Alert archive / Michigan / Tornado Warnings in 1987

Tornado Warning 5, NWS Gaylord, MI

July 20, 1987Osceola County, Michigan

NWS Gaylord, MI issued this tornado warning at Jul 20, 1987, 5:16 PM EDT for Osceola County, Michigan. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1987, 5:16 PM EDT (21:16 UTC)
Expired
Jul 20, 1987, 5:45 PM EDT
In force
29 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County 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 12:00Z, 9.3 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, Detroit, MI at 12:00Z on 1987-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3198 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 1987-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
3198 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
697 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
101 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 KMKG 202116
TORMKG
MIC133-202145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
516 PM EDT MON JUL 20 1987

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

WEST CENTRAL LOWER MICHIGAN...NORTHERN OSCEOLA

RADAR INDICATES A TORNADO MOVING INTO NORTHERN OSCEOLA COUNTY.
TAKE COVER IMMEDIATELY

IF YOU ARE IN THE PATH OF THIS TORNADO..GO TO A BASEMENT SHELTER IF
AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR. DO NOT STAY IN A CAR OR MOBILE HOME..FIND A REINFORCED
SHELTER OR LIE FLAT IN A DITCH OR RAVINE.

SPLITT

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 20, 11:31 AM EDT, 5 hours 45 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ALPENA MI
1100 AM EDT MON JUL 20 1987

REPORT OF SEVERE THUNDERSTORM..SOUTHWEST ALPENA COUNTY..SUNDAY JULY 19

1905 EDT 2305Z  SEVERE THUNDERSTORM HEAVILY DAMAGED BEAVER LAKE PARK..
                20 MILES SOUTHWEST OF ALPENA. HEAVY DOWNPOUR WITH
                SOUND OF FREIGHT TRAIN. STEADY INTENSE EAST WIND
                RESULTED IN AT LEAST 60 TREES UPROOTED OR BROKEN OFF
                NEAR BASE. MOST TREES 2 FEET OR MORE IN DIAMETER AND
                NEARLY ALL FELL TOWARD THE WEST. TWO PEOPLE IN CAMPER
                INJURED AND HOSPITALIZED. EXTENT OF INJURIES UNKNOWN
                AT THIS TIME. ONE SHED DESTROYED.

                TIM&E REPORTS INCONSISTENT. BEST ESTIMATE OF TIME OF
                DAMAGE BETWEEN 1905 AND 1935 EDT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 4:35 PM EDTSevere Thunderstorm WarningAPXGrand Traverse, Kalkaska, Missaukee, Wexford55 min
Jul 20, 4:51 PM EDTSevere Thunderstorm WarningAPXLake69 min
Jul 20, 4:57 PM EDTTornado WarningAPXKalkaska, Missaukee, Wexford33 min
Jul 20, 4:57 PM EDTTornado WarningAPXGrand Traverse28 min
Jul 20, 5:27 PM EDTSevere Thunderstorm WarningAPXOscoda53 min
Jul 20, 5:42 PM EDTSevere Thunderstorm WarningAPXAlcona, Oscoda63 min
Jul 20, 5:59 PM EDTSevere Thunderstorm WarningAPXAlcona, Iosco46 min
Jul 20, 6:26 PM EDTTornado WarningAPXAlcona34 min
Jul 20, 6:56 PM EDTSevere Thunderstorm WarningAPXAlcona, Alpena, Iosco64 min

Nearby

Tornado Warnings in Michigan, 1987Every tornado warning in 1987Tornadoes 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.