Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 2, NWS Sioux Falls, SD

April 26, 1986Lincoln County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Apr 26, 1986, 5:41 PM CST for Lincoln County, South Dakota. It was in force for 34 min. 3 reports 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: Apr 26, 1986, 5:41 PM CST (23:41 UTC)
Expired: Apr 26, 1986, 6:15 PM CST
In force: 34 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Lincoln 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
Apr 26, 5:50 PM CST	Tornado F2	Lincoln, SD
Apr 26, 6:10 PM CST	Hail 1	Lincoln, SD
Apr 26, 6:10 PM CST	Thunderstorm Wind 0	Lincoln, 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, 11.7 hours before the alert went out and 220 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: 3605 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 301 m²/s²
0-3 km storm-relative helicity: 522 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 KFSD 262341
TORFSD
SDC083-270015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
541 PM CST SAT APR 26 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 615 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHEAST SOUTH DAKOTA...LINCOLN

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE
BEREFORD..WORTHING..CANTON.

AT 535 PM CST  A FUNNEL CLOUD WAS REPORTED AT DAVIS AND
CENTERVILLE OR 25 MILES SOUTHWEST OF SIOUX FALLS MOVING
EAST NORTHEAST AT 25 TO 30 MPH.

IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT
SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTER6IOR ROOM ON THE
LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR
A REINFORCED BUILDING.

KOSCIELSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 3:39 PM CST	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	66 min
Apr 26, 4:13 PM CST	Severe Thunderstorm Warning	FSD	Hutchinson, Turner, Yankton	62 min
Apr 26, 5:07 PM CST	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha, Turner	68 min
Apr 26, 5:27 PM CST	Tornado Warning	FSD	Turner	33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.