Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 13, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 7, 1986, 9:53 PM CDT for Yankton County, South Dakota. It was in force for 67 min. 2 reports 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
- May 7, 1986, 9:53 PM CDT (02:53 UTC)
- Expired
- May 7, 1986, 11:00 PM CDT
- In force
- 67 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County 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 |
|---|---|---|---|
| May 7, 10:10 PM CDT | Thunderstorm Wind 0 | Yankton, SD | |
| May 7, 10:35 PM CDT | Thunderstorm Wind 0 | 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
Omaha, NE (KOAX), launched 00:00Z, 2.9 hours before the alert went out and 206 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
- 3569 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 156 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 080253 SVRFSD SDC023-053-135-080400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 953 PM CDT WED MAY 7 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL SOUTH DAKOTA...SOUTHEAST CHARLES-MIX...EXTREME SOUTHEAST GREGORY AND YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE BONESTEEL...PICKSTOWN...WAGNER...YANKTON... AT 950 PM CDT RADAR INDICATED A NUMBER OF SEVERE THUNDERSTORMS... ONE 10 MILES SOUTH OF BONESTEEL...AND ANOTHER IN THE SOUTHEAST CORNER OF YANKTON COUNTY. THESE STORMS WERE MOVING NORTH NORTHEAST AT 25 MILES PER HOUR. 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. WILLIAMS
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, May 7, 4:41 PM CDT, 5 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 440 PM CDT WED MAY 7 1986 ...WEATHER ADVISORY FOR LIVESTOCK TONIGHT AND THURSDAY EXTREME NORTHWEST AND WEST/CENTRAL SOUTH DAKOTA... A VERY SLOW MOVING LOW PRESSURE SYSTEM OVER THE ROCKIES INTO THE WESTERN HIGH PLAINS WILL CAUSE WET WEATHER OVER MUCH OF SOUTH DAKOTA INTO THE WEEKEND. TEMPERATURES WILL BE COOL ENOUGH IN EXTREME NORTHWEST AND WEST/CENTRAL SOUTH DAKOTA FOR OCCASIONAL COLD RAIN TO BE MIXED WITH WET SNOW AT TIMES. DAMP EAST TO NORTHEAST WINDS OF 10 TO 25 MPH WILL ALSO PUT A STRESS ON LIVESTOCK IN THESE AREAS. WARMER MOIST AIR WILL SURGE INTO MUCH OF THE REMAINDER OF SOUTH DAKOTA THROUGH FRIDAY. DEVELOPING SCATTERED SHOWERS AND THUNDERSTORMS COULD BE HEAVY AT TIMES THROUGH FRIDAY. THIS WILL NOT BE GOOD NEWS FOR PEOPLE WHO ALREADY HAVE ENOUGH WATER TO LAST THEM FOR AWHILE. IT IS STILL TOO SOON TO SAY EXACTLY WHERE IN THE STATE WILL GET THE HEAVIEST PRECIPITATION..SO PLEASE KEEP UP TO DATE ON THE LATEST FORECASTS. RYRHOLM
Special weather statement, May 7, 7:49 PM CDT, 2 hours 4 minutes before
KHON 080047 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 745 PM CDT WED MAY 7 1986 AT 745 PM CDT...THERE WERE SCATTERED INTENSE THUNDERSTORMS WITH HEAVY RAIN IN CENTRAL AND SOUTHWEST SOUTH DAKOTA. THE THUNDESTORMS WERE FROM 40 MILES NORTHWEST OF HURON TO 70 MILES SOUTHEAST OF RAPID CITY NEAR MARTIN. SMALL HAIL IS POSSIBLE IN THE THUNDERSTORMS WITH WIND GUST TO 45 MILES AN HOUR. THUNDERSTORMS WERAE MOVING NORTH AT 45 MILES AN HOUR. PRESTON
Special weather statement, May 7, 8:00 PM CDT, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 800 PM CDT WED MAY 7 1986 AT 750 PM CDT INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLE HAIL WERE LOCATED OVER PORTIONS OF NORTHEAST NEBRASKA AND WILL BE MOVING INTO SOUTH DAKOTA FROM ABOUT PICKSTOWN TO YANKTON WITHIN THE NEXT HOUR. IT MAY BE NECCASSARY TO ISSUE WARNINGS ON THERE STORMS LATER THIS EVENING. AN AREA OF VERY HEAVY RAIN WAS ALSO LOCATED OVER CENTRAL SOUTH DAKORTA FROM PIERRE SOUTHWEST TO MISSION. ALL STORMS WERE MOVING TO THE NORTH NORTHEAST AT ABOUT 25 MPH. KOSCIELSKI
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 8:27 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 53 min |
| May 7, 9:23 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 57 min |
| May 7, 9:53 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 67 min |
| May 7, 10:25 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 65 min |
| May 7, 10:25 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln | 65 min |
| May 7, 11:06 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 59 min |
| May 7, 11:06 PM CDT | Severe Thunderstorm Warning | FSD | Douglas | 59 min |
| May 7, 11:06 PM CDT | Severe Thunderstorm Warning | FSD | McCook | 59 min |
| May 7, 11:32 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 59 min |
| May 8, 6:01 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 29 min |
| May 8, 6:07 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 43 min |
| May 8, 6:20 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 30 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.