Alert archive / Michigan / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 13, NWS Gaylord, MI

July 9, 1987Kalkaska County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 9, 1987, 5:10 PM EDT for Kalkaska County, Michigan. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1987, 5:10 PM EDT (21:10 UTC)
Expired
Jul 9, 1987, 5:45 PM EDT
In force
35 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Kalkaska 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

Sault Ste Marie, MI (KSSM), launched 12:00Z, 9.2 hours before the alert went out and 208 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, Sault Ste Marie, MI at 12:00Z on 1987-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Sault Ste Marie, MI at 12:00Z on 1987-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1280 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRR 092110
SVRMKG
MIC079-092145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
ISSUED BY GRAND RAPIDS MI
510 PM EDT THU JUL 9 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 545 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHWEST LOWER MICHIGAN...NORTHEAST KALKASKA

AT 505 PM EDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN
NORTHEAST KALKASKA COUNTY. THE THUNDERSTORM WAS MOVING NORTHEAST AT
30 MPH.

SEVERE THUNDERSTORMS MAY SPAWN FUNNEL CLOUDS OR TORNADOES. WHEN A
FUNNEL CLOUD REACHES THE GROUND IT BECOMES A TORNADO. IF A FUNNEL
CLOUD IS SIGHTED...TAKE COVER IMMEDIATELY AS YOU WOULD WITH A
TORNADO. YOUR LIFE MAY DEPEND ON IT.

BROWN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 1:35 PM EDTSevere Thunderstorm WarningAPXAntrim55 min
Jul 9, 2:17 PM EDTSevere Thunderstorm WarningAPXBenzie, Grand Traverse, Leelanau, Manistee58 min
Jul 9, 4:00 PM EDTSevere Thunderstorm WarningAPXLuce, Mackinac60 min
Jul 9, 7:02 PM EDTSevere Thunderstorm WarningAPXNewaygo43 min
Jul 9, 7:28 PM EDTSevere Thunderstorm WarningAPXLake42 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.