Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 29, NWS Sioux Falls, SD

August 16, 1986Aurora County, Brule County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Aug 16, 1986, 9:10 PM CDT for Aurora County, Brule County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Aug 16, 1986, 9:10 PM CDT (02:10 UTC)
Expired: Aug 16, 1986, 9:45 PM CDT
In force: 35 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Aurora County, SD, Brule County, SD

The radar

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

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 2.2 hours before the alert went out and 136 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: 3044 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 507 m²/s²
Significant tornado parameter: 5.1
Supercell composite: 42.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 170210
TORFSD
SDC003-015-170245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
910 PM CDT SAT AUG 16 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTH CENTRAL SOUTH DAKOTA...EXTREME NORTHWEST AURORA AND EXTREME 
 NORTHEAST BRULE

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE BETWEEN SMITH
CREEK AND WHITE LAKE.

AT 905 PM CDT  RADAR INDICATED A POSSIBLE TORNADO 35 MILES WEST
NORTHWEST OF MITCHELL SOUTH DAKOTA.

AT 903 PM CDT  A FUNNEL CLOUD WAS REPORTED IN EXTREME NORTHEAST
BRULE COUNTY.

 *** OPTIONAL REMARKS  *** MOVEMENT WAS SOUTHEAST AT 25 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
A REINFORCED BUILDING.

ANDERSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 9:16 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook	59 min
Aug 16, 9:16 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	59 min
Aug 16, 9:16 PM CDT	Severe Thunderstorm Warning	FSD	Davison	59 min
Aug 16, 10:05 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Minnehaha	55 min
Aug 16, 10:05 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Turner	55 min
Aug 16, 10:17 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas, Hutchinson	58 min
Aug 16, 10:17 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	58 min
Aug 16, 10:37 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner	68 min
Aug 16, 10:37 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	68 min
Aug 16, 11:06 PM CDT	Severe Thunderstorm Warning	FSD	Union	54 min

Nearby

Tornado Warnings in South Dakota, 1986 Every tornado warning in 1986 Tornadoes in 1986

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.