Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 37, NWS Grand Rapids, MI

September 28, 1986Allegan County, Van Buren County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 28, 1986, 10:03 PM EDT for Allegan County, Van Buren County, Michigan. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Sep 28, 1986, 10:03 PM EDT (02:03 UTC)
Expired
Sep 28, 1986, 11:00 PM EDT
In force
57 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

Counties Allegan County, MI, Van Buren 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, 2.1 hours before the alert went out and 222 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 1986-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1626 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 1986-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
1626 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
984 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
118 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.9

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 28, 9:47 PM EDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
947 PM EDT SUN SEP 28 1986

...INTENSE THUNDERSTORMS MOVING INTO SOUTHWEST LOWER MICHIGAN...

AT 940 PM WEATHER RADAR INDICATED INTENSE THUNDERSTORMS MOVING INTO
SOUTHWEST LOWER MICHIGAN FROM OCEANA COUNTY THROUGH VAN-BUREN COUNTY
THEN ACROSS THE LAKE TO NORTHEAST ILLINOIS. THESE THUNDERSTORMS WERE
MOVING EAST NORTHEAST AT ABOUT 35 MPH. THESE THUNDERSTORMS MAY PRODUCE
VERY HEAVY RAIN...GUSTY WIND TO AROUND 50 MPH AND DANGEROUS LIGTNING.

PERSONS IN THE PATH OF THESE STORMS SHOULD BE ON THE ALERT AND WATCH
FOR HEAVY RAIN...GUSTY WINDS AND DANGEROUS LIGHNTING AS THESE
THUNDERSTOMS PASS THROUGH THE AREA.
STAY TUNED TO NOAA WEAxTHER RADIO...LOCAL RADIO OR TELEVISION FOR
FURTHER INFORMATION AND POSSIBLE WARNINGS.
BKR

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 10:47 PM EDTSevere Thunderstorm WarningGRRCalhoun, Eaton58 min
Sep 29, 12:00 AM EDTSevere Thunderstorm WarningGRRCalhoun, Jackson60 min
Sep 29, 1:07 AM EDTFlash Flood WarningGRRBranch3 hr
Sep 29, 5:29 PM EDTSevere Thunderstorm WarningGRRKalamazoo, Van Buren46 min
Sep 29, 6:06 PM EDTSevere Thunderstorm WarningGRRCalhoun, Eaton54 min
Sep 29, 6:42 PM EDTSevere Thunderstorm WarningGRRClinton, Ingham48 min
Sep 29, 7:01 PM EDTSevere Thunderstorm WarningGRRCalhoun, Eaton29 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.