Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Roosevelt Park, MI

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 6:04AMSunset 9:30PM Saturday June 24, 2017 3:10 AM EDT (07:10 UTC) Moonrise 5:52AMMoonset 9:02PM Illumination 0% Phase: New Moon; Moon at 0 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- 1032 Pm Edt Fri Jun 23 2017
.small craft advisory in effect from 6 am edt Saturday through Sunday evening...
Rest of tonight..Northwest winds 10 to 20 knots. Partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet toward daybreak.
Saturday..West winds 15 to 20 knots. Mostly Sunny. A slight chance of showers and Thunderstorms in the afternoon. Waves 2 to 4 feet.
Saturday night..West winds 10 to 20 knots. Partly cloudy with a chance of showers. Waves 1 to 3 feet.
Sunday..West winds 15 to 20 knots. Partly Sunny. A slight chance of showers until midday, then a slight chance of showers and Thunderstorms in the afternoon. Waves 2 to 4 feet.
LMZ847 Expires:201706240915;;723152 FZUS53 KGRR 240232 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1032 PM EDT Fri Jun 23 2017 For waters within five nautical miles of shore on Lake Michigan LMZ847-240915-

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 240550
afdgrr
area forecast discussion
national weather service grand rapids mi
150 am edt Sat jun 24 2017
latest update...

aviation

Synopsis
Issued at 330 pm edt Fri jun 23 2017
colder than normal temperatures can be expected this weekend
through early next week, with widely scattered showers and
thunderstorms. Rainfall will not be excessive.

Update
Issued at 850 pm edt Fri jun 23 2017
i added a 20 to 30 pct chance of showers to area near and west of
us-131 for this evening as the shortwave currently crossing
central wisconsin moves over lake michigan. A few showers have
developed ahead of the shortwave but there is a lot of dry air at
lower levels for these showers to overcome. I am thinking they
will die off as they move inland this evening.

Short term (this evening through Sunday night)
issued at 330 pm edt Fri jun 23 2017
trough aloft and series of vorticity maxima shortwaves sliding
through the northwest flow will bring periods of cloudiness and
scattered showers over the weekend.

Best coverage of convection, and the best time for a few tstms,
should generally be in the afternoon and evening hours when the
diurnal contribution instability is highest. Also,the lake shadow
should tend to focus things inland from lake michigan.

Lowering freezing heights through the weekend may eventually lead to
a chance of some small hail in some of the low topped convection,
which would be more possible on Sunday than on Saturday.

Scattered intermittent nature of the convection of the weekend
should lead to total qpfs of generally no more than a quarter
inch, with highest amounts north of i-96.

Long term (Monday through Friday)
issued at 330 pm edt Fri jun 23 2017
Monday will see cooler than normal weather with diurnal enhancement
of showers and a few thunderstorms as upper level troughing brings
steep lapse rates. No severe weather is expected although the
storms could bring small hail during the afternoon as freezing
levels are unusually low.

The trough axis moves east by Tuesday with shortwave ridging
returning Wednesday along with warming temperatures. We will also
see moisture return in southwest flow with chances for rain by
Wednesday afternoon. Surface low center tracks north of lower
michigan on Thursday and showers and thunderstorms along and ahead
of trailing cold front will persist into Friday as the front sags
south of lower michigan and stalls across the ohio valley.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 150 am edt Sat jun 24 2017
vfr conditions expected through Saturday night. A brief shower is
possible tomorrow afternoon, but chances too low to include in the
tafs. Winds will become light overnight and pick back up tomorrow
afternoon out of the west. Gusts to 25 kts expected.

Marine
Issued at 1054 pm edt Fri jun 23 2017
given how cold the air coming in is relative to the lake michigan
surface water temperatures, it seems more than reasonable to
believe 3 to 5 foot waves are expected Saturday into Sunday near
and south of muskegon. So I issued both a SCA and beach hazard
statement from Saturday morning till Sunday evening.

Hydrology
Issued at 257 pm edt Fri jun 23 2017
major flooding is expected along the chippewa river in isabella
county and sharp rises are also occurring along the muskegon basin
and will continue the next couple days as the crest moves down
the river. From 3 to 5 inches of rain fell last night combined
with earlier heavy rains.

The good news is that no heavy rain is expected through the
middle of next week which will allow those areas that are flooding
to recover. The next chance for significant rain will be Thursday
of next week.

Grr watches warnings advisories
Mi... Beach hazards statement from 6 am edt this morning through
Sunday evening for miz056-064-071.

Lm... Small craft advisory from 6 am this morning to 8 pm edt Sunday
for lmz844>848.

Update... Wdm
synopsis... Meade
short term... Meade
long term... Ostuno
aviation... 63
hydrology... Ostuno
marine... Wdm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 1 mi21 min NW 18 G 20 66°F 1008.3 hPa59°F
45161 3 mi31 min WNW 16 G 19 64°F 65°F2 ft1008.4 hPa
45029 23 mi21 min WNW 14 G 18 65°F 68°F3 ft1008.6 hPa57°F
HLNM4 - 9087031 - Holland, MI 32 mi41 min W 14 G 18 65°F 1008.5 hPa
LDTM4 - 9087023 - Ludington, MI 50 mi41 min WNW 5.1 G 13 64°F 55°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI6 mi76 minWNW 810.00 miFair66°F55°F70%1008.1 hPa

Wind History from MKG (wind in knots)
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1 day agoSE7SE9S10SE7S20
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2 days agoCalmCalmCalmSE3CalmCalmCalmSW5SW6SW7SW8SW10W9W8SW7W54SW5CalmCalmCalmSE4SE6SE6

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 (3,6,7,8)
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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.