Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 178, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 16, 1986, 11:06 PM CDT for Union County, South Dakota. It was in force for 54 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
- Aug 16, 1986, 11:06 PM CDT (04:06 UTC)
- Expired
- Aug 17, 1986, 12:00 AM CDT
- In force
- 54 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Union 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 |
|---|---|---|---|
| Aug 16, 11:27 PM CDT | Thunderstorm Wind 0 | Union, 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 00:00Z, 4.1 hours before the alert went out and 170 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
- 3605 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 48 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 KSUX 170406
SVRSUX
SDC127-170500-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX-CITY IA
1106 PM CDT SAT AUG 16 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL MIDNIGHT CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
IN SOUTHEAST SOUTH DAKOTA
..UNION
AT 1125 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST TO THE EAST
OF VERMILLION...33 MILES NORTHWEST OF SIOUX CITY...IN SOUTHEAST SOUTH
DAKOTA. AT 1127 PM WIND GUSTS OVER 70 MILES AN HOUR WERE REPORTED IN
VERMILLION.
THIS THUNDERSTORM WAS MOVING SOUTHEAST AT 15 MILES AN HOUR.
PERSONS IN UNION COUNTY SOUTH DAKOTA SHOULD BE ON THE LOOKOUT FOR THE
APPROACH OF ANY SEVERE WEATHER AND TAKE SHELTER IMMEDIATELY IF
OBSERVED.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH,
DESTRUCTIVE HAIL, DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
SHERLINWhat 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 16, 9:49 PM CDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 948 PM CDT SAT AUG 16 1986 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EAST CENTRAL AND SOUTHEAST SOUTH DAKOTA UNTIL 11PM CDT TONIGHT... AT 945 PM... THERE WERE NUMEROUS INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN IN EAST CENTRAL AND SOUTHEAST SOUTH DAKOTA. THE STRONGEST THUNDERSTORMS WERE 30 MILES NORTHWEST OF MITCHELL NEAR PLANKINTON AND 35 MILES NORTHWEST OF SIOUX FALLS NEAR WINFRED. HAIL AND STRONG GUSTY WINDS WERE IN THESE STORMS. MOVEMENT WAS EAST AT 12 MILES AN HOUR. BE ALERT FOR SEVERE THUNDERSTORMS AND TAKE IMMEDIATE COVER. PRESTON
Local storm report, Aug 16, 10:16 PM CDT, 50 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1010 PM CDT SAT AUG 16 1986
TIME EVENT AND LOCATION
945-950 PM CDT 55 MPH WIND GUST AT CANISTOTA SD IN MCKOOK COUNTY
70 MPH WIND GUST AT SALEM SD IN MCKOOK COUNTY
MARBLE SIZE HAIL 6 MILES OF SALEM IN MCKOOK COUNTY
60 MPH WIND GUST AT MT VERNON SD IN DAVISON COUNTY
BUSSLocal storm report, Aug 16, 10:24 PM CDT, 42 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1025 PM CDT SAT AUG 16 1986
TIME EVENT AND LOCATION
1015 PM CDT 40 MPH WIND GUST AT HUMBODLT SD IN MINNEHAHA COUNTY
LOST ELECTRICITY DUE TO FREQUENT LIGHTNING STRIKES
AT HUMBODLT SD IN MINNEHAHA COUNTY
BUSSLocal storm report, Aug 16, 10:29 PM CDT, 37 minutes before
KFSD 170329
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1030 PM CDT SAT AUG 16 1986
TIME EVENT AND LOCATION
1008 PM CDT FUNNEL CLOUD REPORTED BY CIVIL DEFENSE PERSONS JUST
NORTH AND SOUTH OF PARKER SD IN TURNER COUNTY NO
TOUCHDOWN.
BUSSLocal storm report, Aug 16, 10:34 PM CDT, 32 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1030 PM CDT SAT AUG 16 1986
TIME EVENT AND LOCATION
1008 PM CDT FUNNEL CLOUDY REPORTED BY CIVIL DEFENSE PERSONS JUST
! NORTH AND SOUTH OF PARKER SD IN TURNER COUNTY..NO
TOUCHDOWN.
BUSSSpecial weather statement, Aug 16, 10:44 PM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1040 PM CDT SAT AUG 16 1986 ...SEVERE THUNDERSTORM WATCH FOR SOUTHEAST SOUTH DAKOTA..NORTHWEST IOWA..AND NORTHEAST NEBRASKA UNTIL 400 AM CDT FRIDAY MORNING... AT 1040 PM...THERE WERE NUMEROUS INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN IN SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA. THE STRONGEST THUNDERSTORMS WERE IN A 25 MILE WIDE BAND FROM SIOUX FALLS TO 30 MILES SOUTHWEST OF MITCHELL. HAIL AND STRONG GUSTY WINDS HAD BEEN REPORTED WITH THESE STORMS. MOVEMENT WAS EAST AT 12 MILES AN HOUR. BE ALERT FOR SEVERE THUNDERSTORMS AND BE PREPARED TO TAKE COVER IF THREATENING WEATHER APPROACHES.. STOREY
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 9:10 PM CDT | Tornado Warning | FSD | Aurora, Brule | 35 min |
| Aug 16, 9:16 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook | 59 min |
| Aug 16, 9:16 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule | 59 min |
| Aug 16, 9:16 PM CDT | Severe Thunderstorm Warning | FSD | Davison | 59 min |
| Aug 16, 10:05 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Minnehaha | 55 min |
| Aug 16, 10:05 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 55 min |
| Aug 16, 10:17 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Douglas, Hutchinson | 58 min |
| Aug 16, 10:17 PM CDT | Severe Thunderstorm Warning | FSD | Hanson | 58 min |
| Aug 16, 10:37 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner | 68 min |
| Aug 16, 10:37 PM CDT | Severe Thunderstorm Warning | FSD | Yankton | 68 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.