Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Sheboygan, WI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:34AMSunset 7:16PM Wednesday March 29, 2017 10:14 AM CDT (15:14 UTC) Moonrise 7:46AMMoonset 9:16PM Illumination 5% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ669 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 901 Am Cdt Wed Mar 29 2017 Sheboygan Wi To Pentwater Mi South...
Rest of today..East winds 10 to 20 kt becoming northeast 15 to 25 kt. Areas of fog this morning. Waves 2 to 4 ft building to 3 to 5 ft occasionally to 7 ft.
Tonight..Northeast winds 15 to 25 kt becoming east to 30 kt. A few gale force gusts to 35 kt possible after midnight. Chance of rain in the evening...then rain likely overnight. Waves 3 to 5 ft occasionally to 7 ft building to 6 to 9 ft occasionally to 11 ft.
Thursday..East winds to 30 kt. A few gale force gusts to 35 kt in the morning. Rain. Waves 7 to 10 ft occasionally to 13 ft.
Thursday night..East winds to 30 kt becoming northeast 15 to 25 kt. Rain likely in the evening...then chance of rain overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Friday..Northeast winds to 30 kt becoming north. Chance of rain. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
Friday night..North winds to 30 kt diminishing to 10 to 20 kt overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Saturday..North winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft occasionally to 7 ft subsiding to 2 to 4 ft.
Sunday..East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 ft or less.
LMZ669 Expires:201703292130;;262847 FZUS63 KLOT 291401 GLFLM OPEN LAKE FORECAST FOR LAKE MICHIGAN NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 901 AM CDT WED MAR 29 2017 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN. WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED. .SYNOPSIS...HIGH PRESSURE OF 30.5 INCHES IS OVER HUDSON BAY WITH RIDGING EXTENDING INTO THE CENTRAL GREAT LAKES WHICH WILL SHIFT TO THE EASTERN LAKES TONIGHT. A 29.7 INCH LOW IS OVER OKLAHOMA EARLY THIS MORNING AND WILL LIFT TO NORTHERN MISSOURI THURSDAY THEN TO LAKE ERIE ON FRIDAY. A RIDGE AVERAGING 30.2 INCHES WILL BUILD ACROSS THE CANADIAN PRAIRIES AND UPPER MIDWEST SATURDAY AND WILL SHIFT TO THE CENTRAL GREAT LAKES ON SUNDAY. ANOTHER LOW OF 29.6 INCHES WILL LIFT FROM ARKANSAS MONDAY TO LAKE ERIE ON TUESDAY. LMZ080-669-671-673-675-777-779-870-872-874-876-878-292130-

7 Day Forecast for Marine Location Near Sheboygan, WI
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location: 43.71, -87.19     debug


Area Discussion for - Milwaukee/Sullivan, WI
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Fxus63 kmkx 291509
afdmkx
area forecast discussion
national weather service milwaukee/sullivan wi
1009 am cdt Wed mar 29 2017

Marine Dense fog advisory was allowed to expire at 9 am. Main
focus shifts now to increasing onshore and long duration wind
regime tonight which gets underway tonight. This will build high
waves near the shore and remain in place through late Friday
night.

Pc

Prev discussion (issued 625 am cdt Wed mar 29 2017)
update...

was tempted to cancel the dense fog advisory for a couple
northeast counties given observations and webcams, but latest
satellite is showing some fog or low cloud development in that
area. Thus figured it was worth keeping those counties in for a
couple more hours until the expiration.

Otherwise, should see the fog hang on in the south half of the
forecast area this morning... Winding down around mid-morning. Fog
may keep going into late morning toward lake michigan.

Aviation(12z tafs)...

will see fog hang on into mid-morning, possibly into late morning
toward lake michigan. Daytime mixing should improve conditions for
the afternoon.

Attention then turns to precip ahead of approaching low pressure.

Rain will move into the west by late afternoon, spreading east
across the forecast area during the evening hours. The rain will
persist through Thursday.

Still looks like there could be a mix with or changeover to snow
in the north tonight into Thursday morning, mainly north of a
line from wisconsin dells to port washington. It will be a
struggle to get much accumulation due to borderline temperatures,
though an inch or so is possible. Snow will transition to rain
everywhere by late Thursday morning.

