Alert archive / South Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 50, NWS Sioux Falls, SD

June 19, 1991McCook County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 19, 1991, 3:50 PM CDT for McCook County, South Dakota. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 19, 1991, 3:50 PM CDT (20:50 UTC)
Expired
Jun 19, 1991, 4:15 PM CDT
In force
25 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County McCook County, SD

What was reported inside it

TimeReportWhereRemark
Jun 19, 4:00 PM CDTHail 1Mccook, SD

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 8.8 hours before the alert went out and 159 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 12:00Z on 1991-06-19Temperature 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, Aberdeen, SD at 12:00Z on 1991-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1735 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
116 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 4:21 PM CDTSevere Thunderstorm WarningFSDMcCook39 min
Jun 19, 6:17 PM CDTSevere Thunderstorm WarningFSDMcCook28 min
Jun 19, 6:33 PM CDTSevere Thunderstorm WarningFSDMinnehaha57 min
Jun 19, 6:41 PM CDTSevere Thunderstorm WarningFSDMcCook49 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.