Alert archive / South Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 11, NWS Sioux Falls, SD

June 4, 1994Mellette County, Todd County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 4, 1994, 9:45 PM CDT for Mellette County, Todd County, South Dakota. It was in force for 45 min.

The area

The counties it named.

The facts

Issued: Jun 4, 1994, 9:45 PM CDT (02:45 UTC)
Expired: Jun 4, 1994, 10:30 PM CDT
In force: 45 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Mellette County, SD, Todd County, SD

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 2.8 hours before the alert went out and 188 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 148 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 2411 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 4, 9:02 PM CDT, 43 minutes before

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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 10:32 PM CDT	Severe Thunderstorm Warning	FSD	Mellette, Todd	39 min
Jun 4, 10:58 PM CDT	Severe Thunderstorm Warning	FSD	Brule	32 min
Jun 4, 11:46 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	59 min
Jun 5, 1:28 AM CDT	Severe Thunderstorm Warning	FSD	Turner, Yankton	47 min
Jun 4, 11:02 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	43 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1994 Every severe thunderstorm warning in 1994

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.