Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 2, NWS Sioux Falls, SD

April 26, 1986Bon Homme County, Charles Mix County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 26, 1986, 3:39 PM CST for Bon Homme County, Charles Mix County, South Dakota. It was in force for 66 min. 3 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
Apr 26, 1986, 3:39 PM CST (21:39 UTC)
Expired
Apr 26, 1986, 4:45 PM CST
In force
66 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Bon Homme County, SD, Charles Mix 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
Apr 26, 3:40 PM CSTHail 2.75Charles Mix, SD
Apr 26, 4:00 PM CSTHail 2.75Bon Homme, SD
Apr 26, 4:20 PM CSTHail 2.75Bon Homme, 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 12:00Z, 9.7 hours before the alert went out and 201 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 12:00Z on 1986-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 1986-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939587897Sfc1 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
5 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
486 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
158 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 262139
SVRFSD
SDC009-023-262245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
339 PM CST SAT APR 26 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 445 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHEAST SOUTH DAKOTA...BON-HOMME AND SOUTHERN CHARLES-MIX

THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE PICKSTOWN
..AVON..TYNDAL.

AT 330 PM CST  RADAR INDICATED A SEVERE THUNDERSTORM ON THE
 MISSOURI RIVER JUST SOUTH OF PISCKSTOWN SOUTH DAKOTA AND ON THE
 MISSOURI RIVER 30 MILES WEST OF YANKTON. THESE THUNDERSTORMS
 WERE MOVING NORTHEAST AT 35 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 RAINN
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.

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, Apr 26, 10:44 AM CST, 4 hours 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1040 AM CST SAT APR 26 1986

...WINTER STORM WATCH TONIGHT AND SUNDAY FOR THE WESTERN THIRD
   SOUTH DAKOTA...
...WEATHER ADVISORY FOR LIVESTOCK THIS AFTERNOON WESTERN THIRD SOUTH
   DAKOTA...
...WEATHER ADVISORY FOR LIVESTOCK THIS AFTERNOON THROUGH SUNDAY FOR
   CENTRAL THROUGH NORTHEAST SOUTH DAKOTA...

SOUTH DAKOTA WILL FEEL THE BRUNT OF YET ANOTHER WINTER/LIKE STORM SYSTEM
THIS WEEKEND. COLD RAIN OR WET SNOW WILL CHANGE TO ALL SNOW BY TONIGHT
OVER THE WESTERN THIRD OF THE STATE AND CONTINUE INTO SUNDAY. HEAVY SNOW
IS POSSIBLE TONIGHT AND SUNDAY OVER THIS AREA ALONG WITH BLOWING AND
DRIFTING SNOW. NORTH WINDS WILL EVENTUALLY GUST TO OVER 40 MPH OVER
WESTERN SOUTH DAKOTA BY SUNDAY. CONSEQUENTLY...A WINTER STORM WATCH HAS
BEEN POSTED FOR THE WESTERN THIRD OF THE STATE FOR TONIGHT AND SUNDAY.

PERIODS OF COLD RAIN ALONG WITH THUNDERSTORMS WILL AFFECT THE CENTRAL
THROUGH NORTHEASTERN PARTS OF SOUTH DAKOTA. TEMPERATURES WILL BE IN THE
MID 30S TO MID 40S OVER THIS AREA THIS AFTERNOON THROUGH SUNDAY ALONG
WITH NORTHEAST TO NORTH WINDS INCREASING TO 15 TO 30 MPH. THE COLD RAIN
WILL BECOME MIXED HWITH OR CHANGE TO WET SNOW OVER THE CENTRAL PART OF
THE STATE TONIGHT AND SUNDAY. THEREFORE...A WEATHER ADVISORY FOR
LIVESTOCK IS IN EFFECT THIS AFTERNOON THROUGH SUNDAY FOR CENTRAL THROUGH
NORTHEAST SOUTH DAKOTA.

BEHREND
Special weather statement, Apr 26, 1:24 PM CST, 2 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
130 PM CST SAT APR 26 1986

...WINTER STORM WATCH TONIGHT AND SUNDAY FOR THE WESTERN THIRD
   SOUTH DAKOTA...
...WEATHER ADVISORY FOR LIVESTOCK THIS AFTERNOON WESTERN THIRD SOUTH
   DAKOTA...
...WEATHER ADVISORY FOR LIVESTOCK THIS AFTERNOON THROUGH SUNDAY FOR
   CENTRAL THROUGH NORTHEAST SOUTH DAKOTA...

