Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 164, NWS Des Moines, IA

August 8, 1994Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 8, 1994, 12:08 AM CDT for Crawford County, Iowa. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1994, 12:08 AM CDT (05:08 UTC)
Expired
Aug 8, 1994, 12:50 AM CDT
In force
42 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Crawford County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.1 hours before the alert went out and 114 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 1994-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4693 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 1994-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
4693 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
892 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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
Aug 7, 9:26 PM CDTSevere Thunderstorm WarningDMXWinnebago64 min
Aug 7, 10:26 PM CDTSevere Thunderstorm WarningDMXHancock51 min
Aug 7, 10:33 PM CDTSevere Thunderstorm WarningDMXKossuth35 min
Aug 7, 10:35 PM CDTSevere Thunderstorm WarningDMXWinnebago25 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.