Alert archive / Wisconsin / Flash Flood Watches in 2018

Flash Flood Watch 3, NWS Milwaukee, WI

August 19, 201815 counties in Wisconsin

NWS Milwaukee, WI issued this flash flood watch at Aug 19, 2018, 1:53 PM CDT for 15 counties in Wisconsin. It took effect at Aug 20, 2018, 5:00 PM CDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Aug 19, 2018, 1:53 PM CDT (18:53 UTC)
In effect from
Aug 20, 2018, 5:00 PM CDT
Expired
Aug 21, 2018, 6:41 AM CDT
In force
14 hr
Issued by
NWS Milwaukee, WI
Flood severity
None

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 38 km from the middle of the area, began a volume at 18:56 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 12:00Z, 6.9 hours before the alert went out and 159 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 2018-08-19Temperature 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°0°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 2018-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 square meters per square second.19395878Sfc1 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
803 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

823 
WGUS63 KMKX 191853
FFAMKX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Milwaukee/Sullivan WI
153 PM CDT Sun Aug 19 2018

...HEAVY RAINFALL AND POSSIBLE FLOODING BEGINNING LATE MONDAY...

.Periods of moderate to heavy rainfall is forecast over southern
Wisconsin for Monday afternoon into Tuesday morning. Several 
inches of rain may fall over sections of east central and 
southeast Wisconsin during this time. Flash flooding may occur 
especially in urban areas or areas that received several inches of
rain last week.

WIZ051-052-058>060-064>066-200300-
/O.NEW.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
153 PM CDT Sun Aug 19 2018

...FLASH FLOOD WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH
TUESDAY MORNING...

The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Watch for portions of east central Wisconsin and 
  southeast Wisconsin, including the following areas, in east 
  central Wisconsin, Fond Du Lac and Sheboygan. In southeast 
  Wisconsin, Dodge, Jefferson, Milwaukee, Ozaukee, Washington, 
  and Waukesha. 

* From Monday afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late Monday afternoon
  into Tuesday morning. 1.5 to 2.0 inches expected but locally 2
  to 4 inches or more is possible over southeast and east central
  Wisconsin. 

* Flash flooding in urban areas will be possible if 2 to 4 inches
  of rain or more falls in a relatively short period of time.
  Flash flooding will be possible in rural areas that have already
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
8 follow-up statements
786 
WGUS63 KMKX 200203
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
903 PM CDT Sun Aug 19 2018

...HEAVY RAINFALL AND POSSIBLE FLOODING BEGINNING LATE MONDAY...

.Periods of moderate to heavy rainfall are forecast over southern
Wisconsin for Monday afternoon into Tuesday morning. Several 
inches of rain may fall over sections of east central and 
southeast Wisconsin during this time. Flash flooding may occur 
especially in urban areas or areas that received several inches of
rain last week.

WIZ051-052-058>060-064>066-201015-
/O.CON.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
903 PM CDT Sun Aug 19 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
THROUGH TUESDAY MORNING...

The Flash Flood Watch continues for

* Portions of east central Wisconsin and southeast Wisconsin, 
  including the following areas, in east central Wisconsin, Fond 
  Du Lac and Sheboygan. In southeast Wisconsin, Dodge, 
  Jefferson, Milwaukee, Ozaukee, Washington, and Waukesha. 

* From Monday afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late Monday 
  afternoon into Tuesday morning. 1.5 to 2.0 inches expected but 
  locally 2 to 4 inches or more is possible over southeast and 
  east central Wisconsin. 

* Flash flooding in urban areas will be possible if 2 to 4 
  inches of rain or more falls in a relatively short period of 
  time. Flash flooding will be possible in rural areas that have 
  already received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
774 
WGUS63 KMKX 200846
FFAMKX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Milwaukee/Sullivan WI
346 AM CDT Mon Aug 20 2018

...HEAVY RAINFALL AND POSSIBLE FLOODING BEGINNING LATE MONDAY...

.Periods of moderate to heavy rainfall are forecast over southern
Wisconsin for this afternoon into Tuesday morning. Several inches
of rain may fall over southern Wisconsin during this time. Flash 
flooding may occur especially in urban areas or areas that 
received several inches of rain last week.

