Wednesday, August23, 2017 L-36.com


Marine Weather and Tides
Stephenson, MI

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 6:04AMSunset 7:44PM Wednesday August 23, 2017 3:11 AM CDT (08:11 UTC) Moonrise 8:01AMMoonset 8:56PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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LMZ521 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- 914 Pm Cdt Tue Aug 22 2017
.small craft advisory in effect until 4 am cdt Wednesday...
Rest of tonight..NW wind 10 to 20 kts with gusts to 25 kts. Waves 1 to 3 ft...locally higher near deaths door. Mostly clear.
Wednesday..NW wind 10 to 20 kts. Waves 1 to 3 ft. Partly cloudy.
Wednesday night..N wind 10 to 20 kts. Waves 2 ft or less. Mostly clear.
Thursday..NE wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy in the morning then clearing.
LMZ521 Expires:201708231015;;803686 FZUS53 KGRB 230214 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 914 PM CDT Tue Aug 22 2017 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-541-231015-

7 Day Forecast for Marine Location Near Stephenson, MI
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location: 45.42, -87.34     debug


Area Discussion for - Marquette, MI
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Fxus63 kmqt 230528
afdmqt
area forecast discussion
national weather service marquette mi
128 am edt Wed aug 23 2017

Short term (this evening through Wednesday)
issued at 312 pm edt Tue aug 22 2017
unseasonably cool northwest flow this afternoon, with diurnally
driven cumulus clouds across the upper peninsula. Temps have slowly
warmed into the middle and upper 60s, with dry air trying to mix out
dewpoints into the lower 50s in spots. With the thermal differential
and minor instability, a few showers have popped up but nothing to
be concerned with for convection at this time. Expect as we approach
sunset clouds will steadily erode with just p-cloudy skies
overnight. In addition a weak lobe of vorticity will slide southeast
across the area and could keep a slight chance for showers through
the overnight hours. Temps will radiate into the 40s tonight, with
warmer temps closest to lake superior michigan and possibly falling
into the upper 30s across the west-central u.P.

High pressure will be building into the region from the west
Wednesday with winds turning northerly later in the day. Temps will
warm into the lower to middle 60s Wed with skies partly cloudy
throughout the afternoon.

Long term (Wednesday night through Tuesday)
issued at 306 pm edt Tue aug 22 2017
very quiet weather expected through much of the extended forecast.

The only issue expected will be the frost potential on Wednesday
night and again Thursday night into Friday morning.

At the surface, high pressure will build into the area and linger
through much of the extended forecast. This will keep mainly dry
condtions in place across the upper great lakes region under light
winds. Aloft, much of the east half of the CONUS will be under a
general troughing pattern. While afternoon mixing will be very good,
the potential for any afternoon CU development will be marginal as
the airmass looks to be very dry throughout the thermal profile.

Pwat values actually look to be around 50 percent of normal for this
time of year, again, pointing toward the drier air moving into the
area. This very dry air in place along with light winds will lead to
near to slightly below normal temperatures through the extended. In
fact, overnight lows will likely drop to near 30 degrees over
portions of the inland west Wednesday night into Thursday morning
and again Thursday night into Friday morning. Some of the coldest
model guidance is actually showing lows dropping into the mid and
upper 20s in some of the coldest locations of the inland west.

Definitely not out of the question with maximized radiational
cooling. These much cooler overnight lows will lead to patchy to
potentially widespread frost across the inland west areas of the
u.P. For both Wednesday night and again Thursday night.

Aviation (for the 06z tafs through 06z Wednesday night)
issued at 127 am edt Wed aug 23 2017
vfr conditions will give way to MVFR to lowerVFR CIGS overnight as
secondary trough brings in resurgence of cool moist air to the
region. May be a few light showers late tonight into Wed morning at
iwd and saw behind the trough but no reduction to vsby is expected.

After broken to overcast clouds to start the day on wed, expect
skies to clear out in the afternoon. NW winds will be gusty again at
all the TAF sites, but not as strong as occurred on Tue aftn.

Marine (for the 4 am lake superior forecast issuance)
issued at 503 am edt Tue aug 22 2017
a tight pres gradient between low pressure lifting northeast from
lake superior and high pressure building toward the area from the
northern plains will result in wnw winds to 30 knots this afternoon
into this evening and a few gale force gusts over the eastern lake.

Winds will veer to the nnw tonight behind a trough with winds
remaining in the 20-30 knot range through Wednesday. The winds will
then diminish Wed night as high pressure builds into the area and
remain below 20 knots for the rest of the week.

Mqt watches warnings advisories
Upper michigan...

none.

Lake superior...

none.

Lake michigan...

none.

Short term... Beachler
long term... Kec
aviation... Jla
marine... Jlb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NPDW3 - Northport Pier at Death's Door WI 21 mi31 min NW 16 G 20 62°F 1012.2 hPa
MN4 - 9087088 - Menominee, MI 26 mi41 min W 7 G 11 58°F 1012.7 hPa54°F
FPTM4 - Fairport, MI 39 mi31 min NW 8.9 G 15 60°F 1011.5 hPa
45014 48 mi41 min W 16 G 19 63°F 70°F1013.3 hPa

Wind History for Menominee, MI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Escanaba, MI25 mi15 minWNW 410.00 miFair54°F52°F93%1014 hPa

Wind History from ESC (wind in knots)
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Last 24hrW4W8W10NW11
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W4W5W4W5W4W5W6W6NW4
1 day agoN5W5W3NW4NW4--N4CalmSE6SE7S6SE10SE7SE6SE5SE6SE4E6SE3CalmSW4SW9SW7SW6
2 days agoW4CalmCalmCalmSW5S5S6S7S11S9S12S16
G21
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G19
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G23
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G17
S10S6SW6SW3SW3CalmCalmCalm

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 Marquette, MI (4,6,7,8)
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Ground Weather Radar Station Marquette, MI
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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.