Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 221, NWS Aberdeen, SD

September 8, 1997Clark County, Day County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Sep 8, 1997, 10:30 AM CDT for Clark County, Day County, South Dakota. It was in force for 50 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
Sep 8, 1997, 10:30 AM CDT (15:30 UTC)
Expired
Sep 8, 1997, 11:20 AM CDT
In force
50 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Clark County, SD, Day County, SD

What was reported inside it

TimeReportWhereRemark
Sep 8, 10:50 AM CDTHail 1Webster, 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 3.5 hours before the alert went out and 62 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 1997-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1740 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, Aberdeen, SD at 12:00Z on 1997-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.193958Sfc1 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
1740 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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 Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 8, 11:15 AM CDTSevere Thunderstorm WarningABRCodington45 min
Sep 8, 11:21 AM CDTSevere Thunderstorm WarningABRSpink49 min
Sep 8, 11:42 AM CDTSevere Thunderstorm WarningABRClark48 min
Sep 8, 12:10 PM CDTSevere Thunderstorm WarningABRHamlin60 min
Sep 8, 3:06 PM CDTSevere Thunderstorm WarningABRLyman34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997Every severe thunderstorm warning in 1997

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.