WIZ056-057-062-063-067>069-201700-
/O.EXA.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sauk-Columbia-Iowa-Dane-Lafayette-Green-Rock-
Including the cities of Baraboo, Reedsburg, Prairie Du Sac, 
Sauk City, Portage, Columbus, Lake Wisconsin, Lodi, Dodgeville, 
Mineral Point, Barneveld, Madison, Darlington, Shullsburg, 
Benton, Belmont, Argyle, Blanchardville, Monroe, Brodhead, 
Janesville, and Beloit
346 AM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH
TUESDAY MORNING...

The National Weather Service in Milwaukee/Sullivan has expanded
the

* Flash Flood Watch to include a portion of south central 
  Wisconsin, including the following areas, Columbia, Dane, 
  Green, Iowa, Lafayette, Rock, and Sauk. 

* From this afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late Monday afternoon
  into Tuesday morning. 1 to 3 inches of rainfall is expected but
  localized amounts of 4 inches or more are possible over southern
  Wisconsin. 

* Flash flooding in urban areas will be possible if 2 to 4 inches
  of rain or more falls in a short period of time. Flash flooding
  will be possible in rural areas that have already received 
  several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

WIZ051-052-058>060-064>066-201700-
/O.CON.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
346 AM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS AFTERNOON
THROUGH TUESDAY MORNING...

The Flash Flood Watch continues for

* Portions of east central Wisconsin and southeast Wisconsin, 
  including the following areas, in east central Wisconsin, Fond 
  Du Lac and Sheboygan. In southeast Wisconsin, Dodge, 
  Jefferson, Milwaukee, Ozaukee, Washington, and Waukesha. 

* From this afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late Monday afternoon
  into Tuesday morning. 1 to 3 inches of rainfall is expected but
  localized amounts of 4 inches or more are possible over southern
  Wisconsin. 

* Flash flooding in urban areas will be possible if 2 to 4 inches
  of rain or more falls in a short period of time. Flash flooding
  will be possible in rural areas that have already received
  several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
077 
WGUS63 KMKX 201646
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
1146 AM CDT Mon Aug 20 2018

...HEAVY RAINFALL AND POSSIBLE FLOODING BEGINNING LATE MONDAY...

.Periods of moderate to heavy rainfall are forecast over southern
Wisconsin late this afternoon into Tuesday morning. Several 
inches of rain may fall over southern Wisconsin during this time. 
Flash flooding may occur especially in urban areas or areas that 
received several inches of rain last week.

WIZ051-052-056>060-062>069-210100-
/O.CON.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-Washington-Ozaukee-Iowa-
Dane-Jefferson-Waukesha-Milwaukee-Lafayette-Green-Rock-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Baraboo, Reedsburg, Prairie Du Sac, 
Sauk City, Portage, Columbus, Lake Wisconsin, Lodi, Beaver Dam, 
Waupun, Mayville, West Bend, Germantown, Hartford, Mequon, 
Cedarburg, Grafton, Dodgeville, Mineral Point, Barneveld, 
Madison, Watertown, Fort Atkinson, Jefferson, Waukesha, 
Brookfield, New Berlin, Menomonee Falls, Muskego, West Allis, 
Wauwatosa, Greenfield, Franklin, Oak Creek, South Milwaukee, 
Cudahy, Darlington, Shullsburg, Benton, Belmont, Argyle, 
Blanchardville, Monroe, Brodhead, Janesville, and Beloit
1146 AM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 PM CDT THIS
AFTERNOON THROUGH TUESDAY MORNING...

The Flash Flood Watch continues for

* Portions of east central Wisconsin, south central Wisconsin, 
  and southeast Wisconsin, including the following areas, in 
  east central Wisconsin, Fond Du Lac and Sheboygan. In south 
  central Wisconsin, Columbia, Dane, Green, Iowa, Lafayette, 
  Rock, and Sauk. In southeast Wisconsin, Dodge, Jefferson, 
  Milwaukee, Ozaukee, Washington, and Waukesha. 

* From 5 PM CDT this afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late this afternoon 
  into Tuesday morning. 1 to 3 inches of rainfall is expected, but
  localized amounts of 4 inches or more are possible over 
  southern Wisconsin. 

