Alert archive / Michigan / Tornado Warnings in 1987

Tornado Warning 1, NWS Grand Rapids, MI

July 9, 1987Ionia County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Jul 9, 1987, 1:18 PM EDT for Ionia County, Michigan. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1987, 1:18 PM EDT (17:18 UTC)
Expired
Jul 9, 1987, 1:45 PM EDT
In force
27 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

County Ionia 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, 5.3 hours before the alert went out and 136 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 12:00Z on 1987-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1043 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 12:00Z on 1987-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939Sfc1 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
1043 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
22 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 KGRR 091718
TORGRR
MIC067-091745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
118 PM EDT THU JUL 9 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 145 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

CENTRAL LOWER MICHIGAN...IONIA

AT 110 PM EDT...IONIA COUTNY CIVIL DEFENSE REPORTED A FUNNEL CLOUD
3 MILES NORTHWEST OF THE CITY OF IONA AT HYNOR RD. THIS
THUNDERSTORM WAS MOVING EAST AT 25 MPH AND HAS ALSO PRODUCED ONE
HALF INCH HAIL.

IF YOU LIVE IN THE CITIES OF IONIA...LYONS...MUIR AND PEWAMO...TAKE
COVER IMMEDIATELY.

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 STURDY SHELTER
OR LIE FLAT IN A DITCH OR RAVINE.

CARLE

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, Jul 9, 12:16 PM EDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1215 PM EDT THU JUL 9 1987

...STRONG THUNDERSTORMS MOVING THROUGH THE GRAND RAPIDS AREA...

AT 1205 PM EDT...WEATHER RADAR INDICATED AN AREA OF STRONG
THUNDERSTORMS IN THE SOUTHERN HALF OF KENT COUNTY. THE THUNDERSTORMS
WERE MOVING EAST AT 25 MPH. PEA SIZE HAIL HAS BEEN REPORTED WITH THESE
THUNDERSTORMS. A REPORT OF WIND GUSTS TO NEAR 50 MPH PER HOUR AND AN
INCH AND ONE HALF OF RAAIN IN FIVE MINUTES WERE ALSO RECEIVED

PERSONS IN SOUTHERN KENT COUNTY SHOULD BE ON THE LOOKOUT FOR BRIEF HEAVY
RAINS...DANGEROUS LIGHTNING...SMALL HAIL AND SOME STRONG WIND GUSTS/IN
THESE STORMS AS THEY MOVE THROUGH THE AREA.

CARLE
Special weather statement, Jul 9, 12:22 PM EDT, 56 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED...
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1215 PM EDT THU JUL 9 1987

...STRONG THUNDERSTORMS MOVING THROUGH THE GRAND RAPIDS AREA...

AT 1205 PM EDT...WEATHER RADAR INDICATED AN AREA OF STRONG
THUNDERSTORMS IN THE SOUTHERN HALF OF KENT COUNTY. THE THUNDERSTORMS
WERE MOVING EAST AT 25 MPH. PEA SIZE HAIL HAS BEEN REPORTED WITH THESE
THUNDERSTORMS. A REPORT OF WIND GUSTS TO NEAR 50 MPH PER HOUR AND .72
INCHES OF RAINFALL IN FIVE MINUTES WERE ALSO RECEIVED.

PERSONS IN SOUTHERN KENT COUNTY SHOULD BE ON THE LOOKOUT FOR BRIEF HEAVY
RAINS...DANGEROUS LIGHTNING...SMALL HAIL AND SOME STRONG WIND GUSTS IN
THESE STORMS AS THEY MOVE THROUGH THE AREA.

CARLKE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 12:32 PM EDTSevere Thunderstorm WarningGRRIonia, Kent28 min
Jul 9, 12:43 PM EDTSevere Thunderstorm WarningGRRGratiot62 min
Jul 9, 12:51 PM EDTSevere Thunderstorm WarningGRRIsabella69 min
Jul 9, 1:43 PM EDTFlash Flood WarningGRRGratiot2 hr
Jul 9, 2:10 PM EDTSevere Thunderstorm WarningGRRIsabella18 min
Jul 9, 3:01 PM EDTSevere Thunderstorm WarningGRRCalhoun59 min
Jul 9, 3:02 PM EDTSevere Thunderstorm WarningGRRKalamazoo33 min
Jul 9, 3:18 PM EDTSevere Thunderstorm WarningGRRClinton57 min
Jul 9, 3:30 PM EDTSevere Thunderstorm WarningGRREaton, Ingham60 min
Jul 9, 4:27 PM EDTSevere Thunderstorm WarningGRRIngham33 min
Jul 9, 7:21 PM EDTSevere Thunderstorm WarningGRRIonia, Kent24 min
Jul 9, 7:45 PM EDTSevere Thunderstorm WarningGRRIonia, Kent30 min

Nearby

Tornado Warnings in Michigan, 1987Every tornado warning in 1987Tornadoes in 1987

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.