Thursday, March30, 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 6:32AMSunset 7:17PM Thursday March 30, 2017 3:21 PM CDT (20:21 UTC) Moonrise 8:22AMMoonset 10:29PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 307 Pm Cdt Thu Mar 30 2017 Sheboygan Wi To Pentwater Mi South...
Tonight..Northeast winds to 30 kt. Rain showers likely. Waves 4 to 7 ft occasionally to 9 ft.
Friday..North winds to 30 kt. Chance of rain in the morning. Waves 6 to 9 ft occasionally to 11 ft.
Friday night..North winds to 30 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 11 ft subsiding to 3 to 5 ft occasionally to 7 ft.
Saturday..North winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
Saturday night..North winds 5 to 10 kt veering to east. Waves 1 to 2 ft.
Sunday..Southeast winds 5 to 10 kt increasing to 10 to 15 kt. Chance of rain in the afternoon. Waves 1 to 3 ft.
Sunday night..Southeast winds 10 to 20 kt. Rain likely. Waves 1 to 3 ft.
Monday..East winds 10 to 15 kt backing to north 10 to 20 kt. Waves 1 to 3 ft.
Tuesday..North winds 10 to 20 kt. Waves 1 to 3 ft.
LMZ669 Expires:201703310315;;328535 FZUS63 KLOT 302007 GLFLM OPEN LAKE FORECAST FOR LAKE MICHIGAN NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 307 PM CDT THU MAR 30 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. LOW PRESSURE OF 29.5 INCHES OVER CENTRAL ILLINOIS WILL MOVE EAST INTO OHIO OVERNIGHT...BEFORE REDEVELOPING OFF THE ATLANTIC COAST FRIDAY NIGHT. HIGH PRESSURE OF 30.2 INCHES WILL BUILD SOUTHEAST ACROSS THE UPPER MISSISSIPPI VALLEY AND WESTERN GREAT LAKES REGION FRIDAY AND FRIDAY NIGHT. THE HIGH PRESSURE RIDGE WILL MOVE EAST OF LAKE MICHIGAN LATE SATURDAY NIGHT...WHILE AN AREA OF LOW PRESSURE OF 29.4 INCHES DEVELOPS ACROSS MANITOBA BY EARLY SUNDAY. THIS LOW WILL FILL SLIGHTLY TO 29.5 INCHES AS IT PASSES NORTH OF LAKE SUPERIOR MONDAY...WHILE ANOTHER LOW OF 29.5 INCHES MOVES ACROSS THE LOWER MISSISSIPPI VALLEY. WEAK HIGH PRESSURE OF 30.0 INCHES WILL MOVE ACROSS THE WESTERN LAKES TUESDAY...AHEAD OF ANOTHER LOW PRESSURE SYSTEM MOVING INTO THE MIDWEST WEDNESDAY. LMZ080-669-671-673-675-777-779-870-872-874-876-878-310315-

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 301648
afdmkx
area forecast discussion
national weather service milwaukee/sullivan wi
1148 am cdt Thu mar 30 2017

Aviation(18z tafs) With low pressure south of wi we are on the
rainy, cloudy and cool north side of this system. Plenty of ifr
ceilings with most vsbys MVFR. Progs take the low to the east and
keep us reinforced in this regime this period. So expect
cigs/vsbys to be fairly consistent. As low tracks more to the east
the winds will turn more from the east to the northeast and
eventually north. Rain coverage decreases into Friday with some
improvement in ceilings as well though enough llvl rh lingers to
keep the cloud cover locked in place with a chilly nne wind.

Pc

Prev discussion (issued 941 am cdt Thu mar 30 2017)
marine... No change to the small craft advisory. A tight pressure
gradient persists around low pressure centered in missouri. The
ene wind regime generating gusts to 20 knots plus and expect some
gusts to possibly reach the 25 to 30 knot range at times. Winds
will start turning more to the NE and N tonight into Friday and
remain gusty with high waves being generated.

Pc
prev discussion... (issued 621 am cdt Thu mar 30 2017)
update...

aviation(12z tafs)...

rain will persist through most of the day in the east today, and
will be on and off in the west. Rain chances will continue this
evening into Friday morning, but overall amounts and spatial
coverage will be less for this period.

