Alert archive / South Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 67, NWS Sioux Falls, SD

July 22, 1993Bon Homme County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 22, 1993, 9:57 PM CDT for Bon Homme County, South Dakota. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Jul 22, 1993, 9:57 PM CDT (02:57 UTC)
Expired
Jul 22, 1993, 10:30 PM CDT
In force
33 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Bon Homme County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.0 hours before the alert went out and 224 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 1993-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2002 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 1993-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
2002 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
664 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.5

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 Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 7:42 PM CDTSevere Thunderstorm WarningFSDAurora33 min
Jul 22, 7:55 PM CDTSevere Thunderstorm WarningFSDBrule30 min
Jul 22, 8:21 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Douglas39 min
Jul 22, 8:23 PM CDTSevere Thunderstorm WarningFSDDavison52 min
Jul 22, 8:57 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Douglas33 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.