Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 155, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 4, 1986, 5:02 AM CDT for Bon Homme County, South Dakota. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Aug 4, 1986, 5:02 AM CDT (10:02 UTC)
- Expired
- Aug 4, 1986, 6:00 AM CDT
- In force
- 58 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Bon Homme 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, 10.0 hours before the alert went out and 217 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
- NaN m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 133 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 041002 SVRFSD SDC009-041100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 502 AM CDT MON AUG 4 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST SOUTH DAKOTA...SOUTHERN BON-HOMME THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN THIS WARNING ARE AT 500 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR TYNDALL OR 20 MILES WEST NORTHWEST OF YANKTON MOVING TO THE EAST SOUTHEAST AT 20 MPH. IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED SHELTER. A SEVERE TH/UNDERSTORM 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. KOSCIELSKI
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, Aug 4, 1:34 AM CDT, 3 hours 28 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 134 AM CDT MON AUG 4 1986 AT 130 AM CDT...SCATTERED THUNDERSTORMS..SOME WITH VERY HEAVY RAIN..CONTINUED TO DEVELOP OVER PARTS OF SOUTHWESTERN AND SOUTH CENTRAL SOUTH DAKOTA. THESE ALSO EXTENDED INTO NORTHERN NEBRASKA. IN SOUTH DAKOTA..THE THUNDERSTORMS WERE SOUTH OF A LINE FROM 15 MILES NORTHWEST OF WINNER...TO WALL..WHICH IS 50 MILES EAST OF RAPID CITY. t THE STRONGEST STORM WAS 30 MILES SOUTHWEST OF WINNER. HAIL..GUSTY WINDS..FREQUENT LIGHTNING STRIKES..AND VERY HEAVY RAINS ARE POSSIBLE WITH SOME OF THESE STORMS. MOVEMENT WAS EAST AT 10 MILES AN HOUR. KRAUSE/STOREY
Special weather statement, Aug 4, 2:33 AM CDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 232 AM CDT MON AUG 4 1986 AT 225 AM CDT...SCATTERED SHOWERS AND THUNDERSTORMS..AND AN ISOLATED INTENSE THUNDERSTORM WITH VERY HEAVY RAIN.. CONTINUED OVER PARTS OF SOUTHWESTERN AND SOUTH CENTRAL SOUTH DAKOTA. THESE ALSO EXTENDED INTO NORTHERN NEBRASKA. IN SOUTH DAKOTA..THE THUNDERSTORMS WERE SOUTH AND WEST OF A LINE FROM JUST WEST OF WINNER...TO PHILIP. THE STRONGEST STORM WAS 30 MILES SOUTHWEST OF WINNER.. ALONG THE SOUTH DAKOTA..NEBRASKA BORDER. HAIL..GUSTY WINDS..FREQUENT LIGHTNING STRIKES..AND VERY HEAVY RAINS ARE POSSIBLE WITH SOME OF THESE STORMS. MOVEMENT WAS EAST AT 10 MILES AN HOUR. KRAUSE/STOREY
Special weather statement, Aug 4, 3:30 AM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 330 AM CDT MON AUG 4 1986 AT 325 AM CDT...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER PARTS OF SOUTHWESTERN AND SOUTH CENTRAL SOUTH DAKOTA..BUT NEW THUNDERSTORMS HAD ALSO DEVELOPED OVER PARTS OF NORTHWESTERN AND EXTREME SOUTHEASTERN SOUTH DAKOTA. THESE THUNDERSTORMS ALSO EXTENDED INTO NORTHERN NEBRASKA. IN SOUTH DAKOTA..THE THUNDERSTORMS WERE SOUTH OF A LINE FROM 40 MILES WEST OF YANKTON...TO PHILIP. THE STRONGEST STORMS WERE JUST EAST OF WINNER..AND ALSO NEAR PICKSTOWN..55 MILES WEST OF YANKTON. HAIL..GUSTY WINDS..FREQUENT LIGHTNING STRIKES..AND VERY HEAVY RAINS ARE POSSIBLE WITH SOME OF THESE STORMS. ALSO..A THUNDERSTORM HAD DEVELOPED IN NORTHWESTERN SOUTH DAKOTA.. NEAR ISABEL..OR 40 MILES SOUTHEAST OF LEMMON. ALL MOVEMENT WAS EAST AT 15 MILES AN HOUR. KRAUSE/STOREY
Special weather statement, Aug 4, 4:40 AM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 440 AM CDT MON AUG 4 1986 AT 430 AM CDT...SCATTERED SHOWERS AND THUNDERSTORMS..SOME WITH VERY HEAVY RAIN..CONTINUED OVER PARTS OF SOUTH CENTRAL AND EXTREME SOUTHEASTERN SOUTH DAKOTA..BUT NEW THUNDERSTORMS HAD ALSO DEVELOPED OVER PARTS PARTS OF CENTRAL AND EAST CENTRAL SOUTH DAKOTA. THESE THUNDERSTORMS ALSO EXTENDED INTO NORTHERN NEBRASKA. IN SOUTH DAKOTA..THE THUNDERSTORMS WERE SOUTH OF A LINE FROM YANKTON..TO HURON..TO PHILIP..AND BACK TO THE NEBRASKA BORDER 40 MILES SOUTHWEST OF WINNER. THE STRONGEST STORMS WERE JUST SOUTHWEST OF HURON..AND ALSO NEAR PICKSTOWN..55 MILES WEST OF YANKTON. HAIL..G USTY WINDS..FREQUENT LIGHTNING STRIKES..AND VERY HEAVY RAINS ARE POSSIBLE WITH SOME OF THESE STORMS. ALL MOVEMENT WAS EAST AT 20 MILES AN HOUR. KRAUSE/STOREY
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 7:22 PM CDT | Severe Thunderstorm Warning | FSD | Tripp | 68 min |
| Aug 3, 8:29 PM CDT | Severe Thunderstorm Warning | FSD | Tripp | 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; the sounding from the Mesonet's radiosonde archive.