Lower clouds and visibilities will return tonight into Thursday
with the arrival of the precipitation.

Prev discussion... (issued 326 am cdt Wed mar 29 2017)
short term...

today and tonight... Forecast confidence is medium to high:
extended the dense fog advisory farther west per latest satellite
and obs. May need to eventually include the last row of western
counties if this area of fog keeps going. Still looks like daytime
mixing should bring an end to the dense fog by mid-morning, so no
change to the expiration time of the advisory.

High clouds will continue to push in from the west this
morning... With cloud bases gradually lowering into the afternoon as
deeper moisture arrives ahead of approaching low pressure. Tricky
temps today given the current fog/stratus in the area and
approaching clouds. Stuck close to a blend of model temps due to the
uncertainty.

Rain is expected to arrive in the west by late this afternoon,
spreading east across the forecast area this evening and continuing
overnight. The rain is still expected to mix with or changeover to
snow in the north. Models have been trending north with this system
the last 24-36 hours though, which has resulted in somewhat lighter
amounts this forecast. Temperatures will be borderline through this
event, so accumulations will struggle where it does snow.

Long term...

Thursday and Friday... Forecast confidence is medium.

The weakening upper low and surface low will track across illinois
through tonight. Rounds of light rain are expected across southern
wi Thu and Thu night as waves of vorticity and frontogenesis
spread through the area. Brisk east winds and precip will keep
temperatures raw, with highs Thu in the upper 30s and lows thu
night in the lower to mid 30s.

There is a chance for some snow to be mixed into the rain early thu
morning, but temps will warm above freezing rather quickly as the
low gets closer.

Drizzle or light rain is expected to linger all the way through
Friday.

Saturday... Forecast confidence is high.

Drier air with high pressure building into the region on Saturday
will help to scour out the clouds a little. Highs should return to
the 50s inland from the lake.

Sunday through Tuesday... Forecast confidence is medium.

Another upper low will track from the southern plains through the
mid mississippi river valley over the weekend. The rain with this
system is expected to remain primarily south of the wi/il border,
but may clip southern wi Mon into Tuesday. Precip type should be all
rain.

Aviation(06z tafs)...

fog and low clouds will continue to drift westward across southern
wisconsin early this morning. Improving conditions are expected by
mid morning on Wednesday withVFR cigs/vsbys returning for a time.

Lower MVFR CIGS will stream back in by evening ahead of advancing
low pressure. Precipitation will overspread the area during the
evening. It should remain rain along the wi/il state line, but
become mixed with or change over to snow for a time north of
milwaukee and madison.

Marine...

dense fog is likely to continue into mid-morning, so will leave the
advisory as is for now.

Gusty winds and higher waves are likely from this evening into
Friday night as low pressure moves through the region. Have decided
to issue a small craft advisory for this period.

Mkx watches/warnings/advisories
Wi... None.

Lm... Small craft advisory from 10 pm this evening to 4 am cdt
Saturday for lmz645-646.

Small craft advisory from 2 am Thursday to 4 am cdt Saturday for
lmz643-644.

Today/tonight and aviation/marine... Ddv
Thursday through Tuesday... Cronce


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi74 min N 9.9 G 11 37°F 1026.7 hPa (+0.7)36°F
PWAW3 - Port Washington, WI 42 mi34 min NE 8 G 9.9 40°F 1026.4 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi44 min E 1.9 G 2.9 46°F 35°F
BSBM4 - Big Sable Point, MI 43 mi34 min N 6 G 8.9 41°F 1027.1 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan, Sheboygan County Memorial Airport, WI35 mi21 minNE 1110.00 miFair42°F37°F85%1027 hPa

Wind History from SBM (wind in knots)
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Last 24hrNE7NE6NE10NE11NE12E9E7NE8NE6NE4NE4CalmSW3CalmCalmCalmNE4NE7NE8NE6NE4NE6NE8NE11
1 day agoNW3CalmSE5NE5E3E6E7NE8E7NE6NE4N3CalmNW3NW3N3N4NW5N6N6N5N5NE8NE8
2 days agoNE8NE9NE7NE9NE8NE7NE7N5NE3CalmCalmN4NW5W5NW3W5N5W4NW6NW5W4CalmW3Calm

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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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Milwaukee/Sullivan, WI (11,2,3,4)
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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.