Alert archive / Wisconsin / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Green Bay, WI

July 2, 2012Forest County, Langlade County, Oconto County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Jul 2, 2012, 8:24 PM CDT for Forest County, Langlade County, Oconto County, Wisconsin. It was in force for 8 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 2, 2012, 8:24 PM CDT (01:24 UTC)
Expired: Jul 3, 2012, 4:30 AM CDT
In force: 8 hr
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Flood severity: None

Counties Forest County, WI, Langlade County, WI, Oconto County, WI

The radar

The Green Bay radar (KGRB), 126 km from the middle of the area, began a volume at 01:26 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.4 hours before the alert went out and 129 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: 3426 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

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

199 
WGUS53 KGRB 030124
FFWGRB
WIC041-067-083-030930-
/O.NEW.KGRB.FF.W.0005.120703T0124Z-120703T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
824 PM CDT MON JUL 2 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN LANGLADE COUNTY IN NORTH CENTRAL WISCONSIN...
  NORTHERN OCONTO COUNTY IN NORTHEAST WISCONSIN...
  SOUTHERN FOREST COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 430 AM CDT TUESDAY

* AT 819 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE 
  WARNED AREA. RADAR ESTIMATES 3 TO 4 INCHES OF RAIN HAS FALLEN 
  FROM 6 PM TO 8 PM. SINCE THE STORMS ARE MOVING VERY SLOW 
  ADDITIONAL HEAVY RAINFALL IS LIKELY TONIGHT. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CRANDON...CARTER AND PEARSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 3 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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.

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 4574 8868 4572 8867 4572 8843 4538 8843
      4538 8840 4527 8840 4528 8904 4573 8904
      4574 8870

$$

TH

4 follow-up statements

602 
WGUS73 KGRB 030254
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
954 PM CDT MON JUL 2 2012

WIC041-067-083-030930-
/O.CON.KGRB.FF.W.0005.000000T0000Z-120703T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FOREST WI-LANGLADE WI-OCONTO WI-
954 PM CDT MON JUL 2 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN OCONTO...
NORTHEASTERN LANGLADE AND SOUTHERN FOREST COUNTIES UNTIL 430 AM CDT
TUESDAY...

AT 947 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR 
ESTIMATES OF 5 TO 8 INCHES OF RAIN HAS FALLEN FROM 6 PM TO 10 PM. 
ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED DURING THE 
OVERNIGHT HOURS WHICH WOULD ADD TO THE POTENTIAL OF FLOODING.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CRANDON...CARTER AND PEARSON.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA OVERNIGHT. THIS WOULD BRING TOTAL RAINFALL AMOUNTS 
BETWEEN 6 AND 10 INCHES BY DAYBREAK WITH ISOLATED AMOUNTS 
APPROACHING 12 INCHES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT 
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT 
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 4574 8868 4572 8867 4572 8843 4538 8843
      4538 8840 4527 8840 4528 8904 4573 8904
      4574 8870

$$

KALLAS

284 
WGUS73 KGRB 030456
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1156 PM CDT MON JUL 2 2012

WIC041-067-083-030930-
/O.CON.KGRB.FF.W.0005.000000T0000Z-120703T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FOREST WI-LANGLADE WI-OCONTO WI-
1156 PM CDT MON JUL 2 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN OCONTO...
NORTHEASTERN LANGLADE AND SOUTHERN FOREST COUNTIES UNTIL 430 AM
CDT...

AT 1150 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
ADDITIONAL THUNDERSTORMS WITH VERY HEAVY RAINFALL HEADED TOWARD THE 
WARNED AREA. RADAR ESTIMATES OF 5 TO 9 INCHES OF RAIN HAS FALLEN 
FROM 6 PM TO MIDNIGHT. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE 
EXPECTED DURING THE OVERNIGHT HOURS WHICH WOULD ADD TO THE POTENTIAL 
OF FLOODING.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CRANDON...CARTER AND PEARSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA. THIS WOULD BRING TOTAL RAINFALL AMOUNTS TO BETWEEN 6 
AND 10 INCHES BY DAYBREAK WITH ISOLATED AMOUNTS APPROACHING 12 
INCHES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 4574 8868 4572 8867 4572 8843 4538 8843
      4538 8840 4527 8840 4528 8904 4573 8904
      4574 8870

$$

KALLAS

558 
WGUS73 KGRB 030656
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
156 AM CDT TUE JUL 3 2012

WIC041-067-083-030930-
/O.CON.KGRB.FF.W.0005.000000T0000Z-120703T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FOREST WI-LANGLADE WI-OCONTO WI-
156 AM CDT TUE JUL 3 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN OCONTO...
NORTHEASTERN LANGLADE AND SOUTHERN FOREST COUNTIES UNTIL 430 AM
CDT...

AT 151 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR 
ESTIMATES OF 5 TO 10 INCHES OF RAIN HAS FALLEN FROM 600 PM TO 200 
AM. ADDITIONAL SHOWERS AND THUNDERSTORMS DURING THE EARLY MORNING 
HOURS WOULD ADD TO THE POTENTIAL OF FLOODING.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CRANDON...CARTER AND PEARSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF AROUND AN INCH ARE POSSIBLE IN THE 
WARNED AREA. THIS WOULD BRING TOTAL RAINFALL AMOUNTS TO BETWEEN 6 
AND 10 INCHES BY DAYBREAK WITH ISOLATED AMOUNTS APPROACHING 12 
INCHES. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 4574 8868 4572 8867 4572 8843 4538 8843
      4538 8840 4527 8840 4528 8904 4573 8904
      4574 8870

$$

KALLAS

563 
WGUS73 KGRB 030925
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
425 AM CDT TUE JUL 3 2012

WIC041-067-083-030936-
/O.EXP.KGRB.FF.W.0005.000000T0000Z-120703T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FOREST WI-LANGLADE WI-OCONTO WI-
425 AM CDT TUE JUL 3 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN OCONTO...
NORTHEASTERN LANGLADE AND SOUTHERN FOREST COUNTIES WILL BE ALLOWED TO
EXPIRE AT 430 AM CDT...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. 
OCCASIONAL SHOWERS AND ISOLATED THUNDERSTORMS ARE STILL EXPECTED 
DURING THE EARLY MORNING HOURS...HOWEVER RAINFALL AMOUNTS WILL BE 
LIGHT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR 
LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4574 8868 4572 8867 4572 8843 4538 8843
      4538 8840 4527 8840 4528 8904 4573 8904
      4574 8870

$$

KALLAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 7:01 PM CDT	Flash Flood Warning	GRB	Winnebago	91 min
Jul 2, 7:18 PM CDT	Severe Thunderstorm Warning	GRB	Winnebago	27 min
Jul 2, 7:33 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Langlade, Marinette, Oconto	57 min
Jul 2, 11:09 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	66 min
Jul 3, 12:02 AM CDT	Severe Thunderstorm Warning	GRB	Forest	31 min
Jul 3, 12:47 AM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Langlade, Marinette, Oconto	58 min

Nearby

Flash Flood Warnings in Wisconsin, 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.