Alert archive / Michigan / Tornado Warnings in 1986

Tornado Warning 7, NWS Detroit, MI

June 11, 1986Oakland County, Michigan

NWS Detroit, MI issued this tornado warning at Jun 11, 1986, 8:59 PM EDT for Oakland County, Michigan. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Jun 11, 1986, 8:59 PM EDT (00:59 UTC)
Expired
Jun 11, 1986, 9:45 PM EDT
In force
46 min
Issued by
NWS Detroit, MI
Area
Whole counties

County Oakland 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 00:00Z, 1.0 hours before the alert went out and 8 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, Detroit, MI at 00:00Z on 1986-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1637 joules per kilogram.LCLEL10008507005003002001001 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, Detroit, MI at 00:00Z on 1986-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.1939587897Sfc1 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
1637 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
547 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDTW 120059
TORDTW
MIC125-120145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT MI
859 PM EDT WED JUN 11 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 945 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHEAST LOWER MICHIGAN...OAKLAND

AT 855 PM EDT RADAR INDICATED AND PUBLIC REPORTED A TORNADO
JUST SOUTHEAST OF THE CITY OF PONTIAC NEAR HARTLAND IN SOUTHEAST
MICHIGAN. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.

IF THREATENING WEATHER APPROACHES GO TO A BASEMENT SHELTER IF
AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A
REINFORCED BUILDING. STAY TUNED TO NOAA WEATHER RADIO..COMMERCIAL
RADIO..OR TELEVISION FOR LATER STATEMENTS OR POSSIBLE WARNINGS.

BAILEY/RUSSOY

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 11, 5:17 PM EDT, 3 hours 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
515 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..IS IN EFFECT UNTIL 9 PM FOR MOST
          PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TONIGHT FOR MOST
OF THE COUNTIES IN CENTRAL AND SOUTHERN LOWER MICHIGAN.  THE COUNTIES
AFFECTED INCLUDE THE MAJOR CITIES AND METROPOLITAN AREAS OF MUSKEGON..
GRAND RAPIDS..LANSING..SAGINAW..ST JOSPEH..KALAMAZOO..JACKSON..FLINT..
..ANN ARBOR..MOUNT CLEMENS AND DETROIT.

AT 510 PM WEATHER SERVICE RADAR SHOWED A STRONG THUNDERSTORM WITH
HEAVY RAIN JUST WEST OF LANSING WHILE ADDITIONAL THUNDERSTORMS
CONTINUED TO DEVELOP OVER SOUTHWEST SECTIONS OF MICHIGAN. VERY INTENSE
THUNDERSTORMS WERE ALSO REPORTED OVER EASTERN PORTIONS OF WISCONSIN
JUST MOVING OVER LAKE MICHIGAN. THE STORMS WERE MOVING TO THE NORTHEAST
AT 35 MPH.

THESE STORMS WILL CONTINUE TO MOVE INTO VERY MOIST AND UNSTABLE
AIR OVER THE STATE THIS EVENING AND SEVERE WEATHER REMAINS A
THREAT.

VERY HEAVY RAIN..DANGEROUS LIGHTNING..STRONG WINDS..AND LARGE
HAIL ARE POSSIBLE AS THESE THUNDERSTORMS PASS OVERHEAD. PERSONS
IN AND CLOSE TO THE TORNADO WATCH ARkEA ARE URGED TO STAY TUNED
TO NOAA WEATHER RADIO..LOCAL RADIO OR TV..FOR FURTHER STATEMENTS
OR POSSIBLE WARNINGS.

JJK
Special weather statement, Jun 11, 6:18 PM EDT, 2 hours 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT MI
600 PM EDT WED JUN 11 1986

    .....TORNADO WATCH REMAINS IN EFFECT TILL 9PM EDT.....

AS OF OF 600 PM EDT THE INITIAL AREA OF SHOWERS AND THUNDERSTORMS WHICH
CROSSED EAST CENTRAL LOWER MICHIGAN THIS AFTERNOON HAD MOVED OFF TO THE
EAST WHILE A SECOND AREA OF SHOWERS AND LOCALLY STRONG THUNDERSTORMS HAS
DEVELOPED OVER CENTRAL LOWER MICHIGAN DURING THE PAST TWO HOURS.

