Marine Forecasts

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7 Day Forecast for Marine Location Near Oostburg, WI

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Area Discussion for - Milwaukee/Sullivan, WI

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Fxus63 kmkx 191144 aaa afdmkx area forecast discussion... Updated national weather service milwaukee sullivan wi 644 am cdt Mon aug 19 2019 Update No changes to the forecast. Aviation(12z tafs) Winds will be light today allowing for a weak lake breeze. Expect few to scattered clouds around 3-5kft. Patchy fog is possible tonight. Light southeast winds Tuesday morning will become southwest Tuesday afternoon. Thunderstorms may impact far southern wisconsin late Tuesday morning. MVFR ceilings are likely, especially for far southwest wisconsin. Prev discussion (issued 307 am cdt Mon aug 19 2019) short term... today and tonight... Forecast confidence medium. There is some fog in the lower lying areas where skies are clear. Passing scattered clouds will keep it from getting dense, except in the wisconsin river valley. High pressure will be overhead today. Mostly sunny skies are expected. 925mb temps around 18c support a high around 80. It will be somewhat less humid, especially towards central wisconsin. Patchy fog is possible overnight. Tuesday ... Forecast confidence medium. The high will shift east bringing light south winds. Models are showing a storm complex developing across northern iowa early Tuesday and sliding into northern illinois during the day. It could clip southwest and far southern wisconsin. A shortwave will be tracking across this region, possible moving across southern wisconsin while a low level jet will nose into iowa then pivot into northern illinois. A 925-850mb baroclinic zone will be southwest of wisconsin so thinking majority of the convection will track south of us, from iowa into illinois along the instability gradient. We will be pretty capped but if the line pushes through there will be 1500-2000 j of instability and 30 knots of shear. So will have to watch for something strong to severe in far southwest to south-central wisconsin, in spc's marginal risk area. Long term... Tuesday night through Wednesday... Forecast confidence is medium. With the trend in guidance to show a morning MCS developing over ia and diving SE through il could end up setting us up better for a round of thunderstorms in the evening overnight. This is because the strength of the WAA previously advertised by the guidance would end up weaker due to the MCS passing to our south so the cap won't be nearly as strong. Steepening lapse rates aloft and a warm and humid airmass in place will allow for CAPE of 2,000 to 3,000 j kg. The issue that we have now is a trigger for convection. A secondary shortwave dropping S SE out of northern mn could spark convection along the incoming frontal boundary in the afternoon to our north. These storms could continue south into our area during the evening and overnight hours. The strength of the

instability could support stronger wind gusts and hail pending storms can get going. Ended up bringing pops up a bit for the overnight period to account for any storms that could roll through the area. For Wednesday models have subtle differences as an upper level wave moves across the great lakes. The ECMWF keeps just enough moisture over the area to spark some light showers along the wi il border during the afternoon hours Wednesday. Think that is overdone based on the amount of dry air streaming in aloft so have kept the forecast dry for Wednesday. Highs warm into the mid to upper 70s with breezy conditions expected behind the frontal passage. Wednesday night through Sunday... Forecast confidence is high. Cooler and dry weather is forecast for the rest of the week and into the weekend as high pressure settles in over the great lakes. A couple of good radiational cooling nights will occur during this period with guidance likely a on the warmer side. So, have tried to knock overnight lows down a degree or two to reflect these cooler temps. Highs each day will stay in the 70s with mostly sunny skies. As we head into the weekend the high begins to kick east and moisture starts to return back to the north in western wi. Some disagreements in just how quickly this moisture shifts east into southern wi exists in latest guidance but have trended the forecast towards the ecmwf, which is the drier solution. Rain storm chances then shift east into the region for Sunday. Aviation(9z tafs)... there will be some fog at times early this morning. Passing clouds will keep it from getting dense. Winds will be light today allowing for a weak lake breeze. Expect few to scattered clouds around 3- 5kft. Patchy fog is possible tonight. Light southeast winds Tuesday morning will become southwest Tuesday afternoon. Thunderstorms may impact far southern wisconsin late Tuesday morning. MVFR ceilings are likely, especially for far southwest wisconsin. Marine... high pressure overhead will bring light winds today and tonight. South winds may reach 15 to 20 knots across the northern third of the open waters. South to southwest winds on Tuesday will be 10 to 20 knots. Waves will be 3 feet or less across the open waters. Lighter winds are expected Tuesday night. Gusty north winds are expected on Wednesday into Wednesday night ahead of high pressure in the northern plains. They will remain somewhat elevated into Thursday. Mkx watches warnings advisories Wi... None. Lm... None. Update... Marquardt today tonight and aviation marine... Marquardt Tuesday through Sunday... Stumpf

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
SGNW3 - Sheboygan, WI	8 mi	34 min	N 7 G 7	65°F			1016.7 hPa (+1.3)	56°F
PWAW3 - Port Washington, WI	20 mi	54 min	N 1.9 G 8	71°F			1017.6 hPa

Wind History for Kewaunee MET, WI

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Sheboygan County Memorial Airport, WI	14 mi	41 min	NNW 4	10.00 mi	Fair	69°F	57°F	68%	1016.5 hPa

Link to 5 minute data for KSBM

Wind History from SBM (wind in knots)

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Tide / Current Tables for

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Tide / Current Tables for

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Weather Map and Satellite Images

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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

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Wind Forecast for Milwaukee/Sullivan, WI (10,2,3,4)

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Ground Weather Radar Station Green Bay, WI

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Disclaimer: 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.