Alert archive / Michigan / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Grand Rapids, MI

July 4, 2012Isabella County, Mecosta County, Michigan

NWS Grand Rapids, MI issued this flash flood warning at Jul 4, 2012, 6:15 PM EDT for Isabella County, Mecosta County, Michigan. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 4, 2012, 6:15 PM EDT (22:15 UTC)
Expired: Jul 4, 2012, 10:35 PM EDT
In force: 4 hr
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Flood severity: None

Counties Isabella County, MI, Mecosta County, MI

The radar

The Grand Rapids radar (KGRR), 88 km from the middle of the area, began a volume at 22:17 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.3 hours before the alert went out and 161 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: 2763 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1189 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

061 
WGUS53 KGRR 042215
FFWGRR
MIC073-107-050400-
/O.NEW.KGRR.FF.W.0005.120704T2215Z-120705T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
615 PM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN MECOSTA COUNTY IN CENTRAL MICHIGAN...
  SOUTHWESTERN ISABELLA COUNTY IN CENTRAL MICHIGAN...

* UNTIL MIDNIGHT EDT

* AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RADAR ESTIMATES THAT OVER 2 INCHES OF RAIN HAD FALLEN
  AROUND BROOMFIELD CENTER.  PONY CREEK WHICH FLOWS SOUTHEAST 
  THROUGH THIS REGION HAS SEEN THE HEAVIEST RAIN.

*  THE STORM IS NEARLY STATIONARY AND STORM TOTAL RAINFALL AMOUNTS
   COULD LOCALLY EXCEED 4 INCHES ESPECIALLY AROUND BROOMFIELD CENTER
   BEFORE THE STORM ENDS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BROOMFIELD CENTER...MILLBROOK...ROLLAND CENTER AND TITUS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4366 8497 4358 8489 4347 8485 4347 8514
      4356 8515 4370 8514

$$

MJS

2 follow-up statements

664 
WGUS73 KGRR 042335
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
735 PM EDT WED JUL 4 2012

MIC073-107-050400-
/O.CON.KGRR.FF.W.0005.000000T0000Z-120705T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ISABELLA MI-MECOSTA MI-
735 PM EDT WED JUL 4 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN MECOSTA AND
SOUTHWESTERN ISABELLA COUNTIES UNTIL MIDNIGHT EDT...

AT 731 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THE THUNDERSTORMS OVER THE WARNING AREA WERE ENDING.  HOWEVER IT IS 
ESTIMATED THAT LOCALLY OVER 4 INCHES OF RAIN HAD FALLEN BETWEEN 
BROOMFIELD CENTER AND MILLBROOK SINCE 5 PM.  PONY CREEK FLOWS 
SOUTHEAST THROUGH THIS REGION THROUGH ROLLAND CENTER.  FLASH 
FLOODING IN THESE AREAS IS LIKELY TO BE OCCURRING AT THIS TIME.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BROOMFIELD CENTER...DEERFIELD CENTER...MILLBROOK...ROLLAND CENTER AND
TITUS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4366 8497 4358 8489 4347 8485 4347 8514
      4356 8515 4370 8514

$$

MJS

619 
WGUS73 KGRR 050235
FFSGRR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1035 PM EDT WED JUL 4 2012

MIC073-107-050250-
/O.CAN.KGRR.FF.W.0005.000000T0000Z-120705T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ISABELLA MI-MECOSTA MI-
1035 PM EDT WED JUL 4 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
MECOSTA AND SOUTHWESTERN ISABELLA COUNTIES IS CANCELLED...

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 4366 8497 4358 8489 4347 8485 4347 8514
      4356 8515 4370 8514

$$

MJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 3:24 AM EDT	Heat Advisory	GRR	Clare, Isabella, Lake, Mason, Mecosta, Newaygo and 2 more	3 days
Jul 4, 4:37 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	53 min
Jul 4, 4:55 PM EDT	Areal Flood Advisory	GRR	Isabella, Mecosta	3 hr
Jul 4, 5:16 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta	29 min
Jul 4, 5:31 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	59 min
Jul 4, 6:32 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	58 min

Nearby

Flash Flood Warnings in Michigan, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.