Alert archive / Wisconsin / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Green Bay, WI

July 19, 2011Marathon County, Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Jul 19, 2011, 8:41 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 3 hr. 11 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 19, 2011, 8:41 PM CDT (01:41 UTC)
Expired: Jul 20, 2011, 12:00 AM CDT
In force: 3 hr
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Flood severity: None

Counties Marathon County, WI, Portage County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 145 km from the middle of the area, began a volume at 01:44 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 19, 8:47 PM CDT	FLASH FLOOD	5 N Colby, WI	8 TO 10 INCHES OF WATER FLOWING OVER HIGHWAY 13.
Jul 19, 8:57 PM CDT	HEAVY RAIN 1.44	Colby, WI
Jul 19, 9:03 PM CDT	HEAVY RAIN 3.5	Abbotsford, WI
Jul 19, 9:30 PM CDT	FLASH FLOOD	Marshfield, WI	REPORT OF STREET FLOODING
Jul 19, 9:44 PM CDT	FLASH FLOOD	4 N Marshfield, WI	4 INCHES OF WATER FLOWING OVER COUNTY E AND ELM STREET
Jul 19, 10:14 PM CDT	FLASH FLOOD	Marshfield, WI	4 INCHES OF WATER FLOWING OVER 200 BLOCK OF MCMILLEN
Jul 19, 10:18 PM CDT	FLASH FLOOD	Marshfield, WI	6 INCHES OF WATER FLOWING OVER 200 BLOCK OF MCMILLEN
Jul 19, 10:20 PM CDT	FLASH FLOOD	Unity, WI	RISING WATER THREATENING A HOME.
Jul 19, 10:45 PM CDT	FLASH FLOOD	Stevens Point, WI	NUMEROUS STORM REPORTS INCLUDING FLOODING AT THE STEVENS POINT COURTHOUSE AND HOSPITAL. PATIENTS HAD TO BE MOVED TO HIGHER GROUND. DOWNED TREES...ROOF...AND CAR DAMAGE ALSO REPORTED. RELAYED BY WSAW-TV.
Jul 19, 11:00 PM CDT	HEAVY RAIN 1.93	Plover, WI	SINCE 1010 PM.
Jul 20, 12:00 AM CDT	HEAVY RAIN 2.06	Plover, WI	TOTAL RAINFALL SINCE 1010 PM. 51 MPH WIND GUST ALSO REPORTED AT 1010 PM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.7 hours before the alert went out and 148 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: 1847 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

968 
WGUS53 KGRB 200141
FFWGRB
WIC073-097-141-200500-
/O.NEW.KGRB.FF.W.0002.110720T0141Z-110720T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
841 PM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MARATHON COUNTY IN CENTRAL WISCONSIN...
  PORTAGE COUNTY IN CENTRAL WISCONSIN...
  WOOD COUNTY IN CENTRAL WISCONSIN...

* UNTIL MIDNIGHT CDT

* AT 836 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL WILL BE MOVING 
  ACROSS MUCH OF CENTRAL WISCONSIN DURING THE EVENING HOURS. RADAR
  RAINFALL ESTIMATES OF UP TO 3 INCHES OF RAIN IS LIKELY THIS 
  EVENING OVER MUCH OF CENTRAL WISCONSIN WITH LOCALLY HIGHER
  AMOUNTS POSSIBLE. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  STEVENS POINT...WAUSAU...WISCONSIN RAPIDS...ABBOTSFORD...
  BABCOCK...BEVENT...MARSHFIELD...MOSINEE...PITTSVILLE...RIB
  MOUNTAIN...SPENCER...AND WHITING. THE MARSHFIELD VICINITY SHOULD
  BE EXPERIENCING THE FLOODING AFFECTS BY 930 PM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL 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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREEN
BAY.

