Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Ephraim, 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 6:36AMSunset 6:53PM Wednesday September 20, 2017 8:02 AM CDT (13:02 UTC) Moonrise 6:50AMMoonset 7:23PM Illumination 0% Phase: New Moon; 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
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LMZ541 Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 413 Am Cdt Wed Sep 20 2017
.small craft advisory in effect from 1 pm cdt this afternoon through this evening...
Today..SE wind 10 to 15 kts veering S 15 to 25 kts in the late morning and afternoon. Waves 2 to 4 ft building to 3 to 5 ft in the afternoon. Patchy dense fog in the morning. A chance of showers and Thunderstorms in the afternoon.
Tonight..SW wind 10 to 15 kts veering N 5 to 10 kts after midnight. Waves 3 to 5 ft subsiding to 2 to 4 ft after midnight. A chance of Thunderstorms in the evening. A chance of showers. Patchy fog after midnight.
Thursday..NE wind 10 to 15 kts. Waves 1 to 3 ft. Partly Sunny.
Thursday night..SE wind 5 to 10 kts veering S 10 to 15 kts in the late evening and overnight. Waves 2 ft or less. Partly cloudy.
LMZ541 Expires:201709201615;;658269 FZUS53 KGRB 200913 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 413 AM CDT Wed Sep 20 2017 For waters within five nautical miles of shore on Lake Michigan LMZ541>543-201615-

7 Day Forecast for Marine Location Near Ephraim, WI
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location: 45.16, -87.18     debug


Area Discussion for - Green Bay, WI
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Fxus63 kgrb 201029
afdgrb
area forecast discussion
national weather service green bay wi
529 am cdt Wed sep 20 2017
updated aviation portion for 12z TAF issuance

Short term Today... Tonight... And Thursday
issued at 349 am cdt Wed sep 20 2017
convective trends today into this evening with a cold front
passage will be the primary issue. Early this morning, nws
minnesota offices were issuing severe thunderstorms warnings for
wisconsin counties adjacent to minnesota. Convection associated
with moisture convergence in the LLJ region ahead of the cold
front. Mu capes approaching 2500 j kg near the wi mn border.

Expect this convection to continue to work into NW wisconsin
early this morning then diminish as the band works ahead of the
best instability and deep layer shear over minnesota. Will need to
watch trends on the southern portion of the line east of msp to
see if this will reach north central wisconsin toward daybreak.

Meanwhile surface analysis early this morning is showing the
surface cold front is starting to lag back of this initial
convection. So while this first band diminishes, short range
progs redevelop convection midday over central and north central
wisconsin as the cold front works over the state and instability
axis shifts into the wisconsin. Still some potential of strong to
severe storms due to time of the day and available instability,
but the front is working into a ridge and upper heights do
increase late this afternoon into tonight and the upper jet
continues to lift northwest of the area. A SPC marginal risk of
storms continues over most of the area today and evening.

High pressure builds into the area late tonight into Thursday
morning in the wake of the cold front passage. Currently have a
dry forecast for Thursday, but it is possible a chance for
showers and storms will be needed due to 850 winds turn
southwesterly quickly in response to the building heights and a
frontal boundary may initially be close to east central and
central wisconsin starting Thursday morning.

Long term Thursday night through Tuesday
issued at 349 am cdt Wed sep 20 2017
the main story for the beginning of the period will be unseasonably
warm temperatures Thursday through the weekend. The warmth should
peak Friday through Sunday, with average temperatures running 15
to 25 degrees above normal each day. High temperatures will be
close to the record high for each day. Temperatures by early next
week will return closer to normal.

Weak high pressure will slide east of the are Thursday night.

Return flow 850mb warm advection noted which could trigger an
isolated shower or thunderstorm across northern wisconsin.

Continued with small chances of rain for the above mentioned
reasoning. Very warm and increasing humidity expected on Friday
with highs well into the 80s. A few 90 degree readings are
possible across central into northeast wisconsin. So far this
year, green bay, rhinelander and wausau have not reported a 90
temperature so far this year. The warmth then continues through
Sunday. Shower and thunderstorm activity north and west of the
state may spill over into far north-central wisconsin at times
Saturday afternoon into Sunday evening.

Rain chances will be on the increase Monday into Tuesday, although
Tuesday will probably be the better day for rain. The two tropical
systems (tropical storm jose and hurricane maria) moving northward
off the coast of the united states will slow the overall weather
pattern down across north america.

Aviation For 12z TAF issuance
issued at 529 am cdt Wed sep 20 2017
moisture working northward on south winds will produce
patchy ifr clouds and fog over eastern wisconsin early this
morning. Mainly MVFR CIGS are expected later today into this
evening as a cold front with scattered showers and storms tracks
over the area. A few storms may contain large hail and gusty
winds. Depending on how quickly the front departs tonight
followed with a decreasing cloud trend and diminishing wind, low
stratus and fog may begin to spread into north central and
central wisconsin late tonight.

Grb watches warnings advisories
Beach hazards statement from 1 pm cdt this afternoon through
this evening for wiz022-040-050.

Short term... ..Tdh
long term... ... Eckberg
aviation... ... .Tdh


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NPDW3 - Northport Pier at Death's Door WI 14 mi83 min SSE 8.9 G 14 65°F 1013.2 hPa
MN4 - 9087088 - Menominee, MI 22 mi45 min SE 16 G 18 65°F 1011.9 hPa64°F
45014 40 mi33 min SSE 14 G 16 66°F 66°F1011.8 hPa
FPTM4 - Fairport, MI 42 mi83 min SSE 11 G 13 64°F 1013.9 hPa
45002 - N MICHIGAN- Halfway between North Manitou and Washington Islands. 43 mi73 min S 12 G 14 65°F 65°F2 ft1014.7 hPa (-0.0)

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Door County Cherryland Airport, WI24 mi67 minSE 91.75 miFog/Mist64°F63°F96%1015 hPa
Menominee - Marinette Twin County Airport, MI24 mi67 minS 104.00 miFog/Mist65°F63°F93%1014.1 hPa

Wind History from MNM (wind in knots)
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Last 24hrE11E10SE9SE7E8--E8E6SE7E7E7E5E7E3E5E4CalmCalmCalmCalmS4S6S8S10
1 day agoNE5N4E3E7E9E94SE6E7E7E9SE7E5E5E4E7E4N5N6NE7NE6E8E8E7
2 days agoSW3SW3SW6W5W735663CalmCalmCalmCalmW3E10E6NE5N5N3NW3CalmN3N4

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 Green Bay, WI (9,2,3,4)
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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.