Alert archive / South Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 71, NWS Sioux Falls, SD

July 31, 1993Brookings County, Lake County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 31, 1993, 6:16 AM CDT for Brookings County, Lake County, South Dakota. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1993, 6:16 AM CDT (11:16 UTC)
Expired
Jul 31, 1993, 6:45 AM CDT
In force
29 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Brookings County, SD, Lake County, SD

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 11.3 hours before the alert went out and 276 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 00:00Z on 1993-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1153 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 00:00Z on 1993-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
1153 J/kg
Mixed-layer CIN
-243 J/kg
Mixed-layer LCL
1041 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
246 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
Jul 31, 6:41 AM CDTSevere Thunderstorm WarningFSDMoody34 min
Jul 31, 6:41 AM CDTSevere Thunderstorm WarningFSDLincoln34 min
Jul 31, 7:03 AM CDTSevere Thunderstorm WarningFSDPipestone27 min
Jul 31, 7:21 AM CDTSevere Thunderstorm WarningFSDLyon, Murray39 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.