Alert archive / South Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 47, NWS Sioux Falls, SD

June 9, 1991Mellette County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 9, 1991, 7:08 PM CDT for Mellette County, South Dakota. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Jun 9, 1991, 7:08 PM CDT (00:08 UTC)
Expired
Jun 9, 1991, 8:00 PM CDT
In force
52 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Mellette County, SD

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 0.1 hours before the alert went out and 179 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, Rapid City, SD at 00:00Z on 1991-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 140 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, Rapid City, SD at 00:00Z on 1991-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -113 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
140 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1423 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-113 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-1.9

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.

Nearby

Severe Thunderstorm Warnings in South Dakota, 1991Every severe thunderstorm warning in 1991

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.