Alert archive / Minnesota / Tornado Warnings in 1987

Tornado Warning 9, NWS Twin Cities, MN

June 28, 19874 counties in Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 28, 1987, 5:43 PM CDT for 4 counties in Minnesota. It was in force for 27 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

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

Counties Anoka County, MN, Dakota County, MN, Ramsey County, MN, Washington County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 28, 6:00 PM CDT	Thunderstorm Wind 0	Washington, MN
Jun 28, 6:12 PM CDT	Thunderstorm Wind 0	Dakota, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 10.7 hours before the alert went out and 45 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: 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.

Issued	Product	Office	Counties	Lasted
Jun 28, 4:25 PM CDT	Tornado Warning	MPX	Lac qui Parle, Yellow Medicine	35 min
Jun 28, 5:02 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	38 min
Jun 28, 5:12 PM CDT	Tornado Warning	MPX	Anoka, Hennepin, Ramsey	28 min
Jun 28, 5:43 PM CDT	Tornado Warning	MPX	Hennepin	27 min
Jun 28, 6:01 PM CDT	Severe Thunderstorm Warning	MPX	Scott	44 min
Jun 28, 6:18 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	57 min
Jun 28, 6:34 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Wabasha	56 min

Nearby

Tornado Warnings in Minnesota, 1987 Every tornado warning in 1987 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.