THIS AREA EXTENDS FROM SAGINAW BAY SOUTHWESTWARD TO JUST EAST OF
LANSING AS MOSTLY RAINSHOWERS INTO AN AREA OF STRONG THUNDERSTORMS
WHICH HAVE CROSSED THE LANSING AREA DURING THE PAST HOUR MOVING TO
THE EAST NORTHEAST AT 20 TO 25 MPH. THESE STORMS CAN BE EXPECTED TO
BE ACCOMPANIED BY LOCALLY VERY HEAVY RAINS AND DANGEROUS LIGHTNING..
WITH STRONG WINDS... LARGE HAIL... AND TORNADOES POSSIBLE.

TORNADO WATCH NUMBER 249 REMAINS IN EFFECT UNTIL 9PM EDT AND
PERSONS IN AND CLOSE TO THE WATCH AREA ARE URGED TO STAY TUNED TO NOAA
WEATHER RADIO OR LOCAL RADIO AND TV FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.

FF
Special weather statement, Jun 11, 6:31 PM EDT, 2 hours 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
630 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..IS IN EFFECT UNTIL 9 PM FOR MOST
          PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...
   ...FLASH FLOOD WARNING IS IN EFFECT UNTIL 745PM FOR PERSONS
      IN INGHAM COUNTY...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TONIGHT FOR MOST
OF THE COUNTIES IN CENTRAL AND SOUTHERN LOWER MICHIGAN.  THE COUNTIES
AFFECTED INCLUDE THE MAJOR CITIES AND METROPOLITAN AREAS OF MUSKEGON..
GRAND RAPIDS..LANSING..SAGINAW..ST JOSPEH..KALAMAZOO..JACKSON..FLINT..
..ANN ARBOR..MOUNT CLEMENS AND DETROIT.

VERY HEAVY RAIN OVER MUCH OF INGHAM COUNTY HAS RESULTED IN THE
ISSUANCE OF A FLASH FLOOD WARNING.  WELL OVER 3 INCHES OF RAIN HAS
FALLEN THIS AFTERNOON IN THE LANSING AREA. AT 620PM HEAVY RAIN WAS
CONTINUING IN THE AREA. ADDITIONAL HEAVY RAINFALL WILL BE POSSIBLE
FOR MUCH OF THE EVENING.

AT 6PM INTENSE THUNDERSTORMS WERE MOVING NORTHEAST THROUGH EXTREME
SOUTHERN LAKE MICHIGAN. STRONG THUNDERSTORMS ALSO WERE OCCURING
FROM NEAR SAGINAW THROUGH LANSING AND ON SOUTHWEST INTO INDIANA.
ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED THIS EVENING.

VERY HEAVY RAIN..DANGEROUS LIGHTNING..STRONG WINDS..AND LARGE
HAIL ARE POSSIBLE AS THESE THUNDERSTORMS PASS OVERHEAD. PERSONS
IN AND CLOSE TO THE TORNADO WATCH AREA ARE URGED TO STAY TUNED
TO NOAA WEATHER RADIO..LOCAL RADIO OR TV..FOR FURTHER STATEMENTS
OR POSSIBLE WARNINGS.

DGH
Special weather statement, Jun 11, 7:23 PM EDT, 1 hour 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
720 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..IS IN EFFECT UNTIL 9 PM FOR MOST
          PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...
   ...FLASH FLOOD WARNING IS IN EFFECT UNTIL 745PM FOR PERSONS
      IN INGHAM COUNTY...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TONIGHT FOR MOST
OF THE COUNTIES IN CENTRAL AND SOUTHERN LOWER MICHIGAN.  THE COUNTIES
AFFECTED INCLUDE THE MAJOR CITIES AND METROPOLITAN AREAS OF MUSKEGON..
GRAND RAPIDS..LANSING..SAGINAW..ST JOSPEH..KALAMAZOO..JACKSON..FLINT..
..ANN ARBOR..MOUNT CLEMENS AND DETROIT.

VERY HEAVY RAIN OVER MUCH OF INGHAM COUNTY HAS RESULTED IN THE
ISSUANCE OF A FLASH FLOOD WARNING.  WELL OVER 3 INCHES OF RAIN HAS
FALLEN THIS AFTERNOON IN THE LANSING AREA. GRAND LEDGE..JUST WEST OF
LANSING..REPORTED 4.20 INCHES OF RAIN THIS AFTERNOON. THE RAIN HAS
DECREASED BUT MORE SHOWERS AND THUNDERSTORMS ARE LIKELY THIS EVENING
WHICH MAY PRODUCE ADDITIONAL HEAVY RAINFALL.

AT 7PM SCATTERED SHOWERS AND THUNDERSTORMS WERE OCCURING OVER
SOUTHERN LOWER MICHIGAN AND MUCH OF LAKE MICHIGAN. THE STORMS ARE
MOVING TO THE NORTHEAST AT ABOUT 30 MPH.

