Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 9, NWS Des Moines, IA

April 22, 1989Hardin County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 22, 1989, 1:29 PM CDT for Hardin County, Iowa. It was in force for 16 min.

The area

The counties it named.

The facts

Issued
Apr 22, 1989, 1:29 PM CDT (18:29 UTC)
Expired
Apr 22, 1989, 1:45 PM CDT
In force
16 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Hardin 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

Minneapolis, MN (KSTC), launched 12:00Z, 6.5 hours before the alert went out and 276 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, Minneapolis, MN at 12:00Z on 1989-04-22Temperature 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, Minneapolis, MN at 12:00Z on 1989-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 372 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1102 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
372 m²/s²
0-3 km storm-relative helicity
285 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
Apr 22, 6:26 AM CDTSevere Thunderstorm WarningDMXBoone, Hamilton, Story49 min
Apr 22, 9:05 AM CDTSevere Thunderstorm WarningDMXKossuth, Winnebago25 min
Apr 22, 9:41 AM CDTSevere Thunderstorm WarningDMXKossuth34 min
Apr 22, 10:28 AM CDTSevere Thunderstorm WarningDMXWright30 min
Apr 22, 10:35 AM CDTTornado WarningDMXHumboldt23 min
Apr 22, 10:52 AM CDTSevere Thunderstorm WarningDMXHumboldt, Webster, Wright38 min
Apr 22, 11:30 AM CDTSevere Thunderstorm WarningDMXHamilton, Webster30 min
Apr 22, 12:00 PM CDTSevere Thunderstorm WarningDMXBoone30 min
Apr 22, 1:29 PM CDTSevere Thunderstorm WarningDMXMarshall, Story31 min
Apr 22, 2:00 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall25 min
Apr 22, 2:13 PM CDTSevere Thunderstorm WarningDMXGrundy57 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.