Mainly ifr ceilings are expected today into Friday morning,
though MVFR ceilings will be possible at times. Visibilities will
bounce around with the rainfall, ranging from 6 miles or better in
light rain down to around 2 miles in moderate rain.

Prev discussion... (issued 330 am cdt Thu mar 30 2017)
short term...

today and tonight... Forecast confidence is high:
low pressure will slowly move by to the south today and tonight,
bringing continued rain to southern wisconsin. The current slug of
rain should wind down by mid morning, with less rain rain late
morning into early afternoon. Could see a little snow mix in across
the north early this morning, but most places will stay rain only.

Kept a slight chance of thunder in the southeast this morning per
upstream conditions and model instability.

Models then show another round of steady rain moving in mid to late
afternoon, with the highest amounts occurring in the eastern
forecast area. Rain chances will then hang on during the evening and
overnight hours, though amounts will be less than during the day.

Stuck fairly close to a blend of model 2 meter temps for today and
tonight given the clouds and widespread precip. Highs will be on the
order of 10 degrees below normal today, which will feel even cooler
when you factor in the rain and breezy east winds.

Long term...

Friday... Forecast confidence is medium.

The air will be gradually drying out from top to bottom on Friday,
so clouds are expected to linger through the day, and there
should be some light drizzle at least in the morning hours. Winds
will continue to be brisk out of the north-northeast, so high
temperatures in southeast wi will only be in the lower 40s. Inland
temps will be in the upper 40s.

Saturday... Forecast confidence is high.

Drier air with high pressure building into the region on Saturday
will help to scour out the clouds for a short period of time.

Light winds and some sunshine will allow highs to 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 to lower mississippi river valley over the weekend. This upper
trough is expected to phase with a northern stream upper trough
tracking across southern canada. Southern wi has a decent chance for
light rain Sunday into Sunday night, and perhaps Monday morning.

Tuesday night through Thursday... Forecast confidence is medium.

Yet another upper low is expected to cross the mountains early next
week. Precip with this proposed compact low could spread into
southern wi as early as Tue night. Its slow movement could bring
a decent amount of rain to our area through Thursday night. This
system looks like all rain for southern wi at this time, but if it
shifts south, we will have a chance at snow.

Aviation(06z tafs)...

not much change to the TAF forecast. Look for CIGS to gradually
lower to MVFR through late tonight, then to ifr conditions after 12z
this morning continuing through the remainder of the TAF period. A
windy and wet day is expected today. Winds will be easterly at 15 to
20 knots with gusts to 30 knots. Widespread rain will diminish this
afternoon into the evening, though a chance for light rain will
linger overnight into Friday morning.

Marine...

gusty winds and higher waves are likely into Friday night as low
pressure moves through the region. See no reason to change the
timing of the current small craft advisory.

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

Lm... Small craft advisory until 4 am cdt Saturday for lmz643>646.

Today/tonight and aviation/marine... Ddv
Friday through Wednesday... Cronce


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi82 min NNE 20 G 22 37°F 1009.8 hPa (-2.6)37°F
PWAW3 - Port Washington, WI 42 mi42 min NNE 14 G 21 39°F 1008.8 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi52 min E 12 G 18 41°F 36°F
BSBM4 - Big Sable Point, MI 43 mi42 min ENE 16 G 24 40°F 1010.5 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 mi29 minNE 18 G 265.00 miLight Rain Fog/Mist and Breezy37°F35°F93%1008.5 hPa

Wind History from SBM (wind in knots)
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Last 24hrNE11NE16NE12NE14
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N7NE12NE11NE14NE9E8E9E9E11E11E14E13E14E17NE16
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1 day agoE9E7NE8NE6NE4NE4CalmSW3CalmCalmCalmNE4NE7NE8NE6NE4NE6NE8NE11NE8NE10NE12NE11NE11
2 days agoE6E7NE8E7NE6NE4N3CalmNW3NW3N3N4NW5N6N6N5N5NE8NE8NE7NE6NE10NE11NE12

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 (16,3,4,5)
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Ground Weather Radar Station Green Bay, WI
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weather_mapweather_map weather_map

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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.