Friday, August23, 2019 L-36.com


Marine Weather and Tides
Sheboygan, WI

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:02AMSunset 7:44PM Friday August 23, 2019 7:51 PM CDT (00:51 UTC) Moonrise 11:53PMMoonset 1:53PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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 Expires:201908240315;;097102 Fzus63 Kmkx 231943 Glflm Open Lake Forecast For Lake Michigan National Weather Service Milwaukee/sullivan Wi 243 Pm Cdt Fri Aug 23 2019 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 30.3 inches in southern ontario will slowly slide eastward into the weekend, reaching maine by Sunday morning at 30.4 inches. North to northeast winds will become easterly Saturday, with a southeast component by Sunday as the high moves on. Winds will be breezy at times through Sunday. Southeast winds and waves will pick up Monday between an approaching low and the departing high. A windy period also appears on tap toward the middle of next week with gusty westerly winds possibly approaching gales. Lmz080-669-671-673-675-777-779-870-872-874-876-878-240315- 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- 243 pm cdt Fri aug 23 2019 sheboygan wi to pentwater mi south...
Tonight..North winds 15 to 25 kt veering to east 10 to 20 kt. Waves 2 to 4 ft.
Saturday..Southeast winds 10 to 20 kt becoming northeast. Waves 2 to 4 ft.
Saturday night..Northeast winds 10 to 20 kt becoming southeast. Waves 2 to 4 ft.
Sunday..Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
Sunday night..Southeast winds 10 to 20 kt. Waves 1 to 3 ft building to 3 to 5 ft.
Monday..Southeast winds 10 to 20 kt becoming south 15 to 25 kt. Chance of showers in the afternoon. Waves 3 to 5 ft.
Monday night..South winds 15 to 25 kt becoming southwest. Showers likely. Waves 3 to 5 ft.
Tuesday..West winds 10 to 20 kt. Waves 3 to 5 ft.
Wednesday..West winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft.
LMZ669


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 232330
afdmkx
area forecast discussion
national weather service milwaukee sullivan wi
630 pm cdt Fri aug 23 2019

Update Added fog to wi river valley for after midnight.

Otherwise, sct-bkn cumulus thinning nicely, and should have mostly
clear conditions for much of the night. Boundary layer mixing just
off the surface should prevent much fog elsewhere late tonight.

Never the less, with 925h temps around 9-12 degrees, lowered
temps in susceptible eastern areas overnight, with a few spots
possibly getting into the 45 to 49 range.

Aviation(00z tafs) Vfr conditions to continue. May see some
late night shallow ground fog in low areas, and especially the wi
river valley. More sct to occasional bkn CU expected to develop
Saturday morning.

Prev discussion (issued 315 pm cdt Fri aug 23 2019)
short term...

today through Sunday night... Forecast confidence is high
big bubble, no trouble. Broad ridge of high pressure slowly moving
across the great lakes will lead to dry and pleasant conditions
through the weekend. Main forecast challenge is with cloud cover
as as the 23.18z rap soundings have been fairly dry, but lapse
rates right under the inversion are just steep enough to produce
a weakly unstable profile from about 925-800mb which in turn has
produced a decent CU field. There actually appears to be some lake
michigan influence with some slightly higher moisture content air
to produce some better clouds there. Should see something similar
through the weekend as a similar setup is in place through the
rest of the great lakes, but shouldn't see deep enough of lift to
produce any rain showers.

Long term...

Monday through Thursday night... Forecast confidence is medium
main shot at getting some rain over the next week comes on Monday
as a northern and southern stream system come together to create a
deep closed off trough in central canada by mid-week. Southerly
low level flow will help to push a more moist humid air mass into
southern wisconsin starting on Monday. This system comes in two
waves, the first being a southern stream system that pushes
northward across illinois on into the central great lakes region.

This could clip southeast wisconsin Monday morning, but the
23.12z ECMWF has no precipitation in southern wi while the 23.18z
nam GFS start streaming some light precipitation in across the
state. Thermal profiles are not overly impressive with warm
temperatures aloft and a skinny CAPE profile. The second wave
comes with the main mid level northern stream trough which pulls a
cold front through during the evening hours. Instability still
isn't looking very strong with this period but forcing could end
up being pretty decent due to the strengthening trough. Wind shear
looks good with this feature, but the instability may again be
the limiting factor.

After this cold front passes early on Tuesday, another round of
cooler air gets advected into the region on the southern periphery
of the deepening trough. 850mb temperatures will drop back down
into the 5-7c range through much of the rest of the week. The
23.12z ECMWF pulls a cold front through Thursday evening, so added
in some pops for that period as well.

Aviation(21z tafs)...

vfr conditions are in place across southern wisconsin and are
expected to remain that way through Saturday. Some few sct cumulus
are possible late Saturday morning into the afternoon, but should
stay at 4kft or higher. Winds will be gradually shifting from the
east-northeast to the east-southeast into tomorrow as a ridge of
high pressure drifts across the great lakes.

Marine...

north-northeast winds will gradually become more east to
southeasterly through the weekend as a ridge of high pressure
moves through the region. Some stronger south-southeasterly winds
are expected going into Monday as the next low pressure system
tracks through the dakotas. This low pressure system will then get
stuck in central canada and deepen going into mid-week. This
should lead to some stronger westerly winds across the great
lakes, particularly the northern portion of lake michigan going
into Wednesday. Can't rule out some gales for this period with
some colder air getting pulled in along with it.

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... mbk
tonight Saturday and aviation marine... mbk
Saturday night through Friday... 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi52 min NNE 11 G 12 66°F 1024.3 hPa (+0.0)53°F
45024 38 mi32 min NNW 14 G 18 67°F 70°F3 ft1023 hPa57°F
PWAW3 - Port Washington, WI 42 mi72 min NNE 8.9 G 14 68°F 1024.7 hPa
BSBM4 - Big Sable Point, MI 43 mi72 min N 15 G 18 68°F 1024.4 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi58 min N 6 G 9.9 67°F 51°F

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KSBM

Wind History from SBM (wind in knots)
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Last 24hr4--NE7E8NE8NE9NE11NE11NE10E6E3CalmN3CalmCalmCalmNW5CalmNE3--------N7
1 day agoW6--NW11NW6W10
G16
W12NW8NW6NW8NW7NW4CalmN6N5N7N6N7N5N3CalmN3CalmCalmNE3
2 days agoS5Calm3S5CalmS5S5S8S10SE5S3W3W3SW3W6W3SW4CalmS4SW3CalmCalmNW4W4

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.
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Wind Forecast for Milwaukee/Sullivan, WI (20,4,5,8)
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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.