Alert archive / Michigan / Tornado Warnings in 1986

Tornado Warning 9, NWS Detroit, MI

June 11, 1986Lapeer County, Michigan

NWS Detroit, MI issued this tornado warning at Jun 11, 1986, 10:15 PM EDT for Lapeer County, Michigan. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 11, 1986, 10:15 PM EDT (02:15 UTC)
Expired
Jun 11, 1986, 11:00 PM EDT
In force
45 min
Issued by
NWS Detroit, MI
Area
Whole counties

County Lapeer County, MI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jun 11, 10:15 PM EDTThunderstorm Wind 0Lapeer, MI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Detroit, MI (KFNT), launched 00:00Z, 2.3 hours before the alert went out and 44 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 KFNT 120215
TORFNT
MIC087-120300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE FLINT MI
1015 PM EDT WED JUN 11 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 1100 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

EAST CENTRAL LOWER MICHIGAN...LAPEER

NUMEROUS REPORTS HAVE BEEN RECEIVED FROM RELIABLE SOURCES OF
TORNADOES AND FUNNEL CLOUDS OVER NORTHERN OAKLAND COUNTY MOVING
NORTHEASTWARD INTO LAPEER COUNTY.

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 REINFORCED
SHELTER 6OR LIE FLAT IN A DITCH OR RAVINE.

FRUEHAUF

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, 7:36 PM EDT, 2 hours 39 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, 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 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
Special weather statement, Jun 11, 9:03 PM EDT, 1 hour 12 minutes before
%%%%%%%%%%
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
850 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..HAS BEEN EXTENDED UNTIL 1000PM FOR
      PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...

SEVERE THUNDERSTORMS CONTINUE TO DEVELOP OVER PORTIONS OF SOUTHERN
LOWER MICHIGAN. SINCE 8PM RADAR HAS INDICATED POSSIBLE TORNADOES IN
BARRY AND KENT COUNTIES. 1 INCH HAIL AND 60 MPH WINDS WERE
ALSO REPORTED SINCE 8PM IN MUSKEGON COUNTY.

SCATTERED THUNDERSTORMS THROUGHOUT SOUTH AND CENTRAL LOWER MICHIGAN
MAY CONTINUE PRODUCING SEVERE WEATHER UNTIL 10PM.

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

DGH
Special weather statement, Jun 11, 9:27 PM EDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANN ARBOR MI
930 PM EDT WED JUN 11 1986

   ...TORNADO WATCH..NUMBER 249..IS IN EFFECT UNTIL 1000PM FOR
      PORTIONS OF CENTRAL AND SOUTHERN LOWER MICHIGAN...

NUMEROUS TORNADOES..FUNNEL CLOUDS..LARGE HAIL..AND STRONG
WINDS CONTINUE TO BE REPORTED OR INDICATED BY RADAR OVER SOUTH AND
CENTRAL LOWER MICHIGAN.

PERSONS ARE ADVISED TO BE ON THE ALERT FOR THREATENING WEATHER
AND BE PREPARED TO MOVE$ TO A PLACE OF SAFETY IMMEDIATELY.

PLEASE STAY TUNED TO NOAA WEATHER RADIO..OR YOUR LOCAL RADIO OR TV
STATION..FOR FURTHER STATEMENTS AND WARNINGS.

DGH
Special weather statement, Jun 11, 9:47 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT MI
930 PM EDT WED JUN 11 1986

    .....TORNADO WATCH EXTENDED UNTIL 10PM EDT.....

NUMEROUS TORNADOES..FUNNEL CLOUDS..LARGE HAIL.. AND STRONG WINDS ARE
BEING REPORTED OR INDICATED BY RADAR ACROSS CENTRAL AND SOUTHERN LOWER
MICHIGAN..  TO THE SOUTHWEST AND SOUTH OF EAST CENTRAL LOWER MICHIGAN.

AT 930 PM EDT.. RADAR INDICATES WIDESPREAD SHOWERS WITH EMBEDDED
THUNDERSTORMS OVER EAST CENTRAL LOWER MICHIGAN TO THE RIGHT OF A LINE
FROM HARBOR BEACH TO FLINT.. MOVING EASTWARD AT 20 TO 25 MPH.. WITH
HEAVIER SHOWERS AND THUNDERSTORMS TO THE SOUTH AND SOUTHEAST OF FLINT.

ANOTHER AREA OF SHOWERS AND THUNDERSTORMS IS MOVING INTO EAST CENTRAL
LOWER MICHIGAN.. EXTENDING FROM SAGINAW TO BATTLE CREEK MOVING EASTWARD
AT 20 TO 30 MPH. THE SOUTHERN PORTION OF THIS AREA HAS TRIGGERED
REPORTS OF SEVERE THUNDERSTORMS..FUNNEL CLOUDS.. AND TORNADOES.
LOCAL FLOODING OF UNDERPASSES AND LOW AREAS CAN BE EXPECTED TO
CONTINUE TO BE A PROBLEM AS THIS SECOND NEXT AREA MOVES ACROSS
EAST CENTRAL LOWER MICHIGAN.

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
Local storm report, Jun 11, 9:49 PM EDT, 26 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE DETROIT MI
945PM EDT WEDSAT JUN 11 1986

 TIME         EVENT
900 PM EDT  GENESEE CENTER DISPATCH REPORTED A FUNNEL CLOUD SOUTHEAST
            OF THE CITY OF PONTIAC
 NEAR M59 AND I75 IN OAKLAND COUNTY.

930 PM EDT  OAKLAND COUNDY SHERIFF REPORTED A TORNADO TOUCHDOWN NORTH
            OF THE CITY OF PONTIAC NEAR THE COUNTY BOURDER LINE WITH
            LAPEER COUNTY.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 8:59 PM EDTTornado WarningDTXOakland46 min
Jun 11, 9:56 PM EDTTornado WarningDTXOakland49 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.