Alert archive / Michigan / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 12, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jul 18, 1986, 4:08 PM EDT for Oscoda County, Michigan. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1986, 4:08 PM EDT (20:08 UTC)
- Expired
- Jul 18, 1986, 5:05 PM EDT
- In force
- 57 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
County Oscoda 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, 8.1 hours before the alert went out and 199 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
- 412 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KAPN 182008 SVRAPN MIC135-182105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ALPENA MI 408 PM EDT FRI JUL 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 505 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST LOWER MICHIGAN...OSCODA AT 4 PM EDT A SEVERE THUNDERSTORM WAS LOCATED IN NORTHWEST OSCOADA 15 MILES NORTHWEST OF MIO. THIS STORM WAS MOVING TO THE SOUTHEAST AT 40 MILES AN HOUR. IF YOU ARE IN THE PATH OF THIS STORM..MOVE TO A PLACE OF SAFETY. SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WIND..LARGE HAIL.. VERY HEAVY RAIN..AND FREQUENT LIGHTNING. THEY SOMETIMES SPAWN A TORNADO WITH LITTLE ROR NO ADVANCE WARNING..SO BE ON THE LOOKOUT. STAY TUNED TO YOUR LOCAL RADIO OR TELEVISION STATION..OR TO NOAA WEATHER RADIO FOR THE LATEST INFORMATION. RUNYON
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 18, 3:50 PM EDT, 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUGHTON LAKE MI 350 PM EDT FRI JUL 18 1986 ...POTENTIALLY SEVERE THUNDERSTORMS BUILDING OVER NORTH LOWER MICHIGAN... AT 350 PM EDT...THUNDERSTORMIS WITH VERY HEAVY RAIN..STRONG GUSTY WINDS...AND DANGEROUS LIGHTNING ARE BUILDING OVER NORTH LOWER MICHIGAN IN THE COUNTIES OF OTSEGO AND CRAWFORD..BETWEEN 30 AND 70 MILES NORTH AND NORTHEAST OF HOUGHTON LAKE. HUDGENS
The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 9:50 PM EDT | Tornado Warning | APX | Luce | 25 min |
| Jul 18, 1:00 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Luce, Mackinac | 60 min |
| Jul 18, 4:43 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Alpena | 32 min |
| Jul 18, 6:11 PM EDT | Tornado Warning | APX | Oscoda | 34 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1986Every severe thunderstorm warning in 1986
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.