Alert archive / South Dakota / Tornado Warnings in 1998

Tornado Warning 7, NWS Aberdeen, SD

June 24, 1998McPherson County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 24, 1998, 9:20 PM CDT for McPherson County, South Dakota. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 24, 1998, 9:20 PM CDT (02:20 UTC)
Expired
Jun 24, 1998, 10:10 PM CDT
In force
50 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County McPherson County, SD

The radar

The Aberdeen radar (KABR), 72 km from the middle of the area, began a volume at 02:22 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 24, 4:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.3 hours before the alert went out and 116 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 1998-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6538 joules per kilogram.LCLEL10008507005003002001001 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 1998-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
6538 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
857 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
1.1
Supercell composite
5.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

231 
WFUS1 KABR 250221 RRA
TORABR
SDC089-250310-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
920 PM CDT WED JUN 24 1998

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN MCPHERSON COUNTY IN NORTHEASTERN SOUTH DAKOTA

* UNTIL 1010 PM CDT

* AT 919 PM CDT... ABERDEEN DOPPLER RADAR INDICATED A TORNADO 44
  MILES NORTHWEST OF ABERDEEN OR 8 MILES NORTHWEST OF LONG LAKE
  MOVING SOUTHEAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...
  LONG LAKE            AT 930 PM CDT
  SPRING CREEK COLONY  AT 945 PM CDT
IF YOU ARE IN A BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.

CB/KH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 8:54 PM CDTSevere Thunderstorm WarningABRMcPherson26 min
Jun 24, 9:53 PM CDTSevere Thunderstorm WarningABRStanley32 min
Jun 24, 10:10 PM CDTSevere Thunderstorm WarningABRMcPherson45 min
Jun 24, 10:19 PM CDTSevere Thunderstorm WarningABRHamlin46 min
Jun 24, 10:25 PM CDTSevere Thunderstorm WarningABRDeuel50 min
Jun 24, 10:30 PM CDTSevere Thunderstorm WarningABRDewey65 min
Jun 24, 10:55 PM CDTSevere Thunderstorm WarningABRBrown50 min
Jun 24, 11:03 PM CDTSevere Thunderstorm WarningABREdmunds32 min
Jun 24, 11:23 PM CDTSevere Thunderstorm WarningABRFaulk27 min

Nearby

Tornado Warnings in South Dakota, 1998Every tornado warning in 1998Tornadoes in 1998

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; radar from the NEXRAD Level II archive.