Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 77, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1986, 9:49 PM CDT for Clay County, Yankton County, South Dakota. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jun 28, 1986, 9:49 PM CDT (02:49 UTC)
- Expired
- Jun 28, 1986, 10:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Clay 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.
The nearest sounding before it
Aberdeen, SD (KHON), launched 00:00Z, 2.8 hours before the alert went out and 236 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 290249 SVRFSD SDC009-027-135-290345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 949 PM CDT SAT JUN 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...SOUTHERN BON-HOMME...SOUTHERN CLAY AND SOUTHERN YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE SPRINGFIELD..YANKTON AND VERMILLION. AT 945 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM ALONG THE MISSOURI RIVER FROM 10 MILES SOUTHEAST OF YANKTON SOUTH DAKOTA TO 35 MILES WEST OF YANKTON. THESE SEVERE THUNDERSTORMS WERE MOVING EASTSOUTHEAST AT 10 TO 20 MPH. BETWEEN 920 PM CDT AND 940 PM CDT PEA TO GOLFBALL SIZE HAIL WAS REPORTED TO HAVE OCCURED IN THE YANKTON SOUTH DAKOTA AREA. 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, 1 hour 25 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
Special weather statement, Jun 28, 9:33 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 935 PM CDT SAT JUN 28 1986 AT 930 PM CDT A AREA OF INTENSE THUNDERSTORMS WAS LOCATED FROM 10 MILES SOUTH OF YANKTON SOUTH DAKOTA TO 5
Special weather statement, Jun 28, 9:34 PM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 930 PM CDT SAT JUN 28 1986 ...SEVERE THUNDERSTORM WATCH FOR EXTREME SOUTHEAST SOUTH DAKOTA UNTIL 300 AM CDT... INTENSITY THUNDERSTORMS WERE CONTINUING OVER EXTREME SOUTHEAST SOUTH DAKOTA ALONG THE MISSOURI RIVER. AT 925 PM CDT RADAR INDICATED THE MOST INTENSITY THUNDERSTORMS JUST SOUTHWEST OF YANKTON AND WEST OF YANTON NEAR SPRINGFIELD. THE THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT 10 TO 20 MPH. PEOPLE BOATING AND CAMPING ALONG THE MISSOURI RIVER IN EXTREME SOUTHEAST SOUTH DAKOTA AND IN THE CITIES OF SPRINGFIELD..YANKTON AND VERMILLION ARE ADVISED TO BE ALERT FOR POSSIBLE SEVERE WEATHER UNTIL MIDNIGHT CDT. BEHREND
Special weather statement, Jun 28, 9:39 PM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE SIOUX FALLS SD 935 PM CDT SAT JUN 28 1986 ...SEVERE THUNDERSTORM WATCH FOR EXTREME SOUTHEAST SOUTH DAKOTA UNTIL 300 AM CDT... INTENSITY THUNDERSTORMS WERE CONTINUING OVER EXTREME SOUTHEAST SOUTH DAKOTA ALONG THE MISSOURI RIVER. AT 925 PM CDT RADAR INDICATED THE MOST INTENSITY THUNDERSTORMS JUST SOUTHWEST OF YANKTON AND 35 MILES WEST OF YANTON NEAR SPRINGFIELD. THE THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT 10 TO 20 MPH. PEOPLE BOATING AND CAMPING ALONG THE MISSOURI RIVER IN EXTREME SOUTHEAST SOUTH DAKOTA AND IN THE CITIES OF SPRINGFIELD..YANKTON AND VERMILLION ARE ADVISED TO BE ALERT FOR POSSIBLE SEVERE WEATHER UNTIL MIDNIGHT CDT. VERY HEAVY RAIN..LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE. BEHREND
Special weather statement, Jun 28, 9:49 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 945 PM CDT SAT JUN 28 1986 ...SEVERE THUNDERSTORM WATCH FOR EXTREME SOUTHEAST SOUTH DAKOTA UNTIL 3 AM CDT SUNDAY JUNE 29... AT 935 PM CDT...SEVERAL INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED IN EXTREME SOUTHEASTERN SOUTH DAKOTA..AND ALSO EXTREME NORTHEASTERN NEBRASKA. THESE THUNDERSTORMS WERE IN A 25 MILE WIDE AREA FROM 60 MILES WEST OF YANKTON..NEAR PICKSTOWN...TO 35 MILES SOUTHEAST OF YANKTON..NEAR ELK POINT. HAIL..STRONG WINDS..AND VERY HEAVY RAINS ARE POSSIBLE WITH THESE THUNDERSTORMS. ELSEWHERE..SCATTERED LIGHT RAINSHOWERS HAD DEVELOPED IN CENTRAL SOUTH DAKOTA. THESE WERE IN A 25 MILE WIDE AREA FROM MOBRIDGE TO 20 MILES SOUTHEAST OF PIERRE. ALL MOVEMENT WAS SOUTHEAST AT 15 MILES AN HOUR. KRAUSE/REYNOLDS
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 | 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; the sounding from the Mesonet's radiosonde archive.