Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 150, NWS Sioux Falls, SD

August 4, 1996Gregory County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 4, 1996, 9:33 PM CDT for Gregory County, South Dakota. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 4, 1996, 9:33 PM CDT (02:33 UTC)
Expired
Aug 4, 1996, 10:05 PM CDT
In force
32 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Gregory County, SD

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.6 hours before the alert went out and 200 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, Aberdeen, SD at 00:00Z on 1996-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2418 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, Aberdeen, SD at 00:00Z on 1996-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939587897Sfc1 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
2418 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1100 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.9

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
Aug 4, 8:21 PM CDTSevere Thunderstorm WarningFSDCharles Mix34 min
Aug 4, 8:42 PM CDTSevere Thunderstorm WarningFSDGregory48 min
Aug 4, 10:29 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Douglas46 min
Aug 4, 10:16 PM CDTFlash Flood WarningFSDIda119 min
Aug 4, 10:16 PM CDTFlash Flood WarningFSDIda104 min
Aug 4, 10:49 PM CDTSevere Thunderstorm WarningFSDIda16 min
Aug 5, 12:19 AM CDTSevere Thunderstorm WarningFSDWoodbury31 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1996Every severe thunderstorm warning in 1996

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.