Alert archive / Michigan / Flash Flood Warnings in 2011
Flash Flood Warning 9, NWS Detroit, MI
NWS Detroit, MI issued this flash flood warning at Jul 28, 2011, 4:52 AM EDT for Oakland County, Michigan. It was in force for 6 hr. 16 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
- Jul 28, 2011, 4:52 AM EDT (08:52 UTC)
- Expired
- Jul 28, 2011, 11:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Flood severity
- None
County Oakland County, MI
The radar
The Detroit radar (KDTX), 10 km from the middle of the area, began a volume at 08:52 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 |
|---|---|---|---|
| Jul 28, 6:17 AM EDT | FLOOD | 3 Ene Milford, MI | STREET FLOODING COMMERCE ROAD AND LEDGEWOOD DRIVE. |
| Jul 28, 6:54 AM EDT | HEAVY RAIN 2.72 | Bloomfield Hills, MI | |
| Jul 28, 6:54 AM EDT | HEAVY RAIN 4.25 | Waterford, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 1.93 | Farmington, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 2.28 | Farmington Hills, MI | 15 HOUR RAINFALL TOTAL. |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 2.4 | West Bloomfield, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 2.7 | 1 N Ferndale, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 2.9 | White Lake, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.07 | 5 S Clarkston, MI | 18 HOUR TOTAL AT OAKLAND COUNTY AIRPORT |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.22 | Milford, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.46 | 5 Ssw Clarkston, MI | 18 HOUR TOTAL AT THE NWS OFFICE IN WHITE LAKE |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.48 | Waterford, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.65 | Commerce, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 3.74 | Pontiac, MI | |
| Jul 28, 8:00 AM EDT | HEAVY RAIN 5.13 | Ortonville, MI | |
| Jul 28, 9:00 AM EDT | HEAVY RAIN 3.65 | West Bloomfield, MI |
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 00:00Z, 8.9 hours before the alert went out and 12 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
- 159 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
014 WGUS53 KDTX 280852 FFWDTX MIC125-281500- /O.NEW.KDTX.FF.W.0009.110728T0852Z-110728T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 452 AM EDT THU JUL 28 2011 THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A * FLASH FLOOD WARNING FOR... OAKLAND COUNTY IN SOUTHEAST MICHIGAN... * UNTIL 1100 AM EDT * AT 445 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL MOVING SOUTHEAST INTO THE WARNED AREA. PORTIONS OF OAKLAND COUNTY HAVE ALREADY RECEIVED UP TO 3 INCHES OF RAIN AND AN ADDITIONAL 1 TO 3 INCHES OF RAIN ARE POSSIBLE THROUGH 8 AM. TORRENTIAL RAINFALL RATES UP TO 2 INCHES PER HOUR ARE OCCURRING. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... HOLLY...MILFORD...NOVI...OXFORD...PONTIAC...SOUTHFIELD...TROY... BIRMINGHAM...CLARKSTON...ORTONVILLE...ROCHESTER...ROYAL OAK...SOUTH LYON AND WEST BLOOMFIELD. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DETROIT/PONTIAC. && LAT...LON 4243 8366 4287 8369 4289 8311 4245 8308 $$ KEC
1 follow-up statement
840 WGUS73 KDTX 281125 FFSDTX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 725 AM EDT THU JUL 28 2011 MIC125-281500- /O.CON.KDTX.FF.W.0009.000000T0000Z-110728T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OAKLAND MI- 725 AM EDT THU JUL 28 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR OAKLAND COUNTY UNTIL 1100 AM EDT... BY 700 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT 3 TO 6 INCHES OF RAIN HAVE FALLEN ACROSS OAKLAND COUNTY. ALTHOUGH THE RAIN WILL COME TO AN END BY 830 AM...THE WATER WILL BE SLOW TO RECEDE AND FLOODING WILL CONTINUE ACROSS THE WARNING AREA. SMALL CREEKS AND RIVERS WILL BE RUNNING HIGH AND SHOULD BE AVOIDED. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...HOLLY...MILFORD...OXFORD...PONTIAC...CLARKSTON... ORTONVILLE...COMMERCE TOWNSHIP...BLOOMFIELD HILLS. FLOODING HAS BEEN REPORTED ON MANY ROADS ACROSS OAKLAND COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC. && LAT...LON 4243 8366 4287 8369 4289 8311 4245 8308 $$ KEC
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 9:20 PM EDT | Areal Flood Advisory | DTX | Genesee, Shiawassee | 4 hr |
| Jul 27, 11:09 PM EDT | Areal Flood Advisory | DTX | Washtenaw | 4 hr |
| Jul 27, 11:09 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 51 min |
| Jul 27, 11:55 PM EDT | Flash Flood Warning | DTX | Washtenaw | 6 hr |
| Jul 28, 12:47 AM EDT | Areal Flood Advisory | DTX | Livingston | 6 hr |
| Jul 28, 1:21 AM EDT | Flash Flood Warning | DTX | Monroe, Wayne | 6 hr |
| Jul 28, 3:23 AM EDT | Areal Flood Advisory | DTX | Genesee, Oakland, Saginaw, Shiawassee | 6 hr |
| Jul 28, 4:31 AM EDT | Flash Flood Warning | DTX | Genesee, Saginaw, Shiawassee | 6 hr |
| Jul 28, 5:51 AM EDT | Areal Flood Warning | DTX | Washtenaw | 8 hr |
| Jul 28, 6:01 AM EDT | Areal Flood Advisory | DTX | Macomb | 4 hr |
| Jul 28, 7:04 AM EDT | Areal Flood Advisory | DTX | Wayne | 3 hr |
| Jul 28, 10:06 AM EDT | Areal Flood Warning | DTX | Genesee, Oakland, Saginaw, Shiawassee | 4 hr |
| Jul 28, 10:11 AM EDT | River Flood Warning | DTX | Washtenaw | 25 hr |
| Jul 28, 10:11 AM EDT | River Flood Warning | DTX | Macomb | 7 hr |
| Jul 28, 3:16 PM EDT | Flash Flood Watch | DTX | Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 6 more | 16 hr |
Nearby
Flash Flood Warnings in Michigan, 2011Every flash flood warning in 2011
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.