Alert archive / Michigan / Tornado Warnings in 1986
Tornado Warning 12, NWS Detroit, MI
NWS Detroit, MI issued this tornado warning at Jul 18, 1986, 5:00 PM EDT for Roscommon County, Michigan. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1986, 5:00 PM EDT (21:00 UTC)
- Expired
- Jul 18, 1986, 6:00 PM EDT
- In force
- 60 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
County Roscommon County, MI
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
Detroit, MI (KFNT), launched 12:00Z, 9.0 hours before the alert went out and 203 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
- 1483 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 879 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.1
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 Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 4:55 PM EDT | Severe Thunderstorm Warning | DTX | Roscommon | 60 min |
| Jul 18, 6:54 PM EDT | Severe Thunderstorm Warning | DTX | Huron | 66 min |
| Jul 18, 7:22 PM EDT | Severe Thunderstorm Warning | DTX | Sanilac, Tuscola | 38 min |
| Jul 18, 7:57 PM EDT | Severe Thunderstorm Warning | DTX | Huron, Sanilac, Tuscola | 63 min |
Nearby
Tornado Warnings in Michigan, 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.