Alert archive / Michigan / Flash Flood Warnings in 2011

Flash Flood Warning 16, NWS Grand Rapids, MI

July 29, 20114 counties in Michigan

NWS Grand Rapids, MI issued this flash flood warning at Jul 29, 2011, 12:44 AM EDT for 4 counties in Michigan. It was in force for 8 hr. 13 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 29, 2011, 12:44 AM EDT (04:44 UTC)
Expired: Jul 29, 2011, 8:39 AM EDT
In force: 8 hr
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Flood severity: None

Counties Allegan County, MI, Barry County, MI, Eaton County, MI, Ingham County, MI

The radar

The Grand Rapids radar (KGRR), 65 km from the middle of the area, began a volume at 04:48 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 29, 1:37 AM EDT	HEAVY RAIN 1.32	N Lansing, MI	3 HOUR RAINFALL ENDING AT 120 AM.
Jul 29, 2:15 AM EDT	FLOOD	Potterville, MI	INTERSTATE 69 CLOSED BETWEEN VERMONTVILLE ROAD AND WINDSOR ROAD DUE TO FLOODING.
Jul 29, 2:30 AM EDT	FLASH FLOOD	3 Ene Woodland, MI	SADDLEBAG LAKE ROAD CLOSED DUE TO WATER OVER THE ROAD. BARRY COUNTY ROAD COMMISSION ALSO INDICATED THAT THERE WERE NUMEROUS ROAD WASHOUTS THROUGHOUT THE COUNTY. TIME ESTIMATED.
Jul 29, 6:00 AM EDT	HEAVY RAIN 4	Hastings, MI	24 HOUR TOTAL
Jul 29, 6:29 AM EDT	HEAVY RAIN 3	1 Se Bellevue, MI	24 HOUR TOTAL
Jul 29, 6:29 AM EDT	HEAVY RAIN 3.5	Grand Ledge, MI	24 HOUR TOTAL. RECEIVED FROM WILX TV.
Jul 29, 6:40 AM EDT	FLOOD	1 Sse Potterville, MI	INTERSTATE 69 SOUTHBOUND NEAR POTTERVILLE STILL CLOSED DUE TO FLOODING. RELAYED BY WLNS AND WILX.
Jul 29, 6:45 AM EDT	HEAVY RAIN 1.69	2 W Wayland, MI	24 HOUR TOTAL
Jul 29, 7:00 AM EDT	HEAVY RAIN 1.72	2 Ne Lansing, MI	24 HOUR TOTAL
Jul 29, 7:00 AM EDT	HEAVY RAIN 2	2 Ssw Lansing, MI	24 HOUR TOTAL
Jul 29, 7:00 AM EDT	HEAVY RAIN 2.9	Dimondale, MI	24 HOUR TOTAL
Jul 29, 7:00 AM EDT	HEAVY RAIN 4.13	2 W Eaton Rapids, MI	24 HOUR TOTAL
Jul 29, 8:15 AM EDT	HEAVY RAIN 2.17	Lansing, MI	24 HOUR TOTAL

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, 4.7 hours before the alert went out and 117 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2191 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

907 
WGUS53 KGRR 290444
FFWGRR
MIC005-015-045-065-291330-
/O.NEW.KGRR.FF.W.0016.110729T0444Z-110729T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1244 AM EDT FRI JUL 29 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLEGAN COUNTY IN SOUTHWEST MICHIGAN...
  BARRY COUNTY IN SOUTHWEST MICHIGAN...
  EATON COUNTY IN SOUTH CENTRAL MICHIGAN...
  INGHAM COUNTY IN SOUTH CENTRAL MICHIGAN...

* UNTIL 930 AM EDT

* AT 1241 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.     
  OVER THREE INCHES OF RAIN FELL LAST NIGHT...WITH LOCALLY FIVE TO   
  SEVEN INCHES REPORTED IN SPOTS. SIMILAR AMOUNTS ARE QUITE POSSIBLE 
  AGAIN OVERNIGHT. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALLEGAN...CHARLOTTE...HASTINGS...LANSING...SAUGATUCK...BELLEVUE...
  EATON RAPIDS...FENNVILLE...GRAND LEDGE...LESLIE...MASON...
  MIDDLEVILLE...NASHVILLE...PLAINWELL...STOCKBRIDGE...WAYLAND...
  WEBBERVILLE...WILLIAMSTON...BELL OAK...BENTHEIM...BOWENS MILL...
  BRAVO...CARLISLE...CARLTON CENTER...CEDAR CREEK...CHARLESWORTH...
  CHESHIRE CENTER...CHESTER...CHICORA AND CLOVERDALE.

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.

&&

LAT...LON 4243 8414 4242 8628 4277 8621 4278 8421
      4277 8415

$$

MEADE

2 follow-up statements

996 
WGUS73 KGRR 290638
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
238 AM EDT FRI JUL 29 2011

MIC005-015-045-065-291330-
/O.CON.KGRR.FF.W.0016.000000T0000Z-110729T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARRY MI-EATON MI-INGHAM MI-ALLEGAN MI-
238 AM EDT FRI JUL 29 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ALLEGAN...INGHAM...EATON
AND BARRY COUNTIES UNTIL 930 AM EDT...

