Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 112, NWS Aberdeen, SD

July 20, 1996Hughes County, Lyman County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 20, 1996, 7:01 PM CDT for Hughes County, Lyman County, South Dakota. It was in force for 64 min. 3 reports 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
Jul 20, 1996, 7:01 PM CDT (00:01 UTC)
Expired
Jul 20, 1996, 8:05 PM CDT
In force
64 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Hughes County, SD, Lyman County, SD

The radar

The Aberdeen radar (KABR), 188 km from the middle of the area, began a volume at 00:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 20, 7:20 PM CDTHail 0.75Pierre, SD
Jul 20, 7:20 PM CDTThunderstorm Wind 61Pierre, SD
Jul 20, 7:55 PM CDTHail 0.75Lower Brule, 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 00:00Z, 0.0 hours before the alert went out and 147 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 00:00Z on 1996-07-21Temperature 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, Aberdeen, SD at 00:00Z on 1996-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.1939587897Sfc1 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
-12 J/kg
Mixed-layer LCL
668 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
-16 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.4

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
Jul 20, 7:06 PM CDTTornado WarningABRSully49 min
Jul 20, 8:06 PM CDTSevere Thunderstorm WarningABRLyman59 min
Jul 21, 12:32 AM CDTSevere Thunderstorm WarningABRSully48 min
Jul 21, 1:00 AM CDTSevere Thunderstorm WarningABRBuffalo, Lyman30 min
Jul 21, 2:27 AM CDTSevere Thunderstorm WarningABRHyde, Sully43 min
Jul 21, 2:33 AM CDTSevere Thunderstorm WarningABRHughes32 min
Jul 21, 2:42 AM CDTSevere Thunderstorm WarningABRLyman48 min
Jul 21, 3:34 AM CDTSevere Thunderstorm WarningABRPotter31 min
Jul 21, 4:30 AM CDTFlash Flood WarningABRDewey, Stanley30 min
Jul 21, 4:30 AM CDTSevere Thunderstorm WarningABRDewey, Stanley30 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1996Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.