Alert archive / Montana / Tornado Warnings in 1986
Tornado Warning 4, NWS Billings, MT
NWS Billings, MT issued this tornado warning at Sep 4, 1986, 7:56 PM MDT for Golden Valley County, Yellowstone County, Montana. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Sep 4, 1986, 7:56 PM MDT (01:56 UTC)
- Expired
- Sep 4, 1986, 8:30 PM MDT
- In force
- 34 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
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
Great_falls, MT (KTFX), launched 00:00Z, 1.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3555 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 112 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 KBIL 050158 TORBIL MTC037-111-050230- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE BILLINGS MT 756 PM MDT THU SEP 4 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF MONTANA...EXTREME SOUTHEAST GOLDEN VALLEY AND EXTREME NORTHWEST YELLOWSTONE...INCLUDING THE TOWN OF BROADVIEW. AT 750 PM MDT RADAR INDICATED A POSSIBLE TORNADO 10 MILES SOUTH OF LAVINA...IN EXTREME SOUTHEAST GOLDEN VALLEY COUNTY. MOVEMENT WAS SOUTHEAST AT AROUND 25 MPH. IF THREATENING WEATHER APPROACHES GO TO A SAFE PLACE IMMEDIATELY. NOLL
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 7:09 PM MDT | Tornado Warning | BYZ | Golden Valley | 36 min |
Nearby
Tornado Warnings in Montana, 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.