AT 230 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT HEAVY RAIN HAD ENDED OVER ALLEGAN COUNTY AND MOST OF BARRY 
COUNTY... BUT THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE PERSISTING 
OVER EATON AND INGHAM COUNTIES. 

FLOODED ROADWAYS AND STALLED CARS HAVE BEEN REPORTED IN LANSING AND 
DELTA TOWNSHIPS. INTERSTATE 69 HAS BEEN CLOSED BETWEEN VERMONTVILLE  
HIGHWAY AND WINDSOR ROAD IN EATON COUNTY UNTIL FURTHER NOTICE. 

RADAR INDICATES THAT THE HEAVIEST RAIN SINCE MIDNIGHT HAS FALLEN IN 
A BAND FROM HOPKINS TO HASTINGS TO HOLT TO WILLIAMSTON. 

HERE ARE A FEW THREE HOUR RAINFALL REPORTS AS OF 230 AM FROM 
AUTOMATED WEATHER INSTRUMENTS... CHARLOTTE HAS HAD 2.56 INCHES...  
HASTINGS 2.25...AND BRADLEY IN ALLEGAN COUNTY HAS HAD 3.03.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ALLEGAN...CHARLOTTE...HASTINGS...LANSING...SAUGATUCK...BELLEVUE...
EATON RAPIDS...FENNVILLE...GRAND LEDGE...LESLIE...MASON...
MIDDLEVILLE...NASHVILLE...PLAINWELL...STOCKBRIDGE...WAYLAND...
WEBBERVILLE...WILLIAMSTON...BELL OAK...BENTHEIM...BOWENS MILL...
BRAVO...CARLISLE...CARLTON CENTER...CEDAR CREEK...CHARLESWORTH...
CHESHIRE CENTER...CHESTER...CHICORA AND CLOVERDALE.

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.

&&

LAT...LON 4243 8414 4242 8628 4277 8621 4278 8421
      4277 8415

$$

MEADE

596 
WGUS73 KGRR 291239
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
839 AM EDT FRI JUL 29 2011

MIC005-015-045-065-291253-
/O.CAN.KGRR.FF.W.0016.000000T0000Z-110729T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARRY MI-EATON MI-INGHAM MI-ALLEGAN MI-
839 AM EDT FRI JUL 29 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR ALLEGAN...INGHAM...
EATON AND BARRY COUNTIES IS CANCELLED...

HEAVY RAIN HAS MOVED OFF THIS MORNING AND FLASH FLOODING IS NO 
LONGER AN IMMEDIATE THREAT TO THE AREA. THUS...THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. STANDING WATER MAY STILL BE IN PLACE 
OVER SOME AREAS ROADS. IF YOU ENCOUNTER A FLOODED ROADWAY...TURN 
AROUND DONT DROWN. 

LAT...LON 4243 8414 4242 8628 4277 8621 4278 8421
      4277 8415

$$

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 8:54 PM EDT	River Flood Advisory	GRR	Kent	6 days
Jul 28, 8:54 PM EDT	River Flood Advisory	GRR	Ingham	50 hr
Jul 28, 8:58 PM EDT	River Flood Advisory	GRR	Kalamazoo	63 hr
Jul 28, 9:40 PM EDT	River Flood Warning	GRR	Ingham	4 days
Jul 28, 10:24 PM EDT	Special Weather Statement	GRR	Kalamazoo	66 min
Jul 28, 11:12 PM EDT	Special Weather Statement	GRR	Barry	63 min
Jul 29, 12:26 AM EDT	Special Weather Statement	GRR	Allegan, Barry, Eaton, Van Buren	94 min
Jul 29, 12:59 AM EDT	Special Marine Warning	GRR		2 hr
Jul 29, 1:15 AM EDT	Special Weather Statement	GRR	Kalamazoo, Van Buren	90 min
Jul 29, 1:30 AM EDT	Severe Thunderstorm Warning	GRR	Van Buren	33 min
Jul 29, 1:45 AM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo	45 min
Jul 29, 1:53 AM EDT	Special Weather Statement	GRR	Calhoun, Ingham, Jackson	97 min
Jul 29, 2:13 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Jackson	65 min
Jul 29, 2:49 AM EDT	Special Weather Statement	GRR	Ingham	56 min
Jul 29, 3:51 AM EDT	Areal Flood Advisory	GRR	Calhoun, Jackson, Kalamazoo, Van Buren	12 hr
Jul 29, 8:41 AM EDT	River Flood Advisory	GRR	Ingham	75 min
Jul 29, 8:41 AM EDT	River Flood Advisory	GRR	Clinton	14 hr
Jul 29, 9:52 AM EDT	River Flood Warning	GRR	Ingham	13 hr
Jul 29, 9:52 AM EDT	River Flood Warning	GRR	Barry	4 days
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Eaton	4 days
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Kent	36 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Kent	36 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Kent	5 days
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Ingham	60 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Calhoun	12 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Kalamazoo	12 hr
Jul 29, 10:34 AM EDT	River Flood Advisory	GRR	Allegan	36 hr

Nearby

Flash Flood Warnings in Michigan, 2011 Every 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.