Friday, December15, 2017 L-36.com


Marine Weather and Tides
Oostburg, 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 7:16AMSunset 4:16PM Friday December 15, 2017 5:45 PM CST (23:45 UTC) Moonrise 5:34AMMoonset 4:00PM Illumination 6% Phase: Waning Crescent; Moon at 27 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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LMZ643 Sheboygan To Port Washington Wi- 505 Pm Cst Fri Dec 15 2017
.small craft advisory in effect until 6 pm cst this evening...
Tonight..West wind 10 to 15 knots becoming northwest 5 to 10 knots late in the evening, then veering north after midnight veering northeast 5 to 15 knots early in the morning. Chance of snow late in the evening. Snow likely after midnight, then snow early in the morning. Waves around 1 foot.
Saturday..Northeast wind 10 to 15 knots veering east with gusts to around 20 knots in the afternoon. Snow likely in the morning. Waves 1 to 2 feet building to 3 to 4 feet in the afternoon.
Saturday night..East wind 10 to 15 knots. Gusts up to 20 knots. Cloudy. Waves 3 to 4 feet.
Sunday..East wind 10 to 15 knots veering southeast late in the morning, then easing to 5 to 10 knots early in the afternoon veering southwest late in the afternoon. Cloudy. Waves 3 to 4 feet. Wave heights are for ice free areas.
LMZ643 Expires:201712160500;;950119 FZUS53 KMKX 152305 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 505 PM CST Fri Dec 15 2017 For waters within five nautical miles of shore on Lake Michigan LMZ643-160500-

7 Day Forecast for Marine Location Near Oostburg, WI
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location: 43.63, -87.67     debug


Area Discussion for - Milwaukee/Sullivan, WI
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Fxus63 kmkx 152343
afdmkx
area forecast discussion
national weather service milwaukee sullivan wi
543 pm cst Fri dec 15 2017

Update
An initial band of light snow associated with warm air advection
is lifting east northeast through the area this evening.

Visibility isn't restricted below 8-9 miles, so just an area of
flurries at this time. It's still expected to intensify later
tonight and mainly north of milwaukee and madison.

Aviation(00z tafs)
MVFR CIGS cover most of southern wisconsin at the start of the taf
period. Look for the band of light snow across the area early on
to gradually lift north through the night. The TAF sites are only
expected to see a dusting with less than 1 4 inch of snow, or
less... And mostly before 06z Saturday. The better accumulating
snow will be located to the north and become more
widespread intense in that area later this evening and through the
overnight hours.VFR CIGS should return to the TAF sites between
about 05-07z Saturday and remain there through the remainder of
the TAF period. Look for light and variable winds to become
easterly after sunrise on Saturday.

Prev discussion (issued 303 pm cst Fri dec 15 2017)
short term...

tonight and Saturday... Forecast confidence high.

As the upper level flow backs in the wake of the passing upper
trough this morning, low to mid level warm advection will develop
with a focused area of sfc-850 mb frontogenesis over the nrn
forecast area. Expect some very light snow from madison to
milwaukee in the evening that will then shift nwd and become a
little heavier toward central wi for late evening into Sat am.

Total snow accums of 1-2 inches for fond du lac and sheboygan
counties with a dusting farther south from madison to milwaukee.

Saturday night through Tuesday night... Forecast confidence
medium.

L
ely sfc flow will prevail Sat nt into sun. A shortwave trough will
track from the SRN great plains through the ohio river valley for
sun-sun eve. The NRN extent of the light rain and snow may reach
the wi il border but only slight chances for now. A quasi-zonal
flow will continue through the middle of the week with above
normal temps. A dry cold front, from a strong low well north in
canada, will pass on Tue with high pressure to follow for Tue nt.

Long term... Wednesday through Friday... Forecast confidence
low to medium.

High pressure will gradually move ewd on Wed with temps several
degrees cooler from Tue but still above normal.

A large upper trough will dig sewd from the pacific NW Tue nt,
becoming a cut off upper low over the desert SW by fri. A vorticity
maximum from the digging upper trough will break away and move
newd to the great lakes ahead of a large polar trough digging
sewd from canada. Thus, a sfc trough cold front will move sewd
across the region with mild air and some rainfall ahead of it and
some snowfall afterward. A wave of low pressure along the trough
is expected with the chances of strong cyclogenesis low at this
time. Polar air will return to the region at the end of the
week with arctic air possible if more of an intrusion occurs. The
cold would continue through christmas day.

Aviation(21z tafs)... CIGS of 1-3 kft will continue ewd across
srn wi with periodic flurries through late afternoon. CIGS of 1-3
kft will then prevail tnt as light snow develops and shifts nwd.

Vsbys with the snow will range from 1-3 miles with the longest
duration of snow and reduced vsbys toward central wi. The cigs
will rise above 3 kft from madison to milwaukee and swd by
midnight while CIGS will remain low to the north where the light
snow will continue and accumulate. The snow will taper Sat am but
with CIGS remaining low north of madison and milwaukee through the
day.

Marine... Brisk wly winds will subside by early evening thus the
small craft advisory will be allowed to expire at 6 pm cst. Modest
ely winds will then prevail for Sat into Sun am. Waves of 3-4 feet
are expected mainly north of north point lighthouse.

Mkx watches warnings advisories
Wi... None.

Lm... Small craft advisory until 6 pm cst this evening for lmz643>646.

Update... Davis
tonight Saturday and aviation marine... Gehring
Saturday night through Friday... Gehring


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 8 mi45 min WNW 5.1 G 6 22°F 1011.4 hPa (+0.6)12°F
PWAW3 - Port Washington, WI 20 mi65 min NW 1.9 G 2.9 25°F 1011.9 hPa
MLWW3 - Milwaukee, WI 42 mi35 min SW 8 G 8.9 31°F

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan County Memorial Airport, WI14 mi52 minWNW 310.00 miOvercast19°F10°F71%1011.5 hPa

Wind History from SBM (wind in knots)
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Last 24hrCalmS3SW5SW6SW6SW7S7SW7SW7SW5W9W10
G18
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1 day agoN12
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N9NW8NW6NW7NW6NW6NW5W3NW5W5W5NW4W5W8W5W7W5SW4
2 days agoNW3W4NW8NW4CalmW4SW4S4S6SE4SE3SE3S8S13
G20
S9SE9SE9S10
G19
S8SW4CalmN8NE15NE13

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 (18,4,5,8)
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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.