Alert archive / Michigan / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 13, NWS Grand Rapids, MI

July 3, 1987Jackson County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 3, 1987, 1:36 PM EDT for Jackson County, Michigan. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jul 3, 1987, 1:36 PM EDT (17:36 UTC)
Expired
Jul 3, 1987, 2:15 PM EDT
In force
39 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

County 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, 5.6 hours before the alert went out and 97 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 1987-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 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 1987-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
157 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLAN 031736
SVRLAN
MIC025-075-031815-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LANSING MI
136 PM EDT FRI JUL 3 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 215 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTH CENTRAL LOWER MICHIGAN...CALHOUN AND JACKSON

AT 130 PM EDT RADAR INDICATED SEVERE THUNDERSTORMS JUST WEST OF
ALBION...OR 40 MILES SOUTHWEST OF LANSING...AND 10 MILES SOUTH OF
MARSHALL...OR 45 MILES SOUTHWEST OF LANSING...IN CALHOUN COUNTY.
THE STORMS WERE MOVING EAST 35 MPH.  PEOPLE IN ALBION...AND THE
CITY OF JACKSON ARE NEAR THE PATH OF THESE STORMS AND CAN EXPECT
STRONG WINDS...VERY HEAVY RAIN AND HAIL.

IF YOU ARE IN AN AREA THREATENED BY THIS STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND FREQUENT DANGEROUS LIGHTNING.

REMEMBER...SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.

 THE SEVERE THUNDERSTORM WARNING FOR JACKSON COUNTY IS NOW EXTENDED
 UNTIL 215 PM EDT.

 BUNTING/COKELY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 12:54 PM EDTSevere Thunderstorm WarningGRRIngham, Jackson36 min
Jul 3, 1:36 PM EDTSevere Thunderstorm WarningGRRCalhoun25 min
Jul 3, 2:22 PM EDTSevere Thunderstorm WarningGRRJackson21 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1987Every severe thunderstorm warning in 1987

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.