* Flash flooding in urban areas will be possible if 2 to 4 
  inches of rain or more falls in a short period of time. Flash 
  flooding will be possible in rural areas that have already 
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
Wood
267 
WGUS63 KMKX 201833
FFAMKX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Milwaukee/Sullivan WI
133 PM CDT Mon Aug 20 2018

...HEAVY RAINFALL AND POSSIBLE FLOODING THIS AFTERNOON INTO 
TUESDAY MORNING...

.Showers and scattered thunderstorms will move north out of 
northern Illinois and into southern Wisconsin this afternoon. For
this evening, periods of showers and thunderstorms with heavy
rainfall are expected, and may last into Tuesday morning over
southeast and east central Wisconsin. Several inches of rain may
fall over southern Wisconsin during this time with the heaviest
totals in eastern Wisconsin. Flash flooding may occur especially 
in urban areas or areas that received several inches of rain last 
week.

WIZ056-057-062-063-067>069-210245-
/O.EXT.KMKX.FF.A.0003.180820T2200Z-180821T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sauk-Columbia-Iowa-Dane-Lafayette-Green-Rock-
Including the cities of Baraboo, Reedsburg, Prairie Du Sac, 
Sauk City, Portage, Columbus, Lake Wisconsin, Lodi, Dodgeville, 
Mineral Point, Barneveld, Madison, Darlington, Shullsburg, 
Benton, Belmont, Argyle, Blanchardville, Monroe, Brodhead, 
Janesville, and Beloit
133 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH NOW IN EFFECT FROM 5 PM CDT THIS AFTERNOON
THROUGH LATE TONIGHT...

The Flash Flood Watch is now in effect for

* A portion of south central Wisconsin, including the following 
  areas, Columbia, Dane, Green, Iowa, Lafayette, Rock, and Sauk. 

* From 5 PM CDT this afternoon through late tonight

* Periods of moderate to heavy rainfall this afternoon into late
  night. 1 to 3 inches of rainfall is expected. 
 
* Flash flooding in urban areas will be possible if 1 to 3 inches
  of rain or more falls in a short period of time. Flash flooding
  will be possible in rural areas that have already received 
  several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

WIZ051-052-058>060-064>066-210245-
/O.CON.KMKX.FF.A.0003.180820T2200Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
133 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 PM CDT THIS
AFTERNOON THROUGH TUESDAY MORNING...

The Flash Flood Watch continues for

* Portions of east central Wisconsin and southeast Wisconsin, 
  including the following areas, in east central Wisconsin, Fond 
  Du Lac and Sheboygan. In southeast Wisconsin, Dodge, 
  Jefferson, Milwaukee, Ozaukee, Washington, and Waukesha. 

* From 5 PM CDT this afternoon through Tuesday morning

* Periods of moderate to heavy rainfall from late this afternoon
  into Tuesday morning. 1 to 3 inches of rainfall is expected, but
  localized amounts of 4 inches or more are possible over
  southeast and east central Wisconsin. 

* Flash flooding in urban areas will be possible if 1 to 3 inches
  of rain or more falls in a short period of time. Flash flooding
  will be possible in rural areas that have already received 
  several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
322 
WGUS63 KMKX 202346
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
646 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT TONIGHT INTO TUESDAY...

.Showers and thunderstorms will continue to deposit heavy rainfall
over parts of southern Wisconsin tonight. Parts of west Madison
has received between 2 and 5 inches of rainfall so far. A Flash
Flood Warning remains in effect this evening for this area. 

Elsewhere, a Flash Flood Watch remains in effect for tonight. 
Occasional showers and thunderstorms will produce heavy rainfall
tonight, possibly lasting into into Tuesday morning over 
southeast and east central Wisconsin. Several inches of additional rain
may fall over southern Wisconsin during this time. Flash flooding
may occur especially in urban areas or areas that received 
several inches of rain last week.

WIZ051-052-058>060-064>066-210800-
/O.CON.KMKX.FF.A.0003.000000T0000Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
646 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY MORNING...

The Flash Flood Watch continues for

* Portions of east central Wisconsin and southeast Wisconsin, 
  including the following areas, in east central Wisconsin, Fond 
  Du Lac and Sheboygan. In southeast Wisconsin, Dodge, 
  Jefferson, Milwaukee, Ozaukee, Washington, and Waukesha. 

* Through Tuesday morning

* Periods of moderate to heavy rainfall tonight into Tuesday 
  morning. 1 to 3 inches of rainfall is expected, but localized 
  amounts of 4 inches or more are possible over southeast and east
  central Wisconsin. 

