Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 76, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1986, 8:32 PM CDT for Bon Homme County, Yankton County, South Dakota. It was in force for 58 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 28, 1986, 8:32 PM CDT (01:32 UTC)
- Expired
- Jun 28, 1986, 9:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Bon Homme 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 28, 9:30 PM CDT | Hail 0.75 | 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
Aberdeen, SD (KHON), launched 00:00Z, 1.5 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.
- Mixed-layer CAPE
- 640 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 1569 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 290132 SVRFSD SDC009-135-290230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 832 PM CDT SAT JUN 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...SOUTHEAST BON-HOMME AND SOUTHERN YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTHDAKOTA ARE TYNDALL ..TABOR AND YANKTON. AT 825 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH OF TYNDALL SOUTH DAKOTA MOVINF EAST SOUTHEAST AT 10 TO 20 MPH. IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF 60 MPH..HAIL 3/4 INCH OR LARGER..DEADLY LIGHTNING..AND HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA. BEHREND
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 28, 8:24 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 820 PM CDT SAT JUN 28 1986 ...SEVERE THUNDERSTORM WATCH FOR FAR WESTERN SOUTH DAKOTA CANCELLED... THE SEVERE THUNDERSTORM WATCH IN EFFECT FOR FAR WESTERN SOUTH DAKOTA UNTIL 9 PM MDT HAS BEEN CANCELLED. SCATTERED THUNDERSTORMS TONIGHT IN WESTERN SOUTH DAKOTA ARE NOT EXPECTED TO BE SEVERE. HOWEVER SCATTERED THUNDERSTORMS DEVELOPING IN EXTREME SOUTHERN SOUTH DAKOTA THIS EVENING MAY BECOME SEVERE NEAR THE NEBRASKA BORDER. RYRHOLM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 4:49 PM CDT | Tornado Warning | FSD | Clay, Turner, Yankton | 56 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
Severe Thunderstorm Warnings in South Dakota, 1986Every severe thunderstorm warning 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.