Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 100, NWS Des Moines, IA

July 11, 1989Greene County, Guthrie County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 11, 1989, 1:36 PM CDT for Greene County, Guthrie County, Iowa. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Jul 11, 1989, 1:36 PM CDT (18:36 UTC)
Expired
Jul 11, 1989, 2:45 PM CDT
In force
69 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Greene County, IA, Guthrie County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.6 hours before the alert went out and 171 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 1989-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1989-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -96 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3634 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-96 m²/s²
0-3 km storm-relative helicity
-53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 7:54 PM CDTSevere Thunderstorm WarningDMXMarshall51 min
Jul 10, 8:06 PM CDTSevere Thunderstorm WarningDMXStory54 min
Jul 10, 8:54 PM CDTSevere Thunderstorm WarningDMXDickinson51 min
Jul 11, 2:12 PM CDTSevere Thunderstorm WarningDMXDallas48 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1989Every severe thunderstorm warning in 1989

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.