Alert archive / Michigan / Tornado Warnings in 1986
Tornado Warning 15, NWS Detroit, MI
NWS Detroit, MI issued this tornado warning at Jul 18, 1986, 9:38 PM EDT for Genesee County, Shiawassee County, Michigan. It was in force for 52 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1986, 9:38 PM EDT (01:38 UTC)
- Expired
- Jul 18, 1986, 10:30 PM EDT
- In force
- 52 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
Counties Genesee County, MI, Shiawassee 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 00:00Z, 1.6 hours before the alert went out and 50 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
- 1593 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1337 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFNT 190138 TORFNT MIC155-049-190230- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE FLINT MI 938 PM EDT FRI JUL 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1030 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL LOWER MICHIGAN...EASTERN SHIAWASSEE AND GENESEE SHIAWASEE COUNTY SHERIFF DEPUTY REPORTED TWO FUNNEL CLOUDS POSSIBLY TOUCHING THE GROUND. 20 NORTHWEST OF FLINT NEAR NEWLOTHROP AND LENNON. ANOTHER WAS REPORTED NEAR STANLEY AND DORT. 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 ST AY IN A CAR OR MOBILE HOME..FIND A REINFORCED SHELTER OR LIE FLAT IN A DITCH OR RAVINE. BURNS
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
Special weather statement, Jul 18, 6:14 PM EDT, 3 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLINT MI 605 PM EDT FRI JUL 18 1986 ....SEVERE THUNDERSTORM WATCH IN EFFECT TILL 11PM EDT.... ...FOR MIDLAND BAY ARENAC SANILAC TUSCOLA AND HURON COUNTIES... AT 600 PM RADAR SHOWED AN AREA OF RAIN SHOWERS AND THUNDERSTORMS FROM JUST SOUTH OF TAWAS TO ALPENA EXTENDING OUT OVER LAKE HURON. THESE THUNDERSTORMS ARE MOVING TOWARDS THE SOUTHEAST AT 25 MPH AND WILL MOVE OVER THE NORTHEAST PORTION OF :SAGINAW BAY AND NORTHERN HURON COUNTY WITHIN THE HOUR. THESE THUNDERSTORMS MAY CONTAIN HEAVY RAIN GUSTY WINDS AND DANGEROUS LIGHTENING. BURNS
Special weather statement, Jul 18, 8:26 PM EDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLINT MI 825 PM EDT FRI JUL 18 1986 SEVERE THUNDERSTORM WATCH IN EFFECT TILL 11PM EDT FOR HURON AND ARENAC COUNTIES. SEVERE THUNDERSTORM WATCH IN EFFECT TILL 1PM FOR LAPEER MIDLAND SAGINAW SANILAC SHIAWASSEE BAY GENESEE AND TUSCOLA COUNTIES. AT 820PM RADAR SHOWED AN AREA OF RAIN SHOWERS AND THUNDERSTORMS OVER SAGINAW BAY AND THE THUMB AREA OF LOWER MICHIGAN. THESE THUNDERSTORMS ARE MOVING TOWARDS THE SOUTHEAST AT 25 MPH TO 35 MPH. BURNS
Special weather statement, Jul 18, 9:18 PM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 919 PM EDT FRI JUL 18 1986 ...SEVERE THUNDERSTORM WATCHS CONTINUE FOR MOST PORTIONS OF NORTHERN LOWER MICHIGAN..AND FOR ALL OF SOUTHERN LOWER MICHIHIGAN... THE SEVERE THUNDERSTORM WATCH NUMBER 389 IS IN EFFECT UNTIL 11 PM EDT FOR MOST PORTIONS OF NORTHERN LOWER MICHIGAN. THE SEVERE THUNDERSTORM WATCH NUMBER 392 IS IN EFFECT UNTIL 1 AM EDT SATURDAY MORNING FOR ALL OF SOUTHERN LOWER MICHIGAN. THUNDERSTORMS CONTINUE THIS EVENING OVER LOWER MICHIGAN..AT 830 PM EDT RADAR SHOWED THE STRONGER THUNDERSTORMS FROM NORTHWEST OF HOUGHTON LAKE TO NORTHEAST OF FLINT. THEY WERE MOVING TO THE SOUTHEAST AT ABOUT 35 MILES AN HOUR. A FEW FUNNEL CLOUD REPORTS HAVE ALSO BEEN RECEIVED THIS EVENING IN EAST CENTRAL LOWER MICHIGAN. DANGEROUS LIGHTNING..HIGH GUSTY DAMAGING WINDS..LARGE HAIL MAY ACCOMPANY THESE STORMS. STAY TUNE TO NOAA WEATHER RADIO..OR ANY COMMERCIAL RADIO OR TV FOR FURTHER UPDATES CONCERNING THESE STORMS. RUNYAN
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:15 PM EDT | Tornado Warning | DTX | Saginaw | 45 min |
| Jul 18, 9:08 PM EDT | Tornado Warning | DTX | Genesee | 52 min |
| Jul 18, 10:09 PM EDT | Tornado Warning | DTX | Genesee, Shiawassee | 51 min |
| Jul 19, 5:45 PM EDT | Severe Thunderstorm Warning | DTX | Roscommon | 60 min |
Nearby
Tornado Warnings in Michigan, 1986Every tornado warning in 1986Tornadoes 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.