Alert archive / Wisconsin / Flash Flood Warnings in 2014

Flash Flood Warning 3, NWS Green Bay, WI

August 18, 2014Portage County, Waupaca County, Wisconsin

NWS Green Bay, WI issued this flash flood warning at Aug 18, 2014, 3:27 PM CDT for Portage County, Waupaca County, Wisconsin. It was in force for 3 hr. 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
Aug 18, 2014, 3:27 PM CDT (20:27 UTC)
Expired
Aug 18, 2014, 6:30 PM CDT
In force
3 hr
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Flood severity
None

Counties Portage County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 86 km from the middle of the area, began a volume at 20:30 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
Aug 18, 4:25 PM CDTFLASH FLOODWaupaca, WIFLOODING REPORTED IN BASEMENTS AS WELL AS MINOR STREET FLOODING IN DOWNTOWN WAUPACA.

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 12:00Z, 8.5 hours before the alert went out and 87 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, Green Bay/Straub, WI at 12:00Z on 2014-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2014-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

558 
WGUS53 KGRB 182027
FFWGRB
WIC097-135-182330-
/O.NEW.KGRB.FF.W.0003.140818T2027Z-140818T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
327 PM CDT MON AUG 18 2014

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN PORTAGE COUNTY IN CENTRAL WISCONSIN...
  WAUPACA COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 630 PM CDT

* AT 324 PM CDT...SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL 
  HAD PRODUCED UP TO 2 INCHES OF RAIN...WITH ANOTHER INCH OR TWO 
  YET TO COME. REPORTS OF MINOR STREET FLOODING HAVE BEEN RECEIVED   
  FROM THE CITY OF WAUPACA
 
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WAUPACA...AMHERST...FREMONT AND HARTMAN CREEK STATE PARK.


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.

&&

LAT...LON 4426 8954 4460 8952 4459 8880 4424 8881
      4424 8888

$$

RDM
1 follow-up statement
867 
WGUS73 KGRB 182111
FFSGRB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
411 PM CDT MON AUG 18 2014

WIC097-135-182330-
/O.CON.KGRB.FF.W.0003.000000T0000Z-140818T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAUPACA WI-PORTAGE WI-
411 PM CDT MON AUG 18 2014

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN PORTAGE AND
SOUTHERN WAUPACA COUNTIES UNTIL 630 PM CDT...

AT 410 PM CDT...WEATHER SPOTTERS REPORTED THUNDERSTORMS WITH VERY 
HEAVY RAINFALL ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN 
HAS BEEN REPORTED ACROSS PART OF THE WARNING AREA. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT MAY EXPERIENCE FLASH FLOODING INCLUDE...
WAUPACA...FREMONT AND HARTMAN CREEK STATE PARK.

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.

&&

LAT...LON 4426 8954 4444 8951 4445 8881 4424 8881
      4424 8894

$$

RDM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 3:08 PM CDTAreal Flood AdvisoryGRBBrown, Outagamie, Portage, Shawano, Waupaca, Wood3 hr
Aug 18, 3:53 PM CDTSevere Thunderstorm WarningGRBOutagamie, Waupaca19 min
Aug 18, 4:30 PM CDTSevere Thunderstorm WarningGRBOutagamie, Winnebago30 min
Aug 18, 5:27 PM CDTSevere Thunderstorm WarningGRBPortage, Waupaca, Waushara, Wood48 min
Aug 18, 5:30 PM CDTFlash Flood WarningGRBPortage, Waupaca, Waushara, Wood3 hr
Aug 18, 5:55 PM CDTSpecial Marine WarningGRB95 min
Aug 18, 6:21 PM CDTAreal Flood AdvisoryGRBBrown, Calumet, Manitowoc, Outagamie, Winnebago3 hr

Nearby

Flash Flood Warnings in Wisconsin, 2014Every flash flood warning in 2014

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.