Alert archive / Michigan / Tornado Warnings in 1986
Tornado Warning 20, NWS Detroit, MI
NWS Detroit, MI issued this tornado warning at Aug 2, 1986, 3:47 PM EDT for Saint Clair County, Michigan. It was in force for 28 min.
The area
The counties it named.
The facts
- Issued
- Aug 2, 1986, 3:47 PM EDT (19:47 UTC)
- Expired
- Aug 2, 1986, 4:15 PM EDT
- In force
- 28 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
County Saint Clair 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, 7.8 hours before the alert went out and 67 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
- 307 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDTW 021947 TORDTW MIC147-022015- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DETROIT MI 347 PM EDT SAT AUG 2 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 415 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST LOWER MICHIGAN...ST. CLAIR AT 345 PM EDT RADAR INDICATED A TORNADO 15 MILES SOUTHWEST OF PORT HURON MOVING TO THE EAST AT 30 MILES AN HOUR. IF THREATENING WEATHER APPROACHES GO TO A BASEMENT SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A REINFORCED BUILDING. STAY TUNED TO NOAA WEATHER RADIO..COMMERCIAL RADIO..OR TELEVISION FOR LATER STATEMENTS OR POSSIBLE WARNINGS. ...GREEN...
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, Aug 2, 1:40 PM EDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 135 PM EDT SAT AUG 2 1986 ...SEVERE THUNDERSTORM WATCH NUMBER 451 CONTINUES IN EFFECT UNTIL 700PM FOR MUCH OF SOUTHEAST LOWER MICHIGAN... A LINE OF VERY STRONG THUNDERSTORMS CONTINUES TO MOVE EAST ACROSS LOWER MICHIGAN THIS AFTERNOON. RADAR INDICATES THAT SOME OF THESE STORMS HAVE BECOME DANGEROUS AND WILL CONTINUE TO DO SO UNTIL THE LINE MOVES EAST OF THE STATE THIS EVENING. PERSONS IN OR NEAR THE WATCH AREA SHOULD BE ALERT FOR THREATENING CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY. STAY TUNED TO YOUR LOCAL RADIO OR TV STATION OR THE NEAREST NOAA WEATHER RADIO STATION FOR THE LATEST STATEMENTS AND WARNINGS., DGH
Special weather statement, Aug 2, 2:25 PM EDT, 1 hour 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLINT MI 230 PM EDT SAT AUG 2 1986 ...INTENSE THUNDERSTORMS MOVING THRU GENESEE AND SHIAWASEE COUNTIES ... REPORTS OF HEAVY THUNDERSTORMS..FUNNEL CLOUDS..WINDS IN EXCESS OF 50 MPH AND HAIL WERE RECEIVED IN SOUTHERN GENESSEE COUNTY DURING PAST HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF EAST CENTRAL AND SOUTHEAST LOWER MICHIGAN UNTIL 7PM EDT. THESE THUNDERSTORMS A PART OF A LINE OF HEAVY THUNDERSTORMS STRETCHING FROM THE SOUTHERN THUMB TO HILLSDALE. IF THREATENING WEATHER APPROACHES... MOVE TO A PLACE OF SAFETY. TOERPE
Special weather statement, Aug 2, 2:53 PM EDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLINT MI 255 PM EDT SAT AUG 2 1986 ...INTENSE THUNDERSTORMS MOVING THRU GENESEE AND LAPEER COUNTIES ... REPORTS OF HEAVY THUNDERSTORMS STRONG WINDS AND HAIL WERE RECEIVED IN SOUTHERN GENESSEE AND SOUTHERN LAPEER COUNTIES DURING THE PAST HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF EAST CENTRAL AND SOUTHEAST LOWER MICHIGAN UNTIL 7PM EDT. A SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 330PM EDT FOR SOUTHERN LAPEER COUNTY. THESE THUNDERSTORMS ARE PART OF A LINE OF HEAVY THUNDERSTORMS STRETCHING FROM THE SOUTHEASTERN THUMB TO JACKSON. IF THREATENING WEATHER APPROACHES... MOVE TO A PLACE OF SAFETY. TOERPE
Special weather statement, Aug 2, 3:16 PM EDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 315 PM EDT SAT AUG 2 1986 ...SEVERE THUNDERSTORM WATCH NUMBER 451 CONTINUES IN EFFECT UNTIL 700PM FOR MUCH OF SOUTHEAST LOWER MICHIGAN... A LINE OF VERY STRONG THUNDERSTORMS CONTINUES TO MOVE EAST ACROSS LOWER MICHIGAN. AT 3 PM THE LINE EXTENDED FROM WESTERN ST CLAIR COUNTY TO NORTHWEST MONROE COUTNY. OTHER STORMS ARE DEVELOPING WEST OF THIS LINE TOWARD JACKSON AND FROM SOUTHERN SAGINAW BAY INTO CENTRAL LAKE HURON. PERSONS IN OR NEAR THE WATCH AREA SHOULD BE ALERT FOR THREATENING CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY. STAY TUNED TO YOUR LOCAL RADIO OR TV STATION OR THE NEAREST NOAA WEATHER RADIO STATION FOR THE LATEST STATEMENTS AND WARNINGS. DGH
Special weather statement, Aug 2, 3:33 PM EDT, 14 minutes before
-ARBSPSDTW SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT MI 330 PM EDT SAT AUG 2 1986 AT 325 PM MICHIGAN STATE POLICE REPORTED A TORNADO TOUCHDOWN NEAR 28 MILES ROAD AND KITTLE ROAD IN MACOMB COUNTY OF SOUTHEAST LOWER MICHIGAN. DETROIT RADAR SHOWED A VERY HEAVY THUNDERSTORM IN THIS AREA THAT WAS MOVING TO THE EAST AT 30 MILES AN HOUR. OTHER REPORTS OF SMALL HAIL WERE ALSO RECEIVED FORM OAKLAND COUNTY AT THIS TIME. GR
Special weather statement, Aug 2, 3:34 PM EDT, 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 330 PM EDT SAT AUG 2 1986 ...SEVERE THUNDERSTORM WATCH NUMBER 451 HAS BEEN CANCELLED FOR A PORTION OF SOUTHEAST LOWER MICHIGAN...THE FOLLOWING COUNTIES CONTINUE TO BE IN THE SEVERE THUNDERSTORM WATCH AREA UNTIL 700PM.. HURON..TUSCOLA..SANILAC..LAPEER..ST CLAIR..OAKLAND..MACOMB..JACKSON.. WASHTENAW..WAYNE..HILLSDALE..LENAWEE..AND MONROE. PERSONS IN OR NEAR THE WATCH AREA SHOULD BE ALERT FOR THREATENING CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY. DGH
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 2:13 PM EDT | Tornado Warning | DTX | Genesee | 32 min |
| Aug 2, 2:26 PM EDT | Severe Thunderstorm Warning | DTX | Lenawee, Washtenaw | 44 min |
| Aug 2, 2:26 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 44 min |
| Aug 2, 2:35 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 55 min |
| Aug 2, 3:25 PM EDT | Tornado Warning | DTX | Macomb | 25 min |
| Aug 2, 3:57 PM EDT | Tornado Warning | DTX | Wayne | 23 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.