Alert archive / Minnesota / Tornado Warnings in 1987

Tornado Warning 3, NWS Twin Cities, MN

May 13, 1987Goodhue County, Minnesota

NWS Twin Cities, MN issued this tornado warning at May 13, 1987, 7:50 PM CDT for Goodhue County, Minnesota. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
May 13, 1987, 7:50 PM CDT (00:50 UTC)
Expired
May 13, 1987, 8:30 PM CDT
In force
40 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.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.8 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1987-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 732 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 00:00Z on 1987-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
732 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1878 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 140050
TORRST
MNC049-140130-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
750 PM CDT WED MAY 13 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL  830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST MINNESOTA
          ...NORTHERN GOODHUE
 
THIS WARNING INCLUDES THE CITIES OF CANNON FALLS AND RED WING. A
TORNADO WAS REPORTED IN SOUTH DAKOTA COUNTY AND MOVING EAST.
 
 
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.d..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.

IssuedProductOfficeCountiesLasted
May 13, 7:05 PM CDTSevere Thunderstorm WarningMPXCarver, Scott, Sibley55 min
May 13, 7:05 PM CDTSevere Thunderstorm WarningMPXMille Lacs55 min
May 13, 7:34 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin36 min
May 13, 7:47 PM CDTTornado WarningMPXDakota33 min
May 13, 8:08 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur37 min
May 13, 8:08 PM CDTSevere Thunderstorm WarningMPXRice37 min
May 13, 8:37 PM CDTSevere Thunderstorm WarningMPXDodge, Goodhue, Steele38 min
May 13, 8:37 PM CDTSevere Thunderstorm WarningMPXWaseca38 min
May 13, 9:40 PM CDTSevere Thunderstorm WarningMPXDodge, Olmsted50 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.