Friday, November17, 2017

Marine Weather and Tides
Westfield, 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 6:57AMSunset 4:31PM Friday November 17, 2017 6:54 PM CST (00:54 UTC) Moonrise 6:49AMMoonset 5:32PM Illumination 1% Phase: Waning Crescent; Moon at 29 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
LMZ643 Sheboygan To Port Washington Wi- 506 Pm Cst Fri Nov 17 2017
.small craft advisory in effect until 4 am cst Saturday...
.gale warning in effect from Saturday morning through Saturday evening...
Tonight..South wind 15 to 25 knots with gusts to around 30 knots becoming southwest 10 to 15 knots with gusts to around 20 knots late in the evening, then becoming northwest 5 to 10 knots after midnight becoming north 10 to 20 knots early in the morning. Patchy fog through the night. Rain and slight chance of Thunderstorms through around midnight. Rain likely after midnight. Waves 7 to 9 feet subsiding to 3 to 4 feet.
Saturday..North wind 15 to 20 knots with gusts to around 25 knots becoming 15 to 25 knots with gusts to around 35 knots late in the morning, then becoming north 15 to 25 knots with gusts to around 35 knots early in the afternoon backing northwest with gusts to around 35 knots late in the afternoon. Rain likely in the morning, then chance of rain in the afternoon. Waves 3 to 4 feet building to 4 to 6 feet.
Saturday night..Northwest wind 15 to 25 knots. Gusts up to 30 knots. Mostly cloudy through around midnight then becoming partly cloudy. Waves 3 to 5 feet subsiding to 3 to 4 feet after midnight.
Sunday..Northwest wind 15 to 25 knots becoming 15 to 20 knots late in the morning, then becoming northwest 15 to 20 knots early in the afternoon backing west late in the afternoon. Mostly Sunny. Waves 2 to 4 feet subsiding to 1 to 2 feet in the afternoon.
LMZ643 Expires:201711180500;;565023 FZUS53 KMKX 172306 NSHMKX Nearshore Marine Forecast National Weather Service MILWAUKEE/SULLIVAN WI 506 PM CST Fri Nov 17 2017 For waters within five nautical miles of shore on Lake Michigan LMZ643-180500-

7 Day Forecast for Marine Location Near Westfield, WI
   Hourly   EDIT   Help
location: 43.93, -89.43     debug

Area Discussion for - Milwaukee/Sullivan, WI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kmkx 172350
area forecast discussion
national weather service milwaukee sullivan wi
550 pm cst Fri nov 17 2017

A cluster of thunderstorms currently in waukesha dodge washington
counties is moving to the northeast and should exit to lake
michigan within the next hour of so. Behind this heaviest area of
precip, light scattered rain showers have begun to blossom across
much of the CWA thanks to some low level warm air advection. Waa
will gradually diminish as the gradient slackens, weakening the
forcing for ascent and precip chances. Moreover, this weakening
flow combined with very most low levels will result in fog,
potentially dense in some locations.

Thoughts for snow potential tomorrow morning remains the same as
the previous discussion.

Aviation(00z tafs)
A cluster of thunderstorms currently in waukesha dodge washington
counties is moving to the northeast, likely missing mke. Behind
this heaviest precip, light scattered rain showers have begun to
blossom across much of southeastern wisconsin, and will continue
to do so for the next few hours.

Winds will drop off quite a bit later this evening, resulting in
fog. Uncertainty remains as to just how low the visbys will go.

However, ifr CIGS are likely across the southeastern wisconsin
through the night, potentially dipping to lifr for a few hours,
especially in the west.

A cold front will push through the area in the early morning,
swinging winds around to the northeast. This will force an
additional round of precipitation along with cooler temperatures,
resulting in a chance for a quick shot at some wet, slushy snow.

Any accumulations will likely be less than 1 inch and should melt
quickly given warm ground temperatures along with air
temperatures a few degrees above freezing.

Prev discussion (issued 257 pm cst Fri nov 17 2017)
short term... This evening through Saturday afternoon...

mesoscale models are showing the developing band of rain
approaching far northwest illinois gradually spreading east
northeast and becoming more widespread across the forecast area
into early this evening. This looks to be driven by an approaching
500 mb vorticity maximum. This will also be aided by focused warm
air and moisture advection. There may be a rumble of thunder or
two in the eastern counties as well into early this evening, so
added slight chances for thunder there. The rain should continue
into the evening.