* Flash flooding in urban areas will be possible if 1 to 3 
  inches of rain or more falls in a short period of time. Flash 
  flooding will be possible in rural areas that have already 
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

WIZ056-057-062-063-067>069-210800-
/O.CON.KMKX.FF.A.0003.000000T0000Z-180821T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sauk-Columbia-Iowa-Dane-Lafayette-Green-Rock-
Including the cities of Baraboo, Reedsburg, Prairie Du Sac, 
Sauk City, Portage, Columbus, Lake Wisconsin, Lodi, Dodgeville, 
Mineral Point, Barneveld, Madison, Darlington, Shullsburg, 
Benton, Belmont, Argyle, Blanchardville, Monroe, Brodhead, 
Janesville, and Beloit
646 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY...

The Flash Flood Watch continues for

* A portion of south central Wisconsin, including the following 
  areas, Columbia, Dane, Green, Iowa, Lafayette, Rock, and Sauk. 

* Until 4 AM CDT Tuesday

* Periods of moderate to heavy rainfall tonight. 2 to 4 inches of
  rainfall is expected with locally higher amounts. 

* Flash flooding in urban areas will be possible if 1 to 3 
  inches of rain or more falls in a short period of time. Flash 
  flooding will be possible in rural areas that have already 
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
MBK
770 
WGUS63 KMKX 210240
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
940 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT TONIGHT INTO TUESDAY...

.Showers and thunderstorms will continue to deposit heavy
rainfall over parts of southern Wisconsin through late tonight. 
Parts of western Dane County including parts of Middleton and 
Cross Plains have received between 4 and 9 inches of heavy
rainfall since the late afternoon. 

A Flash Flood Watch remains in effect tonight. Periods of showers
and thunderstorms will continue to produce heavy rainfall 
tonight, possibly lasting into Tuesday morning over southeast and
east central Wisconsin. Several inches of additional rain may 
fall over southern Wisconsin during this time. Flash flooding may 
occur especially in urban areas or areas that received several 
inches of rain last week.

WIZ051-052-058>060-064>066-211045-
/O.CON.KMKX.FF.A.0003.000000T0000Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Ozaukee-Jefferson-Waukesha-
Milwaukee-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Mequon, Cedarburg, Grafton, Watertown, 
Fort Atkinson, Jefferson, Waukesha, Brookfield, New Berlin, 
Menomonee Falls, Muskego, West Allis, Wauwatosa, Greenfield, 
Franklin, Oak Creek, South Milwaukee, and Cudahy
940 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 AM CDT TUESDAY...

The Flash Flood Watch continues for

* Portions of east central Wisconsin and southeast Wisconsin, 
  including the following areas, in east central Wisconsin, Fond 
  Du Lac and Sheboygan. In southeast Wisconsin, Dodge, 
  Jefferson, Milwaukee, Ozaukee, Washington, and Waukesha. 

* Until 9 AM CDT Tuesday

* Periods of moderate to heavy rainfall tonight into Tuesday
  morning. 1 to 3 inches of rainfall is expected, but localized
  amounts of 4 inches or more are possible over southeast and 
  east central Wisconsin. 

* Flash flooding in urban areas will be possible if 1 to 3 
  inches of rain or more falls in a short period of time. Flash 
  flooding will be possible in rural areas that have already 
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

WIZ056-057-062-063-067>069-210900-
/O.CON.KMKX.FF.A.0003.000000T0000Z-180821T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sauk-Columbia-Iowa-Dane-Lafayette-Green-Rock-
Including the cities of Baraboo, Reedsburg, Prairie Du Sac, 
Sauk City, Portage, Columbus, Lake Wisconsin, Lodi, Dodgeville, 
Mineral Point, Barneveld, Madison, Darlington, Shullsburg, 
Benton, Belmont, Argyle, Blanchardville, Monroe, Brodhead, 
Janesville, and Beloit
940 PM CDT Mon Aug 20 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY...

The Flash Flood Watch continues for

* A portion of south central Wisconsin, including the following 
  areas, Columbia, Dane, Green, Iowa, Lafayette, Rock, and Sauk. 

