Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 40, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 29, 1986, 7:06 PM CDT for McCook County, South Dakota. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- May 29, 1986, 7:06 PM CDT (00:06 UTC)
- Expired
- May 29, 1986, 7:50 PM CDT
- In force
- 44 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County McCook 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, 0.1 hours before the alert went out and 159 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
- 166 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1572 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 300006 SVRFSD SDC087-300100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 706 PM CDT THU MAY 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST SOUTH DAKOTA...MCCOOK SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE SALEM.. AND SPENCER. AT 705 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 30 MILES WEST/NORTHWEST OF SIOUX FALLS NEAR THE CITY OF SALEM. THIS SEVERE THUNDERSTORM WAS MOVING WEST AT 20 MPH. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
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 29, 5:40 PM CDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 540 PM CDT THU MAY 29 1986 AT 530 PM CDT...SCATTERED SHOWERS AND THUNDERSTORMS.. SOME WITH VERY HEAVY RAIN..CONTINUED OVER PARTS OF SOUTHEASTERN SOUTH DAKOTA AND SOUTHWESTERN MINNESOTA. IN SOUTH DAKOTA...THE THUNDERSTORMS AND SHOWERS WERE MOSTLY SOUTH OF A LINE FROM BROOKINGS TO CHAMBERLAIN..60 MILES SOUTHEAST OF PIERRE. IN MINNESOTA..THE STRONGEST THUNDERSTORM WAS 25 MILES NORTH OF WORTHINGTON. IN SOUTH DAKOTA..THE STRONGEST THUNDERSTORM WAS JUST NORTH OF MITCHELL. VERY HEAVY RAIN..STRONG WINDS..AND HAIL ARE POSSIBLE WITH THESE THUNDERSTORMS. MOVEMENT WAS WEST AT 15 MILES AN HOUR. KRAUSE/SPRINGER
Special weather statement, May 29, 6:38 PM CDT, 28 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 638 PM CDT THU MAY 29 1986 AT 630 PM CDT...SCATTERED SHOWERS AND THUNDERSTORMS.. SOME WITH HEAVY RAIN..CONTINUED OVER PARTS OF SOUTHEASTERN SOUTH DAKOTA AND SOUTHWESTERN MINNESOTA. IN SOUTH DAKOTA...THE THUNDERSTORMS AND SHOWERS WERE MOSTLY SOUTH OF A LINE FROM BROOKINGS TO CHAMBERLAIN..60 MILES SOUTHEAST OF PIERRE. IN SOUTH DAKOTA..THE STRONGEST THUNDERSTORMS WERE 10 MILES NORTHEAST OF SALEM..AND ALSO NEAR PLANKINTON. HEAVY RAIN..STRONG WINDS..AND HAIL ARE POSSIBLE WITH THESE THUNDERSTORMS. MOVEMENT WAS WEST AT 15 MILES AN HOUR. KRAUSE/SPRINGER
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.