Alert archive / Wisconsin / Flash Flood Warnings in 2011

Flash Flood Warning 3, 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, 11:58 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 116 min. 1 report 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, 11:58 PM CDT (04:58 UTC)
Expired: Jul 20, 2011, 1:54 AM CDT
In force: 116 min
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 Green Bay radar (KGRB), 132 km from the middle of the area, began a volume at 05:00 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 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, 5.0 hours before the alert went out and 133 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.

894 
WGUS53 KGRB 200458
FFWGRB
WIC073-097-141-200800-
/O.NEW.KGRB.FF.W.0003.110720T0458Z-110720T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
1158 PM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

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

* UNTIL 300 AM CDT

* AT 1154 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUE TO REPORT 
  FLASH FLOODING DUE TO HEAVY RAINS TUESDAY EVENING.  OFFICIALS CONTINUE
  TO REPORT FLOODING IN THE CITIES OF MARSHFIELD AND STEVENS POINT. 
  LOOK FOR FLOODING EFFECTS TO DIMINISH THROUGH EARLY WEDNESDAY MORNING
  AND FLOODING EFFECTS TO TRANSITION TO RIVER RISES BY MORNING. 

* SOME LOCATIONS THAT CONTINUE TO EXPERIENCE FLOODING INCLUDE...STEVENS
  POINT AND MARSHFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4493 9031 4470 8923 4425 8922 4424 8923
      4425 9032

$$

ECKBERG

1 follow-up statement

132 
WGUS73 KGRB 200654
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
154 AM CDT WED JUL 20 2011

WIC073-097-141-200707-
/O.CAN.KGRB.FF.W.0003.000000T0000Z-110720T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARATHON WI-PORTAGE WI-WOOD WI-
154 AM CDT WED JUL 20 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WOOD...PORTAGE AND
SOUTHERN MARATHON COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA...ENDING
THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT 
TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4493 9031 4470 8923 4425 8922 4424 8923
      4425 9032

$$

AK

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, 8:41 PM CDT	Flash Flood Warning	GRB	Marathon, Portage, Wood	3 hr
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 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.