Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 166, NWS Des Moines, IA

July 25, 1993Adams County, Union County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 25, 1993, 1:24 AM CDT for Adams County, Union County, Iowa. It was in force for 26 min.

The area

The counties it named.

The facts

Issued
Jul 25, 1993, 1:24 AM CDT (06:24 UTC)
Expired
Jul 25, 1993, 1:50 AM CDT
In force
26 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Adams County, IA, Union County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.4 hours before the alert went out and 162 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 1993-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2494 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 1993-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
2494 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
292 m²/s²
Significant tornado parameter
3.0
Supercell composite
12.2

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 24, 9:58 PM CDTSevere Thunderstorm WarningDMXCass32 min
Jul 24, 10:25 PM CDTSevere Thunderstorm WarningDMXAdair, Guthrie35 min
Jul 24, 10:30 PM CDTSevere Thunderstorm WarningDMXAudubon30 min
Jul 24, 10:39 PM CDTSevere Thunderstorm WarningDMXDallas, Madison51 min
Jul 24, 10:53 PM CDTSevere Thunderstorm WarningDMXAdams37 min
Jul 24, 11:01 PM CDTSevere Thunderstorm WarningDMXBoone44 min
Jul 24, 11:17 PM CDTSevere Thunderstorm WarningDMXUnion28 min
Jul 24, 11:55 PM CDTSevere Thunderstorm WarningDMXPolk50 min
Jul 25, 2:01 AM CDTSevere Thunderstorm WarningDMXClarke29 min
Jul 25, 2:43 AM CDTSevere Thunderstorm WarningDMXWapello32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning in 1993

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.