Alert archive / Michigan / Flash Flood Warnings in 2012
Flash Flood Warning 4, NWS Detroit, MI
NWS Detroit, MI issued this flash flood warning at May 4, 2012, 2:54 AM EDT for Genesee County, Shiawassee County, Michigan. It was in force for 6 hr. 15 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
- May 4, 2012, 2:54 AM EDT (06:54 UTC)
- Expired
- May 4, 2012, 9:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Genesee County, MI, Shiawassee County, MI
The radar
The Detroit radar (KDTX), 50 km from the middle of the area, began a volume at 06:54 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 |
|---|---|---|---|
| May 4, 4:00 AM EDT | FLOOD | 8 E Corunna, MI | SHIAWASSE CENTRAL DISPATCH REPORTED SEVERAL FEET OF WATER COVERING M 21 NEAR BYRON ROAD. |
| May 4, 4:00 AM EDT | FLOOD | Flint, MI | A SPOTTER REPORTED AT LEAST TWO FEET OF WATER COVERING MANY ROADS IN DOWNTOWN FLINT. |
| May 4, 4:00 AM EDT | FLOOD | Swartz Creek, MI | GENESSE COUNTY CENTRAL DISPATCH REPORT EXTENSIVE FLOODING THROUGHOUT THE COUNTY. SEVERAL HOMES HAVE FLOODED AND NUMEROUS ROADS ARE SHUT DOWN...INCLUDING SECTIONS OF I-75 AND I-69. THE MOST EXTENSIVE FLOODING IS IN SWARTZ CREEK AND FLINT TOWNSHIP. |
| May 4, 4:30 AM EDT | FLOOD | Swartz Creek, MI | SEVERE FLOODING WAS REPORTED AT THE APPLE CREEK APARTMENT COMPLEX. MANY RESIDENTS HAD TO EVACUATE AS THE WATER ROSE SEVERAL FEET DEEP. |
| May 4, 4:40 AM EDT | HEAVY RAIN 4.82 | 5 Sse Flint, MI | 11 HOUR RAINFALL TOTAL. FLOODING REPORTED THROUGHOUT MUCH OF THE COUNTY. |
| May 4, 6:00 AM EDT | FLOOD | Grand Blanc, MI | IT WAS REPORTED THAT SEVERAL FEET OF WATER WAS SURROUNDING THE KNOLLWOOD APARTMENT COMPLEX ON HILL ROAD. |
| May 4, 6:00 AM EDT | HEAVY RAIN 3.89 | Corunna, MI | 24 HOUR TOTAL. |
| May 4, 6:45 AM EDT | HEAVY RAIN 1.95 | Owosso, MI | 24 HOUR TOTAL. |
| May 4, 7:00 AM EDT | HEAVY RAIN 1.63 | Burton, MI | 24 HOUR TOTAL. |
| May 4, 7:10 AM EDT | FLOOD | Gaines, MI | SEVERAL ROADS IMPASSABLE ALONG MORRISH ROAD BETWEEN HILL AND GRAND BLANC ROADS. |
| May 4, 7:30 AM EDT | HEAVY RAIN 3.52 | Goodrich, MI | 24 HOUR TOTAL. |
| May 4, 8:00 AM EDT | HEAVY RAIN 1.01 | Durand, MI | 24 HOUR TOTAL. |
| May 4, 8:00 AM EDT | HEAVY RAIN 3.16 | 7 W Flint, MI | 24 HOUR TOTAL. |
| May 4, 8:00 AM EDT | HEAVY RAIN 4.77 | 5 Sse Flushing, MI | 24 HOUR TOTAL. |
| May 4, 8:00 AM EDT | HEAVY RAIN 5.48 | Flint, MI | 24 HOUR TOTAL AT FLINT BISHOP AIRPORT. |
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, 6.9 hours before the alert went out and 51 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
- 682 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1887 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
115
WGUS53 KDTX 040654
FFWDTX
MIC049-155-041300-
/O.NEW.KDTX.FF.W.0004.120504T0654Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
254 AM EDT FRI MAY 4 2012
THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
* FLASH FLOOD WARNING FOR...
GENESEE COUNTY IN SOUTHEAST MICHIGAN...
SHIAWASSEE COUNTY IN SOUTHEAST MICHIGAN...
* UNTIL 900 AM EDT
* AT 250 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. SINCE LAST EVENING...RADAR INDICATED ANYWHERE BETWEEN
2 AND 5 INCHES HAVE FALLEN.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CLIO...DAVISON...DURAND...FENTON...FLINT...FLUSHING...GRAND
BLANC...LAINGSBURG...NEW LOTHROP...OWOSSO...PERRY...BANCROFT...
BURTON...BYRON...CORUNNA...GAINES...GOODRICH...HENDERSON...
LENNON...LINDEN...MONTROSE...MORRICE...MOUNT MORRIS...OTISVILLE AND
SWARTZ CREEK.
