Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 31, NWS Grand Rapids, MI

September 10, 1986Kent County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 10, 1986, 9:34 PM EDT for Kent County, Michigan. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Sep 10, 1986, 9:34 PM EDT (01:34 UTC)
Expired
Sep 10, 1986, 10:15 PM EDT
In force
41 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

County Kent 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, 1.6 hours before the alert went out and 176 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 1986-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 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 00:00Z on 1986-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 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
200 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Sep 10, 5:48 PM EDT, 3 hours 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
550 PM EDT WED SEP 10 1986

...MINOR FLOODING CONTINUES TO BE A POSSIBLITY THIS AFTERNOON
IN SOUTHWEST LOWER MICHIGAN AS SHOWERS AND THUNDERSTORMS CONTINUE...

AT 540 PM EDT RADAR INDICATED A FEW INTENSE THUNDERSTORMS ONE LOCATED
IN CALHOUN COUNTY JUST NORTH OF BATTLE CREEK ANOTHER LOCATED JUST OFF-
SHORE OF SOUTHHAVEN MICHIGAN IN VAN BUREN COUNTY AND ANOTHER IN THE
ALLEGAN COUNTY AREA OF SAUGATUCK. STILL ANOTHER STRONG CELL IS JUST
TO THE NORTH OF GRAND RAPIDS. THESE STORMS CAN PRODUCE HEAVY RAIN,
STRONG GUSTY WINDS..DANGEROUS LIGHTNING AND SOME SMALL HAIL. SOME STREET
FLOODING IS OCCURING IN MANY AREAS OF SOUTHWEST LOWER MICHGAN AND WILL
CONTINUE TO DO SO AS THESE STORMS CONTINUE TONIGHT. ALSO LOW LYING AREAS
AND AND SMALL STREAMS MAY FLOOD DURING THE EVENING AND NIGHTTIME HOURS.

PERSONS IN LOW LAND AREAS SHOULD BE ON THE ALERT FOR POSSIBLE MINOR
FLOODING AND PERSONS DRIVING SHOULD WATCH FOR STREET FLOODING,
ESPECIALLY UNDER OVERPASSES AND SLICK ROADS THIS AFTERNOON AND TONIGHT.
PERSONS SHOULD NOT DRIVE VEHICLES INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT AND THE CAR MAY STVALL.

THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT
AND MOST OF THURSDAY AS A LOW PRESSURE AREA MOVES TOWARD THE GREAT
LAKES OUT OF THE NORTHERN PLAINS STATES.

DBS
Special weather statement, Sep 10, 5:58 PM EDT, 3 hours 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING, MI
551 PM EDT WED SEP 10 1986

...INTENSE THUNDERSTORM MOVING INTO NORTHERN CALHOUN AND SOUTHERN
   EATON COUNTIES...

AT 550 PM EDT RADAR INDICATED AN INTENSE THUNDERSTORM 10 MILES NORTH OF
BATTLE CREEK MOVING EAST AT 35 MPH.  THIS THUNDERSTORM WILL MOVE ACROSS
NORTHERN CALHOUN AND SOUTHERN EATON COUNTIES BETWEEN 551 PM AND 630 PM
EDT.  TORRENTIAL RAIN...FREQUENT LIGHTNING..AND STRONG WINDwS HAVE BEEN
REPORTED WITH THIS STORM. PEOPLE IN BELLEVUE AND OLIVET ARE NEAR THE
PATH OF THIS STRONG THUNDERSTORM.  BE ALERT FOR RAPID FLOODING OF
STREETS AND LOW-LYING AREAS AS THIS STORM PASSES.

BUNTING
Special weather statement, Sep 10, 7:05 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
705 PM EDT WED SEP 10 1986

...MINOR FLOODING CONTINUES TO BE A POSSIBLITY THIS EVENING AND TONIGHT..
IN SOUTHWEST LOWER MICHIGAN AS SHOWERS AND THUNDERSTORMS CONTINUE...

