Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 178, NWS Des Moines, IA

August 25, 1994Humboldt County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 25, 1994, 6:00 PM CDT for Humboldt County, Iowa. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Aug 25, 1994, 6:00 PM CDT (23:00 UTC)
Expired
Aug 25, 1994, 6:30 PM CDT
In force
30 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Humboldt County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.0 hours before the alert went out and 236 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 1994-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1334 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, Minneapolis, MN at 12:00Z on 1994-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
1334 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
1348 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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
Aug 25, 12:45 PM CDTSevere Thunderstorm WarningDMXGrundy45 min
Aug 25, 1:17 PM CDTSevere Thunderstorm WarningDMXButler41 min
Aug 25, 1:17 PM CDTSevere Thunderstorm WarningDMXBlack Hawk58 min
Aug 25, 2:56 PM CDTSevere Thunderstorm WarningDMXBlack Hawk49 min
Aug 25, 6:00 PM CDTSevere Thunderstorm WarningDMXGreene, Webster30 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.