Alert archive / Wisconsin / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Milwaukee, WI

June 21, 2011Milwaukee County, Waukesha County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Jun 21, 2011, 7:57 PM CDT for Milwaukee County, Waukesha County, Wisconsin. It was in force for 4 hr. 17 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: Jun 21, 2011, 7:57 PM CDT (00:57 UTC)
Expired: Jun 22, 2011, 12:00 AM CDT
In force: 4 hr
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Flood severity: None

Counties Milwaukee County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 50 km from the middle of the area, began a volume at 00:59 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
Jun 21, 8:04 PM CDT	HEAVY RAIN 1	Wauwatosa, WI	FLOODING REPORTED AT HWY 100...BLUEMOUND INTERSECTION...TOTAL ESTIMATED FROM RADAR FOR ONE HOUR TIME PERIOD.
Jun 21, 8:19 PM CDT	HEAVY RAIN 1.25	West Allis, WI	TOTAL ESTIMATED FROM RADAR...3-4 INCHES REPORTED OVER ROAD AT INTERSTATE 94...HWY 45 INTERSECTION
Jun 21, 8:30 PM CDT	HEAVY RAIN 2.07	West Allis, WI	STREET FLOODING
Jun 21, 8:35 PM CDT	FLOOD	1 S Milwaukee, WI	SEWER GRATES OVERFLOWING AT INTERSECTION 43RD AND LINCOLN AVE
Jun 21, 8:35 PM CDT	FLOOD	2 Se Miller Park, WI	WATER ESTIMATED AROUND 2 FEET DEEP ON ROADS
Jun 21, 8:40 PM CDT	FLOOD	2 W Shorewood, WI	MANHOLE COVERS LIFTING OFF DUE TO FLOODING...CAPITAL DR AND PORT WASHINGTON AVE INTERSECTION
Jun 21, 8:40 PM CDT	FLOOD	Brookfield, WI	ROAD CLOSED AT LILY RD AND BURLEIGH RD INTERSECTION...MULTIPLE ROADS IN SURROUNDING AREAS REPORTING FLOODING TOO
Jun 21, 9:00 PM CDT	FLOOD	Franklin, WI	FLOODING AT HWY 100 AND HWY 36...ONE LANE BLOCKED
Jun 21, 9:00 PM CDT	HEAVY RAIN 1.4	2 Se Milwaukee Timmerma, WI	BETWEEN 720 AND 9 PM CDT
Jun 21, 9:00 PM CDT	HEAVY RAIN 1.5	1 Ene Muskego, WI	TOTAL BETWEEN 7 AND 9 PM CDT
Jun 21, 9:28 PM CDT	FLOOD	West Allis, WI	APPROX 2 FT OVER TOAD ON NATIONAL AT ROOT RIVER PARKWAY...VEHICLE STALLED IN WATER
Jun 21, 9:30 PM CDT	HEAVY RAIN 2.45	West Allis, WI	TOTAL BETWEEN 720 PM AND 930 PM
Jun 21, 10:00 PM CDT	HEAVY RAIN 3.33	Elm Grove, WI	3.33 INCHES OF RAINFALL FROM MIDNIGHT THROUGH 10 PM THIS EVENING...FROM MMSD RAIN GAUGE.
Jun 21, 10:00 PM CDT	HEAVY RAIN 3.4	1 W Milwaukee, WI	3.40 INCHES OF RAINFALL FROM MIDNIGHT THROUGH 10 PM THIS EVENING...FROM MMSD RAIN GAUGE.
Jun 21, 10:00 PM CDT	HEAVY RAIN 3.45	7 Wsw Milwaukee, WI	3.45 INCHES OF RAINFALL FROM MIDNIGHT THROUGH 10 PM THIS EVENING...FROM MMSD RAIN GAUGE.
Jun 21, 10:00 PM CDT	HEAVY RAIN 3.56	3 Nw Milwaukee, WI	3.56 INCHES OF RAIN FROM MIDNIGHT THROUGH 10 PM THIS EVENING...FROM MMSD RAIN GAUGE.
Jun 21, 11:06 PM CDT	FLOOD	Waukesha, WI	FOX RIVER OUT OF ITS BANKS AND OVER SIDEWALKS NEAR STATE BUILDING...AND ACROSS THE RIVER BY APARTMENT BUILDINGS. REPORTED FROM FOX RIVER AT BARSTOW STREET.

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, 1.0 hours before the alert went out and 170 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1109 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 96 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.

314 
WGUS53 KMKX 220057
FFWMKX
WIC079-133-220500-
/O.NEW.KMKX.FF.W.0002.110622T0057Z-110622T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
757 PM CDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WAUKESHA COUNTY IN SOUTHEAST WISCONSIN...
  MILWAUKEE COUNTY IN SOUTHEAST WISCONSIN...

