Alert archive / South Dakota / Tornado Warnings in 1998

Tornado Warning 2, NWS Aberdeen, SD

May 30, 1998Hand County, South Dakota

NWS Aberdeen, SD issued this tornado warning at May 30, 1998, 6:39 PM CDT for Hand County, South Dakota. It was in force for 51 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: May 30, 1998, 6:39 PM CDT (23:39 UTC)
Expired: May 30, 1998, 7:30 PM CDT
In force: 51 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Hand County, SD

The radar

The Aberdeen radar (KABR), 111 km from the middle of the area, began a volume at 23:40 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

Time	Report	Where	Remark
May 30, 6:50 PM CDT	Hail 3	St Lawrence, 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 30, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.7 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 781 J/kg
Mixed-layer CIN: -281 J/kg
Mixed-layer LCL: 851 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KABR 302339 RRA
TORABR
SDC059-310030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
639 PM CDT SAT MAY 30 1998

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN HAND COUNTY IN CENTRAL SOUTH DAKOTA

* UNTIL 730 PM CDT

* AT 638 PM CDT... ABERDEEN DOPPLER RADAR INDICATED A TORNADO 46
  MILES NORTHWEST OF HURON OR 6 MILES EAST OF POLO MOVING EAST AT 30
  MPH.

* THE TORNADO WILL BE dREMAIN IN RURAL AREAS.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

TDK/LVQ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 3:24 AM CDT	Severe Thunderstorm Warning	ABR	Marshall	61 min
May 30, 3:43 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	62 min
May 30, 6:08 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	62 min
May 30, 6:25 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	60 min
May 30, 6:57 PM CDT	Tornado Warning	ABR	Spink	33 min

Nearby

Tornado Warnings in South Dakota, 1998 Every tornado warning in 1998 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.