Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 23, NWS Sioux Falls, SD

May 8, 1986Lincoln County, South Dakota; Lyon County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 8, 1986, 6:07 PM CDT for Lincoln County, South Dakota; Lyon County, Iowa. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
May 8, 1986, 6:07 PM CDT (23:07 UTC)
Expired
May 8, 1986, 6:50 PM CDT
In force
43 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Lyon County, IA, Lincoln 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, 11.1 hours before the alert went out and 224 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, Omaha, NE at 12:00Z on 1986-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Omaha, NE at 12:00Z on 1986-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3612 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
93 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 082307
SVRFSD
SDC083-IAC119-090015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
607 PM CDT THU MAY 8 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHEAST SOUTH DAKOTA...NORTHEAST LINCOLN
NORTHWEST IOWA...WESTERN LYON

SOME OF THE CITIES INCLUDED IN THIS SEVERE THUNDERSTORM WARNING
ARE CANTON SOUTH DAKOTA...INWOOD IOWA...AND LARCHWOOD IOWA.

 AT 555 PM CDT VERY STRONG WINDS..FREQUENT LIGHTNING..AND VERY
HEAVY RAIN WERE REPORTED NEAR FAIRVIEW SOUTH DAKOTA..OR ABOUT
30 MILES SOUTHSOUTHEAST OF SIOUX FALLS SOUTH DAKOTA.

THE SEVERE THUNDERSTORM ASSOCIATED WITH THIS REPORT WAS MOVING
NORTH AT 25 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.

THEOPHILUS

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 8, 2:42 PM CDT, 3 hours 25 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
240 PM CDT THU MAY 8 1986

AT 230 PM CDT...SCATTERED INTENSE THUNDERSTORMS..WITH VERY HEAVY RAIN..
CONTINUED OVER PARTS OF CENTRAL AND NORTHEAST CENTRAL SOUTH DAKOTA.

THE STRONGEST THUNDERSTORMS WERE OCCURRING WEST OF THE MISSOURE RIVER FROM
NEAR SPARKS IN NORTH CENTAL NEBRASKA TO NEAR LA PLANT IN DEWEY COUNTY.
ALSO NORTH OF A PIERRE/WATERTOWN LINE.

RESIDENTS SHOULD BE ON THE ALERT FOR THREATING WEATHER CONDITIONS AND
SHOULD SEEK A PLACE OF SAFTEY IF NEEDED.

MOVEMENT WAS NORTH AT 30 MILES AN HOUR.

MILLER
Special weather statement, May 8, 3:20 PM CDT, 2 hours 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
320 PM CST THU MAY 8 1986

...INTENSE THUNDERSTORMS IN SOUTHCENTRAL SOUTH DAKOTA...

AT 315 PM CDT INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED TO
DEVELOP OVER SOUTHCENTRAL SOUTH DAKOTA IN TRIPP COUNTY. THE THUNDER/
STORMS EXTENDED FROM 15 MILES NORTHWEST OF WINNER SOUTH DAKOTA TO 15
MILES SOUTH OF WINNER. THE THUNDERSTORMS WERE MOVING NORTH AT 30 MPH.

THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN..GUSTY WINDS..AND
SMALL HAIL AS THEY MOVE NORTH THROUGH TRIPP COUNTY AFFECTING THE TOWNS
OF WINNER AND IDEAL SOUTH DAKOTA UNTIL 420 PM CDT.
THEOPHILUS
Special weather statement, May 8, 3:32 PM CDT, 2 hours 35 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
340 PM CDT THU MAY 8 1986

AT 325 PM CDT...SCATTERED INTENSE THUNDERSTORMS..WITH VERY HEAVY RAIN..
CONTINUED OVER PARTS OF CENTRAL AND NORTHEAST CENTRAL SOUTH DAKOTA.

THE STRONGEST THUNDERSTORMS WERE OCCURRING WEST OF THE MISSOURE RIVER FROM
NEAR SPARKS IN NORTH CENTAL NEBRASKA TO NEAR PRESHO IN LYMAN COUNTY..
ALSO NORTH OF A PIERRE/WATERTOWN LINE.

RESIDENTS SHOULD BE ON THE ALERT FOR THREATING WEATHER CONDITIONS AND
SHOULD SEEK A PLACE OF SAFTEY IF NEEDED.

MOVEMENT WAS NORTH AT 30 MILES AN HOUR.

