Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 22, NWS Gaylord, MI

September 29, 1986Mecosta County, Osceola County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 29, 1986, 2:23 AM EDT for Mecosta County, Osceola County, Michigan. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Sep 29, 1986, 2:23 AM EDT (06:23 UTC)
Expired
Sep 29, 1986, 2:55 AM EDT
In force
32 min
Issued by
NWS Gaylord, MI
Area
Whole counties

Counties Mecosta County, MI, Osceola 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, 6.4 hours before the alert went out and 196 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

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMKG 290623
SVRMKG
MIC133-107-290730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
223 AM EDT MON SEP 29 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 330 AM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL LOWER MICHIGAN...SOUTHERN OSCEOLA AND NORTHERN MECOSTA

AT 218AM EDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES
NORTHEAST OF BIG RAPIDS...ABOUT 60 MILES NORTHEAST OF MUSKEGON...
MOVING EAST NORTHEAST AT 35 MPH.

IF YOU ARE IN THE PATH OF THIS STORM..GET TO A REINFORCED BUILDING.
SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WIND..LARGE HAIL..VERY
HEAVY RAIN..AND FREQUENT LIGHTNING. THEY OCCASIONALLY DO SPAWN A
TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT.

GALLOWAY

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 29, 1:26 AM EDTSevere Thunderstorm WarningAPXBenzie, Manistee64 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.