Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:13AM||Sunset 7:46PM||Thursday August 24, 2017 5:38 AM CDT (10:38 UTC)||Moonrise 9:17AM||Moonset 9:34PM||Illumination 5%|
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|LMZ644 Port Washington To North Point Light Wi- 505 Am Cdt Thu Aug 24 2017 |
Today..Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Isolated showers and Thunderstorms in the morning. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon.
Tonight..Northeast wind 10 to 15 knots easing to 5 to 10 knots in the late evening and overnight. Clear. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the morning.
Friday..East wind 5 to 10 knots. Sunny. Waves 1 to 2 feet.
Friday night..East wind 5 to 10 knots easing to 5 knots early in the morning. Partly cloudy. Waves around 1 foot.
|LMZ644 Expires:201708241600;;315745 FZUS53 KMKX 241005 NSHMKX Nearshore Marine Forecast National Weather Service MILWAUKEE/SULLIVAN WI 505 AM CDT Thu Aug 24 2017 For waters within five nautical miles of shore on Lake Michigan LMZ644-241600-|
7 Day Forecast for Marine Location Near Madison, WIHourly EDIT Help
Area Discussion for - Milwaukee/Sullivan, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 kmkx 240837|
area forecast discussion
national weather service milwaukee sullivan wi
337 am cdt Thu aug 24 2017
Today and tonight - confidence Medium to high.
Backdoor cold front will sweep south across southern wi through the
early morning. In addition, vigorous mid-level short wave over
northern wi will track southeast. These features will bring a few
showers to the CWA this morning, with isolated thunderstorms
possible over the nearshore waters due to lake induced instability.
The showers should become more isolated as they progress southeast
through the early morning as the synoptic forcing wanes. Left exit
region of upper jet moves rapidly off to the east early this morning
as upper jet weakens. Clouds associated with these features will
affect the area this morning but should transition to few-sct
cumulus later this morning and afternoon. More clouds may linger
closer to the lakeshore today due to frictional convergence due to
northeast winds but even these clouds should eventually be
overwhelmed by surge of drier air.
Clear to partly cloudy and cool tonight with warm air advection
showers remaining well west of the area. Overnight temperatures
will dip into the 40s to lower 50s with slightly warmer temps by
lake michigan. Patchy late night fog will be likely in low areas
but not ready to introduce into the forecast yet due to today's
expected drying and falling dewpoints.
Friday and Saturday - confidence Medium.
Northwest flow aloft will persist through this period until the
ridge axis moves over the region on Saturday. A weak shortwave
immediately behind the ridge axis will bring some cva and upper-
level divergence on Saturday. As you would expect, high pressure
will dominate the lower levels during this period as it gradually
pushes to the east. By Saturday afternoon, developing low
pressure over the northern plains will move northeast, bringing
some warm, moist advection to the mid levels over southern wi.
Any showers that develop from this mid upper level support will
have to fall through quite a bit of dry air closer to the surface,
so will keep just slight chance pops in our west on Saturday
Saturday night through Wednesday - confidence Medium.
By Saturday night, a considerable short wave will drop over the
northern plains, swinging into wisconsin on Sunday, then slowing
quite a bit as the upper low becomes cut off from the polar jet. The
cut-off low will remain in our vicinity through at least Tuesday,
perhaps longer depending on your model of choice. The previously
mentioned surface low will respond by first deepening as it moves to|
our northwest through wisconsin, then filling back in as it moves
farther away from the upper low.
With more moisture in the lower levels on Saturday night, i'm
comfortable increasing pops closer to likely on Saturday night. No
instability reaches wisconsin until after the surface warm front
moves through wisconsin and daytime heating can do its thing on
Sunday. Therefore sticking with just showers until Sunday afternoon.
On and off storms should persist through early next week thanks to
the upper low sitting over the region. However, any precip will be
weakly forced since the surface low does fill in so quickly and
there is never a good shot of cold air behind the low. High pressure
should move back into the region by Wednesday, but depending on how
long that upper low sticks around, we may see some showers storms on
Wednesday as well.
Vfr conditions are expected for most of the TAF period but may be
a brief period of lower clouds closer to lake michigan this
morning as winds pick up from the northeast increasing convergence
along the lakeshore. MostlyVFR CIGS and isolated -shra
associated with a passing mid-level short wave this morning should
transition to few-sct cumulus this afternoon.
Back door cold front located between sheboygan and port
washington and will progress southward across the near shore waters
through the early morning. Mariners should expect a rapid wind
shift from the west to the north to northeast with a period of gusts
up to 20 knots possible upon frontal passage. Convergence along
this front and unstable conditions over the lake will cause isolated
showers with more numerous showers over the open waters of the lake.
An isolated thunderstorm is expected as well. The unstable
conditions and deep convective cloud depth may cause several
waterspouts to form as well near the front this morning. North to
northeast winds of 10 to 20 knots will continue through the day with
waves of 2 to 4 feet.
Northeast winds of 10 to 20 mph will cause a moderate
swim risk at lake michigan beaches today. Breaking waves and
currents are expected, especially at beaches with a north to
northeast exposure. Swimmers will need to be cautious around
piers, breakwalls and river outlets. The moderate swim risk
conditions will continue into this evening.
Mkx watches warnings advisories
Today tonight and aviation marine... mbk
Friday through Wednesday... Bsh
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|MLWW3 - Milwaukee, WI||82 mi||48 min||N 11 G 13||61°F|
|PWAW3 - Port Washington, WI||85 mi||58 min||NE 13 G 17||63°F||1018.6 hPa|
|KNSW3 - Kenosha, WI||93 mi||38 min||W 8 G 9.9||60°F||1017.3 hPa (+0.7)|
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Middleton Muni - Morey Field, WI||6 mi||63 min||N 0||10.00 mi||Fair||52°F||52°F||100%||1019.3 hPa|
Wind History from C29 (wind in knots)
|1 day ago||W||W||W||W|
|2 days ago||Calm||Calm||Calm||Calm||N||NE||SE||S||S||S||SW||SW||SW||Calm||S||SW||S||S||NW||W||W||W||W||W |
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Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Midwest EDIT
Wind Forecast for Milwaukee/Sullivan, WI (6,6,7,8)(on/off)  Help
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.