Alert archive / Michigan / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS Grand Rapids, MI

June 21, 2011Ottawa County, Michigan

NWS Grand Rapids, MI issued this flash flood warning at Jun 21, 2011, 6:20 PM EDT for Ottawa County, Michigan. It was in force for 17 hr. 6 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
Jun 21, 2011, 6:20 PM EDT (22:20 UTC)
Expired
Jun 22, 2011, 11:30 AM EDT
In force
17 hr
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon
Flood severity
None

County Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 44 km from the middle of the area, began a volume at 22:20 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

TimeReportWhereRemark
Jun 21, 6:22 PM EDTHEAVY RAIN 3.25Allendale, MISTORM TOTAL SO FAR.
Jun 21, 7:15 PM EDTFLASH FLOODJenison, MIESTIMATED ONE FOOT OF STANDING WATER ON BALDWIN ST BETWEEN MAIN ST AND COTTONWOOD DR.
Jun 21, 8:29 PM EDTHEAVY RAIN 5Hudsonville, MITOTAL RAINFALL FROM THIS AFTERNOON AND EVENING.
Jun 22, 6:30 AM EDTHEAVY RAIN 3.742 Wsw Walker, MITHIS WAS A 24 HOUR TOTAL.
Jun 22, 7:00 AM EDTHEAVY RAIN 4.43Allendale, MITHIS WAS A 24 HOUR TOTAL.
Jun 22, 7:29 AM EDTHEAVY RAIN 1.26Nunica, MITHIS WAS A 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 12:00Z, 10.3 hours before the alert went out and 217 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2011-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 874 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2011-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
874 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

253 
WGUS53 KGRR 212220
FFWGRR
MIC139-220330-
/O.NEW.KGRR.FF.W.0007.110621T2220Z-110622T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
620 PM EDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  OTTAWA COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 1130 PM EDT

* AT 618 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS OTTAWA 
  COUNTY. RADAR ESTIMATED RAINFALL AMOUNTS OF 3 TO 5 INCHES HAVE 
  OCCURRED NEAR ALLENDALE AND BAUER. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...GRAND
  HAVEN...HOLLAND...COOPERSVILLE...HUDSONVILLE...AGNEW...BEAVERDAM...
  BORCULO...CRISP...DENNISON...FOREST GROVE...GRAND VALLEY...NEW
  HOLLAND...NOORDELOOS...NORTH BLENDON...PINE CREEK...ROSABELLE
  BEACH...SNUG HARBOR...SOUTH BLENDON...TALLMADGE...VRIESLAND AND
  WEST OLIVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4312 8627 4312 8591 4313 8591 4313 8579
      4291 8578 4277 8579 4277 8622 4286 8622
      4302 8624 4307 8627

$$

DUKE
2 follow-up statements
351 
WGUS53 KGRR 220148
FFWGRR
MIC139-221530-
/O.EXT.KGRR.FF.W.0007.000000T0000Z-110622T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
948 PM EDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  OTTAWA COUNTY IN SOUTHWEST MICHIGAN...

* UNTIL 1130 AM EDT WEDNESDAY

* TRAINED SPOTTERS HAVE REPORTED UP TO 5 INCHES OF RAIN NORTH OF THE
  HUDSONVILLE AREA. DOPPLER RADAR INDICATES THAT AROUND 5 INCHES OF 
  RAIN HAS FALLEN IN A BAND FROM THE BORCULO AREA TO THE 
  COOPERSVILLE AND MARNE AREAS.

* AT 945 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
  FLOODING ACROSS THE WARNED AREA. ROAD WASHOUTS HAVE BEEN REPORTED 
  BY LAW ENFORCEMENT NEAR THE INTERSECTION OF 48TH AND PIERCE ROADS 
  AND LAKE MICHIGAN DRIVE AND PIERCE ROAD.

* LAW ENFORCEMENT ALSO REPORTS THAT MANY ROADS STILL HAVE STANDING 
  WATER ON THEM IN THE TALLMADGE TOWNSHIP AND ALLENDALE AREAS.

* SOME LOCATIONS THAT WILL EXPERIENCE THE WORST FLOODING    
  INCLUDE...COOPERSVILLE...HUDSONVILLE...BORCULO...CRISP...
  DENNISON...FOREST GROVE...GRAND VALLEY...NEW HOLLAND...
  NOORDELOOS...NORTH BLENDON...SOUTH BLENDON...AND TALLMADGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4312 8627 4312 8591 4313 8591 4313 8579
      4291 8578 4277 8579 4277 8622 4286 8622
      4302 8624 4307 8627

$$

NJJ
908 
WGUS73 KGRR 221526
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1126 AM EDT WED JUN 22 2011

MIC139-221540-
/O.EXP.KGRR.FF.W.0007.000000T0000Z-110622T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OTTAWA MI-
1126 AM EDT WED JUN 22 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR OTTAWA COUNTY WILL
BE ALLOWED TO EXPIRE AT 1130 AM EDT...

THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A FLOOD ADVISORY.

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4312 8627 4312 8591 4313 8591 4313 8579
      4291 8578 4277 8579 4277 8622 4286 8622
      4302 8624 4307 8627

$$

WDM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 5:39 AM EDTSpecial Weather StatementGRRNewaygo81 min
Jun 21, 4:20 PM EDTSpecial Weather StatementGRROttawa40 min
Jun 21, 4:31 PM EDTSevere Thunderstorm WarningGRRMuskegon, Ottawa59 min
Jun 21, 5:29 PM EDTAreal Flood AdvisoryGRRMuskegon, Ottawa18 hr
Jun 21, 5:29 PM EDTSevere Thunderstorm WarningGRRKent, Muskegon, Ottawa61 min
Jun 21, 5:39 PM EDTSpecial Marine WarningGRR2 hr
Jun 21, 5:41 PM EDTSevere Thunderstorm WarningGRRMuskegon, Newaygo, Oceana64 min
Jun 21, 5:59 PM EDTSevere Thunderstorm WarningGRRAllegan, Kent, Ottawa61 min
Jun 21, 6:03 PM EDTSevere Thunderstorm WarningGRRVan Buren43 min
Jun 21, 6:14 PM EDTAreal Flood AdvisoryGRRAllegan, Van Buren6 hr
Jun 21, 6:25 PM EDTSevere Thunderstorm WarningGRRKent, Ottawa50 min
Jun 21, 6:26 PM EDTTornado WarningGRRAllegan34 min
Jun 21, 6:28 PM EDTAreal Flood AdvisoryGRRKent17 hr
Jun 21, 6:37 PM EDTSevere Thunderstorm WarningGRRCalhoun, Kalamazoo83 min
Jun 21, 6:39 PM EDTAreal Flood AdvisoryGRRNewaygo, Oceana17 hr
Jun 21, 6:44 PM EDTSevere Thunderstorm WarningGRRMecosta, Newaygo76 min
Jun 21, 6:59 PM EDTSevere Thunderstorm WarningGRRAllegan46 min
Jun 21, 7:00 PM EDTSevere Thunderstorm WarningGRRKent, Ottawa45 min
Jun 21, 7:03 PM EDTFlash Flood WarningGRRKent3 hr
Jun 21, 7:21 PM EDTAreal Flood AdvisoryGRRCalhoun4 hr
Jun 21, 7:25 PM EDTSevere Thunderstorm WarningGRRIonia, Montcalm65 min
Jun 21, 7:59 PM EDTSevere Thunderstorm WarningGRRGratiot, Isabella, Montcalm91 min

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.