Alert archive / South Dakota / Severe Thunderstorm Warnings in 1988

Severe Thunderstorm Warning 11, NWS Sioux Falls, SD

May 20, 1988Hanson County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 20, 1988, 4:28 PM CDT for Hanson County, South Dakota. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
May 20, 1988, 4:28 PM CDT (21:28 UTC)
Expired
May 20, 1988, 5:30 PM CDT
In force
62 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Hanson County, SD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.5 hours before the alert went out and 286 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 1988-05-20Temperature 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 1988-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.1939Sfc1 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
3586 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
41 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 Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 3:33 PM CDTSevere Thunderstorm WarningFSDHutchinson, Yankton57 min
May 20, 3:52 PM CDTSevere Thunderstorm WarningFSDClay, Yankton38 min
May 20, 4:28 PM CDTSevere Thunderstorm WarningFSDClay, Hutchinson, McCook, Turner, Yankton62 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1988Every severe thunderstorm warning in 1988

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.