* UNTIL MIDNIGHT CDT

* AT 755 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. UP
  TO 1 INCH OF RAIN HAS FALLEN IN THE PAST HOUR OVER SOUTHWEST
  MILWAUKEE AND SOUTHEAST WAUKESHA COUNTIES...WITH MORE
  THUNDERSTORMS WITH HEAVY RAIN LIFTING UP FROM THE SOUTH.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BAYSIDE...BROOKFIELD...BROWN DEER...CUDAHY...DOWNTOWN MILWAUKEE...
  DOWNTOWN WAUKESHA...ELM GROVE...FOX POINT...FRANKLIN...GLENDALE...
  GREENDALE...GREENFIELD...HALES CORNERS...MENOMONEE FALLS...
  MUSKEGO...NEW BERLIN...OAK CREEK...PEWAUKEE...SOUTH MILWAUKEE...ST.
  FRANCIS...SUSSEX...WAUWATOSA...WEST ALLIS...WEST MILWAUKEE...
  WHITEFISH BAY...BIG BEND...BUTLER...LANNON...MILWAUKEE COUNTY ZOO
  AND MILWAUKEE HOAN BRIDGE.

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.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 4284 8799 4285 8824 4319 8826 4319 8790
      4305 8787 4304 8789 4301 8789 4298 8786
      4290 8783 4288 8784 4288 8783 4286 8784
      4284 8783

$$

REM

2 follow-up statements

894 
WGUS73 KMKX 220137
FFSMKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
837 PM CDT TUE JUN 21 2011

WIC079-133-220500-
/O.CON.KMKX.FF.W.0002.000000T0000Z-110622T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILWAUKEE WI-WAUKESHA WI-
837 PM CDT TUE JUN 21 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
EASTERN WAUKESHA AND MILWAUKEE COUNTIES...

AT 831 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER 
EASTERN MILWAUKEE COUNTY. THE RAIN IS TAPERING OFF OVER EASTERN 
WAUKESHA AND WESTERN MILWAUKEE COUNTIES.

WHILE THE RAIN WILL TAPER OFF OVER THE NEXT HALF HOUR...IT WILL TAKE 
AN HOUR OR MORE FOR FLOODED AREAS TO DRAIN.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GREENFIELD...
GLENDALE...UW-MILWAUKEE CAMPUS...DOWNTOWN MILWAUKEE...WHITEFISH 
BAY...WEST ALLIS...ST. FRANCIS...RIVER HILLS...FOX POINT...BROWN 
DEER AND BAYSIDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING. MOST FLOOD RELATED DEATHS OCCUR IN 
AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED 
BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A 
FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER 
MOVE UP TO HIGHER GROUND.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
WEDNESDAY MORNING FOR SOUTHEASTERN WISCONSIN.

&&

LAT...LON 4284 8799 4285 8824 4319 8826 4319 8790
      4305 8787 4304 8789 4301 8789 4298 8786
      4290 8783 4288 8784 4288 8783 4286 8784
      4284 8783

$$

REM

929 
WGUS73 KMKX 220343
FFSMKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1043 PM CDT TUE JUN 21 2011

WIC079-133-220500-
/O.CON.KMKX.FF.W.0002.000000T0000Z-110622T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILWAUKEE WI-WAUKESHA WI-
1043 PM CDT TUE JUN 21 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
EASTERN WAUKESHA AND MILWAUKEE COUNTIES...

AT 1036 PM CDT...A TRAINED WEATHER SPOTTER REPORTED 2 FEET OF WATER 
OVER THE ROAD AT THE INTERSECTION OF NATIONAL AVENUE AND THE ROOT 
RIVER PARKWAY. MOST LOCATIONS HAVE RECEIVED BETWEEN 1.5 AND 2.7 
INCHES OF RAIN THIS EVENING.
 
THE THUNDERSTORMS THAT PRODUCED THE VERY HEAVY RAIN OVER THE WARNED 
AREA HAVE WEAKENED AND MOVED NORTH. WHILE THE RAIN IS TAPERING 
OFF...IT WILL STILL TAKE SOME TIME FOR WATER TO DRAIN OFF AREA ROADS.

LAT...LON 4284 8799 4285 8824 4319 8826 4319 8790
      4305 8787 4304 8789 4301 8789 4298 8786
      4290 8783 4288 8784 4288 8783 4286 8784
      4284 8783

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:20 PM CDT	Severe Thunderstorm Warning	MKX	Dane	16 min
Jun 21, 7:22 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	38 min
Jun 21, 7:41 PM CDT	Areal Flood Advisory	MKX	Kenosha, Milwaukee, Ozaukee, Racine, Walworth, Washington and 1 more	3 hr
Jun 21, 7:53 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Racine, Waukesha	12 min
Jun 21, 7:55 PM CDT	Special Marine Warning	MKX		95 min
Jun 21, 8:03 PM CDT	Areal Flood Advisory	MKX	Dane	2 hr
Jun 21, 8:24 PM CDT	Special Marine Warning	MKX		96 min
Jun 21, 8:27 PM CDT	Areal Flood Advisory	MKX	Columbia, Green Lake, Marquette, Sauk	4 hr
Jun 21, 8:51 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	24 min
Jun 21, 8:57 PM CDT	Special Marine Warning	MKX		75 min
Jun 22, 12:34 AM CDT	Areal Flood Advisory	MKX	Fond du Lac, Green Lake, Marquette	3 hr
Jun 22, 9:39 AM CDT	Small Craft Advisory	MKX		10 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.