Alert archive / Iowa / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 61, NWS Des Moines, IA

July 8, 1992Webster County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 8, 1992, 1:00 AM CDT for Webster County, Iowa. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1992, 1:00 AM CDT (06:00 UTC)
Expired
Jul 8, 1992, 1:45 AM CDT
In force
45 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Webster County, IA

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 6.0 hours before the alert went out and 219 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 1992-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2090 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 1992-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
2090 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1219 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

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
Jul 8, 12:31 AM CDTSevere Thunderstorm WarningDMXCalhoun44 min
Jul 8, 1:13 PM CDTSevere Thunderstorm WarningDMXMahaska, Monroe21 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992

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.