&&

LAT...LON 4504 9032 4504 9020 4513 9019 4512 8924
      4425 8922 4424 8961 4425 9032

$$

TDH

2 follow-up statements

202 
WGUS73 KGRB 200217
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
917 PM CDT TUE JUL 19 2011

WIC073-097-141-200500-
/O.CON.KGRB.FF.W.0002.000000T0000Z-110720T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARATHON WI-PORTAGE WI-WOOD WI-
917 PM CDT TUE JUL 19 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WOOD...PORTAGE AND
MARATHON COUNTIES UNTIL MIDNIGHT CDT...

AT 910 PM CDT...WEATHER OBSERVERS AND LAW ENFORCEMENT OFFICIALS 
REPORTED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS WESTERN 
MARATHON COUNTY. AROUND 3 INCHES OF RAIN WAS OBSERVED TO HAVE FALLEN 
IN ABOUT AN HOUR IN THE ABBOTSFORD AREA SO FAR THIS EVENING.  THERE 
HAVE BEEN REPORTS OF WATER COVERING PARTS HIGHWAY 13 IN WESTERN 
MARATHON COUNTY. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
STEVENS POINT...WAUSAU...WISCONSIN RAPIDS...ABBOTSFORD...AMHERST...
BABCOCK...BEVENT...MARSHFIELD...MOSINEE...PITTSVILLE...RIB 
MOUNTAIN...SPENCER...AND WHITING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE LIKELY OVER WESTERN 
MARATHON COUNTY BY 1030 PM. THIS BAND OF HEAVY RAIN WILL WORK INTO 
THE MARSHFIELD AREA FOR THE REST OF THE EVENING...THE MARSHFIELD 
VICINITY SHOULD BE PREPARED FOR FLASH FLOODING. 

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE MINOR 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.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GREEN BAY.

&&

LAT...LON 4504 9032 4504 9020 4513 9019 4512 8924
      4425 8922 4424 8961 4425 9032

$$

TDH

960 
WGUS73 KGRB 200428
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1128 PM CDT TUE JUL 19 2011

WIC073-097-141-200500-
/O.CON.KGRB.FF.W.0002.000000T0000Z-110720T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARATHON WI-PORTAGE WI-WOOD WI-
1128 PM CDT TUE JUL 19 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WOOD...PORTAGE AND
MARATHON COUNTIES UNTIL MIDNIGHT CDT...

AT 1126 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
THUNDERSTORMS WITH VERY HEAVY RAINFALL WHICH MOVED OVER THE 
WARNED AREA EARLIER THIS EVENING CONTINUES TO IMPACT THE AREA
WITH ROAD CLOSURES. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CONTINUE TO CAUSE FLASH 
FLOODING TO OCCUR. SOME LOCATIONS THAT ARE EXPERIENCING FLASH 
FLOODING INCLUDE...STEVENS POINT...ABBOTSFORD...MARSHFIELD...AND
SPENCER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE MINOR 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.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GREEN BAY.

&&

LAT...LON 4504 9032 4504 9020 4513 9019 4512 8924
      4425 8922 4424 8961 4425 9032

$$

ECKBERG

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 7:29 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	61 min
Jul 19, 8:01 PM CDT	Severe Thunderstorm Warning	GRB	Wood	59 min
Jul 19, 8:30 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	33 min
Jul 19, 9:46 PM CDT	Severe Thunderstorm Warning	GRB	Portage	59 min
Jul 19, 10:01 PM CDT	Severe Thunderstorm Warning	GRB	Wood	31 min
Jul 19, 10:20 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	40 min
Jul 19, 10:21 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	39 min
Jul 19, 10:49 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	41 min
Jul 19, 10:56 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	34 min
Jul 19, 11:13 PM CDT	Areal Flood Advisory	GRB	Brown, Calumet, Outagamie, Waupaca, Winnebago	87 min
Jul 19, 11:58 PM CDT	Flash Flood Warning	GRB	Marathon, Portage, Wood	116 min
Jul 20, 12:13 AM CDT	Special Marine Warning	GRB		92 min
Jul 20, 4:10 AM CDT	Small Craft Advisory	GRB		23 hr

Nearby

Flash Flood Warnings in Wisconsin, 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.