Alert archive / Michigan / Flash Flood Warnings in 2011

Flash Flood Warning 18, NWS Grand Rapids, MI

August 2, 2011Lake County, Mecosta County, Newaygo County, Michigan

NWS Grand Rapids, MI issued this flash flood warning at Aug 2, 2011, 11:39 PM EDT for Lake County, Mecosta County, Newaygo County, Michigan. It was in force for 6 hr. 4 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 2, 2011, 11:39 PM EDT (03:39 UTC)
Expired: Aug 3, 2011, 5:14 AM EDT
In force: 6 hr
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Flood severity: None

Counties Lake County, MI, Mecosta County, MI, Newaygo County, MI

The radar

The Grand Rapids radar (KGRR), 96 km from the middle of the area, began a volume at 03:42 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 2, 11:55 PM EDT	FLASH FLOOD	3 W Chase, MI	3 FOOT DEEP ROAD WASH OUT AT 56TH AND QUEENS HIGHWAY IN YATES TOWNSHIP. TIME ESTIMATED VIA RADAR AS TO WHEN HEAVIEST RAIN HAD FALLEN.
Aug 3, 12:34 AM EDT	FLASH FLOOD	Big Rapids, MI	STATE STREET REMAINS CLOSED BETWEEN PERE MARQUETTE AND FERRIS DRIVE.
Aug 3, 5:19 AM EDT	HEAVY RAIN 4.25	Paris, MI
Aug 3, 5:19 AM EDT	HEAVY RAIN 5.97	Big Rapids, 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, 3.7 hours before the alert went out and 207 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: 2392 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 692 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 12.8

Open this sounding in Storm Lab

The text

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

186 
WGUS53 KGRR 030339
FFWGRR
MIC085-107-123-031530-
/O.NEW.KGRR.FF.W.0018.110803T0339Z-110803T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1139 PM EDT TUE AUG 2 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MECOSTA COUNTY IN CENTRAL MICHIGAN...
  NORTHEASTERN NEWAYGO COUNTY IN WEST CENTRAL MICHIGAN...
  SOUTHEASTERN LAKE COUNTY IN WEST CENTRAL MICHIGAN...

* UNTIL 1130 AM EDT WEDNESDAY

* AT 1135 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH HEAVY RAIN PERSISTING OVER THE WARNED AREA.     
  FROM THREE TO FIVE INCHES OF RAIN HAS FALLEN IN A BAND FROM        
  BALDWIN TO BIG RAPIDS SINCE 9 PM... AND ANOTHER INCH OR TWO IS     
  STILL POSSIBLE. 

* MECOSTA COUNTY EMERGENCY MANAGEMENT INDICATES THAT STATE STREET IN 
  BIG RAPIDS IS CLOSED DUE TO HIGH WATER CAUSING VEHICLES TO STALL   
  OUT. 4.11 INCHES OF RAIN WAS REPORTED OVER A TWO HOUR PERIOD IN    
  BIG RAPIDS.  

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BALDWIN...
  BIG RAPIDS...MECOSTA...MORLEY...CANADIAN LAKES...LILLEY AND
  RUSTFORD.

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 4389 8557 4382 8556 4381 8525 4347 8520
      4347 8556 4374 8586 4394 8586

$$

MEADE

1 follow-up statement

484 
WGUS73 KGRR 030914
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
514 AM EDT WED AUG 3 2011

MIC085-107-123-030922-
/O.CAN.KGRR.FF.W.0018.000000T0000Z-110803T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAKE MI-MECOSTA MI-NEWAYGO MI-
514 AM EDT WED AUG 3 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN
NEWAYGO...MECOSTA AND SOUTHEASTERN LAKE COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. 
MECOSTA COUNTY EMERGENCY MANAGEMENT REPORTS THAT FLOOD WATERS ON 
STATE STREET IN BIG RAPIDS HAVE RECEDED. 

RADAR ESTIMATES THAT THREE TO POSSIBLY SIX INCHES OF RAIN FELL FROM 
SOUTHEAST OF BALDWIN TO BIG RAPIDS. MUCH OF THE RAIN FELL IN RURAL 
AREAS. DAYLIGHT MAY REVEAL SOME WASHOUTS OF BACK ROADS...SO YOU ARE 
URGED TO USE CAUTION THIS MORNING IF YOU ARE TRAVELLING BETWEEN 
IDLEWILD...CHASE...HAWKINS...PARIS AND BIG RAPIDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF FLOODING HAS BEEN OBSERVED OR YOU COME ACROSS A ROAD WASHOUT...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO 
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS.

&&

LAT...LON 4389 8557 4382 8556 4381 8525 4347 8520
      4347 8556 4374 8586 4394 8586

$$

DUKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 8:37 PM EDT	Special Weather Statement	GRR	Van Buren	53 min
Aug 2, 9:28 PM EDT	Special Weather Statement	GRR	Calhoun, Kalamazoo	62 min
Aug 2, 9:48 PM EDT	River Flood Advisory	GRR	Barry	5 days
Aug 2, 9:48 PM EDT	Special Marine Warning	GRR		57 min
Aug 2, 9:55 PM EDT	Special Weather Statement	GRR	Muskegon, Newaygo, Oceana	95 min
Aug 2, 10:40 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Newaygo	73 min
Aug 2, 10:46 PM EDT	Special Marine Warning	GRR		119 min
Aug 2, 11:05 PM EDT	Areal Flood Advisory	GRR	Lake, Mecosta, Newaygo, Osceola	12 hr
Aug 2, 11:36 PM EDT	Special Weather Statement	GRR	Allegan, Barry, Kalamazoo, Ottawa, Van Buren	54 min
Aug 3, 12:59 AM EDT	Special Weather Statement	GRR	Calhoun, Clinton, Eaton, Ingham, Kalamazoo	61 min
Aug 3, 11:18 AM EDT	River Flood Advisory	GRR	Kent	10 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.