Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 65, NWS Sioux Falls, SD

June 22, 1986Union County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 22, 1986, 12:07 AM CDT for Union County, South Dakota. It was in force for 68 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 22, 1986, 12:07 AM CDT (05:07 UTC)
Expired
Jun 22, 1986, 1:15 AM CDT
In force
68 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Union 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 22, 12:30 AM CDTThunderstorm Wind 61Union, 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

Omaha, NE (KOAX), launched 00:00Z, 5.1 hours before the alert went out and 170 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 00:00Z on 1986-06-22Temperature 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 00:00Z on 1986-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3594 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
148 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 KSUX 220511
SVRSUX
SDC127-220615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
1207 AM CDT SUN JUN 22 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 115 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY OF

SOUTHEAST SOUTH DAKOTA...UNION

AT 1200 PM CDT THE VERMILLION POLICE DEPARTMENT REPORTED
THUNDERSTORMS WITH ESTIMATED WIND GUSTS OF 70 MILES AN HOUR.

THESE THUNDERSTORMS WERE MOVING EAST AT 35 MILES AN HOUR.

REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAINS THAT CAN
QUICKLY FLOOD LOW LYING AREAS.

IF THREATENING WEATHER APPROACHES GET TO A REINFORCED SHELTER
IMMEDIATELY.

PLEASE ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

 MOBILE HOMES ARE ESPECIALLY VUNERABLE TO OVERTURNING IN HIGH
 WINDS AND5 SHOULD BE ABANDONED IN FAVOR OF A REINFORCED SHELTER.

SHERLIN

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, Jun 21, 9:03 PM CDT, 3 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
900 PM CDT SAT JUN 21 1986

..TORNADO WATCH NUMBER 284 CANCELLED FOR MUCH OF EASTERN SOUTH
DAKOTA...

THE TORNADO WATCHV THAT WAS IN EFFECT FOR MUCH OF EASTERN SOUTH DAKOTA
UNTIL 1000 PM CDT HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH HAS
BEEN ISSUED IN ITS PLACE FOR SOUTHEAST SOUTH DAKOTA..SOUTHWEST
MINNESOTA AND NORTHWEST IOWA.
WEILAND
Local storm report, Jun 21, 9:51 PM CDT, 2 hours 16 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
950 PM CDT SAT JUN 21 1986

STORM REPORTS RELAYED VIA KELO-TV IN SIOUX FALLS SOUTH DAKOTA

915 PM CDT        BASEBALL SIZED HAIL AT COLMAN SOUTH DAKOTA IN
                  WESTERN MOODY COUNTY..OR ABOUT 25 MILES NORTH OF
                  SIOUX FALLS.

                  3 1/3 INCHES OF RAIN REPORTED SINCE THIS AFTERNOON AT
                  MADISON SOUTH DAKOTA IN LAKE COUNTY..OR 30 MILES NORTH
                  NORTHWEST OF SIOUX FALLS.
THEOPHILUS
Special weather statement, Jun 21, 9:54 PM CDT, 2 hours 13 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
950 PM CDT SAT JUN 21 1986

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF
EASTERN SOUTH DAKOTA UNTIL 300 AM CDT SUN JUNE 22...

AT 935 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED
OVER SOUTHERN LAKE AND EASTERN MCCOOK COUNTIES.

HAIL..STRONG WINDS..AND HEAVY RAIN ARE POSSIBLE WITH THESE
THUNDERSTORMS.  LOCALLY HEAVY RAINS MAY CAUSE SMALL STREAM
AND LOWLAND FLOODING.

THESE THUNDERSTORMS WERE MOVING EAST AT 15 MILES AN HOUR.

OTHERWISE..THUNDERSTORMS WITH HEAVY RAIN WERE OVER CENTRAL
SOUTH DAKOTA IN A 50 MILE WIDE AREA FROM 60 MILES NORTHWEST
OF PIERRE TO THE NEBRASKA BORDER 30 MILES SOUTHWEST OF WINNER.
THESE THUNDERSTORMS EXTENDED INTO NORTHERN NEBEASKA..AND

THE STRONGEST STORMS IN THIS AREA WERE ABOUT TO MOVE INTO
GREGORY AND TRIPP COUNTIES.

