Alert archive / Michigan / Tornado Warnings in 1986

Tornado Warning 3, NWS Detroit, MI

May 6, 1986Macomb County, Saint Clair County, Michigan

NWS Detroit, MI issued this tornado warning at May 6, 1986, 12:58 PM EDT for Macomb County, Saint Clair County, Michigan. It was in force for 47 min.

The area

The counties it named.

The facts

Issued: May 6, 1986, 12:58 PM EDT (16:58 UTC)
Expired: May 6, 1986, 1:45 PM EDT
In force: 47 min
Issued by: NWS Detroit, MI
Area: Whole counties

Counties Macomb County, MI, Saint Clair 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, 5.0 hours before the alert went out and 53 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 358 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KARB 061658
TORDTW
MIC099-147-061745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE DETROIT MI
ISSUED BY ANN ARBOR MI
1258 PM EDT TUE MAY 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO AND SPECIAL 
MARINE WARNING EFFECTIVE UNTIL 145 PM EDT FOR PEOPLE IN THE 
FOLLOWING COUNTIES OF

SOUTHEAST LOWER MICHIGAN...MACOMB AND ST. CLAIR
...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTIES JUST MENTIONED

A LINE OF SEVERE THUNDERSTORMS MOVING THROUGH THE DETROIT AREA HAS
PRODUCED SEVERAL SIGHTINGS OF FUNNEL CLOUDS. THESE STORMS ARE
MOVING INTO MACOMB AND ST CLAIR COUNTIES AT 40 MPH.

IF YOU ARE IN THE PATH OF THIS STORM..GET TO A REINFORCED BUILDING.
SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WIND..LARGE HAIL..VERY
HEAVY RAIN..AND FREQUENT LIGHTNING. THEY OCCASIONALLY DO SPAWN A
TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE .LOOKOUT.

DGH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 11:56 AM EDT	Severe Thunderstorm Warning	DTX	Livingston, Washtenaw	44 min
May 6, 11:56 AM EDT	Severe Thunderstorm Warning	DTX	Lenawee	44 min
May 6, 12:28 PM EDT	Tornado Warning	DTX	Oakland, Wayne	50 min
May 6, 3:19 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	51 min
May 6, 4:25 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	35 min
May 6, 5:22 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	38 min
May 6, 6:01 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	59 min
May 6, 7:45 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	45 min

Nearby

Tornado Warnings in Michigan, 1986 Every tornado warning in 1986 Tornadoes 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.