Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Roosevelt Park, MI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 6:11AMSunset 9:12PM Wednesday May 23, 2018 8:35 PM EDT (00:35 UTC) Moonrise 2:00PMMoonset 2:28AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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- 324 Pm Edt Wed May 23 2018
.dense fog advisory in effect until 11 am edt Thursday...
Tonight..Southeast winds 5 to 10 knots. Partly cloudy. Widespread dense fog in the evening, then areas of dense fog overnight. Waves less than 1 foot.
Thursday..South winds 5 to 15 knots. Sunny. Patchy dense fog through the day. Waves less than 1 foot.
Thursday night..South winds 5 to 15 knots. Mostly clear. Waves around 1 foot.
Friday..South winds around 15 knots. Sunny. A slight chance of showers and Thunderstorms in the afternoon. Waves 1 to 3 feet.
LMZ847 Expires:201805240315;;417301 FZUS53 KGRR 231924 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 324 PM EDT Wed May 23 2018 For waters within five nautical miles of shore on Lake Michigan LMZ847-240315-

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 232356
afdgrr
area forecast discussion
national weather service grand rapids mi
756 pm edt Wed may 23 2018
latest update...

aviation

Synopsis
Issued at 318 pm edt Wed may 23 2018
high pressure over michigan tonight and Friday will drift east over
the weekend and a south flow will send moisture northward to the
great lakes. If you like to sweat, you're going to love the first
half of the weekend. Muggy conditions are expected with highs in the
mid 80s and dewpoints in the mid 60s.

There is a chance of thunderstorms too Saturday as low pressure
moves across lower michigan.

Short term (this evening through Friday night)
issued at 318 pm edt Wed may 23 2018
forecast concerns deal with fog chances tonight and precipitation
chances Friday night.

Latest sfc analysis shows high pressure centered over western
michigan, which means light winds at the surface. There has beens
some convective mixing this afternoon and that has brought down some
drier air which was being reflected in sfc dewpoints in the 40s.

We'll see dewpoints creep up tonight as the mixing wanes with sunset
and that will likely set the stage for some fog. Fog will be most
prevalent in the river valleys and other low lying areas and along
the lake shore. We're not going with a dense fog advisory at this
point because confidence of wide spread dense fog is low. We are
quite a bit drier currently than yesterday at this time due to
mechanical mixing.

Humidity will begin to increase Thursday as south winds develop on
the back side of the departing high and dewpoints rise to the mid
50s. We'll still see considerable sunshine, but it'll be warmer and
a bit more humid.

Low pressure over the upper mississippi valley will move southeast
Friday and Friday night. It'll drag a weak cold front with it but
the front will generally wash out as it moves across the state. The
low, though, will act as a focus for a few showers and or storms
Friday. Friday will see temperatures a degree or two warmer than
Thursday and dewpoints near 60. It'll definitely feel more humid.

Long term (Saturday through Wednesday)
issued at 318 pm edt Wed may 23 2018
the warm weather pattern will persist for much of the holiday
weekend. We are monitoring Monday for a possible change of airmass.

The high res euro over the past couple of runs has been drawing down
a backdoor cold front... With falling 925 mb temperatures through the
day. The MOS guidance has also been lowering daytime temperatures
for Monday over the past couple of runs. Will maintain the above
normal temperatures for Monday but not quite as warm as previously
forecasted. Rainfall is currently expected to remain scattered
given the weak forcing pattern that we will be in.

An area of high pressure is shown to be centered over ontario for
Tuesday. This should support a dry east to northeast flow here in
mi.

Aviation (for the 00z tafs through 00z Thursday evening)
issued at 756 pm edt Wed may 23 2018
main focus of the aviation forecast tonight is the potential for
fog. Otherwise, mainly clear skies are expected outside of the fog
with calm winds tonight. Winds on Thursday will become south-
southwest at 5-10 knots.

As for the fog, it was mainly a grr to the west problem last night
and we dried out quite a bit today. Thinking we are not looking at
widespread fog problems tonight. The worst of the conditions will
likely be from kmkg up the lakeshore overnight. So, have put ifr
conditions in the TAF at kmkg and some light MVFR fog elsewhere.

Guidance is even more optimistic inland than our forecast,
keeping thingsVFR.

Marine
Issued at 318 pm edt Wed may 23 2018
the marine fog advisory remains in effect through Thursday morning.

Latest vis loop shows fog hugging the coast line. Higher dewpoints
over colder water coupled with weak winds aloft are usually a recipe
for dense fog. Otherwise, wind and waves will not be hazardous to
small craft.

Hydrology
Issued at 318 pm edt Wed may 23 2018
rivers will continue to fall slowly for the next couple of days.

Significant rainfall is not expected.

Grr watches warnings advisories
Mi... None.

Lm... Dense fog advisory until 11 am edt Thursday for lmz844>848.

Synopsis... 04
short term... 04
long term... Mjs
aviation... Duke
hydrology... 04
marine... 04


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 1 mi35 min WNW 1.9 G 1.9 53°F 1022.1 hPa (-0.8)52°F
45161 3 mi35 min Calm G 1.9
45029 23 mi35 min WNW 1.9 G 1.9 53°F 49°F1022.2 hPa (-1.1)49°F
HLNM4 - 9087031 - Holland, MI 32 mi47 min NNW 5.1 G 5.1 55°F 1021.1 hPa54°F
LDTM4 - 9087023 - Ludington, MI 50 mi47 min SSW 8.9 G 11 64°F 56°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI6 mi40 minW 410.00 miMostly Cloudy66°F57°F73%1021.9 hPa

Wind History from MKG (wind in knots)
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Last 24hrNW3SW8SW6CalmSW4CalmCalmCalmSE3CalmCalmSW4SW3SW35SW6CalmSW6SW7W5SW6W6SW4W4
1 day agoE11E8E7E6E5E5NE4NE4NE5E3NE5CalmN4NW5NW5W7W5NW4W7W8W8W7W5W4
2 days agoCalmCalmCalmCalmCalmCalmNE6E5NE6E5E4E7E11E11E10E9E8E7E7E9E13
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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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wmap_A
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 Grand Rapids, MI (20,4,5,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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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.