* Until 4 AM CDT Tuesday

* Periods of moderate to heavy rainfall tonight. 2 to 4 inches of
  rainfall is expected with locally higher amounts of 4 to 9
  inches, especially in western Dane County.  

* Flash flooding in urban areas will be possible if 1 to 3 
  inches of rain or more falls in a short period of time. Flash 
  flooding will be possible in rural areas that have already 
  received several inches of rain last week. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
MBK
159 
WGUS63 KMKX 210940
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
440 AM CDT Tue Aug 21 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FOR MILWAUKEE AND OZAUKEE
COUNTIES...

.The threat for flash flooding is diminishing across parts of
southeast Wisconsin. The flash flood warning will continue for 
Ozaukee and Milwaukee counties due to some persistent rain 
lingering in that area. That rain is just off shore over Lake 
Michigan, but could back up to the west into those counties for a 
few hours.

Look for the rain to then gradually diminish from west to east 
across southern Wisconsin this morning. 

WIZ051-052-058-059-064-065-211045-
/O.CAN.KMKX.FF.A.0003.000000T0000Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond Du Lac-Sheboygan-Dodge-Washington-Jefferson-Waukesha-
Including the cities of Fond Du Lac, Plymouth, Sheboygan Falls, 
Howards Grove, Oostburg, Beaver Dam, Waupun, Mayville, West Bend,
Germantown, Hartford, Watertown, Fort Atkinson, Jefferson, 
Waukesha, Brookfield, New Berlin, Menomonee Falls, and Muskego
440 AM CDT Tue Aug 21 2018

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of east central Wisconsin and
southeast Wisconsin has been cancelled. 

$$

WIZ060-066-211400-
/O.CON.KMKX.FF.A.0003.000000T0000Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ozaukee-Milwaukee-
Including the cities of Mequon, Cedarburg, Grafton, West Allis, 
Wauwatosa, Greenfield, Franklin, Oak Creek, South Milwaukee, 
and Cudahy
440 AM CDT Tue Aug 21 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 AM CDT THIS
MORNING...

The Flash Flood Watch continues for

* A portion of southeast Wisconsin, including the following 
  areas, Milwaukee and Ozaukee. 

* Until 9 AM CDT this morning

* Occasional moderate to heavy rainfall is possible into the mid
  morning hours. Very localized 1 inch amounts are possible. This
  would occur on top of 1 to 2 inches of rain that fell yesterday
  and overnight. 

* Flash flooding in urban areas will be possible if an addition 1
  inch of rain or more falls in a short period of time. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
229 
WGUS63 KMKX 211141
FFAMKX

Flood Watch
National Weather Service Milwaukee/Sullivan WI
641 AM CDT Tue Aug 21 2018

WIZ060-066-211245-
/O.CAN.KMKX.FF.A.0003.000000T0000Z-180821T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ozaukee-Milwaukee-
Including the cities of Mequon, Cedarburg, Grafton, West Allis, 
Wauwatosa, Greenfield, Franklin, Oak Creek, South Milwaukee, 
and Cudahy
641 AM CDT Tue Aug 21 2018

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of southeast Wisconsin has
been cancelled. 

The heavy rain threat has ended across Ozaukee and Milwaukee
counties. 


$$

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this flash flood watch went out at Aug 19, 12:51 PM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, Aug 19, 12:51 PM CDT, 1 hour 2 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Milwaukee/Sullivan WI
1251 PM CDT Sun Aug 19 2018

.UPDATE...

The forecast looks on track for this afternoon and tonight.

&&

.AVIATION(18Z TAFS)...

Scattered to broken diurnal cumulus clouds are expected to linger
this afternoon, with any ceilings gradually lifting above 3000
feet by later this afternoon. These clouds should dissipate early
this evening. Light winds are expected, with an east southeast
lake breeze near Lake Michigan.

Middle to high clouds will gradually push eastward into the area
tonight into Monday morning. East southeast winds tonight will
gradually increase Monday. Any fog will be limited to the river
valleys and low lying areas, as the clouds and winds should limit
the extent of the fog.

First band of showers and some thunderstorms should push
northeast into the area Monday afternoon, reaching Madison by 19Z
Monday, and the eastern terminals by 22Z Monday. Ceilings and
visibility values will drop to IFR category or lower in any
thunderstorms. Heavy rainfall is possible as well.