SOUTH DAKOTA WILL FEEL THE BRUNT OF YET ANOTHER WINTER/LIKE STORM SYSTEM
THIS WEEKEND. COLD RAIN OR WET SNOW WILL CHANGE TO ALL SNOW BY TONIGHT
OVER THE WESTERN THIRD OF THE STATE AND CONTINUE INTO SUNDAY. HEAVY SNOW
IS POSSIBLE TONIGHT AND SUNDAY OVER THIS AREA ALONG WITH BLOWING AND
DRIFTING SNOW. NORTH WINDS WILL EVENTUALLY GUST TO OVER 40 MPH OVER
WESTERN SOUTH DAKOTA BY SUNDAY. CONSEQUENTLY...A WINTER STORM WATCH HAS
BEEN POSTED FOR THE WESTERN THIRD OF THE STATE FOR TONIGHT AND SUNDAY.

PERIODS OF COLD RAIN ALONG WITH THUNDERSTORMS WILL AFFECT THE CENTRAL
THROUGH NORTHEASTERN PARTS OF SOUTH DAKOTA. TEMPERATURES WILL BE IN THE
MID 30S TO MID 40S OVER THIS AREA THIS AFTERNOON THROUGH SUNDAY ALONG
WITH NORTHEAST TO NORTH WINDS INCREASING TO 15 TO 30 MPH. THE COLD RAIN
WILL BECOME MIXED WITH OR CHANGE TO WET SNOW OVER THE CENTRAL PART OF
THE STATE TONIGHT AND SUNDAY. THEREFORE...A WEATHER ADVISORY FOR
LIVESTOCK IS IN EFFECT THIS AFTERNOON THROUGH SUNDAY FOR CENTRAL THROUGH
NORTHEAST SOUTH DAKOTA.

KOSCIELSKI
Special weather statement, Apr 26, 2:42 PM CST, 57 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
240 PM CST SAT APR 26 1986

    ..TORNADO WATCH TIL 9 PM ......

AT 240 PM CST THERE WAS ONLY A SMALL AREA OF THUNDERSTORMS LOCATED IN
NORTH CENTRAL NEBRASKA NEAR O'NEILL NEBRASKA. THERE WERE NO OTHER SHOWERS
OR THUNDERSTORMS IN OR NEAR THE SIOUXLAND AREA.

TANNER
Special weather statement, Apr 26, 3:28 PM CST, 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
325 PM CST SAT APR 26 1986

...VERY STRONG THUNDERSTORMS MOVING INTO SOUTHEAST SOUTH DAKOTA...

AT 320 PM CST RADAR INDICATED VERY HEAVY AND SEVERE THUNDERSTORMS IN
NORTHEAST NEBRASKA ABOUT 60 MILES SOUTHWEST OF YANKTON SOUTH DAKOTA..
20 TO 30 MILES NORTH OF ONEIL NEBRASKA. AT 310 PM CST GOLF BALL SIZE
HAIL WAS REPORTED 15 MILES NORTH OF ONEIL NEBRASKA. THESE THUNDERSTORMS
WEREC MOVING TO THE NORTHEAST AT 35 MPH.

PEOPLE IN THE SOUTHEAST SOUTH DAKOTA COUNTIES OF SOUTHERN CHARLES-MIX
AND BON-HOMME SHLOUD BE ALERT UNTIL 430 PM CST FOR POSSIBLE LARGE HAIL
..VERY HEAVY RAIN..AND STRONG WINDS IN THUNDERSTORMS.

BEHREND

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 4:13 PM CSTSevere Thunderstorm WarningFSDHutchinson, Turner, Yankton62 min
Apr 26, 5:07 PM CSTSevere Thunderstorm WarningFSDLincoln, Minnehaha, Turner68 min
Apr 26, 5:27 PM CSTTornado WarningFSDTurner33 min
Apr 26, 5:41 PM CSTTornado WarningFSDLincoln34 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.