Alert archive / Minnesota / Tornado Warnings in 1987

Tornado Warning 10, NWS Twin Cities, MN

June 28, 1987Hennepin County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 28, 1987, 5:43 PM CDT for Hennepin County, Minnesota. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1987, 5:43 PM CDT (22:43 UTC)
Expired
Jun 28, 1987, 6:10 PM CDT
In force
27 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Hennepin 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 12:00Z, 10.7 hours before the alert went out and 20 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 12:00Z on 1987-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 139 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, Minneapolis, MN at 12:00Z on 1987-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
139 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1385 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
126 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 KMSP 282243
TORMSP
MNC053-003-123-037-163-282310-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
543 PM CDT SUN JUN 28 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 610 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

EAST CENTRAL MINNESOTA...EXTREME EASTERN HENNEPIN...EXTREME SOUTHERN 
 ANOKA...RAMSEY...NORTHERN DAKOTA AND WASHINGTON


SEVERAL REPORTS OF TORNADO FROM MINNEAPOLIS AND ST PAUL AT 536 PM
MOVING EAST AT 30 MPH. NUMEROUS REPORTS OF 1/2 INCH TO 1 INCH HAIL
AND WIND GUSTS IN EXCESS OF 50 MPH.

THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE IN
THE PATH OF A TORNADEO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE.
OTHERWISE..GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR
POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES FOR A
REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

RND

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 4:25 PM CDTTornado WarningMPXLac qui Parle, Yellow Medicine35 min
Jun 28, 5:02 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin38 min
Jun 28, 5:12 PM CDTTornado WarningMPXAnoka, Hennepin, Ramsey28 min
Jun 28, 5:43 PM CDTTornado WarningMPXAnoka, Dakota, Ramsey, Washington27 min
Jun 28, 6:01 PM CDTSevere Thunderstorm WarningMPXScott44 min
Jun 28, 6:18 PM CDTSevere Thunderstorm WarningMPXDakota57 min
Jun 28, 6:34 PM CDTSevere Thunderstorm WarningMPXGoodhue, Wabasha56 min

Nearby

Tornado Warnings in Minnesota, 1987Every tornado warning in 1987Tornadoes in 1987

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.