The showers/storms and possible heavy rainfall should linger
Monday evening, before slowly ending from west to east later
Monday night into Tuesday morning. Winds should back to the north
by later Monday night, before becoming gusty Tuesday.

&&

.PREV DISCUSSION... (Issued 1029 AM CDT Sun Aug 19 2018)

UPDATE...

Allowed the Dense Fog Advisory to end at 9 AM CDT across portions
of the area. There may still be patchy dense fog toward the
Reedsburg and Wisconsin Dells areas for another hour or two.
Otherwise, any lingering fog will mix out with daytime heating by
early this afternoon.

Diurnal cumulus clouds should be scattered to broken into this
afternoon, as daytime heating increases. Winds will east to
southeast into the afternoon near Lake Michigan. Highs should
reach the lower 80s inland, with slightly cooler values near the
lake.

May see patchy fog later tonight, though it should not be as
widespread as this morning, with middle to high clouds moving into
the region.

Still looks like there will be a good shot at heavy rainfall
across portions of the area Monday afternoon into Monday night.
Latest CAMs suggest that convection will pivot across southern
and eastern parts of the area during this period.

High precipitable water values, with moist adiabatic and
saturated forecast soundings, will bring a favorable heavy
rainfall and possible flooding/flash flooding setup. Some of this
may occur over parts of the area that already has seen flooding
and heavy rainfall from last Thursday and Friday. Will consider
parts of the area for a Flood Watch for Monday afternoon/night.

MARINE...

Light east to southeast winds are expected into this afternoon
across the nearshore waters of Lake Michigan. Waves will be light,
generally 1 foot or less.

Onshore winds will increase later tonight into Monday night,
before backing north early Tuesday morning. Gusty north to
northwest winds are then expected Tuesday into Tuesday night,
before weakening, with low pressure passing by to the south.

This period will see increasing waves, into the 2 to 4 foot range
Monday, and 3 to 5 feet Monday night. Waves should remain in the
3 to 6 foot range Tuesday into Tuesday night, highest toward the
open waters of Lake Michigan. A Small Craft Advisory will likely
be needed for Monday night into Tuesday night.

PREV DISCUSSION... (Issued 628 AM CDT Sun Aug 19 2018)

UPDATE...

Fog continues across the central portion of the forecast area.
This should dissipate quite rapidly between 8 and 9 AM.

AVIATION(12Z TAFS)...

Dense fog will remain a concern for another hour or two at the
terminals, with the exception of KMKE, where fog has stayed to the
west. Fog is expected to dissipate rather quickly between 8 and 9
AM, with VFR then expected for the rest of the day.

Winds will increase from the east and southeast this evening into
the overnight hours, as low pressure approaches from the west. A
few gusts will be possible at MKE, with a steady breeze elsewhere.
Precipitation will begin to move toward the area tomorrow
morning, but the terminals should remain dry until after 12Z.

PREV DISCUSSION... (Issued 246 AM CDT Sun Aug 19 2018)

DISCUSSION...

Early this Morning through Tonight...Forecast Confidence is
High...

Fog is again a concern this morning across the area. Fog is fairly
widespread as of 2 AM, but visibilities have been somewhat
variable, ranging from 1 to 2 miles to a 1/4 mile. Will continue
to keep an eye on vis trends and potential need for a Dense Fog
Advisory at some point.

Fog will lift within a few hours of sunrise, with today likely to
be quite similar to yesterday, with highs around 80.

Southeast winds will start to increase this evening, continuing
through the overnight hours as low pressure deepens to our west.
Precipitation will start to move into the far southwestern edge of
the forecast area around sunrise Monday morning.

