Alert archive / South Dakota / Tornado Warnings in 1990

Tornado Warning 6, NWS Aberdeen, SD

June 11, 1990Campbell County, Corson County, Walworth County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 11, 1990, 6:36 PM CDT for Campbell County, Corson County, Walworth County, South Dakota. It was in force for 39 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: Jun 11, 1990, 6:36 PM CDT (23:36 UTC)
Expired: Jun 11, 1990, 7:15 PM CDT
In force: 39 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Campbell County, SD, Corson County, SD, Walworth County, SD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 11, 6:50 PM CDT	Thunderstorm Wind 52	Walworth, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.6 hours before the alert went out and 128 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: 1480 J/kg
Mixed-layer CIN: -277 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KABR 112336
TORABR
SDC031-021-129-120015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE ABERDEEN SD
636 PM CDT MON JUN 11 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF SOUTH DAKOTA
      SOUTHEAST CORSON...SOUTHWEST CAMPBELL...NORTHWEST WALWORTH

THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE WAKPALA AND
MPBRIDGE.

AT 533 PM MDT  A TORNADO WAS REPORTED 2 MILES SOUTH OF HIWAY
JUNCTION 12 AND 20 OR 7 MILES WEST NORTHWEST OF MOBRIDGE SOUTH
DAKOTA IN NORTH CENTRAL SOUTH DAKOTA MOVING EAST AT 15 MPH.

IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT
SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE
LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR
Ao REINFORCED BUILDING.

STUDNICKA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 5:28 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	62 min
Jun 11, 5:56 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley, Sully	64 min
Jun 11, 6:16 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	29 min
Jun 11, 6:30 PM CDT	Severe Thunderstorm Warning	ABR	Sully	30 min

Nearby

Tornado Warnings in South Dakota, 1990 Every tornado warning in 1990 Tornadoes in 1990

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.