Alert archive / Michigan / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 10, NWS Gaylord, MI

July 9, 1987Antrim County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 9, 1987, 1:35 PM EDT for Antrim County, Michigan. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1987, 1:35 PM EDT (17:35 UTC)
Expired
Jul 9, 1987, 2:30 PM EDT
In force
55 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Antrim 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, 5.6 hours before the alert went out and 176 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 KMKG 091735
SVRMKG
MIC009-091830-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
135 PM EDT THU JUL 9 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 230 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHWEST LOWER MICHIGAN...ANTRIM

AT 129 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES
NORTHEAST OF TRAVERSE CITY...IN NORTHWEST LOWER MICHIGAN...OVER THE
CITY OF BELLAIRE...MOVING TOWARD THE EAST AT 25 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

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, Jul 9, 10:32 AM EDT, 3 hours 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAULT STE MARIE MI
1045 AM EDT THU JUL 9 1987

...HEAVY THUNDERSTORMS RUMBLING OVER EASTERN UPPER MICHIGAN...

RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM JUST EAST OF
GRAND MARIAS SOUTH TO TROUT LAKE  AND ACROSS THE MACKINAW BRIDGE AREA
SOUTH TO CROSS VILLAGE AND CHARLEVOIX. SOME OF THESE THUNDERSTORMS
ARE QUITE INTENSE IN NATURE AS HEAVY RAIN..GUSTY WINDS..POSSIBLE HAIL
AND FREQUENT LIGHTNING ARE POSSIBLE.  THE LINE OF THUNDERSTORMS WAS
MOVING TO THE EAST NORTHEAST AT 15 TO 20 MPH. IF THREATENING WEATHER
APPROACHES..BE PREPARED TO SEEK SAFE SHELTER IMMEDIATELY.

SHNOWSKI

The office that day

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

IssuedProductOfficeCountiesLasted
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, 5:10 PM EDTSevere Thunderstorm WarningAPXKalkaska35 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.