Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 110, NWS Sioux Falls, SD

July 18, 1986Lincoln County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 18, 1986, 4:54 PM CDT for Lincoln County, Minnesota. It was in force for 66 min.

The area

The counties it named.

The facts

Issued: Jul 18, 1986, 4:54 PM CDT (21:54 UTC)
Expired: Jul 18, 1986, 6:00 PM CDT
In force: 66 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Lincoln County, MN

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 12:00Z, 9.9 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: 2637 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 182154
SVRFSD
MNC081-182300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
454 PM CDT FRI JUL 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

SOUTHWEST MINNESOTA...NORTHERN LINCOLN

SOME OF THE CITIES INCLUDED IN WESTCENTRAL MINNESOTA ARE
HENDRICKS AND IVANHOE.

AT 452 PM CDT  RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES
NORTHEAST OF BROOKINGS NEAR ASTORIA MOVING EAST AT ABOUT
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.

KOSCIELSKI

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 18, 1:40 PM CDT, 3 hours 14 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
140 PM CDT FRI JUL 18 1986

AT 128 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN
CONTINUED OVER PARTS OF EASTERN SOUTH DAKOTA..AND SOUTHWEST
MINNEOSTA.

THESE THUNDERSTORMS WERE LOCATED FROM NEAR HAYTI..20 MILES SOUTH
OF WATERTOWN AND EASTWARD INTO SOUTHWEST MINNESOTA NEAR WILLMAR.

ALSO..INTENSE THUNDERSTORMS WERE LOCATED SOUTH OF A LOWER BRULE
/HURON LINE.

VERY HEAVY RAINS ARE POSSIBLE WITH THESE STORMS.  CONDITIONS
ARE SUCH THAT THUNDERSTORMS SHOULD CONTINUE THROUGHOUT THE
DAY IN SOUTH DAKOTA.  SMALL STREAM..LOWLAND..AND URBAN FLOODING
ARE POSSIBLE WITH THESE STORMS.  PERSONS IN THESE AREAS
SHOULD BE AWARE OF RAPIDLY CHANGING WEATHER CONDITIONS AND
BE PREPARED TO TAKE PROTECTIVE ACTION.

SMALL HAIL..STRONG GUSTY WINDS..AND FREQUENT LIGHTNING STRIKES
ARE ALSO POSSIBLE WITH THESE STORMS.

OTHERWISE..THUNDERSTORMS WERE OCCURRING IN CENTRAL SOUT?H DAKOTA.

ALL MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR.
KRAUSE/MILLER

Special weather statement, Jul 18, 2:07 PM CDT, 2 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
205 PM CDT FRI JUL 18 1986

...CANCEL SEVERE THUNDERSTORM WARNING FOR AURORA COUNTY...

...SEVERE THUNDERSTORM WATCH NUMBER 388 IN EFFECT UNTIL 900 PM CDT
FOR PARTS OF EASTERN SOUTH DAKOTA...

THE SEVERE THUNDERSTORM WHICH MOVED INTO NORTHERN AURORA COUNTY AT
130 PM CDT WEAKENED CONSIDERABLY BY 200 PM OVER NORTHERN AURORA COUNTY.
THIS STORM THEN MOVED NORTHEAST INTO JERAULD COeUNTY. THEREFORE THE
SEVERE THUNDERSTORM WARNING FOR AURORA COUNTY HAS BEEN CANCELED.

THUNDERSTORMS WILL CONTINUE TO BE A THREAT FOR THE COUNTIES OF BRULE
AND AURORA FOR THE REMAINDER OF THIS AFTERNOON AND TONIGHT.
KAPELA

Local storm report, Jul 18, 2:34 PM CDT, 2 hours 20 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
231 PM CDT FRI JUL 18 1986

TIME            EVENT                  LOCATION

120 PM CDT      FUNNEL CLOUD           TWELVE MILES SOUTHEAS{T OF GANN
                                       VALLEY..IN NORTHEAST BRULE
                                       COUNTY. REPORTED BY WEATHER
                                       SPOTTER.

WEILAND

Special weather statement, Jul 18, 2:43 PM CDT, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
240 PM CDT FRI JUL 18 1986

...SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN
SOUTH DAKOTA UNTIL 9 PM CDT...

AT 230 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN
CONTINUED OVER PARTS OF EASTERN SOUTH DAKOTA..AND
WEST CENTRAL MINNESOTA.

IN SOUTH DAKOTA..THE STRONGEST STORM WAS JUST SOUTHWEST OF
WESSINGTON SPRINGS..OR 35 MILES SOUTHWEST OF HURON.

IN MINNESOTA..THE STRONGEST STORM WAS 10 MILES NORTHWEST
OF MONTEVIDEO.

VERY HEAVY RAINS ARE POSSIBLE WITH THESE STORMS.  CONDITIONS
ARE SUCH THAT THUNDERSTORMS SHOULD CONTINUE THROUGHOUT THE
DAY IN SOUTH DAKOTA.  SMALL STREAM..LOWLAND..AND URBAN FLOODING
ARE POSSIBLE WITH THESE STORMS.  PERSONS IN THESE AREAS
SHOULD BE AWARE OF RAPIDLY CHANGING WEATHER CONDITIONS
AND BE PREPARED TO TAKE PROTECTIVE ACTION.

SMALL HAIL..STRONG GUSTY WINDS..AND FREQUENT LIGHTNING STRIKES
ARE ALSO POSSIBLE WITH THESE STORMS.

OTHERWISE..THUNDERSTORMS WERE OCCURRING IN CENTRAL SOUTH DAKOTA.
THESE WERE IN A 50 MILE WIDE AREA FROM 30 MILES WEST OF
ABERDEEN TO 15 MILES NORTH OF WINNER.

ALL MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR.
KRAUSE/MILLER

Special weather statement, Jul 18, 4:38 PM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
440 PM CDT FRI JUL 18 1986

THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLE HAIL WERE MOVING INTO
THE WEST PART OF GREGORY COUNTY IN SOUTHCENTRAL SOUTH DAKOTA.
A STRONGER STORM WAS JUST SOUTHWEST OF BUTTE NEBRASKA OR NORTHERN HOLT
COUNTY NEBRASKA. THESE STORMS WERE MOVING EAST NORTHEAST AT ABOUT
25 MPH AND WILL BE MOVING THROUGH MOST OF GREGORY AND THE SOUTH PART
OF CHARLES MIX COUNTIES BWTWEEN 440 PM AND 540 PM CDT.

SOME TOWNS EFFECTED MAY BE GREGORY..BONESTEEL AND PICKSTOWN.
KOSCIELSKI

Special weather statement, Jul 18, 4:44 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
442 PM CDT FRI JUL 18 1986

...CANCEL THE SEVERE THUNDERSTORM WARNING FOR
HAMLIN AND SOUTHERN CODINGTON COUNTIES.  THIS
WARNING HAD BEEN IN EFFECT UNTIL 5 PM CDT...

KRAUSE/STOREY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 5:55 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	65 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.