Alert archive / Minnesota / Tornado Warnings in 1987

Tornado Warning 7, NWS Twin Cities, MN

June 28, 1987Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 28, 1987, 4:25 PM CDT for Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1987, 4:25 PM CDT (21:25 UTC)
Expired
Jun 28, 1987, 5:00 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Lac qui Parle County, MN, Yellow Medicine 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

Aberdeen, SD (KHON), launched 12:00Z, 9.4 hours before the alert went out and 188 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, Aberdeen, SD at 12:00Z on 1987-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 487 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, Aberdeen, SD at 12:00Z on 1987-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
487 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
1671 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
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 WarningMPXHennepin27 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.