Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Green Bay, WI

Version 3.4
What's New / NOTES
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.
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.

Sunrise 5:46AMSunset 7:52PM Thursday April 26, 2018 8:27 AM CDT (13:27 UTC) Moonrise 4:14PMMoonset 4:32AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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- 437 Am Cdt Thu Apr 26 2018
Today..SW wind increasing to 10 to 20 kts. Waves building to 1 to 3 ft. Partly cloudy.
Tonight..NW wind 10 to 15 kts veering N in the late evening and overnight. Waves 1 to 3 ft. A chance of showers in the evening.
Friday..NW wind 5 to 10 kts veering ne in the late morning and afternoon. Waves 2 ft or less. Showers likely.
Friday night..N wind 10 to 20 kts. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. Wave height forecasts are for ice-free areas.
LMZ522 Expires:201804261615;;053175 FZUS53 KGRB 260937 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 437 AM CDT Thu Apr 26 2018 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-261615-

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 261137
afdgrb
area forecast discussion
national weather service green bay wi
637 am cdt Thu apr 26 2018
updated aviation portion for 12z TAF issuance

Short term Today... Tonight... And Friday
issued at 417 am cdt Thu apr 26 2018
precipitation trends and temperatures are the main forecast
concerns.

A cold front extending from northern mn into the eastern dakotas
will shift southeast, reaching north central wi early this
afternoon, and east central wi this evening. Ahead of the front,
temperatures will warm into the 60s, with relative humidity
dropping into the 20 to 30 percent range. The mild and dry
conditions, coupled with moderate southwest winds may result in
elevated fire danger in grasses and other fine fuels, so residents
should not attempt to burn yard waste.

Although no precipitation is currently occurring with the front,
at least a narrow band of post-frontal showers is expected to
develop as it moves through grb CWA this afternoon evening.

Temperatures will cool back down in the wake of the front
overnight, with lows dropping into the upper 20s north and 30s
elsewhere.

A clipper low pressure system will track just southwest of the
forecast area on Friday and spread precipitation into the
region during the morning. Temperatures will be cold enough for
a period of light snow during the early to mid-morning, with
potential for an inch or less of accumulation over mainly north
central wi. Have bumped pops up to likely or categorical over much
of the forecast area during the late morning and afternoon. Also
trimmed back the chance of thunderstorms, confining the mention
to only the southwest half of the forecast area, where mid-level
lapse rates will be steepest. High temperatures will be much
cooler, in the 40s and lower 50s.

Long term Friday night through Wednesday
issued at 417 am cdt Thu apr 26 2018
500mb ridge will build across the region late in the weekend as an
upper trough continues to deepen across the western united states.

The upper trough is expected to continue to deepen early next
week. In response, a southwest flow pattern will develop across
the western great lakes. This pattern usually brings milder and
wetter conditions to the area. This may be the case next week
which could renew flooding concerns on area rivers if heavy rain
materializes.

For Friday night, continued a small chance of showers during the
early evening hours as system departs the area. There could be
a period of gusty winds from the north behind the system. This
would be more of a marine concern for small crafts. High pressure
is expected to dominate the weather pattern over the weekend,
bringing dry conditions with very low relative humidity readings.

The dry weather should last into Sunday evening as the high moves
off to the east. The forecast becomes muddled on Monday as the
ecmwf is consistent in bringing a chance of showers and perhaps
storms with 500mb disturbance. The cloud cover and rain would
significantly impact high temperatures during the period. Due to
uncertainty in the precipitation chances Monday, continued the
previous forecast on high temperatures.

On Tuesday, the models would suggest we would have the warmest day
of the year so far with highs in the 70s and dewpoints climbing
into the 50s to near 60. A cold front will be moving into the
region during the day Tuesday and across the area Tuesday evening.

It now appears there may be a window of opportunity for severe
thunderstorms Tuesday afternoon and evening. Model guidance
was indicating steep mid level lapse rates, 0-6 km shear values
of 35 to 45 knots, total totals in the 50 to 55 range along with
a fairly impressive jet streak moving across the area to aid in
the lift. Some of the thunderstorms could produce damaging winds
and large hail, especially if the ECMWF slower solution plays out.

It is still 6 days out, so a lot can change between now and then,
thus will watch it over the next several days to see the risk of
severe weather increases. Beyond Tuesday night, models in good
agreement bringing another wave of low pressure into the region
Wednesday into Thursday. This feature would also have the
potential for heavy rain if it materializes.

Aviation For 12z TAF issuance
issued at 628 am cdt Thu apr 26 2018
vfr conditions are anticipated over most of the forecast area
through the TAF period. The exception may be over far north
central wi late tonight. A cold front will move through the region
during the afternoon and early evening, followed by a narrow
band of post-frontal showers. The showers should exit eastern wi
by midnight. A clipper low pressure system will approach the
region late tonight, and may bring some light snow to far north
central wi.

Grb watches warnings advisories
None.

Short term... ..Kieckbusch
long term... ... Eckberg
aviation... ... .Kieckbusch


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWNW3 - 9087069- Kewaunee, WI 26 mi40 min SSW 4.1 G 5.1 40°F 1012.6 hPa
MN4 - 9087088 - Menominee, MI 45 mi40 min SW 4.1 G 6 41°F 1012.2 hPa29°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 mi35 minSW 510.00 miFair41°F35°F79%1013.6 hPa

Wind History from GRB (wind in knots)
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Last 24hrN12N12N9
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N74NW8N9NW7W9W6S5S5SE8SE6S5S4S4S4S4CalmSW3S3SW4SW5
1 day agoCalmE3NE6NE75NE5NE6NE9NE13NE18NE20
G26
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NE16NE13N7N10N9N6N10N10N9N11N13
2 days agoCalmW3CalmCalmNW35NE5E8NE6E6NE6NE5N3CalmCalmCalmN4NW3CalmCalmNW5CalmW3Calm

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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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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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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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.