Wednesday, December13, 2017 L-36.com


Marine Weather and Tides
Green 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 7:19AMSunset 4:14PM Wednesday December 13, 2017 4:54 AM CST (10:54 UTC) Moonrise 3:36AMMoonset 2:59PM Illumination 25% Phase: Waning Crescent; Moon at 25 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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LMZ522 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- 443 Am Cst Wed Dec 13 2017
.small craft advisory in effect from noon cst today through late tonight...
Today..SE wind 10 to 15 kts backing ne and increasing to 15 to 25 kts in the afternoon. Waves building to 3 to 5 ft on the bay and 5 to 7 ft on the lake. Snow.
Tonight..N wind 15 to 25 kts backing nw 10 to 15 kts after midnight. Waves decreasing to 2 to 4 ft on the bay and 4 to 6 ft on the lake. Light snow in the evening.
Thursday..W wind 10 to 15 kts. Waves subsiding to 1 to 3 ft. Partly Sunny.
Thursday night..W wind 10 to 15 kts. Waves 2 ft or less. A chance of flurries in the evening, then a chance of snow showers after midnight.
LMZ522 Expires:201712131715;;824289 FZUS53 KGRB 131043 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 443 AM CST Wed Dec 13 2017 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-541>543-131715-

7 Day Forecast for Marine Location Near Green Bay, WI
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location: 44.52, -87.98     debug


Area Discussion for - Green Bay, WI
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Fxus63 kgrb 131024
afdgrb
area forecast discussion
national weather service green bay wi
424 am cst Wed dec 13 2017
forecast discussion for routine morning forecast issuance

Short term Today... Tonight... And Thursday
issued at 424 am cst Wed dec 13 2017
two jet streaks are combining to produce a clipper like system
that will bring snow to the area. The stronger of the two was
racing southeast from south dakota at 10z, while the other was
still north of the canadian border east of lake winnipeg. The two
interact with each other more as the day GOES on, resulting in the
strengthening of the surface low as it moves across southern
wisconsin towards north indiana today.

The models have been tracking this system further north with time,
which seems reasonable based on the latest radar returns and surface
pressure falls. We decided to add some counties in northern wisconsin
to the winter weather advisory after discussion with marquette.

Much of the snow with this system will fall during the morning
hours as a coupling of the two upper jets produce strong vertical
motion. As the surface low moves into southern wisconsin later
today low level winds shift to the northeast and help produce lake
enhanced snow for eastern wisconsin through early evening. Blowing
and drifting snow is possible near the lake and bay during the
afternoon and evening hours.

Model precipitation forecasts and snow ratios suggest that parts of
east central wisconsin could get six inches or more of snow, but we
decided to leave the winter weather advisory in place versus a warning,
as this system is more complex than the typical clipper system making
it difficult to determine where this heavier snow might occur.

Long term Thursday night through Tuesday
issued at 424 am cst Wed dec 13 2017
500mb ridge across western north america with downstream troughing
across eastern canada into the northern united states will dominate
the weather pattern through the end of the work week. The pattern
is expected to flatten some over the weekend with a 500mb trough
moving across the central united states early next week.

The next in a series of upper level disturbances will sweep across
the area Thursday into Thursday night. The chance of lake effect
snow showers will continue Thursday across the far north. Did
bring in a chance of flurries over central and the remainder of
north-central wisconsin Thursday afternoon. Expanded the chances
of snow showers or flurries eastward across the entire area
Thursday night. There may be a light coating of snow that could
cause some slick spots on area roads, bridges and sidewalks.

The cold cyclonic flow will lead to more cloudiness, along with
the chance of lake effect snow showers across the far north with
the chances of flurries over the remainder of the region on Friday.

For Friday night, the models are split between a dry forecast and
the chances of more flurries or light snow. Continued the chances
of flurries for most areas outside the snowbelt region of northwest
vilas county. Next clipper could bring an accumulating snow to the
region Saturday into Saturday night. Beyond Saturday night, there
is a chance of light snow Monday night into Tuesday across the
entire region. The chances of lake effect snow showers continues
at times Sunday through Tuesday across the far north. Temperatures
return closer to normal over the weekend with temperatures at or
slightly above normal early next week.

Aviation For 06z TAF issuance
issued at 856 pm cst Tue dec 12 2017
flight conditions will vary considerably early tonight as the lead
snow band shifts east across the area and weakens. Conditions are
still expected to deteriorate rapidly late tonight as snow
increases across the area. Anticipate ifr and occasional lifr
conditions Wednesday as the main snow band moves through.

Grb watches warnings advisories
Winter weather advisory until 6 pm cst this evening for
wiz010>013-018>021-030-031-035>039-045-048-049-073-074.

Winter weather advisory until 9 pm cst this evening for wiz022-
040-050.

Short term... ..Rdm
long term... ... Eckberg
aviation... ... .Skowronski


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWNW3 - 9087069- Kewaunee, WI 26 mi54 min S 8 G 12 17°F 1005.6 hPa (-3.5)
MN4 - 9087088 - Menominee, MI 45 mi54 min SSE 9.9 G 12 18°F 1005.6 hPa (-3.7)10°F

Wind History for Kewaunee MET, WI
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NW2
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N14
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G26
NW16
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SW5
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NW9
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G15
NW6
G11
NW8
G13
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G13
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G8
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G11
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G12
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N5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Green Bay, Austin Straubel International Airport, WI8 mi61 minESE 74.00 miLight Snow16°F9°F74%1006.6 hPa

Wind History from GRB (wind in knots)
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Last 24hrNW13NW10NW12N10NW12NW12
G18
N13
G21
NW10NW11W9W10NW10NW3SW3W6W6W4W4SW3SW4S3S4SE6SE7
1 day agoSE5S6S5S9S7S8S6S5SW4CalmNW6NW7NW9NW8NW10NW18
G26
N20
G27
N12
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N13
G28
N15
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G23
NW14NW12NW14
2 days agoSW5W4SW3W4W5NW7NW10NW9NW7NW12NW7NW6NW7N7NW6N5N3NE7NE4NE4NE3CalmSE4SE5

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 (5,6,7,8)
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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.