Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Apr 26, 1986, 6:38 PM CST for Nobles County, Minnesota; Lyon County, Osceola County, Iowa. It was in force for 37 min. 3 reports 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, 6:38 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
Counties Lyon County, IA, Osceola County, IA, Nobles 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, 6:42 PM CST | Tornado F2 | Lyon, IA | |
| Apr 26, 6:45 PM CST | Tornado F2 | Nobles, MN | |
| 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, 0.6 hours before the alert went out and 236 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 6:55 PM CST | Tornado Warning | FSD | Nobles, Rock | 35 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 Iowa, 1986Tornado 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.