Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 43, NWS Sioux Falls, SD

June 6, 1986Todd County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 6, 1986, 6:58 PM CDT for Todd County, South Dakota. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1986, 6:58 PM CDT (23:58 UTC)
Expired
Jun 6, 1986, 8:00 PM CDT
In force
62 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Todd 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

Rapid City, SD (KRAP), launched 12:00Z, 12.0 hours before the alert went out and 199 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.

Skew-T log-pSkew-T log-p diagram, Rapid City, SD at 12:00Z on 1986-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 447 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 1986-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
447 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
1306 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFSD 062358
SVRFSD
SDC121-070100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
658 PM CDT FRI JUN 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

SOUTH CENTRAL SOUTH DAKOTA...TODD

SOME OF THE CITIES INCLUDED IN SOUTH/CENTRAL SOUTH DAKOTA ARE
MISSION...ST. FRANCIS..AND OLSONVILLE.

AT 655 PM CDT  RADAR INDICATED A SEVERE THUNDERSTORM 50 MILES WEST
OF WINNER IN SOUTH/CENTRAL SOUTH DAKOTA OR 18 MILE NORTH OF ST.
FRANCIS MOVING EAST/SOUTHEAST AT 30 MPH.

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 WARNING SO BE ON THE LOOKOUT.

RYRHOLM

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 6:24 PM CDTSevere Thunderstorm WarningFSDTripp66 min
Jun 6, 6:28 PM CDTSevere Thunderstorm WarningFSDTripp62 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.