BOTH GENESEE AND SHIAWASSEE CENTRAL DISPATCHES HAVE REPORTED
NUMEROUS REPORTS OF FLOODED ROADWAYS...ESPECIALLY IN AND AROUND
OWOSSO...SWARTZ CREEK...FLINT AND GRAND BLANC.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS BETWEEN ONE AND TWO INCHES ARE POSSIBLE
IN THE WARNED AREA.
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. RESIDENTS LIVING ALONG STREAMS AND CREEKS
SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
SC5 follow-up statements
104
WGUS73 KDTX 040748
FFSDTX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
348 AM EDT FRI MAY 4 2012
MIC049-155-041300-
/O.CON.KDTX.FF.W.0004.000000T0000Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE MI-SHIAWASSEE MI-
348 AM EDT FRI MAY 4 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SHIAWASSEE AND GENESEE
COUNTIES UNTIL 900 AM EDT...
AT 347 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
PERSISTENT THUNDERSTORMS OVER PORTIONS OF THE WARNED AREA. THESE
STORMS WILL CONTINUE THROUGH AT LEAST 5 AM BEFORE WEAKENING. DOPPLER
RADAR PRECIP ESTIMATES SINCE LAST EVENING INDICATE 3 TO 6 INCHES OF
RAIN HAS FALLEN ALONG AN AXIS FROM OWOSSO TO GRAND BLANC...WITH THE
HIGHEST AMOUNTS IN AND AROUND CORUNNA...LENNON AND SWARTZ CREEK.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLIO...DAVISON...DURAND...FENTON...FLINT...FLUSHING...GRAND BLANC...
LAINGSBURG...NEW LOTHROP...OWOSSO...PERRY...BANCROFT...BURTON...
BYRON...CORUNNA...GAINES...GOODRICH...HENDERSON...LENNON...LINDEN...
MONTROSE...MORRICE...MOUNT MORRIS...OTISVILLE AND SWARTZ CREEK.
BOTH GENESEE AND SHIAWASSEE COUNTY CENTRAL DISPATCHES HAVE RECEIVED
NUMEROUS REPORTS OF FLOODED ROADS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
SC397
WGUS73 KDTX 040833
FFSDTX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
433 AM EDT FRI MAY 4 2012
MIC049-155-041300-
/O.CON.KDTX.FF.W.0004.000000T0000Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE MI-SHIAWASSEE MI-
433 AM EDT FRI MAY 4 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SHIAWASSEE AND GENESEE
COUNTIES UNTIL 900 AM EDT...
AT 427 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THUNDERSTORMS HAVE BEEN DIMINISHING IN COVERAGE ACROSS THE
AREA. THIS TREND WILL CONTINUE THROUGH 8 AM. HOWEVER...RADAR HAS
ESTIMATED STORM TOTAL RAINFALL SINCE LAST EVENING OF 4 TO 6.5 INCHES
ALONG A CORRIDOR FROM JUDDVILLE IN NORTHEAST SHIAWASSEE COUNTY TO
GOODRICH IN SOUTHEAST GENESSEE COUNTY...WITH THE HIGHEST TOTALS IN
AND AROUND LENNON...SWARTZ CREEK...FLINT TOWNSHIP AND GRAND BLANC.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLIO...DAVISON...DURAND...FENTON...FLINT...FLUSHING...GRAND BLANC...
LAINGSBURG...NEW LOTHROP...OWOSSO...PERRY...BANCROFT...BURTON...
BYRON...CORUNNA...GAINES...GOODRICH...HENDERSON...LENNON...LINDEN...
MONTROSE...MORRICE...MOUNT MORRIS...OTISVILLE AND SWARTZ CREEK.
LAW ENFORCEMENT HAVE REPORTED NUMEROUS ROADS UNDERWATER. THIS HAS
LED TO MANY ROAD CLOSURES ACROSS THE AREA. THERE HAVE ALSO BEEN
REPORTS OF HOMES FLOODED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS HEAVY RAIN WILL CONTINUE TO CAUSE
FLOODING OF SMALL CREEKS AND STREAMS...URBAN
AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.
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.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
SC119
WGUS73 KDTX 041008
FFSDTX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
608 AM EDT FRI MAY 4 2012
MIC049-155-041300-
/O.CON.KDTX.FF.W.0004.000000T0000Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE MI-SHIAWASSEE MI-
608 AM EDT FRI MAY 4 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SHIAWASSEE AND GENESEE
COUNTIES UNTIL 900 AM EDT...
AT 558 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SOME REDEVELOPMENT OF THUNDERSTORMS ACROSS NORTHEAST SHIAWASSEE AND
NORTH CENTRAL GENESEE COUNTIES. THESE STORMS ARE A LITTLE FARTHER
NORTH THAN LOCATIONS WHICH RECEIVED THE MOST EXCESSIVE RAINFALL
OVERNIGHT. HOWEVER...THEY MAY LEAD TO SOME ADDITIONAL FLOODING
CONCERNS IN AND AROUND NEW LOTHROP AND FLUSHING. THE STORMS ARE
EXPECTED TO DISSIPATE SHORTLY AFTER DAYBREAK.
