Friday, May25, 2018 L-36.com


Marine Weather and Tides
Sheboygan, WI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:13AMSunset 8:21PM Friday May 25, 2018 1:46 PM CDT (18:46 UTC) Moonrise 4:15PMMoonset 3:31AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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- 838 Am Cdt Fri May 25 2018 Sheboygan Wi To Pentwater Mi South...
Rest of today..South winds 10 to 20 kt. Waves 2 to 4 ft.
Tonight..South winds 10 to 20 kt becoming southwest 10 to 15 kt after midnight. Chance of showers and Thunderstorms, mainly overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft.
Saturday..Southwest winds 10 to 15 kt becoming south by early afternoon. Waves 1 to 3 ft.
Saturday night..South winds 10 to 15 kt. Waves 1 to 3 ft.
Sunday..Southwest winds 10 to 15 kt becoming south. Waves 1 to 3 ft.
Sunday night..South winds 10 to 15 kt becoming southwest. Waves 1 to 2 ft.
Monday..Northwest winds 5 to 10 kt becoming north. Waves 1 to 2 ft.
Tuesday..Northeast winds 10 to 15 kt. Waves 1 to 3 ft.
LMZ669 Expires:201805252130;;505219 FZUS63 KLOT 251338 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 838 AM CDT Fri May 25 2018 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 30.2 inches over the Mid Atlantic shore will drift eastward this afternoon, while broad low pressure of 29.5 inches across the Canadian Prairies moves very slowly moves southeast. This low will reach the western Great Lakes by Saturday evening, weakening slightly to 29.7 inches as it does so. The low will further weaken to a trough of 29.8 inches and pass across the lake late in the weekend. High pressure of 30.1 inches will build from eastern Canada into the central and eastern Great Lakes by the middle of next week. LMZ080-669-671-673-675-777-779-870-872-874-876-878-252130-

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 251758 aab
afdmkx
area forecast discussion... Updated
national weather service milwaukee sullivan wi
1258 pm cdt Fri may 25 2018

Update
The forecast remains on track for this afternoon.

Aviation(18z tafs)
Vfr conditions will prevail through Saturday.

Could see an isolated shower storm through late this afternoon,
with a better chance for scattered storms this evening. Chances
currently look highest along and southwest of a line from the
wisconsin dells to madison to janesville... From mid evening into
early tonight as a shortwave moves through.

It should turn dry overnight into Saturday morning. Not much
forcing for storms on Saturday. Could see a storm or two try to
fire along the lake breeze in the afternoon.

Prev discussion (issued 943 am cdt Fri may 25 2018)
update...

warm temperatures well into the 80s are still on track for this
afternoon. There could be an isolated thunderstorm or two by late
afternoon, but overall still looks like the better chance for
storms will hold off until evening.

Marine...

could see a few wind gusts to around 20 knots today. Otherwise,
generally light winds and lower waves are anticipated the next
several days.

Prev discussion... (issued 548 am cdt Fri may 25 2018)
update...

no changes to the forecast.

Aviation(12z tafs)...

mainlyVFR conditions for the TAF period. MVFR conditions are
possible with any showers or thunderstorms. There is a small
chance for a brief shower or thunderstorm for south-central
wisconsin early this afternoon. Confidence is not high enough to
include in tafs. There is a better chance for thunderstorms for
south-central wisconsin after 6 pm and for southeast wisconsin
after 9 pm. Dry weather is expected after midnight. Southwest
winds of 15 to 20 knots are expected today with lighter winds on
Saturday.

Prev discussion... (issued 305 am cdt Fri may 25 2018)
short term...

today and tonight... Forecast confidence is medium...

showers and thunderstorm activity currently over northwest wisconsin
will weaken as it moves east, staying out of southern wi. The low
level jet will be weakening and there is lower instability to the
southeast.

There is a chance for showers and thunderstorms, mainly during
the evening. Meso models are trending later with a line of showers
and thunderstorms moving through during the late evening. This is
expected to develop across southern mn and NW wi along weak
surface convergence and within a weak shortwave. The surface
boundary stalls to our west keeping us within the southwest flow.