AT 700 PM EDT KENT COUNTY SHERRIFF REPORTED PEA SIZE HAIL..STRONG GUSTY
WINDS AND HEAVY RAIN IN THE PLAINFIELD AREA OF NORTHEAST GRAND RAPIDS.
KRAFT ORCHARDS REPORTED STRONG GUSTY WINDS WITH MANY BRANCHES DOWN IN
THUNDERSTORMS RUNNING THROUGH THAT NORTHWEST GRAND RAPIDS AREA ALONG
WITH EXTREMELY HEAVY RAIN. THESE STORMS CAN PRODUCE HEAVY RAIN,
STRONG GUSTY WINDS..DANGEROUS LIGHTNING AND SOME SMALL HAIL. SOME STREET
FLOODING IS OCCURING IN MANY AREAS OF SOUTHWEST LOWER MICHGAN AND WILL
CONTINUE TO DO SO AS THESE STORMS CONTINUE TONIGHT. ALSO LOW LYING AREAS
AND AND SMALL STREAMS MAY FLOOD DURING THE EVENING AND NIGHTTIME HOURS.
PERSONS SHOULD NOT DRIVE VEHICLES INTO AREAS WHERE THE WATER COVERS THE
RO	ADWAY. THE WATER DEPTH MAY BE TOO GREAT AND THE CAR MAY STALL.

THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT
AND MOST OF THURSDAY AS A LOW PRESSURE AREA MOVES TOWARD THE GREAT
LAKES OUT OF THE NORTHERN PLAINS STATES.

DBS
Special weather statement, Sep 10, 8:45 PM EDT, 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
845 PM EDT WED SEP 10 1986

...HEAVY RAINFALL AMOUNTS IN SOUTHWEST LOWER MICHIGAN TODAY...

AS OF 830 PM EDT..THE FOLLOWING 24 HOUR RAINFALL AMOUNTS HAVE BEEN
REPORTED IN SOUTHWEST LOWER MICHIGAN...

KENT COUNTY AIRPORT       3.22"
SPARTA                    7.83"
PLAINFIELD                5.16"
CANNONSBURG               5.90"
PEACH RIDGE               5.33"
ROCKFORD   ~               5.19"
MJK
Special weather statement, Sep 10, 9:34 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  MUSKEGON MI
925PM EDT WED SEP 10 1986

..VERY STRONG THUNDERSTORMS ACROSS WESTERN MICHIGAN...

THE SEVERE THUNDERSTORM WARNING FOR MUSKEGON AND NEWAGO COUNTIES EXPIRED
AT 915PM EDT BUT A FLASH FLOOD WARNING IS NOW IN EFFECT UNTIL 1100PM EDT
FOR THE NORTHERN HALF OF MUSKEGON AND SOUTHERN NEWAGO COUNTIES.

AT 905PM EDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN FROM 50
MILES NORTHWEST TO 40 MILES NORTHEAST OF MUSKEGON.
THESE STORMS CONTAIN VERY HEAVY RAIN AND WERE MOVING FROM WEST TO EAST
AT ABOUT 35 MILES AN HOUR. THIS VERY HEAVY RAIN ON TOP OF THE OVER 4
INCHES RECEIVED ALREADY TODAY MAY CAUSE FLASH FLOODING IN PARTS OF
MUSKEGON AND NEWAGO COUNTIES.

STAY TUNED TO YOUR LOCAL RADIO OR TELEVISION STATIONS OR NOAA WEATHER
RADIO FOR FURTHER STATEMENTS OR WARNINGS.
END WSO MKG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 10:26 PM EDTFlash Flood WarningGRRKent3 hr
Sep 10, 11:07 PM EDTFlash Flood WarningGRRGratiot3 hr
Sep 10, 11:47 PM EDTFlash Flood WarningGRRMontcalm4 hr
Sep 11, 1:11 AM EDTFlash Flood WarningGRRKent4 hr
Sep 11, 3:03 AM EDTFlash Flood WarningGRRMontcalm4 hr
Sep 11, 5:05 AM EDTFlash Flood WarningGRRKent, Montcalm4 hr

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.