Wednesday, June20, 2018 L-36.com


Marine Weather and Tides
Green Bay, WI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:05AMSunset 8:42PM Wednesday June 20, 2018 2:13 PM CDT (19:13 UTC) Moonrise 1:05PMMoonset 1:11AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 959 Am Cdt Wed Jun 20 2018
Rest of today..NE wind around 5 kts veering se in the afternoon. Waves 2 ft or less. Partly cloudy then clearing.
Tonight..E wind 5 to 10 kts shifting ne and increasing to 10 to 20 kts around midnight. Waves 1 to 3 ft. Clear.
Thursday..NE wind 10 to 20 kts early, diminishing to 10 to 15 kts in the afternoon. Waves 1 to 3 ft. Sunny.
Thursday night..NE wind 10 to 15 kts. Waves 2 ft or less. Clear.
LMZ522 Expires:201806202230;;833268 FZUS53 KGRB 201459 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 959 AM CDT Wed Jun 20 2018 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-202230-

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 201739
afdgrb
area forecast discussion
national weather service green bay wi
1239 pm cdt Wed jun 20 2018
updated aviation portion for 18z TAF issuance

Synopsis
Issued at 401 am cdt Wed jun 20 2018
a few sprinkles and showers across mainly the south this morning,
otherwise dry with seasonable temperatures for the rest of the
work week. Although rain chances will return this weekend, most of
the weekend will be dry with seasonable temperatures continuing.

The upper flow across north america will remain split with a
stronger branch of the flow across canada and a weaker branch
across mainly the northern conus. A well defined frontal system
will remain stretched out along the southern band of the
westerlies, with very moist air in place along the front. Energy
progressing east across the CONUS will be suppressed south of the
area as the northern stream trough over eastern canada amplifies a
little the next couple days. Then the forecast area will remain
primarily between the main branches of the flow until some
consolidation begins late in the weekend or early next week.

The main reservoir of very moist unstable air will remain far
enough south of the area throughout the period to allow for just
scattered light precipitation events and below normal totals for
the period. That will allow for an opportunity to dry out after
last weekend's heavy rains. Temperatures should remain fairly
close to seasonal normals throughout the period.

Short term Today... Tonight... And Thursday
issued at 401 am cdt Wed jun 20 2018
still having trouble getting the precipitation shifted completely
out of the area. Despite the surface front being well south of the
area, the forecast area remains within the frontal zone aloft.

Given plentiful moisture and a little elevated instability,
weakly frontogenetic flow was sufficient to generate isolated-
scattered sprinkles and showers again this morning. Those will be
most plentiful south and west of the area, but needed to carry a
mention of them through the morning for about the southern 1 3 of
the forecast area. Widespread clouds were preventing fog
formation, so removed that from the forecast for early today.

Drier air will edge southwest today, but guidance indicated mid-
level clouds will persist across the southwest portion of the
area all day. Started with a broad-based blend of guidance
products for MAX temps, then edged the southwest down a bit due to
the clouds.

Quite a bit of cloudiness along with scattered showers and some
thunderstorms were accompanying a frontal system dropping south
across ontario early this morning. Low-level convergence along
the boundary will decrease substantially as the front begins to
shift south into the area late today, where the gradient will
already support northeast low-level flow. Bumped cloudiness up a
little over the north northeast late today into this evening, but
kept forecast dry.

The front should wash out on Thursday, as the slightly cooler and
drier canadian air behind the front pushes across the area on
northeast winds. Raised winds some near the lake and bay, and
edged temps back a little in those areas as well.

Long term Thursday night through Tuesday
issued at 401 am cdt Wed jun 20 2018
the ECMWF and GFS remain in relatively good agreement through this
part of the forecast and will continue to use a blend of their
solutions. Forecast concerns mainly revolve around precip chances
this weekend.

Thursday night through Friday night... Low pressure will be slowly
moving east across the central mississippi valley on Thursday night.

The track appears to have shifted slightly further north compared to
solutions 24 hours ago, but the northern extent of the cirrus is
projected to barely reach into central wi, so will keep a dry
forecast intact. Models then start to disagree slightly when to
start lifting the low to the northeast. The latest solutions track
the low across central il on Friday before turning the system to the
northeast on Friday night. With the system pretty far south and
ample dry air present through the column, Friday looks to remain
dry. Precip chances have diminished some for Friday night as a
further east track keeps most of the precip for the central and
eastern great lakes. However, will keep a small chance mention for
northeast wi where will be on the western fringe of the system.

Little changes to temps over the period.

Rest of the forecast... As the system moves away from the region,
weak upper troughing will be moving across the region on Saturday
and Sunday. Should see partly to mostly cloudy conditions at times,
through precip chances look too ill-defined for much of a precip
threat. Finally, passage of a cold front will bring clearing skies
for the latter half of Sunday into Monday. The next chance of
widespread precip does not look to arrive until next tue.

Aviation For 18z TAF issuance
issued at 1239 pm cdt Wed jun 20 2018
a few very light rain showers or sprinkles may hit the mtw taf
site early this afternoon, otherwise dry conditions are expected
over the next 24 hours. CIGS across over parts of central and
east-central wi continue to run at MVFR and this should linger
through the afternoon before drier air arrives tonight and allows
vfr conditions to prevail over all of northeast wi. A system over
the central plains is forecast to head toward the mid-ms valley on
Thursday with its northern periphery of precipitation approaching
central east-central wi. The thought here is that high pressure
sinking south into southern ontario will feed enough dry air to
suppress any measurable rain to southern wi. While late night fog
may be an issue, not enough confidence to lower vsbys down, thus
anticipateVFR conditions to rule through tonight Thursday.

Grb watches warnings advisories
None.

Synopsis... ... .Skowronski
short term... ..Skowronski
long term... ... Mpc
aviation... ... .Kallas


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45014 23 mi14 min NNE 5.8 G 7.8 70°F 71°F1012.9 hPa (-1.1)
KWNW3 - 9087069- Kewaunee, WI 26 mi44 min SE 1.9 G 4.1 65°F 1012.9 hPa
MN4 - 9087088 - Menominee, MI 45 mi44 min ESE 2.9 G 4.1 70°F 1012.9 hPa54°F

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Green Bay, Austin Straubel International Airport, WI8 mi21 minNE 610.00 miFair74°F62°F67%1012.2 hPa

Wind History from GRB (wind in knots)
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Last 24hrNE11NE9NE10NE9NE6NE3E3E4E5CalmCalmCalmCalmN4N8N4N5NE7NE3E4NE5NE64NE6
1 day agoNE14NE12NE9NE10NE6CalmCalmN5NE9NE7NE7NE6N5NE7CalmN4E4N5NW4NE3E6NE5NE8NE8
2 days agoS12
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SW10S7S7SW7N4N6SW5SW7SW8
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SW8SW6SW7W6S7SW6W5NW4N7N10N7

Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of GreatLakes    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Green Bay, WI (15,3,4,5)
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Ground Weather Radar Station Green Bay, WI
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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.