Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 50, NWS Sioux Falls, SD

June 6, 1986Minnehaha County, Turner County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 6, 1986, 10:18 PM CDT for Minnehaha County, Turner County, South Dakota. It was in force for 57 min. 1 report 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
Jun 6, 1986, 10:18 PM CDT (03:18 UTC)
Expired
Jun 6, 1986, 11:15 PM CDT
In force
57 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Minnehaha County, SD, Turner 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

TimeReportWhereRemark
Jun 6, 10:45 PM CDTThunderstorm Wind 0Minnehaha, 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

Aberdeen, SD (KHON), launched 00:00Z, 3.3 hours before the alert went out and 194 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, Aberdeen, SD at 00:00Z on 1986-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1880 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, Aberdeen, SD at 00:00Z on 1986-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 square meters per square second.19395878Sfc1 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
1880 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
996 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
2.1
Supercell composite
10.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 070318
SVRFSD
SDC079-099-101-125-070415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1018 PM CDT FRI JUN 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

EAST CENTRAL SOUTH DAKOTA...EASTERN LAKE...MINNEHAHA...MOODY AND 
 TURNER

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE SIOUX
FALLS..PARKER..DELL RAPIDS..AND FLANDREAU.

AT 1015 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
EXTENDING FROM 10 MILES SOUTH OF BROOKINGS SOUTH DAKOTA TO 50 MILES
SOUTHWEST OF SIOUX FALLS NEAR MARION SOUTH DAKOTA..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 WARNING SO BE ON THE LOOKOUT.

RYRHOLM

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

Local storm report, Jun 6, 7:00 PM CDT, 3 hours 18 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
659 PM CDT FRI JUN 6 1986

645 PM CDT...5 NW CANNING SD..PEA TO DIME SIZED HAIL.
Local storm report, Jun 6, 8:32 PM CDT, 1 hour 46 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
833 PM CDT FRI JUN 6 1986

717 PM CDT...HARROLD SD..25 MILES ENE OF PIERRE..WINDS EST 50-60MPH
             BY RAINFALL SPOTTER.

725 PM CDT...KENNEBEC SD..33 SSE OF PIERRE..WINDS EST 60-70MPH BY
             RAINFALL SPOTTER.
Local storm report, Jun 6, 10:06 PM CDT, 12 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
1005 PM CDT FRI JUN 6 1986

920 PM CDT...JUNCTION HWY 34 AND 37..NEAR WOONSOCKET..19 MILES SOUTH
             OF HURON..DIME SIZE HAIL BY CIVILIAN.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 7:22 PM CDTSevere Thunderstorm WarningFSDBrule68 min
Jun 6, 7:43 PM CDTSevere Thunderstorm WarningFSDGregory, Tripp62 min
Jun 6, 7:59 PM CDTSevere Thunderstorm WarningFSDCharles Mix61 min
Jun 6, 8:54 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Gregory66 min
Jun 6, 9:28 PM CDTSevere Thunderstorm WarningFSDHanson62 min
Jun 6, 9:57 PM CDTSevere Thunderstorm WarningFSDMcCook63 min
Jun 6, 10:18 PM CDTSevere Thunderstorm WarningFSDLake, Moody57 min
Jun 6, 10:44 PM CDTSevere Thunderstorm WarningFSDLincoln36 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.