere Thunderstorm WarningDMXCass35 min
Jul 1, 6:17 PM CDTSevere Thunderstorm WarningDMXAdair28 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.