Alert archive / South Dakota / Tornado Warnings in 1998

Tornado Warning 6, NWS Aberdeen, SD

June 17, 1998Lyman County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 17, 1998, 9:31 PM CDT for Lyman County, South Dakota. It was in force for 34 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 17, 1998, 9:31 PM CDT (02:31 UTC)
Expired
Jun 17, 1998, 10:05 PM CDT
In force
34 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Lyman County, SD

The radar

The Aberdeen radar (KABR), 207 km from the middle of the area, began a volume at 02:30 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.5 hours before the alert went out and 160 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 1998-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 339 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 1998-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 256 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
339 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
256 m²/s²
0-3 km storm-relative helicity
372 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

277 
WFUS1 KABR 180230 RRA
TORABR
SDC085-180305-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
931 PM CDT WED JUN 17 1998

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN LYMAN COUNTY IN CENTRAL SOUTH DAKOTA

* UNTIL 1005 PM CDT

* AT 929 PM CDT... ABERDEEN DOPPLER RADAR INDICATED A TORNADO 13
  MILES WEST OF CHAMBERLAIN OR 10 MILES WEST OF OACOMA MOVING EAST
  AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  RELIANCE             AT 935 PM CDT
  OACOMA               AT 940 PM CDT

IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR
ROOM AWAY FROM WINDOWS.

MM/KH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 8:39 PM CDTSevere Thunderstorm WarningABRLyman51 min
Jun 17, 8:55 PM CDTSevere Thunderstorm WarningABRHand, Hyde50 min
Jun 17, 9:50 PM CDTSevere Thunderstorm WarningABRHand, Hyde60 min
Jun 17, 10:57 PM CDTSevere Thunderstorm WarningABRFaulk58 min
Jun 17, 11:31 PM CDTSevere Thunderstorm WarningABREdmunds49 min
Jun 17, 11:42 PM CDTSevere Thunderstorm WarningABRBrown63 min
Jun 17, 11:47 PM CDTSevere Thunderstorm WarningABRSpink63 min
Jun 18, 1:23 AM CDTSevere Thunderstorm WarningABRRoberts62 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.