Alert archive / Michigan / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 18, NWS Indianapolis, IN

April 25, 1986Berrien County, Cass County, Michigan

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 25, 1986, 10:08 PM EST for Berrien County, Cass County, Michigan. It was in force for 52 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 25, 1986, 10:08 PM EST (03:08 UTC)
Expired
Apr 25, 1986, 11:00 PM EST
In force
52 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

Counties Berrien County, MI, Cass County, MI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 25, 10:15 PM ESTHail 0.75Cass, MI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Detroit, MI (KFNT), launched 00:00Z, 3.1 hours before the alert went out and 245 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 1986-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 493 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 1986-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
493 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
2264 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
131 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 KSBN 260309
SVRSBN
MIC021-027-260400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SOUTH BEND IN
1008 PM EST FRI APR 25 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1100 PM EST FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTHWEST MICHIGAN...BERRIEN AND CASS

AT 10 05 PM EST...RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES
NORTH OF SOUTH BEND INDIANA..NEAR NILES MICHIGAN MOVING NORTHEAST
AT 5 MPH.

AT 955 PM EST...1/2 INCH DIAMETER HAIL WAS REPORTED AT NILES
MICHIGAN.

IF YOU ARE IN THE PATH OF THIS SEVERE THUNDERSTORM GET INTO A REIN-
FORCED SHELTER AND PREPARE FOR STRONG DAMAGING WIND...LARGE HAIL...
VERY HEAVY RAIN AND LIGHTNING.

THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS AND
UNDERPASSES.

REPORT SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY AND ASK
THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

MOWERY


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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.