MILLER
Special weather statement, May 8, 3:36 PM CDT, 2 hours 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
335 PM CDT THU MAY 8 1986

AT 330 PM CDT SHOWERS AND THUNDERSTORMS WERE WIDESPREAD ACROSS THE
SIOUXLAND AREA. THE HEAVIEST PRECIPITATION WAS IN THUNDERSTORMS
LOCATED 50 MILES NORTH OF SIOUX CITY NEAR ROCK VALLEY..50 MILES
NORTHEAST OF SIOUX CITY NEAR CHEROKEE..AND 50 MILES SOUTHEAST OF
SIOUX CITY JUST NORTH OF MISSOURI VALLEY.

THESE THUNDERSTORMS CONTINUE MOVING NORTH AT 025 TO 30 MILES AN HOUR
AND HAVE THE PRODUCED STRONG GUSTY WINDS..SMALL HAIL AND BRIEF HEAVY
RAIN.

KROPP
Special weather statement, May 8, 5:03 PM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
500 PM CDT THU MAY 8 1986

...WEATHER ADVISORY FOR LIVESTOCK WEST TONIGHT...
...TORNADO WATCH FOR PARTS OF THE EAST AND CENTRAL THIS EVENING...

THE NATIONAL WEATHER SERVICE HAS CONTINUED A WEATHER ADVISORY FOR
TRAVELERS FOR THE WESTERN FOURTH OF SOUTH DAKOTA. COLD RAIN IS FORECAST
TO BE COMBINED WITH LOW TEMPERATURES IN THE MIDDLE TO UPPER 30S AND
NORTH WINDS OF 10 TO 20 MPH. SOME SNOW IS ALSO EXPECTED IN THE BLACK
HILLS WITH ACCUMULATIONS OF 2 TO 4 INCHES POSSIBLE ALONG WITH LOW
TEMPERATURES NEAR 30 DEGREES. THESE CODITIONS WILL PRESENT A DANGER TO
THE LIFE OF YOUNG LIVESTOCK.

A TORNADO WATCH IS IN EFFECT FOR PARTS OF THE EAST AND CENTRAL THIS
EVENING. SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL AND
LOCALLY HEAVY RAIN PRODUCING LOW LAND FLOODING ARE POSSIBLE OVER PARTS
OF EAST AND CENTRAL SOUTH DAKOTA TONIGHT.
BIER
Special weather statement, May 8, 5:36 PM CDT, 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
535 PM CDT THU MAY 8 1986

...A TORNADO WATCH UNTILL 11 PM CDT FOR PARTS OF THE SIOULAND AREA...

AT 435 PM CDT SHOWERS AND THUNDERSTORMS WERE IN A 25 MILE WIDE BAND
FROM NEAR YANKTON SOUTH DAKOTA OR ABOUT 60 MILES NORTHWEST OF SIOUX
CITY..TO 30 MILES NORTH OF SIOUX CITY TO NEAR CHEROKEE IOWA. THESE
SHOWERS AND THUNDERSTORMS WERE MOVING NORTH AT 30 MILES AN HOUR.

NO 6SEVERE WEATHER HAS BEEN REPORTED WITH THIS BAND.

THE SIOUX CITY METRO AREA IS NOT INCLUDED IN THE TORNADO WATCH AREA.

QUINN

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 8:27 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix53 min
May 7, 9:23 PM CDTSevere Thunderstorm WarningFSDBon Homme57 min
May 7, 9:53 PM CDTSevere Thunderstorm WarningFSDYankton67 min
May 7, 9:53 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Gregory67 min
May 7, 10:25 PM CDTSevere Thunderstorm WarningFSDHutchinson, Turner65 min
May 7, 10:25 PM CDTSevere Thunderstorm WarningFSDClay, Lincoln65 min
May 7, 11:06 PM CDTSevere Thunderstorm WarningFSDLincoln, Minnehaha59 min
May 7, 11:06 PM CDTSevere Thunderstorm WarningFSDDouglas59 min
May 7, 11:06 PM CDTSevere Thunderstorm WarningFSDMcCook59 min
May 7, 11:32 PM CDTSevere Thunderstorm WarningFSDLincoln, Turner59 min
May 8, 6:01 PM CDTSevere Thunderstorm WarningFSDBrookings29 min
May 8, 6:20 PM CDTSevere Thunderstorm WarningFSDMinnehaha30 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1986Severe Thunderstorm Warnings in Iowa, 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.