There should then be a relative lull in the rain overnight, as the
cold front pushes through the area. An area of 850 mb to 700 mb
frontogenesis response then pushes into the southeastern half of
the forecast area Saturday morning. In addition, the main 500 mb
shortwave trough also pushes into the area. Thus, there will be
plenty of upward vertical motion and moisture available.

The forecast soundings are showing potential for a period of snow
to occur, as the saturated air column gets mostly below freezing.

The dendrite snow crystal growth zone also gets tapped during
this period. Thus, there could be a quick 1 2 to 1 inch or so of
slushy snow accumulation Saturday morning, before it changes back
to rain. This may impact travelers and hunters during this period.

There remains some uncertainty as to where exactly this band may
set up, with the mesoscale models showing the southeast half of
the area most affected. However, some of the far southeast may be
too warm for snow. For now, will message the potential for the
snow to occur with the slushy accumulations Saturday morning.

Gusty northwest winds are expected after the front moves through
Saturday, which will make for a raw day for hunters.

Long term... Saturday evening through next Friday...

expansive surface high pressure will push east across much of the
nation's midsection Sunday and Monday. Winds will become
southwesterly by Monday, setting the stage for a fairly nice day
with temperatures in the mid to upper 40s and partly to mostly
sunny skies. Another cold front will pass through the area
Tuesday, and while this frontal passage looks to generally be dry,
it will knock temperatures back into the low 30s for Tuesday and

Dry conditions then look to continue for thanksgiving day and the
following Friday, with highs in the upper 30s low 40s and lows in
the mid to upper 20s.

Aviation(21z tafs)...

rain showers will continue to move through the area this
afternoon. One area should become more widespread as it moves east
northeast into and across the area. There may be a rumble of
thunder into early this evening in eastern portions of the area.

Gusty south winds are expected to continue into the evening,
before weakening. Rain is then expected into the middle to late
evening hours, tapering off from west to east by or soon after

The cold front will move east through the area later tonight,
exiting the southeast counties between 09z and 12z Saturday. Gusty
northwest winds are then expected to develop soon after the
frontal passage, lingering through Saturday and into Saturday

A band of snow should affect portions of the area Saturday
morning. The best shot should be across the southeast half of the
area, which would include sheboygan, janesville, milwaukee,
waukesha, racine and kenosha.

A quick 1 2 to 1 inch of slushy accumulation is possible where
the snow can linger. Road temperatures suggest that pavement areas
may remain wet, but a quick burst of snow could still bring the
above mentioned slushy accumulation. There remains some
uncertainty on where exactly the band would set up, so stay tuned
for later forecast updates.


small craft advisory continues this afternoon and tonight for the
nearshore waters. Areas near sheboygan may see a few southerly
gusts approaching gale level this afternoon, before winds decrease
for a time later tonight.

A cold front will pass through the area shortly after midnight,
with winds becoming northwesterly and increasing substantially by
morning. A gale warning is in effect starting mid morning on
Saturday, continuing into Saturday night.

Beyond this weekend, fairly quiet weather is expected. Small
craft advisory conditions may again be met around Tuesday with
another frontal passage.

Mkx watches warnings advisories
Wi... None.

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

Gale warning from 9 am Saturday to midnight cst Saturday night
for lmz643>646.

Update... Bsh
tonight Saturday and aviation marine... Wood
Saturday night through Friday... Boxell

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
PWAW3 - Port Washington, WI 91 mi72 min S 15 G 20 42°F 1006.1 hPa
SGNW3 - Sheboygan, WI 93 mi55 min S 25 G 27 41°F 1004.1 hPa (-3.2)41°F

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wautoma, Wautoma Municipal Airport, WI10 mi59 minSSW 33.00 miLight Rain Fog/Mist36°F35°F97%1006.8 hPa

Wind History from Y50 (wind in knots)
Last 24hrE4SE6E6SE6SE7SE13S7SE10SE8SE7SE7SE8SE10S10SE13S13SE12S10
1 day agoNW16
2 days agoS3S5S5S7S7S7S6S4S8S4SW4S4SW7SW5SW6SW6W11

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
IR Satellite Image from GEOS

GOES Local Image of GreatLakes    EDIT

Wind Forecast for Milwaukee/Sullivan, WI (19,4,5,8)
      (on/off)   Help

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

Ad by Google

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 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 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.