Alert archive / Minnesota / Tornado Warnings in 1986
Tornado Warning 6, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Apr 26, 1986, 6:55 PM CST for Nobles County, Rock County, Minnesota; Lyon County, Osceola County, Iowa. It was in force for 35 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
- Apr 26, 1986, 6:55 PM CST (00:55 UTC)
- Expired
- Apr 26, 1986, 7:30 PM CST
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lyon County, IA, Osceola County, IA, Nobles County, MN, Rock 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 |
|---|---|---|---|
| Apr 26, 7:10 PM CST | Thunderstorm Wind 0 | Nobles, 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 00:00Z, 0.9 hours before the alert went out and 239 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 270055 TORFSD MNC105-133-IAC119-143-270130- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 655 PM CST SAT APR 26 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 730 PM CST FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHWEST MINNESOTA...SOUTHERN NOBLES AND SOUTHERN ROCK NORTHWEST IOWA...LYON AND WESTERN OSCEOLA SOME OF THE CITIES INCLUDED IN NORTHWEST IOWA..ROCK RAPIDS.. GEORGE.. AND IN SOUTHWEST MINNESOTA..ELLSWORTH..ADRIAN..AND WORTHINGTON. AT 648 PM CST A TORNADO WAS REPORTED NEAR ROCK RAPIDS AND ANOTHER NEAR GEORGE IOWA. THE STORMS WERE MOVEING TO THE NORTHEAST AT 25 TO 30 MPH. IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A REINFORCED BUILDING. KOSCIELSKI
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 6:38 PM CST | Tornado Warning | FSD | Nobles | 37 min |
| Apr 26, 6:38 PM CST | Tornado Warning | FSD | Rock | 37 min |
| Apr 26, 6:46 PM CST | Tornado Warning | FSD | Nobles, Rock | 29 min |
| Apr 26, 7:58 PM CST | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 62 min |
| Apr 26, 7:58 PM CST | Severe Thunderstorm Warning | FSD | Murray | 62 min |
| Apr 26, 6:23 PM CST | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 67 min |
| Apr 26, 8:01 PM CST | Severe Thunderstorm Warning | FSD | Monona | 59 min |
Nearby
Tornado Warnings in Minnesota, 1986Tornado Warnings in Iowa, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.