Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 42, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 16, 1987, 11:13 PM EDT for Montmorency County, Michigan. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- Aug 16, 1987, 11:13 PM EDT (03:13 UTC)
- Expired
- Aug 17, 1987, 12:15 AM EDT
- In force
- 62 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
County Montmorency 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 00:00Z, 3.2 hours before the alert went out and 161 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.
- Mixed-layer CAPE
- 317 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KAPN 170315 SVRAPN MIC119-170415- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ALPENA MI 1113 PM EDT SUN AUG 16 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST LOWER MICHIGAN...MONTMORENCY AT 1105 PM EDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR ENTERING WESTERN MONTMORENCY COUNTY OF NORTHEAST LOWER MICHIGAN AND MOVING EAST AT 30 MILES PER HOUR. IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND LIGHTNING. LEWIS
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, Aug 16, 6:20 PM EDT, 4 hours 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALPENA MI 620 PM EDT SUN AUG 16 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHERN PORTIONS OF NORTHEAST LOWER MICHIGAN... A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR MUCH OF LOWER MICHIGAN AND INCLUDES IOSCO..ALCONA AND OSCODA COUNTIES OF NORTHEAST LOWER MICHIGAN. THE WATCH IS IN EFFECT UNTIL 10 PM EDT THIS SUNDAY EVENING. AT 615 PM NO SHOWERS OR THUNDERSTORMS WERE INDICATED OVER NORTHEAST LOWER MICHIGAN. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WERE OVER ADJOINING LAKE HURON WATERS MOVING EAST TO NORTHEAST AT 30 MPH. WDL
Special weather statement, Aug 16, 9:44 PM EDT, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALPENA MI 943 PM EDT SUN AUG 16 1987 ...SEVERE THUNDERSTORM WATCH NO LONGER IN EFFECT FOR SOUTHERN PORTIONS OF NORTHEAST LOWER MICHIGAN... A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR PORTIONS OF SOUTHEAST LOWER MICHIGAN UNTIL 10 PM EDT THIS SUNDAY EVENING. AT 940 PM NO THUNDERSTORMS WERE INDICATED OVER NORTHEAST LOWER MICHIGAN. HOWEVER..SCATTERED SHOWERS WERE APPROACHING PRESQUE ISLE.. MOTMORENCY AND OSCODA COUNTIES FROM THE WEST MOVING EAST AT ABOUT 30 MILES PER HOUR. THESE SHOWERS WILL MOVE TO LAKE HURON BY 1130 PM. ANOTHER AREA OF SHOWERS AND STRONG THUNDERSTORMS MOVING EAST FROM LAKE MICHIGAN MAY MOVE ACROSS NORTHEAST LOW.ER MICHIGAN COUNTIES AFTER 1 AM EDT TONIGHT. WDL
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.