Sunday, September24, 2017 L-36.com


Marine Weather and Tides
Sheboygan, WI

Version 3.4
What's New / NOTES
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 6:40AMSunset 6:44PM Sunday September 24, 2017 9:24 PM CDT (02:24 UTC) Moonrise 11:00AMMoonset 9:25PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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- 836 Pm Cdt Sun Sep 24 2017 Sheboygan Wi To Pentwater Mi South...
Rest of tonight..Southeast winds 10 to 15 kt becoming south. Waves 1 to 2 ft.
Monday..South winds 10 to 15 kt becoming variable around 10 kt in the afternoon. Waves 1 to 3 ft.
Monday night..Southeast winds 10 to 15 kt becoming south 5 to 10 kt. Waves 1 to 2 ft.
Tuesday..South winds 10 to 15 kt becoming southwest. Waves 1 to 2 ft.
Tuesday night..West winds 10 to 20 kt becoming northwest and increasing to 15 to 25 kt toward morning. Waves 1 to 2 ft building to 3 to 5 ft.
Wednesday..Northwest winds 15 to 25 kt in the morning...becoming north and easing to 15 to 20 kt in the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft late.
Wednesday night..North winds 10 to 20 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
Thursday..North winds 10 to 15 kt becoming west. Waves subsiding to 1 to 3 ft.
Friday..Northwest winds to 30 kt becoming north. Waves building to 4 to 7 ft occasionally to 9 ft.
LMZ669 Expires:201709250945;;886353 FZUS63 KLOT 250136 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 836 PM CDT Sun Sep 24 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...Low pressure of 29.8 inches over western Ontario will move northeast to James Bay through Monday...while high pressure of 30.3 inches slowly drifts from the eastern Great Lakes toward New England and weakens. Another low of 29.6 inches will lift across the northern Great Lakes Tuesday night and will trail a cold front across the lake. High pressure of 30.2 inches will spread across the Great Plains into Illinois and Indiana through Thursday. LMZ080-669-671-673-675-777-779-870-872-874-876-878-250945-

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 250005
afdmkx
area forecast discussion
national weather service milwaukee sullivan wi
705 pm cdt Sun sep 24 2017

Update
With high pressure situated over the great lakes, little change
to the previous forecast was needed. I did trim back the pops
early tomorrow afternoon. I did this because the GFS is the only
guidance showing QPF across our west before 00z, and the support
on the GFS is quite weak.

Aviation(00z tafs)
Vfr conditions will remain in place through the TAF period.

Tomorrow will be quite similar to today, with perhaps more
scattered 5kft clouds. River valley fog remains a possibility, and
showers should begin to move into our west Monday evening.

Prev discussion (issued 237 pm cdt Sun sep 24 2017)
short term...

tonight and Monday... Forecast confidence is high:
high pressure to the east will pull away tonight into Monday as a
weak trough approaches. Southerly low level flow between the
approaching trough and departing high will keep an unseasonably
warm airmass in the area. Temperatures tonight and tomorrow will
be fairly similar to the last 24 hours. The main difference will
be in increase in moisture which will produce more clouds. Thus
decided to go with high temps tomorrow just a little lower than
today.

Seems like enough moisture instability for a couple
showers storms in the west by tomorrow evening, so left some low
precip chances in there.

Monday night and Tuesday... Forecast confidence... High
a lead upper shortwave moves into the upper mississippi valley
region Tuesday evening, with the upper jet across eastern
minnesota and northwest wisconsin. Upper level divergence is
neutral or weak across southern wisconsin, but 700 mb upward
motion increases Tuesday afternoon south central sections. 700 850
mb rh increases south central. Surface based CAPE west and
northwest of madison rises to 1500 joules kg, but only around 500
joules kg of zero to 1 km mixed layer cape. With the marginal
forcing and shallow layer of moisture around 800 mb, will keep
shower and thunderstorm chances in the low to medium range.

The surface cold front does make it through south central
wisconsin Tuesday afternoon.

Long term...

Tuesday night and Wednesday... Forecast confidence... High
the lead upper shortwave moves to the north of lake superior,
with the upper jet across wisconsin. Moderate upper level
divergence overnight, lingering far southeast Wednesday morning.

Moderate 700 mb upward motion southeast Tuesday evening, then
downward motion spreading in from the west. Little in the way of
zero to 1 km mixed layer cape. Soundings do show moistening over
the atmospheric column. With the marginal forcing lifting
northeast, will keep shower chances in the low to medium range.

The surface cold front makes it through southeast wisconsin
Tuesday evening. Strong drying occurs Wednesday behind the cold
front.

Thursday through Sunday... Forecast confidence is medium
the upper trough re-establishes itself over the upper mississippi
valley Thursday, and over the great lakes Friday. Cooler air
(near normal) is expected, with some instability showers possible
with the upper trough, mainly Thursday night and Friday.

A large surface high moves across Saturday on the ecmwf, but is
quicker on the gfs.

Warm air advection begins on the GFS later Saturday, and on Sunday
on the slower ecmwf.

Aviation(18z tafs)...

vfr conditions are expected through Monday as southern wisconsin
sits under the western edge of high pressure. The only exception
could be a little river valley fog later tonight into early mon
morning. Few-sct diurnal cumulus are likely this afternoon and
again Monday afternoon. Could see an isolated shower storm in the
west by tomorrow evening.

Marine...

light winds and low waves are expected for the first couple days
of this week.

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... Bsh
tonight Monday and aviation marine... Ddv
Monday night through Sunday... Hentz


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi84 min S 8 G 8 73°F 1015.9 hPa (+0.0)66°F
45024 38 mi34 min SSE 3.9 G 3.9 71°F 70°F1 ft1017.4 hPa67°F
PWAW3 - Port Washington, WI 42 mi44 min S 2.9 G 5.1 72°F 1017.3 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi54 min E 2.9 G 4.1 70°F 62°F
BSBM4 - Big Sable Point, MI 43 mi44 min S 4.1 G 6 75°F 1017.9 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan County Memorial Airport, WI35 mi31 minN 09.00 miFair67°F66°F97%1016.1 hPa

Wind History from SBM (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmS3CalmS3S5S4S10S8S9S9S8S7S5S5S3Calm
1 day agoCalmCalmCalmCalmCalmS5SW5S4CalmCalmCalmS5SW5S5SW5SW4S7SE9S10S8S6S5CalmSW3
2 days agoCalmCalmCalmCalmCalmSW3S3S3S4SW5S3S5SW6SW6S12SW11SE6S9S12S8S8SE3E4NE4

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 (22,6,7,8)
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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.