VERY HEAVY RAIN..DANGEROUS LIGHTNING..STRONG WINDS..AND LARGE
HAIL ARE POSSIBLE THIS EVENING. PERSONS IN AND CLOSE TO THE TORNADO
WATCH AREA ARE URGED TO STAY TUNED TO NOAA WEATHER RADIO..OR THIER
LOCAL RADIO OR TV STATION..FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS.

DGH
Special weather statement, Jun 11, 7:36 PM EDT, 1 hour 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT MI
720 PM EDT WED JUN 11 1986

    .....TORNADO WATCH REMAINS IN EFFECT TILL 9PM EDT.....

AS OF 700 PM EDT AN AREA OF SHOWERS AND THUNDERSTORMS EXTENDS FROM
SOUTHERN SAGINAW BAY SOUTHWESTWARD AND FROM JUST EAST OF LANSING TO JUST
EAST OF FLINT MOVING EASTWARD AT 20 TO 25 MPH. WHILE THIS AREA HAS
WEAKENED SLIGHTLY OVER THE PAST HOUR THE POTENTIAL FOR ISOLATED SEVERE
STORMS CONTINUES INTO THE LATE EVENING HOURS.

WIDESPREAD LIGHT SHOWERS WITH LOCALLY HEAVIER EMBEDDED SHOWERS AND
THUNDERSTORMS WILL CAUSE PREVIOUSLY FLOODED UNDERPASSES AND LOW AREAS
TO REMAIN FLOODED OR FLOOD ALL OVER AGAIN. 1.24 INCHES OF RAIN HAD
FALLEN AT FLINTS BISHOP AIRPORT AS OF 5PM WITH SPOTTY REPORTS OF LOCALLY
HEAVIER RAINFALL AMOUNTS RECEIVED.

TORNADO WATCH NUMBER 249 REMAINS IN EFFECT UNTIL 9PM EDT AND
PERSONS IN AND CLOSE TO THE WATCH AREA ARE URGED TO STAY TUNED TO NOAA
WEATHER RADIO OR LOCAL RADIO AND TV FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.

FF
Special weather statement, Jun 11, 8:39 PM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
720 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..IS IN EFFECT UNTIL 9 PM FOR MOST
          PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...
   ...FLASH FLOOD WARNING IS IN EFFECT UNTIL 1000PM FOR PERSONS
      IN INGHAM COUNTY...
   ...SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 900PM FOR
      PERSONS IN EASTERN MUSKEGON AND NEWAYGO COUNTIES...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TONIGHT FOR MOST
OF THE COUNTIES IN CENTRAL AND SOUTHERN LOWER MICHIGAN.  THE COUNTIES
AFFECTED INCLUDE THE MAJOR CITIES AND METROPOLITAN AREAS OF MUSKEGON..
GRAND RAPIDS..LANSING..SAGINAW..ST JOSPEH..KALAMAZOO..JACKSON..FLINT..
..ANN ARBOR..MOUNT CLEMENS AND DETROIT.

THE FLASH FLOOD WARNING FOR INGHAM COUNTY HAS BEEN EXTENDED UNTIL
10PM. MORE SHOWERS AND THUNDERSTORMS ARE LIKELY IN THE AREA AND MAY
PRODUCE ADDITIONAL HEAVY RAINFALL. MOTORISTS..AND PERSONS LIVING
NEAR STREAMS OR IN LOW LYING AREAS SHOULD BE VERY CAUTIOUS THIS
EVENING.

AT ABOUT 815PM AN OBSERVER IN SOUTHWESTERN RAVENNA TOWNSHIP IN
MUSKEGON COUNTY REPORTED 60 MPH WINDS AND 1 INCH HAIL. THIS STORM
WAS MOVING TO THE NORTH AT 45 MPH.

SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE AND DEVELOP
ACROSS MUCH OF LOWER MICHIGAN.

VERY HEAVY RAIN..DANGEROUS LIGHTNING..STRONG WINDS..AND LARGE
HAIL ARE POSSIBLE THIS EVENING. PERSONS IN AND CLOSE TO THE TORNADO
WATCH AREA ARE URGED6 TO STAY TUNED TO NOAA WEATHER RADIO..OR THEIR
LOCAL RADIO OR TV STATION..FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS.

DGH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 9:56 PM EDTTornado WarningDTXOakland49 min
Jun 11, 10:15 PM EDTTornado WarningDTXLapeer45 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.