Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
839 PM CDT Sun Aug 17 2025
LMZ643>646-181030-
/O.CON.KMKX.SC.Y.0077.000000T0000Z-250818T1800Z/
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-
839 PM CDT Sun Aug 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT MONDAY...
* WHAT...Northeast winds 10 to 20 kt and waves 4 to 6 ft. Winds
veer southeast late tonight into Monday.
* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.
* WHEN...Until 1 PM CDT Monday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
323 PM CDT Sun Aug 17 2025
LMZ542-543-180430-
/O.CON.KGRB.SC.Y.0067.000000T0000Z-250818T2100Z/
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
323 PM CDT Sun Aug 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT MONDAY...
* WHAT...East winds around 15 kt with a few gusts up to 25 kt and
waves 3 to 6 ft.
* WHERE...Lake Michigan nearshore waters from Sturgeon Bay to
Sheboygan.
* WHEN...Until 4 PM CDT Monday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
320 PM CDT Sun Aug 17 2025
LMZ740>742-180430-
/O.CON.KLOT.SC.Y.0076.000000T0000Z-250818T1500Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
320 PM CDT Sun Aug 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT
MONDAY...
* WHAT...Significant waves to 6 ft occasionally to 8 ft expected.
* WHERE...Winthrop Harbor to Calumet Harbor IL.
* WHEN...Until 10 AM CDT Monday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Beach Hazards Statement
Lakeshore Hazard Message
National Weather Service Milwaukee/Sullivan WI
526 PM CDT Sun Aug 17 2025
WIZ052-060-066-071-072-180630-
/O.CON.KMKX.BH.S.0011.000000T0000Z-250818T1800Z/
Sheboygan-Ozaukee-Milwaukee-Racine-Kenosha-
526 PM CDT Sun Aug 17 2025
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY
AFTERNOON...
* WHAT...Life threatening waves of 3 to 6 feet and dangerous
currents are expected.
* WHERE...Sheboygan, Ozaukee, Milwaukee, Racine and Kenosha
Counties.
* WHEN...Through Monday afternoon.
* IMPACTS...Dangerous swimming conditions are expected due to
high waves and onshore winds.
* ADDITIONAL DETAILS...Through this evening, northerly exposed
beaches, piers, and/or breakwalls will be most vulnerable to
these dangerous currents. By Monday morning, southerly exposed
areas will be at greater risk as wind and wave directions veer
southeasterly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay out of the water and away from dangerous areas like piers
and breakwalls. Strong structural and longshore currents are
expected. Rip currents are possible.
&&
$$
Coastal Hazard Message
National Weather Service Chicago IL
329 PM CDT Sun Aug 17 2025
ILZ006-103-104-INZ001-002-180430-
/O.CON.KLOT.BH.S.0008.000000T0000Z-250818T1500Z/
Lake IL-Northern Cook-Central Cook-Lake IN-Porter-
329 PM CDT Sun Aug 17 2025
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY
MORNING...
* WHAT...High wave action and dangerous currents expected at
Lake Michigan beaches. Waves 3 to 6 ft expected.
* WHERE...In Illinois, Lake, Northern Cook and Central Cook
Counties. In Indiana, Lake and Porter Counties.
* WHEN...Through Monday morning.
* IMPACTS...Swimming conditions will be life threatening,
especially for inexperienced swimmers. For information on swim
advisories or bans at Chicago beaches: www. cpdbeaches. com.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain out of the water to avoid dangerous swimming conditions
and do not venture out onto piers, jetties, breakwalls, or other
shoreline structures.
&&
$$
Coastal Hazard Message
National Weather Service Green Bay WI
324 PM CDT Sun Aug 17 2025
WIZ040-050-180430-
/O.CON.KGRB.BH.S.0009.000000T0000Z-250818T2100Z/
Kewaunee-Manitowoc-
324 PM CDT Sun Aug 17 2025
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY
AFTERNOON...
* WHAT...High waves and dangerous currents.
* WHERE...Beaches along Lake Michigan in Kewaunee and Manitowoc
Counties.
* WHEN...Through Monday afternoon.
* IMPACTS...Dangerous swimming conditions are expected. Strong
currents can pull swimmers into deeper water and high waves
can sweep people off piers.
* ADDITIONAL DETAILS...Beaches that will be most susceptible to
the dangerous swimming conditions include... Cresent Beach and
City of Kewaunee Beach in Kewaunee County. Point Beach, Neshotah
Beach and Red Arrow Beach in Manitowoc County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain out of the water to avoid hazardous swimming conditions.
