Friday, June23, 2017 L-36.com


Marine Weather and Tides
Neenah, WI

Version 3.4
What's New / NOTES
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 5:09AMSunset 8:43PM Friday June 23, 2017 12:16 PM CDT (17:16 UTC) Moonrise 4:59AMMoonset 8:11PM 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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LMZ543 Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 1029 Am Cdt Fri Jun 23 2017
.small craft advisory in effect until 8 pm cdt this evening...
Rest of today..W wind 10 to 20 kts. Gusts to 25 kts this afternoon. Waves 1 to 2 ft. Partly cloudy. A slight chance of a shower or storm late in the afternoon.
Tonight..NW wind 10 to 20 kts. Gusts to 25 kts possible early. Waves 2 ft or less. Becoming mostly clear.
Saturday..W wind 10 to 20 kts. Waves 2 ft or less. A chance of showers. A chance of Thunderstorms in the afternoon.
Saturday night..W wind 10 to 20 kts. Waves 2 ft or less. A chance of showers.
LMZ543 Expires:201706232230;;696342 FZUS53 KGRB 231529 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1029 AM CDT Fri Jun 23 2017 For waters within five nautical miles of shore on Lake Michigan LMZ542-543-232230-

7 Day Forecast for Marine Location Near Neenah, WI
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location: 44.18, -88.48     debug


Area Discussion for - Green Bay, WI
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Fxus63 kgrb 231145
afdgrb
area forecast discussion
national weather service green bay wi
645 am cdt Fri jun 23 2017
updated aviation portion for 12z TAF issuance

Short term Today... Tonight... And Saturday
issued at 400 am cdt Fri jun 23 2017
the cold front had just about exited the forecast area at 09z and
the rain should end by daybreak. Cooler and drier air will work
it's way into wisconsin today, though there could be scattered
showers in the afternoon hours over central and northcentral
wisconsin. Highs will be close to normal for this time of year.

Skies should start the evening our clear, but some clouds will
increase overnight as an upper low approaches from north dakota.

With dewpoints in the upper 40s to low 50s, low temperatures
should be a few degrees below normal.

Saturday will be breezy and cool, with showers and thunderstorms -
especially in the afternoon. The approaching upper low will be
accompanied by 500 mb temperatures of -20 to -25 c by evening
creating an unstable atmosphere that could support thunderstorms
with gusty winds, small hail and perhaps some cold air funnels.

Long term Saturday night through Thursday
issued at 400 am cdt Fri jun 23 2017
an amplified mean flow to persist into early next week, consisting
of an upper ridge over the western CONUS and an upper trough over
the eastern conus. The flow will then flatten toward the middle of
next week as the eastern trough shifts into the atlantic and the
weakening upper ridge gets shoved eastward across the central
conus, being replaced out west by another upper trough. Models are
having issues with the movement strength of this new upper trough
which places uncertainty into the forecast for next Wednesday
Thursday. Bottom line is that the unsettled weather cool
conditions will continue Sunday Monday, then a warmer perhaps more
unsettled pattern for mid-week.

A vigorous little shortwave trough is forecast to push across the
eastern half of wi Saturday evening, before shifting into lower mi
later Saturday night. Even though instability will weaken with the
loss of daytime heating, there is decent mid-level forcing so
anticipate showers few thunderstorms to carry over through
Saturday evening and mostly come to an end overnight. Despite
plenty of cloud cover, the air mass aloft is quite cool by late
june standards (8h temperatures at +2c to +4c range), so min
temperatures will still get down into the middle 40s north-central
wi, lower 50s east-central wi. The next shortwave trough is
expected to drop southeast into the western great lakes region on
Sunday and bring yet another chance for showers afternoon storms
to northeast wi. While this trough is not as strong as its
predecessor, mucapes do approach 300 j kg over east-central wi so
a few of these storms could briefly become strong with small hail
possible. Temperatures will remain well below normal with readings
only in the lower 60s north-central, upper 60s for eastern wi.

Much like Saturday night, it is going to take a while for these
showers thunderstorms to dissipate Sunday night. In fact, some of
the models linger the threat of showers through the night as
instability is slow to diminish and mid-level forcing lingers. The
air mass aloft does not change much, therefore look for min
temperatures to again be in the middle 40s north-central, upper
40s central far northeast and lower 50s east-central wi. The last
in the series of shortwave troughs is progged to move into the
great lakes region on Monday. By this time, upper heights are
beginning to rise over wi as the main upper trough shifts
eastward, thus the air mass aloft will start to moderate. Less
instability should keep shower chances on the low side with no
thunder anticipated. MAX temperatures to range from the middle 60s
north-central, upper 60s to around 70 degrees elsewhere.

An area of high pressure is forecast to build into wi Monday night
and reside to our east on Tuesday. Northeast wi will finally get a
stretch of dry weather with a return of sunshine Tuesday, along
with an uptick in temperatures. Look for readings to mainly be in
the lower to middle 70s.

The mean flow to have become somewhat zonal from the west coast to
the great lakes by Tuesday night. Under this regime, models
typically struggle with timing of systems and this occurs once
again headed into Tuesday night Wednesday as the GFS cmc are
faster than the ecmwf. The faster solution already has
precipitation chances overspreading northeast wi Tuesday night,
while the slower solution holds precipitation off until Wednesday
afternoon. For now, will split the difference and bring small
chance pops to central wi late Tuesday night and go with chance
pops for the entire forecast area on Wednesday (although the
precipitation may hold off until the afternoon hours in the east).

Max temperatures will continue to warm with readings into the
lower 70s north-central lakeshore, middle to upper 70s elsewhere.

Models continue to struggle headed into Thursday with the gfs
showing a west-southwest flow aloft over wi with a cold front
slowly pushing into wi. Meanwhile, the ECMWF has a west-northwest
flow aloft over wi with no cold front. Just too wide a spread
among the models to have confidence in either one, therefore have
followed the consensus solution which runs a chance of showers and
thunderstorms for both Wednesday night and Thursday.

Aviation For 12z TAF issuance
issued at 645 am cdt Fri jun 23 2017
good flying weather expected today and tonight, though
there could be a brief shower in the afternoon in central and
northern wisconsin. An upper low pressure system will bring a
better chance of showers and thunderstorms Saturday, especially
during the afternoon and evening hours.

Grb watches warnings advisories
None.

Short term... ..Rdm
long term... ... Kallas
aviation... ... .Rdm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 51 mi77 min WNW 12 G 14 73°F 1004.4 hPa (+0.6)52°F
KWNW3 - 9087069- Kewaunee, WI 56 mi47 min WSW 4.1 G 7 74°F 1003.9 hPa

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Appleton-Outagamie, WI6 mi32 minWSW 1010.00 miPartly Cloudy73°F50°F44%1004.7 hPa
Wittman Regional Airport, WI13 mi24 minW 610.00 miFair75°F55°F50%1003.6 hPa

Wind History from ATW (wind in knots)
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Last 24hrSW9SW11SW7SW9SW9W5NW7SW3W7W4W3SW3S4SW5W3W5W4W7W7W8W7W6SW7W10
1 day agoSW7SW9SW7SW7SE9S13S10S8S6S8S9S9S8CalmSE9SE11NW9
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W10W6NW6N7N5CalmCalmCalmCalmW3CalmW5W5N4CalmCalmCalmCalmCalm4SW5

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 (13,3,4,5)
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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.