Alert archive / Michigan / Flash Flood Warnings in 2021
Flash Flood Warning 2, NWS Detroit, MI
NWS Detroit, MI issued this flash flood warning at Jun 30, 2021, 5:34 PM EDT for Wayne County, Michigan. It was in force for 116 min. 1 report 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
- Jun 30, 2021, 5:34 PM EDT (21:34 UTC)
- Expired
- Jun 30, 2021, 7:30 PM EDT
- In force
- 116 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Flood severity
- None
County Wayne County, MI
The radar
The Detroit radar (KDTX), 53 km from the middle of the area, began a volume at 21:34 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 |
|---|---|---|---|
| Jun 30, 5:34 PM EDT | FLOOD | 5 Ne Downtown Detroit, MI | MEDIA REPORTS OF FLOODING ON EAST AND WESTBOUND I-94 NEAR CONNER AS WELL AS ALONG I-94 OVERPASSES ON DETROITS EAST SIDE. |
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, 9.6 hours before the alert went out and 52 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
- 599 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 649 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
876
WGUS53 KDTX 302134
FFWDTX
MIC163-010030-
/O.NEW.KDTX.FF.W.0002.210630T2134Z-210701T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Detroit/Pontiac MI
534 PM EDT Wed Jun 30 2021
The National Weather Service in Detroit/Pontiac has issued a
* Flash Flood Warning for...
Northeastern Wayne County in southeastern Michigan...
* Until 830 PM EDT.
* At 534 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. The expected rainfall rate is up to 2 inches in 1
hour. Additional rainfall amounts of 1 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 urban areas, highways, streets and
underpasses as well as other poor drainage and low-
lying areas.
* Some locations that will experience flash flooding include...
Northeast Detroit, the Grosse Pointes and Harper Woods.
This includes the following highways...
I-94 between mile markers 217 and 225.
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 4238 8308 4245 8309 4245 8287 4244 8287
4241 8288 4236 8291 4235 8298
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
SC2 follow-up statements
371
WGUS73 KDTX 302158
FFSDTX
Flash Flood Statement
National Weather Service Detroit/Pontiac MI
558 PM EDT Wed Jun 30 2021
MIC163-010030-
/O.CON.KDTX.FF.W.0002.000000T0000Z-210701T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne MI-
558 PM EDT Wed Jun 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM EDT THIS
EVENING FOR NORTHEASTERN WAYNE COUNTY...
At 558 PM EDT, There were reports of flooding along 1-94 in
northeast Detroit. Doppler radar estimated between 1 and 2 inches of
rain fell, much of which occurred in less than an hour.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of urban areas, highways, streets and
underpasses as well as other poor drainage and low-lying
areas.
Some locations that will experience flash flooding include...
Northeast Detroit, the Grosse Pointes and Harper Woods.
This includes the following highways...
I-94 between mile markers 217 and 225.
Rainfall is slowly coming to end across the warned area. It will
however take some time for the water to recede.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4238 8308 4245 8309 4245 8287 4244 8287
4241 8288 4236 8291 4235 8298
FLASH FLOOD...RADAR INDICATED
$$
SC540
WGUS73 KDTX 302330
FFSDTX
Flash Flood Statement
National Weather Service Detroit/Pontiac MI
730 PM EDT Wed Jun 30 2021
MIC163-302340-
/O.CAN.KDTX.FF.W.0002.000000T0000Z-210701T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne MI-
730 PM EDT Wed Jun 30 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN WAYNE COUNTY...
Flood waters are receding. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4238 8308 4245 8309 4245 8287 4244 8287
4241 8288 4236 8291 4235 8298
$$
SCThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 4:57 PM EDT | Special Weather Statement | DTX | Wayne | 63 min |
| Jun 30, 7:42 PM EDT | Special Weather Statement | DTX | Tuscola | 63 min |
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.