&&
$$
Flood Watch
Flood Watch
National Weather Service La Crosse WI
300 PM CDT Sun Aug 17 2025
.Rainfall over the past several days has resulted in saturated
soils. Showers and storms will move into the area late this evening
and continue into Monday morning. This additional rainfall could
produce flash flooding.
MNZ079-086>088-094-095-WIZ032-033-181500-
/O.NEW.KARX.FA.A.0005.250818T0300Z-250818T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Buffalo-Trempealeau-
Including the cities of Rochester, Wabasha, Arcadia, Winona,
Austin, Preston, Alma, Whitehall, and Dodge Center
300 PM CDT Sun Aug 17 2025
...FLOOD WATCH IN EFFECT FROM 10 PM CDT THIS EVENING THROUGH MONDAY
MORNING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of southeast Minnesota, including the following
counties, Dodge, Fillmore, Mower, Olmsted, Wabasha and Winona and
west central Wisconsin, including the following counties, Buffalo
and Trempealeau.
* WHEN...From 10 PM CDT this evening through 10 AM Monday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Saturated soils and additional rainfall could produce flash
flooding late this evening and overnight.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
JSB
Special Weather Statement
Special Weather Statement
National Weather Service Quad Cities IA/IL
858 PM CDT Sun Aug 17 2025
IAZ053-054-065-066-180300-
Clinton IA-Jackson IA-Cedar IA-Jones IA-
858 PM CDT Sun Aug 17 2025
...A strong thunderstorm will impact portions of western Clinton,
southwestern Jackson, northern Cedar and southern Jones Counties
through 1000 PM CDT...
At 857 PM CDT, Doppler radar was tracking a strong thunderstorm near
Oxford Junction, or 10 miles northeast of Stanwood, moving southeast
at 20 mph.
HAZARD...Wind gusts up to 50 mph, minor flooding and half inch hail.
SOURCE...Radar indicated.
IMPACT...Strong winds could break small tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible. Slowing or redirecting of traffic due to ponding
or flowing water. Closure of waterfront access due to
flooding.
Locations impacted include...
Maquoketa, Tipton, Mechanicsville, Stanwood, DeWitt, Lowden,
Wheatland, Olin, Grand Mound, Delmar, Wyoming, Oxford Junction, Lost
Nation, Calamus, Bennett, Onslow, Welton, Monmouth, Toronto, and
Morley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4185 9048 4177 9084 4177 9090 4176 9090
4170 9116 4195 9137 4201 9137 4217 9077
TIME...MOT...LOC 0157Z 322DEG 16KT 4195 9101
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
$$
Friedlein
Hazardous Weather Outlook
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
906 PM CDT Sun Aug 17 2025
LMZ643>646-190215-
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-
906 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
Small Craft Advisory in effect for breezy east winds and waves up
to 6 feet.
.DAYS TWO THROUGH SEVEN...Monday through Sunday
Small Craft Advisory conditions will continue through Monday
morning.
There will be chances for thunderstorms Monday through Tuesday
morning.
$$
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
906 PM CDT Sun Aug 17 2025
WIZ046-047-051-052-056>060-062>072-190215-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
906 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Beach Hazards Statement in effect for waves from 3 to 6 feet as
breezy onshore winds remain in place. Expect dangerous swimming
conditions especially for northerly exposed beaches, piers, and/or
breakwalls.
.DAYS TWO THROUGH SEVEN...Monday through Sunday
Expect Beach Hazards conditions to continue through at least
Monday morning, possibly into the afternoon.
There will be continued chances for thunderstorms Monday through
Tuesday morning. Storms will be capable of producing cloud to
ground lightning, localized damaging wind gusts and locally heavy
rainfall, particularly in locations experiencing repeated rounds
of storms.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time, but CoCoRaHS rain
reports are appreciated.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
341 PM CDT Sun Aug 17 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-182045-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
341 PM CDT Sun Aug 17 2025 /441 PM EDT Sun Aug 17 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
High Swim Risk at Southern Lake Michigan Beaches
Limited Thunderstorm Risk.
DISCUSSION...
Isolated thunderstorms are possible tonight, mainly west of a
Dixon to Watseka line. Storms will be capable of locally heavy
downpours and gusty winds.
Increasing winds and waves on Lake Michigan will result in
dangerous swimming conditions at area beaches through Monday.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Elevated Flooding Risk.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Tuesday...
Limited Flooding Risk.
