Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 167, NWS Sioux Falls, SD

August 16, 1986Lincoln County, Lyon County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 16, 1986, 5:47 PM CDT for Lincoln County, Lyon County, Minnesota. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Aug 16, 1986, 5:47 PM CDT (22:47 UTC)
Expired
Aug 16, 1986, 6:45 PM CDT
In force
58 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Lincoln County, MN, Lyon 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, 10.8 hours before the alert went out and 193 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 1986-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1455 joules per kilogram.LCLLFCEL10008507005003002001001 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 1986-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
1455 J/kg
Mixed-layer CIN
-380 J/kg
Mixed-layer LCL
1485 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
56 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 162247
SVRFSD
MNC081-083-162345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
547 PM CDT SAT AUG 16 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST MINNESOTA...SOUTHEAST LINCOLN AND SOUTHERN LYON

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE TYLER..FLORENCE..
RUSSELL..AND TRACY.

AT 545 PM CDT  RADAR INDICATED A SEVERE THUNDERSTORM NEAR TYLER
IN SOUTHWEST MINNESOTA..ABOUT 50 MILES NORTHEAST OF SIOUX FALLS..
SOUTH DAKOTA. THIS THUNDERSTORM WAS MOVING EAST ABOUT 20 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.

RYRHOLM

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, Aug 16, 5:43 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
540 PM CDT SAT AUG 16 1986

...THUNDERSTORM DEVELOPING RAPIDLY IN SOUTHWEST MINNESOTA...

AT 540 PM CDT A STRONG THUNDERSTORM HAS BEEN DEVELOPING RAPIDLY JUST
NORTH OF TYLER IN SOUTHWEST MINNESOTA..OR ABOUT 50 MILES NORTHEAST OF
SIOUX FALLS..SOUTH DAKOTA. THIS THUNDERSTORM WILL BE QUITE CAPABLE
OF PRODUCING VERY HEAVY RAIN..SOME HAIL..GUSTY WINDS..AND SHARP
LIGHTNING AS IT MOVES EAST AT ABOUT 20 MPH.

OTHER STRONG THUNDERSTORMS ARE LIKELY TO DEVELOP FROM EAST TO
WEST ALONG AND NEAR A SLOW MOVING FRONT EXTENDING FROM SOUTHWEST
MINNESOTA THROUGH SOUTHEAST SOUTH DAKOTA THIS EVENING. SOME OF
THESE THUNDERSTORMS COULD BE SEVERE.

RYRHOLM

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.