Monday through Tuesday - Confidence...Medium
Closed 500 millibar low vicinity of Omaha or just south is proggd
to open into a more progressive wave as it heads east/northeast
this period passing east of the area early Tuesday. Considerable
moisture will advect north/northwestward ahead of the low in the
amplifying thermal ridge area/warm conveyor belt region ahead f
the advancing low. This in combo with increasing dcva with the
advancing mid level trough will lead to widespread rain and
thunderstorms. A modest upper jet is proggd ahead of the low with
enhanced divergence within this left exit region later Monday into
Monday evening. Still looks like a decent amount of rain with
this system as appreciable cyclogenesis tracks across or just
south of se WI. The GFS which had been a much weaker and further
south solution has really joined forces with the earlier
advertised track/strength of the GEM/ECMWF with the consensus
pointing to this low tracking through the extreme southeast
WI/extreme northeast Illinois vicinity. Progs still keying on
Monday afternoon into at least parts of Monday night for the
heaviest precip potential. This system has the look of a classic
low scenario with the initial waa/most advection surge with the
laying out of a def zone band of rain, potentially heavy, on the
nw side, which could set up across parts of the cwa and
potentially add to the woes of areas already hit by heavier rains
this past Friday. A little early to zero in on exactly where that
band sets up but could see where eventually a surgical type FFA
could come into play focusing on portions of the interior of the
cwa that got hit hard Friday. As the low heads east Tuesday would
expect any lingering rain to gradually wind down. Overall a
cloudy, damp and breezy period is shaping up with some hefty rain
totals looking likely for parts of the cwa.

Tuesday night through Thursday night - Confidence...Medium
Expecting a prolonged quiet period as ridging builds in.
We'll get back to some warming temps again as the high clears to
the east by about Thursday and a return flow sets up. Pattern is
suggesting any precip with next system will stay to our west or
northwest.

Friday through Saturday - Confidence...Low to Medium
Models are showing a shortwave trough that would move through
Friday afternoon or Friday night. This is faster than the prior
run. An ssw 850 jet is proggd to increase moisture ahead of this
trough and there would be appreciable upper dynamics in play to
support a potential round of shra/tsra Friday or Friday night.
Models may still bounce around on the details of this so for now
will just ride with the blended guidance. Looks like some pretty
warm air is poised to return late in this period and beyond.

AVIATION(09Z TAFS)...IFR ceilings and visibility will be the main
concern this morning, with areas of fog and stratus across the region.
Conditions should improve within a few hours of sunrise.

VFR is expected today, with east to southeast winds. Winds will
start to increase this evening, as low pressure deepens to the
west. Some gustiness will be possible, especially at KMKE, where
winds will be coming right off of Lake Michigan.

MARINE...Quiet conditions are expected through the daytime hours
today. Southeast to east winds will increase later this evening into
tonight, as low pressure develops and approaches from the west.
15 to 20 knot gusts are expected overnight into Monday, with waves
building to 2-3 feet by Monday morning.

North winds then increase early Tuesday as the surface low pulls
east of the area. 20-25 knot gusts are expected for much of the
day Tuesday, with waves increasing to 3-5 feet, especially near
open waters. A Small Craft Advisory will likely be needed for this
timeframe.

BEACHES...Onshore flow will increase later tonight, with 2-3 foot
waves along the Wisconsin shoreline Monday night. Elevated winds and
waves will then continue through the day Tuesday, as winds become
gusty from the north.

Increased winds and waves will result in a risk for rip currents
and strong structural currents.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...None.
&&

Update...Wood
Today/Tonight and Aviation/Marine...Boxell
Monday THROUGH Saturday...Collar
Hazardous weather outlook, Aug 19, 10:08 AM CDT, 3 hours 45 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
1008 AM CDT Sun Aug 19 2018

WIZ046-047-051-052-056>060-062>072-201515-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1008 AM CDT Sun Aug 19 2018

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

More heavy rainfall and thunderstorms are possible from Monday
into Tuesday, as another low pressure area moves through the
region. There is a potential for flash flooding in urban areas,
and rural areas that have received several inches of rain the past
few days.

There is a chance of thunderstorms Friday and Friday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed, but rainfall and flooding
reports are appreciated.

LMZ643>646-201515-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
1008 AM CDT Sun Aug 19 2018

This Hazardous Weather Outlook is for portions of Lake Michigan.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There are chances of thunderstorms Monday afternoon into Tuesday
morning.

A Small Craft Advisory will likely be needed later Monday into
Tuesday, as a low pressure system moves through the area.

Wood
www.weather.gov/mkx

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 4:22 AM CDTDense Fog AdvisoryMKXColumbia, Dane, Dodge, Fond du Lac, Iowa, Jefferson and 5 more5 hr
Aug 19, 4:16 PM CDTBeach Hazards StatementMKXKenosha, Milwaukee, Ozaukee, Racine, Sheboygan59 hr

Nearby

Flash Flood Watches in Wisconsin, 2018Every flash flood watch in 2018

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.