Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 28, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 10, 1986, 5:50 PM CDT for Clay County, Yankton County, South Dakota. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- May 10, 1986, 5:50 PM CDT (22:50 UTC)
- Expired
- May 10, 1986, 6:45 PM CDT
- In force
- 55 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
Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 195 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
- 3576 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 63 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 102250 SVRFSD SDC079-087-099-027-125-135-102345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 550 PM CDT SAT MAY 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...LAKE...MCCOOK...WESTERN MINNEHAHA...CLAY... TURNER AND EASTERN YANKTON THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE MADISON..SALEM..COLTON..MARION..PARKER..VOLIN..VERMILLION. AT 545 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 10 MILES WEST OF MADISON TO 30 MILES WEST OF SIOUX FALLS TO 5 MILES EAST OF YANKTON MOVING EAST AT 25 MPH. AT 540 PM CDT PARKER STATE RADIO REPORTED 1 INCH HAIL AT EMERLY ABOUT 20 EAST SOUTHEAST OF MITCHELL. 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. 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, May 10, 5:12 PM CDT, 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 510 PM CDT SAT MAY 10 1986 AT 505 PM CDT A SOLID LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN WAS WAS LOCATED FROM 5 MILES WEST OF ARLINGTON OR 22 MILES WEST OF BROOKINGS TO BRIDGEWATER OR 30 MILES WEST OF SIOUX FALLS TO 5 MILES EAST OF YANKTON IN SOUTHEAST SOUTH DAKOTA. THE STORMS ARE MOVING EAST AT ABOUT 30 MPH AND WILL EFFECT THE FOLLOWING COUNTIES BETWEEN 510 PM AND 610 PM CDT...BROOKINGS LAKE..MOODY..MCCOOK..MINNEHAHA..TURNER.. LINCOLN..EAST YANKTON.. AND CLAY. SOME CITIES EFFECT ARE BROOKINGS.. MADISON..SALEM..SIOUX FALLS..PARKER..VERMILLION..AND BERESFORD. THESE STORMS WERE PRODUCING VERY HEAVY RAINS..POSSIBLE SMALL HAIL.. AND WINDS TO 40 MPH. KOSCIELSKI
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 5:50 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Minnehaha, Turner | 55 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.