Alert archive / Minnesota / Tornado Warnings in 1987

Tornado Warning 26, NWS Twin Cities, MN

July 27, 1987Goodhue County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 27, 1987, 4:02 PM CDT for Goodhue County, Minnesota. It was in force for 28 min. 1 report 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: Jul 27, 1987, 4:02 PM CDT (21:02 UTC)
Expired: Jul 27, 1987, 4:30 PM CDT
In force: 28 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Goodhue 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
Jul 27, 4:30 PM CDT	Thunderstorm Wind 0	Goodhue, 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, 9.0 hours before the alert went out and 85 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: 1473 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 272102
TORRST
MNC049-272130-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
402 PM CDT MON JUL 27 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL  430 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST MINNESOTA
          ...NORTHERN GOODHUE
 
RADAR INDICATED A TORNADO 10 MILES WEST OF RED WING MN MOVING
TO THE WEST TOWARD THE CITY OF CANNON FALLS.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 3:34 PM CDT	Tornado Warning	MPX	Goodhue	26 min
Jul 27, 3:40 PM CDT	Tornado Warning	MPX	Dakota	20 min
Jul 27, 3:59 PM CDT	Tornado Warning	MPX	Dakota	31 min
Jul 27, 4:32 PM CDT	Tornado Warning	MPX	Goodhue, Rice	43 min
Jul 27, 4:54 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	36 min
Jul 27, 5:14 PM CDT	Severe Thunderstorm Warning	MPX	Rice	46 min
Jul 27, 5:53 PM CDT	Severe Thunderstorm Warning	MPX	Scott	47 min
Jul 27, 6:52 PM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	53 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.