Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 49, NWS Omaha, NE

July 6, 1994Pottawattamie County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jul 6, 1994, 12:24 AM CDT for Pottawattamie County, Iowa. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1994, 12:24 AM CDT (05:24 UTC)
Expired
Jul 6, 1994, 1:30 AM CDT
In force
66 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Pottawattamie County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.4 hours before the alert went out and 69 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 1994-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3368 joules per kilogram.LCLEL10008507005003002001001 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 1994-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
3368 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1281 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.8
Supercell composite
8.0

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.

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 10:37 PM CDTSevere Thunderstorm WarningOAXDodge38 min
Jul 6, 12:03 AM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy57 min
Jul 6, 12:03 AM CDTSevere Thunderstorm WarningOAXWashington57 min
Jul 6, 12:09 AM CDTSevere Thunderstorm WarningOAXSaunders36 min
Jul 6, 12:24 AM CDTSevere Thunderstorm WarningOAXCass66 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.