Alert archive / South Dakota / Tornado Warnings in 1986
Tornado Warning 12, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 29, 1986, 4:49 PM CDT for Clay County, Turner County, Yankton County, South Dakota. It was in force for 56 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 29, 1986, 4:49 PM CDT (21:49 UTC)
- Expired
- Jun 29, 1986, 5:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Clay County, SD, Turner County, SD, Yankton 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 29, 5:55 PM CDT | Hail 2 | Yankton, 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, 9.8 hours before the alert went out and 206 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3641 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 292149 TORFSD SDC027-125-135-292245- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 449 PM CDT SUN JUN 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...CLAY...SOUTHERN TURNER AND YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN ;SOUTHEAST SOUTH DAKOTA ARE HURLEY.. MAYFIELD..YANKTON..WAKONDA AND VERMILLION. AT 445 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM FROM 5 NORTH OF YANKTON SOUTH DAKOTA TO 25 MILES NORTHNORTHEAST OF YANKTON MOVING EAST AT 25 MPH. IF YOU ARE
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:32 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 58 min |
| Jun 28, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 56 min |
| Jun 28, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 56 min |
| Jun 29, 3:11 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 34 min |
| Jun 29, 3:17 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 58 min |
| Jun 29, 4:06 PM CDT | Tornado Warning | FSD | Hutchinson, Turner, Yankton | 39 min |
| Jun 29, 5:37 PM CDT | Tornado Warning | FSD | Lincoln, Turner | 38 min |
| Jun 29, 6:02 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 58 min |
| Jun 29, 6:02 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 58 min |
| Jun 29, 6:09 PM CDT | Severe Thunderstorm Warning | FSD | Union | 66 min |
| Jun 29, 6:17 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 58 min |
Nearby
Tornado Warnings in South Dakota, 1986Every tornado warning in 1986Tornadoes 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.