Sunday, May28, 2017 L-36.com


Marine Weather and Tides
Sheboygan, WI

Version 3.4
What's New / NOTES
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 5:11AMSunset 8:24PM Sunday May 28, 2017 11:30 AM CDT (16:30 UTC) Moonrise 8:15AMMoonset 11:22PM Illumination 10% 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
    EDIT      (on/off)   Help
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- 841 Am Cdt Sun May 28 2017 Sheboygan Wi To Pentwater Mi South...
Rest of today..Variable winds less than 10 kt. Chance of showers and slight chance of Thunderstorms. Waves 1 to 2 ft.
Tonight..West winds 10 to 15 kt increasing to 10 to 20 kt. Slight chance of showers and Thunderstorms in the evening. Waves 1 to 3 ft.
Monday..Southwest winds 10 to 20 kt increasing to 15 to 25 kt... Then becoming west 10 to 20 kt late. Chance of showers in the afternoon. Waves 1 to 3 ft.
Monday night..West winds 10 to 20 kt. Waves 2 to 4 ft.
Tuesday..West winds 10 to 20 kt. Waves 2 to 4 ft.
Tuesday night..West winds 10 to 20 kt. Waves 1 to 3 ft.
Wednesday..West winds 10 to 20 kt. Waves 1 to 3 ft.
Thursday..Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Waves 2 to 4 ft.
LMZ669 Expires:201705282130;;344219 FZUS63 KLOT 281341 GLFLM OPEN LAKE FORECAST FOR LAKE MICHIGAN NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 841 AM CDT SUN MAY 28 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 29.7 INCHES OVER EAST CENTRAL ILLINOIS LATE THIS MORNING WILL PASS NEAR THE SOUTH END OF LAKE MICHIGAN TODAY AS IT LIFTS NORTHEAST INTO LOWER MICHIGAN BY THIS EVENING. ANOTHER LOW OF 29.6 INCHES OVER NORTHWEST ONTARIO WILL DEEPEN TO 29.4 INCHES NORTH OF THE LAKES BY EARLY MONDAY. THIS LOW WILL ONLY SLOWLY DRIFT EAST TO NEAR JAMES BAY THROUGH TUESDAY NIGHT...EVENTUALLY FILLING TO 29.6 INCHES ACROSS NORTHWEST QUEBEC BY LATE WEDNESDAY. MEANWHILE...HIGH PRESSURE OF 30.2 INCHES WILL BUILD ACROSS THE NORTHERN PLAINS TUESDAY AND SHIFT TO THE OHIO VALLEY THURSDAY. LMZ080-669-671-673-675-777-779-870-872-874-876-878-282130-

7 Day Forecast for Marine Location Near Sheboygan, WI
   Hourly   EDIT   Help
location: 43.71, -87.19     debug


Area Discussion for - Milwaukee/Sullivan, WI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kmkx 281508 aab
afdmkx
area forecast discussion... Updated
national weather service milwaukee sullivan wi
1008 am cdt Sun may 28 2017

Update
Rain will exit the east by late morning, with an area of clearing
moving in quickly behind it. Much of the remainder of the day will
be pleasant, with highs up around normal for late may. It does
still look like there will be a narrow line of showers and a few
storms developing this afternoon in the northwest, moving through
the forecast area late afternoon to early evening.

Marine
Westerly winds will be breezy memorial day through Wednesday, with
small craft advisory conditions possible each day. The offshore
flow will keep waves on the lower end.

Prev discussion (issued 814 am cdt Sun may 28 2017)
update...

aviation(12z tafs)...

expect area of showers and a few storms to move through the
eastern portions of the area over the next few hours, exiting by
later this morning. 2 mile visibilities and 2500 foot ceilings are
possible in the showers and storms. Otherwise, look forVFR
conditions into this afternoon.

There is another chance for showers and storms between 19z today
and 00z Monday. Small hail and gusty winds are possible in any
storms, but they will be scattered in nature. Diurnal cumulus
clouds around 5000 feet are expected this afternoon as well. Lake
breeze may try to flip the northwest to west winds to the
northeast near the lake this afternoon, but not enough confidence
to mention in lakeshore TAF sites.VFR conditions are forecast
into tonight, with westerly winds.

Prev discussion... (issued 330 am cdt Sun may 28 2017)
today and tonight... Forecast confidence is medium.

Area of showers continues to develop across the western counties
and points to the southwest and northeast of there. This is in
association with some low level frontogenesis response, as well as
with differential cyclonic vorticity advection associated with
approaching 500 mb shortwave trough.

These features will shift east through the area through the
middle to late morning hours, bringing this area of showers
through the area. This is supported by several mesoscale models.

Area forecast soundings support isolated thunderstorms as well.

The mesoscale models suggest that another broken band of showers
may shift east through the area this afternoon, with a secondary
cold front and perhaps some differential cyclonic vorticity
advection. It appears that dew points may lower somewhat this
afternoon, with westerly winds.

