Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Ephraim, WI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:51AMSunset 7:49PM Sunday April 23, 2017 2:51 PM CDT (19:51 UTC) Moonrise 4:34AMMoonset 4:25PM Illumination 6% 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 Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 959 Am Cdt Sun Apr 23 2017
This afternoon..NE wind 10 to 20 kts. Waves building to 2 to 4 ft. Partly cloudy.
Tonight..NE wind 10 to 20 kts. Waves 1 to 3 ft. Mostly cloudy in the evening then becoming partly cloudy.
Monday..SE wind 10 to 15 kts. Waves 1 to 3 ft. Partly cloudy.
Monday night..S wind 10 to 15 kts. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Mostly cloudy.
LMZ541 Expires:201704232215;;146029 FZUS53 KGRB 231459 NSHGRB NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GREEN BAY WI 959 AM CDT SUN APR 23 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ541>543-232215-

7 Day Forecast for Marine Location Near Ephraim, WI
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location: 45.16, -87.18     debug


Area Discussion for - Green Bay, WI
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Fxus63 kgrb 231628
afdgrb
area forecast discussion
national weather service green bay wi
1128 am cdt Sun apr 23 2017
updated aviation portion for 18z TAF issuance

Short term Today... Tonight... And Monday
issued at 515 am cdt Sun apr 23 2017
a back door cold front will continue making headway through
wisconsin today, assisted by lake michigan in producing what is
known as a pneumonia front that will push through the lakeshore
counties. Models have trended a bit quicker with the passage of
this cold air this run, with the front through north-central
wisconsin this morning, and east-central and northeast wisconsin
late this morning and early in the afternoon. Sections of central
wisconsin will be able to hold out until late in the afternoon
given their distance from the lakeshore. This front will act to
cause a wind shift to the northeast with falling temperatures
during the afternoon hours. Therefore highs will occur in the
morning across several locations depending on when the front
tracks through. With the quicker advance of the front sided with
the cooler met guidance with this forecast package as the previous
forecast was counting on a later arrival of the front. Adjusted
highs today down into the 40s across north-central and far
northeast wisconsin, with 50s across east-central and low to mid
60s across central wisconsin. The cold front may produce some
light rain across north-central wisconsin given better moisture.

However this activity is not expected to make it very far south as
model soundings dry up precipitously as you head further south.

The front will stall out over southern wisconsin tonight with dry
weather expected during the overnight hours. Lows tonight behind
the front will range from around 30 across north-central
wisconsin, to the middle 30s across central and east-central
wisconsin.

The front will lift back north as a warm front on Monday, bringing
warm air and gusty southerly winds to the area as highs soar into
the 60s away from the great lakes and far northern wisconsin. The
combination of warm temperatures, gusty winds and relative
humidities falling into the upper 20s could cause some fire
weather concerns to start the new work week.

Long term Monday night through Saturday
issued at 515 am cdt Sun apr 23 2017
mid level short wave energy ejecting from a trough setting up
over the plains will bring chances for precipitation for much of
this part of the forecast.

Showers are possible across the northwest part of the forecast
area on Monday night with an approaching surface low and a mid
level short wave passing north of wisconsin. Rain chances will
spread across the entire area Tuesday afternoon and evening as the
next low and short wave take a more southerly track across the
state. Freezing rain is possible, with some accumulation, later
Tuesday night as colder air makes its way into northern wisconsin,
but this should mainly be confined to vilas county. Expect any
freezing precipitation to change to all rain Wednesday morning as
surface temperatures warm above freezing. Precipitation chances
continue through Thursday as the next surface low and the main mid
level trough pass through wisconsin. A change to snow or mixed
rain and snow is expected across the area Wednesday night.

The next approaching surface low and mid level trough will bring
another chance for precipitation starting Friday afternoon in
central and eastern wisconsin and then spreading across the entire
forecast area for Saturday. Models differences in the timing and
track of the system lead to low confidence in this part of the
forecast.

High temperatures should be well above normal on Tuesday but a
cooling trend will result in daytime temperatures several degrees
below normal for the latter half of the work week. A warm up to
near normal highs can be expected for Saturday.

Aviation For 18z TAF issuance
issued at 1119 am cdt Sun apr 23 2017
a canadian cold front will continue to drop southward across the
region this afternoon. Scattered to broken MVFR CIGS are likely
behind the front over eastern and northern wisconsin. Central wi
may escape the lower cigs, though did include a scattered mention
at auw and cwa. Light rain/snow showers should diminish over
northern wi this afternoon. MVFR clouds to linger into the
evening, then should see clearing as drier air returns northward.

Partly cloudy conditions are expected on Monday with mid and high clouds
invading from the west. Southeast winds to become gusty midday.

Fire weather
Issued at 515 am cdt Sun apr 23 2017
low relative humidities are expected across portions of central
wisconsin ahead of an approaching cold front. With temperatures
expected to soar into the lower to middle 60s and dew points in
the lower to middle 30s relative humidity values of around 30
percent are expected this afternoon, causing elevated fire weather
concerns across these areas.

On Monday the cold front will lift back north as a warm front
across the western great lakes. This will bring warm temperatures
back to the region along with gusty southerly winds and low
relative humidities. Near critical fire weather conditions are
possible on Monday as temperatures soar into the 60s with winds
gusting to 20 to 25 mph as relative humidities fall into the
middle to upper 20s.

Grb watches/warnings/advisories
None.

Short term... ..Kurimski
long term... ... Mg
aviation... ... .Mpc
fire weather... Kurimski


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CBRW3 - Chambers Island, WI 10 mi72 min NNE 14 G 18 38°F 1021 hPa
NPDW3 - Northport Pier at Death's Door WI 14 mi72 min N 13 G 14 39°F 1021.3 hPa
MN4 - 9087088 - Menominee, MI 22 mi52 min NE 16 G 18 39°F 1020.4 hPa (-0.7)34°F
FPTM4 - Fairport, MI 42 mi72 min N 12 G 18 39°F
45002 - N MICHIGAN- Halfway between North Manitou and Washington Islands. 43 mi62 min NE 14 G 16 36°F 37°F3 ft1022.7 hPa (+0.0)

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sturgeon Bay, WI24 mi56 minN 1410.00 miPartly Cloudy45°F33°F63%1023.4 hPa
Menominee, Menominee-Marinette Twin County Airport, MI24 mi56 minE 1510.00 miA Few Clouds41°F32°F70%1023.7 hPa

Wind History from MNM (wind in knots)
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Last 24hr--S11S12SW16
G19
SW13SW10SW11SW8SW8SW6SW5W6SW5W4CalmCalmE13NE12NE10E13
G17
E13E13E13E15
1 day agoN7SE10E7E8E8CalmSE6E4E4CalmCalmCalmNW4NW3NW4Calm3--S4Calm56S7SW7
2 days agoNE10N6N6NW5NW3N3CalmCalmCalmNW5NW4NW9
G16
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NW7NW7NW8N9
G18
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G20
N10

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 (15,3,4,5)
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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.