Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 3, NWS Grand Rapids, MI

May 6, 1986Ingham County, Jackson County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 6, 1986, 11:36 AM EDT for Ingham County, Jackson County, Michigan. It was in force for 9 min.

The area

The counties it named.

The facts

Issued
May 6, 1986, 11:36 AM EDT (15:36 UTC)
Expired
May 6, 1986, 11:45 AM EDT
In force
9 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

Counties Ingham County, MI, Jackson 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, 3.6 hours before the alert went out and 86 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 1986-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 358 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, Detroit, MI at 12:00Z on 1986-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 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
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 KLAN 061536
SVRLAN
MIC065-075-061545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LANSING MI
1136 AM EDT TUE MAY 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1145 AM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTH CENTRAL LOWER MICHIGAN...SOUTHERN INGHAM AND NORTHERN JACKSON

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING FOR SOUTHERN INGHAM AND NORTHERN JACKSON COUNTIES.
THE WARNING IS VALID UNTIL 1145 AM EDT THIS MORNING. THE SEVERE
THUNDERSTORMS WERE LOCATED BY RADAR ALONG THE INGHAM..JACKSON
BORDERS AND WERE MOVING EAST AT AROUND 40 MPH. AT 1115 THE STORMS
WERE LOCATED ABOUT 40 MILES SOUTHEAST OF LANSING.
IF YOU ARE IN THE PATH OF THIS STORM..GET TO A REINFORCED BUILDING.
SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE HAIL..VERY
HEAVY RAIN..AND FREQUENT LIGHTNING. THEY CAN AND OCCASIONALLY DO
SPAWN A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE
LOOKOUT.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, May 6, 10:15 AM EDT, 1 hour 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1015 AM EDT TUE MAY 6 1986

...THUNDERSTORMS NEAR KALAMAZOO...

AT 1007 AM EDT RADAR FROM SOUTH BEND INDIANA INDICATED AN INTENSE
THUNDERSTORM SOUTHEAST OF THE CITY OF KALAMAZOO. THIS THUNDERSTORM IS
CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 40 MPH AS IT PASSES
OVERHEAD. THE THUNDERSTORM IS MOVING EAST AT 40 MPH.

IF THREATENING WEATHER IS SIGHTED BE PREPARED TO MOVE TO A @PLACE OF
SAFTEY.

CARLE
Special weather statement, May 6, 10:51 AM EDT, 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING MI
1030AM EDT TUE MAY 6 1986

...STRONG THUNDERSTORM OVER SOUTHERN LOWER MICHIGAN...

AT 1030 AM EDT RADAR SHOWED A VERY STRONG THUNDERSTORM OVER NORTHEAST
INGHAM COUNTY  AND A LINE OF THUNDERSTORMS EXTENDING FROM SOUTHWEST
EATON COUNTY  SOUTH THROUGH CALHOUN AND BRANCH COUNTIES INTO NORTH
INDIANA.
BATTLE CREEK EMERGENCY SERVICES REPORTED HEAVY RAIN AND FREQUENT
LIGHTNING IN A 1015 STORM BUT LITTLE WIND AND NO HAIL.
A STORM NEAR MARSHALL HAD 40 TO 45 MPH GUSTS AND SMALL HAIL HEAVY WITH
FREQUENT LIGHTNING.
REAL SMALL HAIL AND HEAVY RAIN WAS REPORTED IN SOUTHWEST BRANCH COUNTY
AT 1030.
THE STORMS WERE MOVING EAST NORTHEAST AT UP TO a40 MPH.
ENT

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 4:43 PM EDTSevere Thunderstorm WarningGRRCalhoun, Eaton27 min
May 6, 6:38 PM EDTSevere Thunderstorm WarningGRRCalhoun, Jackson52 min
May 6, 7:10 PM EDTSevere Thunderstorm WarningGRREaton, Jackson45 min
May 6, 7:10 PM EDTSevere Thunderstorm WarningGRRIngham65 min
May 6, 7:43 PM EDTSevere Thunderstorm WarningGRRIngham47 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1986Every severe thunderstorm warning 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.