Thursday, November23, 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 7:47AMSunset 5:15PM Thursday November 23, 2017 9:33 AM EST (14:33 UTC) Moonrise 11:50AMMoonset 9:41PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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- 336 Am Est Thu Nov 23 2017
.small craft advisory in effect through this afternoon...
.gale watch in effect from Friday morning through Friday evening...
Today..Southwest winds 10 to 20 knots. Mostly cloudy with a slight chance of snow showers until midday, then Sunny in the afternoon. Waves 4 to 6 feet.
Tonight..Southwest winds 10 to 20 knots increasing to 20 to 25 knots toward daybreak. Mostly clear. Waves 2 to 4 feet building to 4 to 6 feet toward daybreak.
Friday..South winds to 30 knots veering southwest gales to 35 knots. Partly Sunny. A slight chance of rain showers in the afternoon. Waves 7 to 11 feet.
Friday night..Southwest winds around 25 knots veering northwest after midnight. Mostly cloudy with a chance of rain showers in the evening, then partly cloudy overnight. Waves 7 to 10 feet.
LMZ847 Expires:201711231615;;831399 FZUS53 KGRR 230836 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 336 AM EST Thu Nov 23 2017 For waters within five nautical miles of shore on Lake Michigan LMZ847-231615-

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 231143
afdgrr
area forecast discussion
national weather service grand rapids mi
643 am est Thu nov 23 2017
latest update...

aviation

Synopsis
Issued at 325 am est Thu nov 23 2017
a lengthy stretch of relatively benign weather is expected
through the end of the month with above normal temperatures and
very little precipitation. A weak cold front will bring a few
scattered light rain showers on Friday night and Saturday
otherwise dry weather is in store the next several days.

Short term (today through Saturday)
issued at 325 am est Thu nov 23 2017
weak isentropic lift early this morning is leading to an overcast mid
level cloud deck and some weak echoes aloft. This is mainly a
virga event this morning, followed by decreasing clouds from west
to east this afternoon with the passage of the warm front.

Have nudged up high temps a bit for Friday with strong southerly
flow in warm sector. Most locations should get into the lower 50s
and possibly even mid 50s, although the breezy conditions will
make it feel cooler.

Guidance showing only paltry rain amounts of less than a tenth of
an inch with the cold frontal passage on Friday night, primarily
north of i-96. Lake effect potential looks quite low behind the
front on Saturday due to shallow moisture and mild boundary layer
temps. Only chance pops are warranted Saturday north of i-96,
with the main threat of a few rain or mixed rain and snow showers
near and north of highway u.S. 10.

Long term (Saturday night through Wednesday)
issued at 325 am est Thu nov 23 2017
much of the long term looks to be quiet with above average
temperatures. The one period that could be a bit unsettled will be
from Tue night into thu.

Pcpn that will be possible at the end of the short term should come
to an end by the long term, which starts on Sat night. The upper
trough that will be over the area at the end of the short term will
be east of the cwfa by Sun morning with sfc ridging also building in.

We will see a nice push of warm air make it's way toward the area
for Mon and tue. This will come via fairly decent SW winds between
the departing high, and incoming sfc low. We should see a decent
amount of sunshine Mon and Tue as the flow is not really tapping
much gulf moisture.

Things become a bit uncertain from Tue night and beyond. There is
good agreement we will see a front push through first late tue. This
will usher in cooler air, but not have much pcpn with it with a lack
of a moist flow. The uncertainty comes as there looks to be
additional energy to our SW that could interact with the front at
some point, and another NRN wave diving se. The interaction of all
of these features will ultimately determine when and how much pcpn
occurs. The trend has been for a quicker initial frontal passage,
and less pcpn as everything will be focused further south.

Aviation (for the 12z tafs through 12z Friday morning)
issued at 643 am est Thu nov 23 2017
vfr conditions will prevail today and tonight. CIGS around 5000
ft this morning will scatter out from west to east after 18z,
then clr skies are expected tonight. Sfc winds will be from the
southwest around 10 kts.

Marine
Issued at 325 am est Thu nov 23 2017
southwest flow is increasing early this morning and small craft
advisory will be in effect today. The gradient relaxes tonight but
tightens again considerably on Friday in the warm sector. Gale
watch for Friday looks good, although have delayed it slightly
from earlier issuance with a start time now of 7 am Friday.

Hydrology
Issued at 308 pm est Wed nov 22 2017
a few river flood advisories remain in effect but water levels
will slowly fall through the rest of the week and weekend as
no significant precipitation is forecast through the weekend into
early next week.

Grr watches warnings advisories
Mi... None.

Lm... Gale watch from Friday morning through Friday evening for
lmz844>849.

Small craft advisory until 5 pm est this afternoon for
lmz844>849.

Synopsis... Meade
short term... Meade
long term... Njj
aviation... Meade
hydrology... Laurens
marine... Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 1 mi33 min W 17 G 19 39°F 1017.3 hPa (-1.1)26°F
HLNM4 - 9087031 - Holland, MI 32 mi51 min SSW 18 G 21 1016.4 hPa
LDTM4 - 9087023 - Ludington, MI 50 mi45 min WSW 5.1 G 15 38°F 25°F

Wind History for Holland, MI
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G34
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI6 mi38 minSW 1310.00 miOvercast39°F23°F53%1017 hPa

Wind History from MKG (wind in knots)
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Last 24hrN4NE34CalmW5W9W8SW4SW3SW6SW5S7SW11SW12SW9SW10W10
G20
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G17
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G18
SW12SW10W8SW9SW13
1 day agoW13
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NW11NW13N11N10N12
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N7N7N7N8N4N4N6
2 days agoSW17
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G30
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G39
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G34
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G32
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G29
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G31
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SW18
G31
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G22

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 (9,2,3,4)
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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.