Regardless, there is plenty of CAPE with 20 knots of 0-6 km shear
to fuel thunderstorms. A few storms may be strong to severe,
mainly toward the west where there is greater instability. We will
lose instability as the evening GOES on and with other dynamics
lacking, showers and thunderstorms will struggle to make it to
southeast wisconsin.

Precip chances wind down after midnight.

Long term...

Saturday and Sunday... High forecast confidence.

Near record high temperatures are expected Saturday and Sunday,
with highs Saturday around 90, and in the low to mid 90s on
Sunday. A few showers may linger across the far eastern portion of
the forecast area Saturday morning, but otherwise, dry weather
should prevail. Heat indices on both days should top out in the
mid 90s.

Monday and Tuesday... Medium to high forecast confidence.

Upper level ridging will nose into the area from the southwest
during this time, keeping temperatures well above normal. A few
thunderstorms may try to sneak into the western portions of the
forecast area, but overall, conditions look dry. Highs Monday will
again be around 90, with slightly cooler (but still well above
average) highs in the upper 80s expected for Tuesday.

Wednesday through Friday... Low forecast confidence.

From Wednesday onward, much of the forecast will be dependent on
the evolution of the tropical disturbance currently located in the
gulf of mexico. Extended guidance differs as to whether this
feature will be shunted off to the east through the ohio valley,
or if it (and a considerable amount of moisture) will be absorbed
by the western trough as it lifts into the great lakes
Wednesday Thursday. A relatively cooler and wetter pattern would
prevail if that feature can make it this far north; otherwise,
above average temperatures and just scattered thunderstorms can be
expected to end the workweek.

Aviation(09z TAF update)...

mainlyVFR conditions expected through the TAF period. Scattered
showers and thunderstorms are expected during the evening,
especially for south-central wi. MVFR conditions are possible with
the showers. Southwest winds will dominate into Saturday.

Marine...

winds and waves will remain below small craft levels into early
next week. Southwest winds of 15 to 20 knots on Friday
will push wave to 2-3 feet this afternoon. This weekend,
temperatures will be in the upper 80s and dew points will reach
well into the 60s over land. As this air advects over the cool
lake, dense fog remains a possibility.

Climate...

temperatures will approach record levels over the next few days at
milwaukee and madison. Below are the record high temperatures and
year set for may 25-28...

milwaukee--
5 25--93 1911
5 26--91 1985
5 27--94 1911
5 28--93 1991
madison--
5 25--89 1977
5 26--91 1978
5 27--94 2012
5 28--92 1991

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... Ddv
today tonight and aviation marine... Marquardt
Saturday through Thursday... Boxell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi106 min W 12 G 15 83°F 1010.3 hPa (-1.2)63°F
45024 38 mi56 min SE 9.7 G 12 52°F 47°F2 ft1013.1 hPa49°F
PWAW3 - Port Washington, WI 42 mi66 min W 9.9 G 15 88°F 1011.9 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi76 min SSW 12 G 14 68°F 54°F
BSBM4 - Big Sable Point, MI 43 mi66 min S 14 G 19 66°F 1012.5 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan County Memorial Airport, WI35 mi53 minW 1010.00 miPartly Cloudy86°F64°F49%1010 hPa

Wind History from SBM (wind in knots)
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Last 24hrS8SE9S12
G18
S8S12S10S8S4S6SW3SW3SW6SW7S6SW5S3S5S7SW6W11W13W10W12W10
1 day agoS6SE8S9S8S5S5S4S4SW3S4SW4CalmSW3SW4CalmCalmS4CalmS5S5S6S7SE8SE9
2 days ago5Calm3NW4W6SE5CalmS3SW3SW3SW3SW5W4NW4W4W5W4W3W8W5SW6CalmE7S5

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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wmap_A
GOES Local Image of GreatLakes    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Milwaukee/Sullivan, WI (14,3,4,5)
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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.