Thursday, August24, 2017 L-36.com


Marine Weather and Tides
Roosevelt Park, 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 7:00AMSunset 8:33PM Thursday August 24, 2017 6:33 AM EDT (10:33 UTC) Moonrise 9:04AMMoonset 9:21PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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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LMZ847 Grand Haven To Whitehall Mi- 328 Am Edt Thu Aug 24 2017
Today..Northeast winds around 10 knots backing north 10 to 20 knots. Partly Sunny with a slight chance of showers until midday, then Sunny in the afternoon. Waves 1 to 2 feet.
Tonight..Northeast winds 10 to 15 knots. Mostly clear. Waves 1 to 2 feet.
Friday..East winds 5 to 15 knots. Sunny. Waves 1 foot or less.
Friday night..North winds 5 to 10 knots veering east after midnight. Mostly clear. Waves 1 foot or less.
LMZ847 Expires:201708241515;;309632 FZUS53 KGRR 240728 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 328 AM EDT Thu Aug 24 2017 For waters within five nautical miles of shore on Lake Michigan LMZ847-241515-

7 Day Forecast for Marine Location Near Roosevelt Park, MI
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location: 43.22, -86.36     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 240728
afdgrr
area forecast discussion
national weather service grand rapids mi
328 am edt Thu aug 24 2017
latest update...

synopsis short term long term marine

Synopsis
Issued at 328 am edt Thu aug 24 2017
weak low pressure will bring a few showers this morning then fair
weather will return this afternoon and continue into next week as
high pressure dominates the weather across michigan.

Short term (today through Saturday)
issued at 328 am edt Thu aug 24 2017
fairly vigorous shortwave trough moving through this morning and
into the afternoon should bring a few showers. Left thunder out of
the forecast but an isolated storm cannot be ruled out as lapse
rates steepen. The trough axis moves through this afternoon and
showers should exit the southern zones during the afternoon.

Then flat ridging moves in on Friday and Saturday with fair
weather and temperatures slightly below normal.

Long term (Saturday night through Wednesday)
issued at 328 am edt Thu aug 24 2017
an upper ridge should keep us dry into Saturday night and Sunday.

The pattern becomes more amplified into the first part of next week.

The models may struggle with this pattern change, so timing issues
exist through much of the first half of next week. This includes
the possibility of some tropic influence from harvey.

It appears a short wave will be moving into the western great lakes
by Sunday, bringing a surface cold front and showers to SW mi by
Sunday night into Monday. The short wave appears to develop into an
upper low near chicago by Monday evening, as some tropical
interaction with harvey is possible by then. The upper low is then
only progged to reach to about detroit by Tuesday night. With this
regime, the Monday through Tuesday period should be the wettest,
with perhaps lighter rains lingering into Wednesday.

Temps will be fairly uniform much of the weekend and into the first
half of next week with daytime highs in the 70s each day.

Aviation (for the 06z tafs through 06z Thursday night)
issued at 1255 am edt Thu aug 24 2017
vfr conditions are expected through much of the next 24 hours.

However a weak system will be reaching the region around daybreak.

This will mainly bring a short period of light rain, and could
have some isolated MVFR ceilings with it. Most likely area to see
the MVFR would be near lake michigan, where warm waters and cool
air could bring ceilings lower. Have a brief period MVFR at mkg in
the TAF toward daybreak. This MVFR could reach toward grr, but
left it out of the TAF for now. Then expect the MVFR to mix out by
14z, before it gets too far inland or much farther south.

After a 3 to 6 hour period of light rain, the system will be
through, with clearing skies by mid to late afternoon.

Marine
Issued at 328 am edt Thu aug 24 2017
winds and waves will be relatively light into the weekend. There
is a very slight chance of a thunderstorm and even an isolated
waterspout through early afternoon.

Hydrology
Issued at 1213 pm edt Wed aug 23 2017
area rivers are around normal levels for the time of the year and
well below bankfull. The rivers have already recovered from the
recent rainfall. No significant precipitation is expected through
the weekend, so no river issues are expected.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Ostuno
short term... Ostuno
long term... Jk
aviation... Jk
hydrology... 63
marine... Ostuno


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 1 mi34 min E 8 G 12 59°F 1018.3 hPa (+0.9)52°F
45161 3 mi34 min E 14 G 16 60°F 70°F1017.8 hPa (+0.6)
45029 23 mi24 min ESE 14 G 18 60°F 72°F1 ft1017.9 hPa51°F
HLNM4 - 9087031 - Holland, MI 32 mi52 min ENE 6 G 9.9 58°F 1017.4 hPa
LDTM4 - 9087023 - Ludington, MI 50 mi46 min E 4.1 G 5.1 53°F 49°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI6 mi99 minE 310.00 miMostly Cloudy56°F51°F84%1018.1 hPa

Wind History from MKG (wind in knots)
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Last 24hrNW7NW8NW9
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NW8NW5N7N4CalmCalmCalmCalmCalmCalmNE3E3E4
1 day agoW14
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2 days agoCalmCalmSE3SW8SW7SW7SW9SW8SW6SE8S9S9W6S9SW10S11S9S10S13
G17
S11S11SW17
G24
SW20SW18
G24

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 Grand Rapids, MI (6,6,7,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, 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.