Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 101, NWS Sioux Falls, SD

July 14, 1986Minnehaha County, Moody County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 14, 1986, 6:50 AM CDT for Minnehaha County, Moody County, South Dakota. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: Jul 14, 1986, 6:50 AM CDT (11:50 UTC)
Expired: Jul 14, 1986, 7:45 AM CDT
In force: 55 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Minnehaha County, SD, Moody 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

Aberdeen, SD (KHON), launched 00:00Z, 11.8 hours before the alert went out and 177 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2450 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 156 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 141150
SVRFSD
MNC081-117-SDC011-099-101-141245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
650 AM CDT MON JUL 14 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 745 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST MINNESOTA...SOUTHERN LINCOLN AND PIPESTONE
EAST CENTRAL SOUTH DAKOTA...SOUTHEAST BROOKINGS...NORTHEAST 
 MINNEHAHA AND MOODY

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ELKTON..
FLANDREAU..DELL RAPIDS AND SOUTHWEST MINNESOTA LAKE BENTON..
PIPESTONE.

AT 640 AM CDT  RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM 10 MILES EAST OF BROOKINGS SOUTH DAKOTA TO 20 MILES NORTHWEST
OF SIOUX FALLS SOTUH DAKOTA MOVING EASTSOUTHEAST AT 30 MPH.

 AT 640 AM CDT 60 MPH WINDS REPORTED AT BROOKINGS SOUTH DAKOTA
DOWNING TREES AND POWER LINES.

IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A RE<INFORCED
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.

BEHREND

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, Jul 14, 1:48 AM CDT, 5 hours 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 AM CDT MON JUL 14 1986

...INTENSE THUNDERSTORMS WERE CONTINUING OVER SOUTH CENTRAL SOUTH
DAKOTA...

INTENSE THUNDERSTORMS CONTINUE OVER NORTHERN GREGORY AND NORTHERN
CHARLES-MIX COUNTIES OF SOUTH CENTRAL SOUTH DAKOTA. AT 140 AM CDT
RADAR INDICATED INTENSE THUNDERSTORMS FROM 40 MILES SOUTHWEST OF
MITCHELL NEAR PLATTE TO 65 MILES SOUTHWEST OF MITCHELL..OR 5 NORTH
OF GREGORY. THESE THUNDERSTORMS WERE MOVING SOUTHSOUTHEAST AT 20
MPH. VERY HEAVY RAIN..HAIL AND STRONG GUSTY WINDS ARE POSSIBLE
WITH THESE THUNDERSTORMS. THE VERY HEAVY RAIN AND SLOW MOVEMENT
OF THESE THUNDERSTORMS MAY PRODUCE SMALL STREAN AND STREET FLOODING
ALONG WITH PONDING OF WATER IN LOW LYING AREAS. PEOPLE IN GREGORY..
CHARLES MIX AMD DOUGLAS COUTNIES SHOULD BE ALERT UNTIL 4 AM CDT.

AT 1218 AM CDT PEA-SIZE HAIL AND .26 OF AN INCH OF RAIN WAS REPORTED
AT CHAMBERLAIN SOUTH DAKOTA.

BEHREND

Special weather statement, Jul 14, 4:37 AM CDT, 2 hours 13 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
430 AM CDT MON JUL 14 1986

...SEVERE THUNDERSTORM WATCH FOR EASTERN SOUTH DAKOTA TIL 1000 AM CDT...

AT 430 AM CDT...THERE WERE WIDELY SCATTERED THUNDERSTORMS WITH VERY
HEAVY RAIN...IN NORTHEASTERN AND SOUTHEASTERN SOUTH DAKOTA.
THE THUNDERSTORMS WERE IN A 115 MILES WIDE BAND WHICH EXTENDED
FROM ABERDEEN SOUTH TO JUST NORTH OF YANKTON.

THE STRONGEST STORMS WERE LOCATED NEAR MILLER 35 MILES NORTHWEST OF
HURON AND NEAR PICKSTOWN 40 MILES SOUTHWEST OF MITCHELL.

VERY HEAVY RAIN...STRONG WINDS...AND SMALL HAIL ARE POSSIBLE FROM
THESE STORMS.

MOVEMENT WAS SOUTHEAST AT 30 MILES AN HOUR.
REYNOLDS

Special weather statement, Jul 14, 5:30 AM CDT, 1 hour 20 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
529 AM CDT MON JUL 14 1986

...SEVERE THUNDERSTORM WATCH FOR EASTERN SOUTH DAKOTA TIL 1000 AM CDT...

AT 525 AM CDT...THERE WERE SCATTERED THUNDERSTORMS WITH VERY
HEAVY RAIN...IN NORTHEASTERN SOUTH DAKOTA.
THE THUNDERSTORMS WERE IN A 50 MILE WIDE BAND WHICH EXTENDED
THE MINNESOTA BORDER WEST ACCROSS WATERTOWN THEN ACCROSS HURON
TO 30 MILES SOUTHWEST OF HURON.
THE STRONGEST STORM WAS 25 MILES NORTHEAST OF HURON NEAR WILLOW LAKE.

VERY HEAVY RAIN...STRONG WINDS...AND SMALL HAIL ARE POSSIBLE FROM
THESE STORMS.

MOVEMENT WAS SOUTHEAST AT 30 MILES AN HOUR.
REYNOLDS

Special weather statement, Jul 14, 5:47 AM CDT, 1 hour 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
545 AM CDT MON JUL 14 1986

...SEVERE THUNDERSTORM WATCH NUMBER 371 CANCELLED...

THE SEVERE THUNDERSTORM WATCH WHICH WAS OUT FOR EASTERN SOUTH DAKOTA
THIS MORNING HAS BEEN CANCELLED. HOWEVER SCATTERED THUNDERSTORM..SOME
WITH STRONG GUSTY WINDS..SMALL HAIL AND VERY HEAVY RAIN ARE EXPECTED
TO CONTINUE THIS MORNING OVER THE SOUTHEAST AND EAST CENTRAL PART OF
THE STATE.

AT 535 AM CDT RADAR INDICATED  A 15 MILE WIDE LINE OF THUNDERSTORMS
WITH VERY HEAVY RAIN FROM 15 MILES SOUTH SOUTHWEST OF WATERTOWN SOUTH
DAKOTA TO 25 MILES EAST SOUTHEAST OF HURON SOUTH DAKOTA. THESE
THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT 30 MPH AND ARE
EXPECTED TO BE MOVING INTO THE BROOKINGS AND MADISON AREAS BY 600 AM
CDT.

STRONG GUSTY WINDS..SMALL HAIL AND VERY HEAVY RAIN WILL BE POSSIBLE AS
THESE STORMS MOVE THROUGH.

BIER

Local storm report, Jul 14, 6:32 AM CDT, 18 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
630 AM CDT MON JUL 14 1986

TIME            EVENT                            LOCATION

1218 AM CDT     PEA SIZE HAIL. 0.26 INCH OF      CHAMB1ERLAIN SD
                OF RAIN IN 30 MINUTES

420 AM CDT      PEA SIZE HAIL                    LAKE ANDES SD

615 AM CDT      VERY RAIN                        MADISON SD

BEHREND

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 12:22 AM CDT	Severe Thunderstorm Warning	FSD	Brule	38 min
Jul 14, 12:22 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	68 min
Jul 14, 12:55 AM CDT	Severe Thunderstorm Warning	FSD	Gregory	35 min
Jul 14, 6:50 AM CDT	Severe Thunderstorm Warning	FSD	Brookings	55 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1986 Every 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.