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the south-southeast at 30 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
341 PM CDT Sun Aug 17 2025
LMZ740>745-182045-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
341 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Hazardous conditions for small craft along the Illinois shore.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Hazardous conditions for small craft along the Illinois shore.
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Tuesday...
Hazardous conditions for small craft are likely.
Limited Thunderstorm Risk.
Wednesday...
Hazardous conditions for small craft are likely.
$$
KJB
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Green Bay WI
335 PM CDT Sun Aug 17 2025
LMZ521-522-541>543-182045-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
335 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Tonight
Conditions hazardous to small craft are expected along Lake
Michigan due to persistent northeast to east winds and high
waves. A Small Craft Advisory is in effect. Small craft should
exercise caution on the bay as well due to gusty northeast winds
and elevated waves this evening.
.DAYS TWO THROUGH SEVEN...Monday through Sunday
Conditions hazardous to small craft are expected along Lake
Michigan due to persistent southeast winds and high waves on
Monday.
Thunderstorms are possible at times Monday. Any storm would pose
a hazard to mariners.
$$
Kruk
Hazardous Weather Outlook
National Weather Service Green Bay WI
335 PM CDT Sun Aug 17 2025
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-182045-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
335 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
There is a high risk of dangerous swimming conditions and rip
currents along Lake Michigan beaches. A Beach Hazards Statement
is in effect.
There is a chance of thunderstorms late tonight. Severe weather is
not expected.
.DAYS TWO THROUGH SEVEN...Monday through Sunday
There is a high risk of dangerous swimming conditions and rip
currents along Lake Michigan beaches on Monday.
Rain and thunderstorms are expected Monday and Monday night.
A few of the storms may be strong to severe Monday afternoon,
capable of producing damaging winds. Heavy rainfall may cause
localized flooding in low-lying and urban areas.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight.
$$
Hazardous Weather Outlook
National Weather Service La Crosse WI
308 PM CDT Sun Aug 17 2025
IAZ008>011-018-019-029-030-MNZ096-WIZ017-029-034-041>044-053>055-
061-181100-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Houston-Taylor-Clark-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
308 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.
.DAY ONE...This Afternoon and Tonight
Storm chances increase late this evening and overnight. Heavy
rainfall rates with these storms will be capable of flash
flooding.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Widespread storms Monday and these storms may linger in central
Wisconsin Monday night. Heavy rainfall with these storms will be
capable of flash flooding.
.SPOTTER INFORMATION STATEMENT...
No action needed.
.EMERGENCY MANAGEMENT COORDINATION...
No webinar is scheduled.
$$
Hazardous Weather Outlook
National Weather Service La Crosse WI
308 PM CDT Sun Aug 17 2025
MNZ079-086>088-094-095-WIZ032-033-181100-
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Buffalo-Trempealeau-
308 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of southeast
Minnesota and west central Wisconsin.
.DAY ONE...This Afternoon and Tonight
A Flash Flood Watch is in effect from late this evening into
Monday morning. Storm chances increase late this evening and overnight.
Heavy rainfall rates with these storms will be capable of flash
flooding.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Widespread storms Monday and these storms may linger in central
Wisconsin Monday night. Heavy rainfall with these storms will be
capable of flash flooding.
.SPOTTER INFORMATION STATEMENT...
No action needed.
.EMERGENCY MANAGEMENT COORDINATION...
No webinar is scheduled.
$$
Boyne
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
304 PM CDT Sun Aug 17 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-182015-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
304 PM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...THIS AFTERNOON AND TONIGHT
Hot and humid conditions will continue today. A Heat Advisory
has been issued for this afternoon and early evening for locations
generally along and south of Highway 30.
Chances of thunderstorms will increase once again this evening
into tonight, some of which could become strong to severe. The
Storm Prediction Center has a Marginal Risk (level 1 of 5) of
severe storms outlooked for locations west of an Iowa City to
Dubuque line. Damaging winds are the main threats, with the
potential of torrential downpours that could lead to localized
flash flooding.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY
Hot and humid conditions are likely once again Monday, with
additional heat headlines likely needed for areas along and south
of Interstate 80.
Chances of thunderstorms will continue through Tuesday, with some
strong to severe storms possible at times. Damaging winds remain
the primary threat, along with torrential downpours that could
result in localized flash flooding. A Marginal Risk for severe
storms remains over most of the area Monday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is possible this evening through tonight.
Reports of severe weather would be appreciated along with any
reports of rainfall over one inch.
$$
