Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Sister Bay, 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 5:25AMSunset 8:31PM Thursday July 20, 2017 5:47 PM CDT (22:47 UTC) Moonrise 2:37AMMoonset 5:48PM Illumination 8% 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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LMZ541 Green Bay South Of Line From Cedar River To Rock Island Passage And North Of A Line From Oconto Wi To Little Sturgeon Bay Wi- Green Bay South Of Line From Oconto Wi To Little Sturgeon Bay Wi- Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 325 Pm Cdt Thu Jul 20 2017
Tonight..SE wind 5 to 10 kts backing e, then veering S after midnight. Waves 2 ft or less. Patchy fog after midnight.
Friday..S wind 5 to 10 kts. Waves 2 ft or less. A slight chance of showers and Thunderstorms in the afternoon.
Friday night..SE wind 10 to 15 kts. Waves 2 ft or less. A chance of showers and Thunderstorms.
Saturday..E wind 5 to 10 kts. Waves 2 ft or less. A chance of showers and Thunderstorms.
LMZ541 Expires:201707210415;;559957 FZUS53 KGRB 202025 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 325 PM CDT Thu Jul 20 2017 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-541>543-210415-

7 Day Forecast for Marine Location Near Sister Bay, WI
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location: 45.19, -87.12     debug


Area Discussion for - Green Bay, WI
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Fxus63 kgrb 202240
afdgrb
area forecast discussion
national weather service green bay wi
540 pm cdt Thu jul 20 2017
updated aviation portion for 00z TAF issuance

Short term Tonight and Friday
issued at 250 pm cdt Thu jul 20 2017
drier air moving into the area from the west will
keep dry weather in the forecast through at least midday Friday.

Some ground fog possible later tonight with clear skies and light
winds. Lows will be around five degrees above normal in most
places.

Upper jet energy and a surface front will be approaching Friday
afternoon. Drier air in the northeast part of the forecast area
may hold off precipitation until late afternoon or early evening.

While severe potential is not zero, the best upper support and low
level moisture and convergence arrives a little later in the day,
so thunderstorms with strong winds and heavy rain appear more
likely during the evening hours.

Long term Friday night through Thursday
issued at 250 pm cdt Thu jul 20 2017
focus on this forecast revolves around thunderstorm chances and
potential for severe weather on Friday night into Saturday.

Friday night through Sunday... Ahead of low pressure over the plains,
a strengthening low level jet and upper divergence in the right rear
quad of a jet streak are expected to produce another thunderstorm
complex somewhere over southern minnesota to western wisconsin on
Friday evening. This thunderstorm complex is then expected to track
southeast across central and southern parts of the state. Models
appear more aggressive in surging the elevated instability into
northern wi than yesterdays runs, but wonder if they remain too
aggressive based on the convective trends from yesterday. As a
result, think spc's focus for severe weather south of the area
summarizes the severe weather threat well. Being on the northern
fringes, isolated severe thunderstorms and heavy rainfall appear
possible, mainly for central to east-central wi. Some showers are
expected to stick around for Saturday morning, mostly for eastern
wi. Then focus will shift towards northern wi for late in the
afternoon and evening when a potent shortwave trough approaches from
the northwest. If morning clouds do not hold back the heating
curve, scattered thunderstorms are expected to redevelop during peak
heating. Some storms could turn severe given the 0-6km bulk shear
values greater than 40 kts. The severe threat should diminish by
late in the evening as instability wanes. Then scattered showers
and isolated storms could linger through the rest of Saturday night
into Sunday with the upper troughing overhead. No significant
changes to temps.

Rest of the forecast... Quiet conditions will then move into the
region on Sunday night through Tuesday night as high pressure moves
across the area. As the high departs and southwest flow returns,
will see thunderstorm chances ramp up on Wednesday through Thursday
of next week. Temperatures will be going on a warming trend from
the low to mid 70s on Monday into the 80s by Wednesday and Thursday.

Aviation For 00z TAF issuance
issued at 540 pm cdt Thu jul 20 2017
good flying weather through the evening hours, with
scattered clouds between 3000 and 5000 feet and some mid clouds
above. Some ground fog is possible after 08z tonight, especially
where it has rained recently, and near lakes. A few places could
have ifr conditions for a few hours before sunrise. Good flying
weather for awhile Friday, but showers and thunderstorms are
possible later in the afternoon, especially over the western taf
sites. Therefore went with higher chances for thunderstorms out to
the west as a tempo group, with prob30 groups farther east and
north where arrival is less certain.

Grb watches warnings advisories
None.

Short term... ..Rdm
long term... ... Mpc
aviation... ... .Kurimski


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NPDW3 - Northport Pier at Death's Door WI 10 mi68 min W 1.9 G 5.1 86°F 1012.5 hPa
CBRW3 - Chambers Island, WI 13 mi68 min SW 1 G 5.1 86°F 1012.5 hPa
MN4 - 9087088 - Menominee, MI 26 mi48 min W 2.9 G 5.1 86°F 1012.6 hPa (-0.7)66°F
FPTM4 - Fairport, MI 38 mi68 min SSW 8 G 8.9 73°F 1012.2 hPa
45002 - N MICHIGAN- Halfway between North Manitou and Washington Islands. 39 mi58 min S 9.7 G 9.7 69°F 66°F2 ft1013.2 hPa (-0.7)
45014 43 mi48 min N 1.9 G 3.9 81°F 74°F1013.2 hPa (-0.4)

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Menominee - Marinette Twin County Airport, MI27 mi52 minVar 410.00 miFair86°F66°F51%1014 hPa

Wind History from MNM (wind in knots)
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Last 24hrS5--S8S8S5S5--S5S4SW3W3NW5CalmW4636--NW54W74NW74
1 day agoSW9--------N3N3N4N4NW4NW4NW5NW5N6N5N4N4CalmE6S7S8S5S9S8
2 days agoSW6S7S3CalmS4SW5SW4SW5SW6SW6SW6SW7SW6SW7SW85SW10SW7SW9SW10SW12
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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 (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.