Still, area forecast soundings suggest several hundred j kg of
mean layer CAPE this afternoon. There is enough instability and
shear for some small hail and gusty winds with any storms this
afternoon. No severe weather is expected. Kept chance pops going
for the eastern 2 3 of the area this afternoon. Highs should be
around or in the lower 70s across most of the area.

Cold air advection tonight should bring drier air into the region,
and perhaps bring clearing skies to western portions of the area.

It may clear out more in the east than currently forecast. Lows
should remain in the lower to middle 50s.

Memorial day and Tuesday... Forecast confidence is medium
mid level low will move from lake superior across ontario. The
surface low will remain fairly stationary over ontario so westerly
flow will dominate. Several waves of vorticity will drop through the
region with more pronounced shortwaves moving through each
afternoon. Weak frontogenesis on Monday and a few hundred j of cape
by the more conservative ECMWF result in showers and thunderstorm
chances. The morning should start out with some sun, especially
in the south, but expect scattered afternoon cloud development.

There are precip chances again on Tuesday with weak warm
air advection, but very little instability so will hold of on
thunder mention. 850 winds increase to 25-30 knots during this time
and steep low level lapse rates will promote mixing and breezy west
winds both days.

Wednesday and Thursday... Forecast confidence is high.

Surface high pressure will slide south of the state bringing mainly
dry weather and sunny skies. Precip and thunder chances return
Thursday night with return flow, a push of warmer low level air, and
an approaching frontal boundary.

Friday through Sunday... Forecast confidence is low.

A frontal boundary looks to be over the region on Friday bringing
precip and thunder chances through the day. Then models diverge. The
ecmwf brings low pressure and precip through the region while the
gfs has high pressure. As a result, a lot of uncertainty with
temperatures too.

Aviation(06z tafs)...

high based sct showers will prevail for the early morning hours
until a second round of rain arrives mainly after 09z. This area
of showers and slight chances of tstorms will last through the
entire morning and will lead to CIGS of 1-3 kft and vsbys of 2-5sm
including light fog. The main area of rain will exit to the east
by afternoon with CIGS rising to sct-bkn050 along with good vsbys.

Small chances of showers and tstorms will remain however.

Marine...

there is the possibility of some fog development over the
nearshore waters of lake michigan this morning with the showers
moving through. Dew points will remain high enough where some fog
may form. For now, will hold off on a fog mention and watch area
web cameras to see if it does form.

A few thunderstorms are possible this morning with the passing
showers. Thunderstorms this afternoon may produce small hail and
gusty winds.

Gusty west winds are expected memorial day, with frequent gusts to
25 knots possible. The tight pressure gradient may linger into
Tuesday, with more frequent 25 knot gusts possible. A small craft
advisory may be needed for memorial day and Tuesday.

Mkx watches warnings advisories
Wi... None.

Lm... None.

Update... Ddv
today tonight and aviation marine... Wood
Monday through Saturday... Marquardt


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi30 min WNW 2.9 G 4.1 57°F 1007.2 hPa (-0.8)56°F
45024 38 mi30 min WNW 1.9 G 3.9 53°F 52°F1 ft1009.9 hPa (+0.9)52°F
PWAW3 - Port Washington, WI 42 mi50 min NNW 4.1 G 6 58°F 1008.8 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi42 min WSW 1.9 G 5.1 53°F 51°F
BSBM4 - Big Sable Point, MI 43 mi50 min NW 1.9 G 7 53°F 1008.8 hPa

Wind History for Ludington, MI
(wind in knots)    EDIT      (on/off)   Help
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last
24hr
W3
G6
W4
G8
W6
W3
G6
SW1
SW1
SW1
SW3
G7
--
NE1
NE2
--
E3
E2
S2
E3
SW2
SW3
S3
S1
SE2
SW1
G5
W7
W2
1 day
ago
W4
W5
G8
W4
G8
NW4
G8
W6
G9
NW5
G8
W5
G8
W2
SW1
E1
NE2
--
W2
--
SE1
NE1
E2
E2
E3
E3
--
W2
W3
SW3
G6
2 days
ago
N5
G11
N8
G11
NW6
G10
NW6
G9
NW6
G12
N6
G11
N6
G11
N8
G13
N5
G9
N4
N4
N3
N2
NE1
NW3
NW1
NW3
N1
NE2
--
E4
W5
W6
G10
W4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan, Sheboygan County Memorial Airport, WI35 mi37 minESE 47.00 miLight Rain58°F57°F97%1007.1 hPa

Wind History from SBM (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrS9S9S11S10S8S11S8S8S8S6S4SW5SW4W4NW5N3S3N4NW3NW5W9N4NW3SE4
1 day agoS5SE6SE7S4S5SE5S8S4CalmS3CalmS3CalmCalmSW4CalmCalmSW3CalmSW3Calm3SE4SE9
2 days agoNE12
G19
NE15
G20
NE11NE14NE13NE10NE14NE7NE6N3CalmN4N3N3CalmNW3CalmNE3CalmS3E3E4E6SE5

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Milwaukee/Sullivan, WI (12,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Green Bay, WI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.