Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 37, NWS Des Moines, IA

May 4, 1994Clay County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 4, 1994, 3:21 PM CDT for Clay County, Iowa. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
May 4, 1994, 3:21 PM CDT (20:21 UTC)
Expired
May 4, 1994, 4:00 PM CDT
In force
39 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Clay County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.4 hours before the alert went out and 220 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 1994-05-04Temperature 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 1994-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.193958Sfc1 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
962 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
107 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
May 4, 3:13 PM CDTTornado WarningDMXEmmet32 min
May 4, 3:27 PM CDTSevere Thunderstorm WarningDMXPocahontas36 min
May 4, 3:57 PM CDTSevere Thunderstorm WarningDMXBuena Vista48 min
May 4, 5:19 PM CDTSevere Thunderstorm WarningDMXCalhoun33 min
May 4, 6:31 PM CDTSevere Thunderstorm WarningDMXGuthrie29 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.