Alert archive / Minnesota / Tornado Warnings in 1986

Tornado Warning 4, NWS Sioux Falls, SD

April 26, 1986Rock County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at Apr 26, 1986, 6:38 PM CST for Rock County, Minnesota. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Apr 26, 1986, 6:38 PM CST (00:38 UTC)
Expired
Apr 26, 1986, 7:15 PM CST
In force
37 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Rock 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 00:00Z, 0.6 hours before the alert went out and 219 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 00:00Z on 1986-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1986-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
518 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
397 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 6:38 PM CSTTornado WarningFSDNobles37 min
Apr 26, 6:46 PM CSTTornado WarningFSDNobles, Rock29 min
Apr 26, 6:55 PM CSTTornado WarningFSDNobles, Rock35 min
Apr 26, 7:58 PM CSTSevere Thunderstorm WarningFSDJackson, Nobles62 min
Apr 26, 7:58 PM CSTSevere Thunderstorm WarningFSDMurray62 min

Nearby

Tornado Warnings in Minnesota, 1986Every tornado warning in 1986Tornadoes in 1986

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.