Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 47, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 6, 1986, 8:54 PM CDT for Charles Mix County, Gregory County, South Dakota. It was in force for 66 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 6, 1986, 8:54 PM CDT (01:54 UTC)
- Expired
- Jun 6, 1986, 10:00 PM CDT
- In force
- 66 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Charles Mix County, SD, Gregory 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 6, 9:15 PM CDT | Thunderstorm Wind 69 | Gregory, 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, 1.9 hours before the alert went out and 193 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
- 1880 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 996 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 10.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 070154 SVRFSD SDC023-053-070300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 854 PM CDT FRI JUN 6 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL SOUTH DAKOTA...CHARLES-MIX AND EASTERN GREGORY THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN SOUTH/CENTRAL SOUTH DAKOTA ARE BONESTEEL..PICKSTOWN..AND PLATTE. AT 845 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM WEST OF PLATTE SOUTH DAKOTA WHICH IS 50 MILE SOUTHWEST OF MITCHELL TO JUST WEST OF BONESTEEL WITH IS ABOUT 70 MILES SOUTHWEST OF MITCHELL. THE LINE WAS MOVING EAST/SOUTHEAST AT 30 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. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. RYRHOLM
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
Local storm report, Jun 6, 7:00 PM CDT, 1 hour 54 minutes before
STORM REPORT NATIONAL WEATHER SERVICE HURON SD 659 PM CDT FRI JUN 6 1986 645 PM CDT...5 NW CANNING SD..PEA TO DIME SIZED HAIL.
Local storm report, Jun 6, 8:32 PM CDT, 22 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
833 PM CDT FRI JUN 6 1986
717 PM CDT...HARROLD SD..25 MILES ENE OF PIERRE..WINDS EST 50-60MPH
BY RAINFALL SPOTTER.
725 PM CDT...KENNEBEC SD..33 SSE OF PIERRE..WINDS EST 60-70MPH BY
RAINFALL SPOTTER.The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 7:22 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 68 min |
| Jun 6, 7:43 PM CDT | Severe Thunderstorm Warning | FSD | Gregory, Tripp | 62 min |
| Jun 6, 7:59 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix | 61 min |
| Jun 6, 9:28 PM CDT | Severe Thunderstorm Warning | FSD | Hanson | 62 min |
| Jun 6, 9:57 PM CDT | Severe Thunderstorm Warning | FSD | McCook | 63 min |
| Jun 6, 10:18 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Turner | 57 min |
| Jun 6, 10:18 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 57 min |
| Jun 6, 10:44 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 36 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.