Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 60, NWS Twin Cities, MN

June 18, 1986Dakota County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 1986, 3:51 AM CDT for Dakota County, Scott County, Minnesota. It was in force for 54 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1986, 3:51 AM CDT (08:51 UTC)
Expired
Jun 18, 1986, 4:45 AM CDT
In force
54 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Dakota County, MN, Scott 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

Minneapolis, MN (KSTC), launched 00:00Z, 8.9 hours before the alert went out and 32 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, Minneapolis, MN at 00:00Z on 1986-06-18Temperature 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, Minneapolis, MN at 00:00Z on 1986-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.19395878Sfc1 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
2042 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 180851
SVRMSP
MNC019-053-139-037-180945-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
351 AM CDT WED JUN 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 445 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

CENTRAL MINNESOTA...NORTHERN CARVER...SOUTHWEST HENNEPIN...SCOTT AND 
 DAKOTA

AT 350 AM SEVERE THUNDERSTORMS WERE OCCURRING WRIGHT...CARVER...
AND HENNEPIN COUNTIES OF THE TWIN CITIES METRO AREA.  THESE
STORMS MAY PRODUCE LARGE HAIL AND DAMAGING WINDS AS WELL AS
DANGEROUS LIGHTNING.  MOVEMENT OF THESE SEVERE THUNDERSTORMS IS
TO THE SOUTHEAST AT 35 MILES AN HOUR.  CITIES INCLUDED IN THIS
WARNING ARE SAVAGE...FARMINGTON...AND ROSEMOUNT.

REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE
HAIL AND FREQUENT LIGHTNING STRIKES. ALSO SEVERE THUNDERSTORMS CAN
AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NOR ADVANCE
WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF
SAFETY IF ONE IS SPOTTED.

PAULSON

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

Local storm report, Jun 17, 10:00 PM CDT, 5 hours 51 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
905 PM CDT TUE JUN 17 1986

TIME        EVENT
355 PM CDT  GOLF BALL SIZE HAIL NORTHWEST POPE COUNTY. CONTINUED
UNTIL 4 02PM CDT

410 PM UNTIL 435PM CDT MARBLE TO GOLF BALL SIZE HAIL COVER GROUND
JUST NORTHWEST OF GLENWOOD

532 PM CDT PEA SIZE HAIL AT NORTH EDGE OF NEW LONDON..KANDIYOHI
COUNTY

535 PM CDT GOLF BALL SIZE HAIL OVER LAKE MINNEWASKA..GLENWOOD..POPE
COUNTY

545PM CDT PEA SIZxE HAIL AT BROOTEN..STEARNS COUNTY

619PM CDT PEA SIZE HAIL 1 1/2 MI. NORTH OF GROVE CITY..MEEKER COUNTY

645PM CDT PEA SIZE HAIL IN NEW LONDON AREA..KANDIYOHI COUNTY.

DE VOE
Special weather statement, Jun 18, 3:08 AM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
305 AM CDT WED JUN 18 1986

....VERY STRONG THUNDERSTORMS APPROACHING THE WESTERN TWIN CITIES
    METRO AREA...
AT 3AM NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF VERY STRONG
THUNDERSTORMS BUILDING SOUTHEAST ACROSS WRIGHT COUNTY OF CENTRAL
MINNESOTA.  THESE THUNDERSTORMS WERE GENERALLY IN AN AREA ABOUT 20 TO
40 MILES NORTHWEST OF THE TWIN CITIES.  THE LEADING EDGE OF THESE
THUNDERSTORMS WAS APPROACHNG THE SOUTHWEST CORNER OF HENNEPIN COUNTY
IN THE INDEPENDENCE..MAPLE PLAIN AREA.  THEY EXTENDED NORTHWEST
ACROSS WRIGHT COUNTY TOWARD ANNANDALE.  VERY STRONG THUNDERSTORMS
WERE ALSO OVER MUCH OF NORTHERN MEEKER COUNTY IN THE LITCHFIELD..
WATKINS AREA.

THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 TO 35 MPH AND
SOME WILL BE MOVING INTO SOUTHWEST HENNEPIN AND NORTHERN CARVER
COUNTIES BETWEEN 310AM AND 4AM.
<
IF THREATENING WEATHER APPROACHES YOU SEEK SH=ELTER AND IF POSSIBLE
RELAY ANY SEVERE WEATHER REPORTS TO LOCAL LAW ENFORCEMENT OFFICIALS.
PAULSON

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 17, 11:57 PM CDTSevere Thunderstorm WarningMPXPope48 min
Jun 18, 12:57 AM CDTSevere Thunderstorm WarningMPXPope, Stearns53 min
Jun 18, 1:50 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns60 min
Jun 18, 2:26 AM CDTSevere Thunderstorm WarningMPXWright64 min
Jun 18, 2:50 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns40 min
Jun 18, 3:34 AM CDTSevere Thunderstorm WarningMPXWright26 min
Jun 18, 3:34 AM CDTSevere Thunderstorm WarningMPXCarver, Hennepin56 min
Jun 18, 3:51 AM CDTSevere Thunderstorm WarningMPXCarver, Hennepin29 min

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.