Alert archive / South Dakota / Tornado Warnings in 1990

Tornado Warning 7, NWS Sioux Falls, SD

June 16, 1990Union County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 16, 1990, 5:56 PM CDT for Union County, South Dakota. It was in force for 34 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 16, 1990, 5:56 PM CDT (22:56 UTC)
Expired: Jun 16, 1990, 6:30 PM CDT
In force: 34 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Union 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 16, 6:15 PM CDT	Tornado F1	Union, 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

Omaha, NE (KOAX), launched 12:00Z, 10.9 hours before the alert went out and 170 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3656 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 237 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 KSUX 162257
TORSUX
SDC127-162330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
556 PM CDT SAT JUN 16 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 625 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE SOUTHEAST PART OF SOUTH DAKOTA
      NORTHERN UNION

AT 5:52 PM RADAR INDICATED A TORNADO 5 MILES SOUTHWEST OF
BERESFORD SOUTH DAKOTA. THE STORM WAS MOVING NORTHEAST AT 35 MPH.
THE STORM WILL MOVE BETWEEN BERESFORD AND ALCESTER BY 6:10 PM CDT.

IF YOU LIVE IN NORTHERN UNION COUNTY SOUTH DAKOTA THEN YOU SHOULD
MOVE TO A PLACE OF SAFETY IMMEDIATELY.

THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY. IF YOU ARE IN A
STRONG BUILDING GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR. AVOID
WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR
GET INTO A DITCH OR DEPRESSION...COVER YOUR HEAD WITH YOUR HANDS.

ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORTS OF
SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

HOPPES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 9:29 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	46 min
Jun 15, 10:27 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	33 min
Jun 15, 10:59 PM CDT	Severe Thunderstorm Warning	FSD	McCook	31 min
Jun 15, 11:35 PM CDT	Severe Thunderstorm Warning	FSD	Lake	25 min
Jun 16, 1:23 PM CDT	Severe Thunderstorm Warning	FSD	Mellette	52 min
Jun 16, 4:31 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	29 min
Jun 16, 5:21 PM CDT	Severe Thunderstorm Warning	FSD	Clay	39 min
Jun 16, 5:46 PM CDT	Tornado Warning	FSD	Clay, Lincoln	29 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.