Alert archive / Michigan / Flash Flood Warnings in 2021
Flash Flood Warning 8, NWS Detroit, MI
NWS Detroit, MI issued this flash flood warning at Aug 27, 2021, 1:12 PM EDT for Oakland County, Wayne County, Michigan. It was in force for 3 hr. 7 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 27, 2021, 1:12 PM EDT (17:12 UTC)
- Expired
- Aug 27, 2021, 4:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Oakland County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 38 km from the middle of the area, began a volume at 17:15 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 27, 1:16 PM EDT | FLOOD | 1 Ese Southfield, MI | FLOODING AT M10 AND EVERGREEN IMPACTING ALL LANES |
| Aug 27, 1:24 PM EDT | FLOOD | 4 W Detroit, MI | I96 WB IMPASSIBLE NEAR SCHAEFER |
| Aug 27, 1:28 PM EDT | FLOOD | 3 N Dearborn, MI | M39 FREEWAY CLOSED FROM FORD TO I96 |
| Aug 27, 1:52 PM EDT | FLOOD | 3 N Dearborn, MI | MULTIPLE CARS FLOODED OUT ON BOTH LANES AT M39 AT JOY ROAD INTERSECTION |
| Aug 27, 2:07 PM EDT | FLOOD | 6 E Southfield, MI | MULTIPLE MAIN AND SIDE ROADS FLOODING ACROSS ROYAL OAK. SPECIFIC LOCATIONS INCLUDE SHERMAN AND LAFAYETTE, AND MAPLE AND LOUIS. REPORTS OF CARS STALLED OUT ON BELLAIRE BETWEEN CAMPBELL AND EDGEWORTH. |
| Aug 27, 2:30 PM EDT | FLOOD | 4 Nne Livonia, MI | GRAND RIVER WESTBOUND AT INTERSECTION OF MIDDLEBELT FLOODED OUT |
| Aug 27, 3:00 PM EDT | HEAVY RAIN 3.73 | Garden City, MI | 4 HOUR RAINFALL TOTAL. SPOTTER OBSERVED MINOR STREET FLOODING |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 5.2 hours before the alert went out and 38 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
- 319 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
156
WGUS53 KDTX 271712
FFWDTX
MIC125-163-272015-
/O.NEW.KDTX.FF.W.0008.210827T1712Z-210827T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Detroit/Pontiac MI
112 PM EDT Fri Aug 27 2021
The National Weather Service in Detroit/Pontiac has issued a
* Flash Flood Warning for...
Southeastern Oakland County in southeastern Michigan...
Northwestern Wayne County in southeastern Michigan...
* Until 415 PM EDT.
* At 112 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1
hour. Additional rainfall amounts up to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Livonia, Southfield, Taylor, Novi, Romulus, Canton, Detroit,
Dearborn, Royal Oak, Greenfield Village, Detroit Zoo, Westland,
Farmington Hills, Dearborn Heights, Lincoln Park, Madison Heights,
Oak Park, Allen Park, Garden City and Inkster.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4251 8345 4253 8309 4232 8308 4226 8315
4224 8343
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2.5 INCHES IN 1 HOUR
$$
Behnke2 follow-up statements
475
WGUS73 KDTX 271752
FFSDTX
Flash Flood Statement
National Weather Service Detroit/Pontiac MI
152 PM EDT Fri Aug 27 2021
MIC125-163-272015-
/O.CON.KDTX.FF.W.0008.000000T0000Z-210827T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Oakland MI-Wayne MI-
152 PM EDT Fri Aug 27 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT THIS
AFTERNOON FOR SOUTHEASTERN OAKLAND AND NORTHWESTERN WAYNE COUNTIES...
At 152 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3 inches of rain have
fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1 hour.
Additional rainfall amounts up to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Livonia, Southfield, Taylor, Novi, Romulus, Canton, Detroit,
Dearborn, Royal Oak, Greenfield Village, Detroit Zoo, Westland,
Farmington Hills, Dearborn Heights, Lincoln Park, Madison Heights,
Oak Park, Allen Park, Garden City and Inkster.
MDOT has reported freeway closures on I 96 and M 39.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4251 8345 4253 8309 4232 8308 4226 8315
4224 8343
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2.5 INCHES IN 1 HOUR
$$
Behnke133
WGUS73 KDTX 272011
FFSDTX
Flash Flood Statement
National Weather Service Detroit/Pontiac MI
411 PM EDT Fri Aug 27 2021
MIC125-163-272021-
/O.EXP.KDTX.FF.W.0008.000000T0000Z-210827T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Oakland MI-Wayne MI-
411 PM EDT Fri Aug 27 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 415 PM EDT THIS AFTERNOON FOR
SOUTHEASTERN OAKLAND AND NORTHWESTERN WAYNE COUNTIES...
The heavy rain has ended. Please continue to heed remaining road
closures.
LAT...LON 4251 8345 4253 8309 4232 8308 4226 8315
4224 8343
$$The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 9:34 PM EDT | Small Craft Advisory | DTX | 30 hr | |
| Aug 27, 4:04 AM EDT | Beach Hazards Statement | DTX | Huron | 18 hr |
| Aug 27, 6:43 AM EDT | Special Weather Statement | DTX | Bay, Midland, Saginaw | 62 min |
| Aug 27, 8:32 AM EDT | Areal Flood Advisory | DTX | Saginaw | 3 hr |
| Aug 27, 10:03 AM EDT | Areal Flood Advisory | DTX | Genesee | 3 hr |
| Aug 27, 12:08 PM EDT | Special Weather Statement | DTX | Wayne | 67 min |
| Aug 27, 12:22 PM EDT | Special Weather Statement | DTX | Macomb | 68 min |
| Aug 27, 12:47 PM EDT | Areal Flood Advisory | DTX | Oakland, Wayne | 3 hr |
| Aug 27, 12:57 PM EDT | Special Weather Statement | DTX | Macomb | 63 min |
| Aug 27, 1:02 PM EDT | Special Marine Warning | DTX | 58 min | |
| Aug 27, 1:56 PM EDT | Flash Flood Warning | DTX | Wayne | 2 hr |
| Aug 27, 4:26 PM EDT | Areal Flood Warning | DTX | Wayne | 6 hr |
Nearby
Flash Flood Warnings in Michigan, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.