Alert archive / Michigan / Tornado Warnings in 1986

Tornado Warning 3, NWS Gaylord, MI

July 18, 1986Oscoda County, Michigan

NWS Gaylord, MI issued this tornado warning at Jul 18, 1986, 6:11 PM EDT for Oscoda County, Michigan. It was in force for 34 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1986, 6:11 PM EDT (22:11 UTC)
Expired
Jul 18, 1986, 6:45 PM EDT
In force
34 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Oscoda 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

Sault Ste Marie, MI (KSSM), launched 12:00Z, 10.2 hours before the alert went out and 199 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, Sault Ste Marie, MI at 12:00Z on 1986-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 412 joules per kilogram.LCLLFCEL10008507005003002001001 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, Sault Ste Marie, MI at 12:00Z on 1986-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
412 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KAPN 182229 COR
TORAPN
MIC135-182245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTION...OMIT THE TOWN OF WHITTEMORE FROM WARNING
NATIONAL WEATHER SERVICE ALPENA MI
611 PM EDT FRI JUL 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 645 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

NORTHEAST LOWER MICHIGAN...OSCODA

AT 605 PM EDT RADAR INDICATED A POSSIBLE TORNADO 10 MILES NORTHEAST
OF MIO...MOVING TO THE SOUTHEAST AT 35 MILES AN HOUR.

IF YOU ARE IN THE PATH OF THIS TORNADO..GO TO A BASEMENT SHELTER IF
AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR.  DO NOT STAY IN A CAR OR MOBILE HOME..FIND A REINFORCEDF
SHELTER OR LIE FLAT IN A DITCH OR RAVINE.
STAY TUNED TO YOUR LOCAL RADIO OR TELEVISION STATION..OR TO NOAA
WEATHER RADIO FOR THE LATEST INFORMATION.

RUNYON

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 9:50 PM EDTTornado WarningAPXLuce25 min
Jul 18, 1:00 PM EDTSevere Thunderstorm WarningAPXChippewa, Luce, Mackinac60 min
Jul 18, 4:08 PM EDTSevere Thunderstorm WarningAPXOscoda57 min
Jul 18, 4:43 PM EDTSevere Thunderstorm WarningAPXAlcona, Alpena32 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.