RADAR HAS ESTIMATED STORM TOTAL RAINFALL SINCE LAST EVENING OF 4 TO
6.5 INCHES ALONG A CORRIDOR FROM JUDDVILLE IN NORTHEAST SHIAWASSEE
COUNTY TO GOODRICH IN SOUTHEAST GENESSEE COUNTY...WITH THE HIGHEST
TOTALS IN AND AROUND LENNON...SWARTZ CREEK...FLINT TOWNSHIP AND
GRAND BLANC.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CONTINUE TO CAUSE FLASH
FLOODING. LAW ENFORCEMENT...SPOTTERS AND BROADCAST MEDIA HAVE ALL
REPORTED SEVERE FLOODING ON MANY ROADS ACROSS THE AREA. IN SOME
CASES...THE WATER HAS BEEN SEVERAL FEET DEEP. MANY ROADS ARE
CLOSED...WITH THE MOST EXTENSIVE ROAD CLOSERS IN FLINT TOWNSHIP AND
SWARTZ CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM LAST NIGHTS HEAVY RAINS WILL CONTINUE TO CAUSE
FLOODING OF SMALL CREEKS AND STREAMS... URBAN AREAS...
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS
AND LOW LYING SPOTS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
SC595
WGUS73 KDTX 041128
FFSDTX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
728 AM EDT FRI MAY 4 2012
MIC049-155-041300-
/O.CON.KDTX.FF.W.0004.000000T0000Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE MI-SHIAWASSEE MI-
728 AM EDT FRI MAY 4 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SHIAWASSEE AND GENESEE
COUNTIES UNTIL 900 AM EDT...
AT 722 AM EDT...RADAR INDICATED THAT THE HEAVY RAINFALL HAS FINALLY
ENDED. NO ADDITIONAL HEAVY RAIN IS EXPECTED THROUGH THE REST OF THE
MORNING. HOWEVER...RADAR RAINFALL ESTIMATES AND SPOTTER RAIN GAUGE
REPORTS ARE INDICATING THAT ANYWHERE FROM 4 TO 6.5 INCHES OF RAIN
FELL LAST NIGHT ALONG A CORRIDOR FROM NEW LOTHROP TO GOODRICH...WITH
THE HIGHEST AMOUNTS OCCURRING IN AND AROUND LENNON...SWARTZ
CREEK...FLINT TOWNSHIP AND GRAND BLANC. THERE ARE STILL NUMEROUS
ROADS UNDER SEVERAL FEET OF WATER. SO ALTHOUGH THE HEAVY RAIN HAS
ENDED...THE FLOODING CONTINUES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM LAST NIGHTS HEAVY RAIN WILL CONTINUE TO CAUSE
RAPID RISES OF SMALL CREEKS AND STREAMS. WIDESPREAD FLOODING WILL
ALSO PERSIST THIS MORNING IN URBAN AREAS...AND ON HIGHWAYS...STREETS
AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
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.
&&
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
SC456
WGUS73 KDTX 041256
FFSDTX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
856 AM EDT FRI MAY 4 2012
MIC049-155-041310-
/O.EXP.KDTX.FF.W.0004.000000T0000Z-120504T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GENESEE MI-SHIAWASSEE MI-
856 AM EDT FRI MAY 4 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SHIAWASSEE AND
GENESEE COUNTIES WILL BE ALLOWED TO EXPIRE AT 900 AM EDT...
THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 9 AM...REPLACED
BY AN AREAL FLOOD WARNING TO ADDRESS THE ONGOING FLOODING.
PERSISTENT RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CONTINUE THROUGH
THE DAY...WITH THE FLOODING CONDITIONS SLOW TO RECEDE.
LAT...LON 4313 8436 4313 8393 4322 8393 4322 8346
4289 8346 4286 8369 4278 8369 4277 8436
$$
MRThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 10:36 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 39 min |
| May 3, 10:54 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 49 min |
| May 4, 1:37 AM EDT | Areal Flood Advisory | DTX | Genesee | 4 hr |
| May 4, 1:44 AM EDT | Areal Flood Advisory | DTX | Shiawassee | 4 hr |
| May 4, 2:09 AM EDT | Areal Flood Advisory | DTX | Livingston | 4 hr |
| May 4, 3:54 AM EDT | Areal Flood Advisory | DTX | Oakland | 3 hr |
| May 4, 5:29 AM EDT | River Flood Warning | DTX | Genesee | 10 hr |
| May 4, 7:48 AM EDT | River Flood Warning | DTX | Genesee, Saginaw | 15 hr |
| May 4, 8:54 AM EDT | Areal Flood Warning | DTX | Genesee, Shiawassee | 8 hr |
| May 4, 2:56 PM EDT | Small Craft Advisory | DTX | 31 hr |
Nearby
Flash Flood Warnings in Michigan, 2012Every flash flood warning in 2012
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.