Alert archive / Michigan / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 48, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Sep 26, 1986, 6:45 PM EDT for Lenawee County, Monroe County, Michigan. It was in force for 45 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 26, 1986, 6:45 PM EDT (22:45 UTC)
- Expired
- Sep 26, 1986, 7:30 PM EDT
- In force
- 45 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
Counties Lenawee County, MI, Monroe County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 26, 7:00 PM EDT | Thunderstorm Wind 0 | Lenawee, MI | |
| Sep 26, 7:05 PM EDT | Thunderstorm Wind 0 | Monroe, MI | |
| Sep 26, 7:20 PM EDT | Thunderstorm Wind 0 | Monroe, MI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Detroit, MI (KFNT), launched 12:00Z, 10.8 hours before the alert went out and 95 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
- 2111 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.4
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Sep 26, 4:16 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER AND FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 415 PM EDT FRI SEP 26 1986 ...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF SOUTH LOWER MICHIGAN UNTIL 900 PM EDT THIS EVENING... ...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE SOUTH TWO THIRDS OF LOWER MICHIGAN... SEVERE THUNDERSTORM WATCH NUMBER 519 IS NOW IN EFFECT FOR MUCH OF SOUTH LOWER MICHIGAN... MAINLY SOUTH OF A GRAND RAPIDS.. SAGINAW LINE. THIS WATCH IS IN EFFECT UNTIL 900 PM EDT THIS EVENING. AT 410 PM EDT WEATHER RADAR SHOWED SCATTERED THUNDERSTORMS ACROSS NORTH ILLINOIS... NORTH INDIANA... SOUTH LOWER MICHIGAN AND NORTH OHIO. STORMS WERE MOVING EAST AT ABOUT 35 MPH. A FLOOD WARNING IS IN EFFECT FOR THE FLINT RIVER AT FLINT MICHIGAN... WHERE THUNDERSTORMS DUMPED MORE RAIN EARLIER TODAY. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE SOUTH TWO THIRDS OF LOWER MICHIGAN THROUGH SATURDAY NIGHT. EACH BATCH OF THUNDERSTORMS WHICH CROSSES THE SOUTH TWO THIRDS OF THE LOWER PENINSULA WILL BRING THE THREAT OF HEAVY RAINFALL... AND THE ATTENDANT RISK OF FLASH FLOODING. A FLASH FLOOD WATCH MEANS RAPID FLOODING IS POSSIBLE WITHIN THE WATCH AREA. PERSONS IN THIS AREA SHOULD REMAIN ALERT AND BE READY TO TAKE QUICK ACTION IF FLOODING IS OBSERVED OR A WARNING ISSUED.
Special weather statement, Sep 26, 4:17 PM EDT, 2 hours 28 minutes before
SPECIAL WEATHER AND FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ANN ARBOR MI 415 PM EDT FRI SEP 26 1986 ...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF SOUTH LOWER MICHIGAN UNTIL 900 PM EDT THIS EVENING... ...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE SOUTH TWO THIRDS OF LOWER MICHIGAN... SEVERE THUNDERSTORM WATCH NUMBER 519 IS NOW IN EFFECT FOR MUCH OF SOUTH LOWER MICHIGAN... MAINLY SOUTH OF A GRAND RAPIDS.. SAGINAW LINE. THIS WATCH IS IN EFFECT UNTIL 900 PM EDT THIS EVENING. AT 410 PM EDT WEATHER RADAR SHOWED SCATTERED THUNDERSTORMS ACROSS NORTH ILLINOIS... NORTH INDIANA... SOUTH LOWER MICHIGAN AND NORTH OHIO. STORMS WERE MOVING EAST AT ABOUT 35 MPH. A FLOOD WARNING IS IN EFFECT FOR THE FLINT RIVER AT FLINT MICHIGAN... WHERE THUNDERSTORMS DUMPED MORE RAIN EARLIER TODAY. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE SOUTH TWO THIRDS OF LOWER MICHIGAN THROUGH SATURDAY NIGHT. EACH BATCH OF THUNDERSTORMS WHICH CROSSES THE SOUTH TWO THIRDS OF THE LOWER PENINSULA WILL BRING THE THREAT OF HEAVY RAINFALL... AND THE ATTENDANT RISK OF FLASH FLOODING. A FLASH FLOOD WATCH MEANS RAPID FLOODING IS POSSIBLE WITHIN THE WATCH AREA. PERSONS IN THIS AREA SHOULD REMAIN ALERT AND BE READY TO TAKE QUICK ACTION IF FLOODING IS OBSERVED OR A WARNING ISSUED. KAUFMAN
Special weather statement, Sep 26, 6:17 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT MI
600 PM EDT FRI SEP 26 1986
... THUNDERSTORMS CAUSING URBAN FLOODING...
AT 6 PM EDT RADAR INDICATED A HEAVY THUNDERSTORM MOVING INTO THE
SOUTHWEST PORTION OF SHIAWASSEE COUNTY. HEAVY RAIN DANGEROUS LIGHTENING
AND GUSTY WINDS ARE LIKELY WITH THIS STORM.
FLOODING OF SMALL STREAMS ..LOW LYING AREAS.. AND STREETS AND UNDERPASSES
ARE LIKELY AS THIS STORM PASSES OVER THE AREA. THIS STORM IS MOVING EAST
AT 35 MPH AND WILL ENTER GENESEE COUNTY WITHIN THE HOUR. THIS STORM WILL
MOVE OVER THE SAME AREA THAT HAD THE HEAVY RAIN FALL EARLIER TODAY.
PERSONS IN FLOOD PRONE AREAS SHOULD PREPARE TO TAKE APPROPRIATE ACTION
AND MONITOR THE RAINFALL CLOSELY.
A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT SUNDAY MORNING.
AND A SEVER THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM EDT THIS EVENING.
STAY TUNED TO NOAA WEATHER RADIO OR LOCAL TELEVISION OR COMMERCIAL
RADIO FOR LATER UPDATES AND POSSIBLE WARNINGS.
BURNSThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 11:02 PM EDT | Severe Thunderstorm Warning | DTX | Clare | 43 min |
| Sep 26, 9:07 AM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 23 min |
| Sep 26, 9:30 AM EDT | Severe Thunderstorm Warning | DTX | Monroe | 45 min |
| Sep 26, 4:38 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Oakland | 37 min |
| Sep 26, 6:45 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Washtenaw | 45 min |
| Sep 26, 7:13 PM EDT | Tornado Warning | DTX | Livingston, Oakland | 47 min |
| Sep 26, 7:23 PM EDT | Tornado Warning | DTX | Monroe, Wayne | 52 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.