MOVEMENT OF THESE STORMS WAS EASTNORTHEAST AT 15 MILES AN HOUR.

KRAUSE/MORRIS
Special weather statement, Jun 21, 10:42 PM CDT, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1043 PM CDT SAT JUN 21 1986

.... SEVERE THUNDERSTORM WATCH TILL 3 AM....

AT 1035 PM CDT RADAR SHOWED AN LINE OF THUNDERSTORMS AND RAINSHOWERS
OVER CENTRAL NEBRASKA EXTENDING UP INTO SOUTH DAKTOA. THE LINE WAS
LOCATED FROM ABOUT HURON SOUTH DAKATOA TO NORTH OF GRAND ISLAND NEBRASKA.

THIS LINE OF THUNDERSTORMS WAS MOVING EAST AT 30 MILES AN HOUR.

NO OTHER THUNDERSTORMS WERE IN OR CXLOSE TO THE SIOUXLAND AREA AT THIS
TIME.

TANNER
Special weather statement, Jun 21, 11:15 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1115 PM CDT SAT JUN 21 1986

.... SEVERE THUNDERSTORM WATCH TILL 3 AM....

AT 1105 PM CDT RADAR SHOWED AN LINE OF STRONG THUNDERSTORMS AND SHOWERS
OVER EASTERN NEBRASKA EXTENDING UP INTO SOUTHEAST SOUTH DAKOTA. THE LINE
WAS LOCATED FROM SIOUX FALLS SOUTH DAKATOA TO GRAND ISLAND NEBRASKA.

THIS LINE OF THUNDERSTORMS WAS MOVING EAST AT 30 MILES AN HOUR.

NO OTHER THUNDERSTORMS WERE IN
OR CLOSE TO THE SIOUXLAND AREA AT THIS
TIME.

TANNER
Local storm report, Jun 21, 11:48 PM CDT, 19 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1135 PM CDT SAT JUN 21 1986

934 PM CDT      PEA SIZE HAIL..HEAVY RAIN AND GUSTS TO 30 MPH AT
                BALTIC..MINNEHAHA COUNTY.

1000 PM CDT     WATER OVER HIGHWAY 77 IN SOUTHERN MOODY COUNTY.

1015 PM CDT     TREE LIMBS UP TO 4 INCHES IN DIAMETER BROKEN OFF EAST
                OF GARRETSON.

1100 PM CDT     2.30 INCHES OF RAIN AT CHESTER..LAKE COUNTY..IN SEVERAL
                HOURS

1100 PM CDT     PEA SIZE HAIL AND VERY HEAVY RAIN IN SOUTHERN MOODY
                COUNTY.

1105 PM CDT     40 MPH WINDS AND HEAVY RAIN AT LUVERNE MN.
1110 PM CDT     30 TO 35 MPH WINDS IN GREGORY COUNTY.

WEILAND

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 7:26 PM CDTSevere Thunderstorm WarningFSDLake64 min
Jun 21, 8:32 PM CDTSevere Thunderstorm WarningFSDLake, Moody58 min
Jun 21, 9:15 PM CDTSevere Thunderstorm WarningFSDMinnehaha, Moody60 min
Jun 21, 9:33 PM CDTSevere Thunderstorm WarningFSDLake, McCook57 min
Jun 21, 9:58 PM CDTSevere Thunderstorm WarningFSDTripp62 min
Jun 21, 10:44 PM CDTSevere Thunderstorm WarningFSDMinnehaha61 min
Jun 22, 12:06 AM CDTSevere Thunderstorm WarningFSDClay, Lincoln, Turner, Yankton69 min
Jun 22, 12:06 AM CDTSevere Thunderstorm WarningFSDHutchinson, McCook, Minnehaha69 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.