Monday, November20, 2017 L-36.com


Marine Weather and Tides
Grand Ledge, 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 7:36AMSunset 5:12PM Monday November 20, 2017 1:02 AM EST (06:02 UTC) Moonrise 9:20AMMoonset 7:06PM Illumination 2% 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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LMZ846 Holland To Grand Haven Mi- 927 Pm Est Sun Nov 19 2017
.small craft advisory in effect through Monday afternoon...
.gale watch in effect from Monday afternoon through Tuesday afternoon...
Rest of tonight..West winds to 30 knots. Partly cloudy. Waves 6 to 8 feet.
Monday..Southwest winds to 30 knots increasing to gales to 35 knots late in the day. Sunny. Waves 6 to 9 feet.
Monday night..Southwest gales to 40 knots. Partly cloudy. Waves 9 to 13 feet.
Tuesday..West gales to 35 knots. Mostly cloudy with a chance of rain showers. Waves 8 to 12 feet.
LMZ846 Expires:201711201015;;673779 FZUS53 KGRR 200227 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 927 PM EST Sun Nov 19 2017 For waters within five nautical miles of shore on Lake Michigan LMZ846-201015-

7 Day Forecast for Marine Location Near Grand Ledge, MI
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location: 42.75, -84.75     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 200423
afdgrr
area forecast discussion
national weather service grand rapids mi
1123 pm est Sun nov 19 2017
latest update...

aviation

Synopsis
Issued at 315 pm est Sun nov 19 2017
a high pressure ridge will build in and bring fair weather tonight
through Monday. However it will become breezy Monday through
Monday night out ahead of an approaching clipper system. The
clipper system will bring a few light rain showers Tuesday that
will change over to light snow showers and flurries late Tuesday
through Tuesday night. Tranquil weather will return for mid to
late week.

Short term (this evening through Tuesday night)
issued at 315 pm est Sun nov 19 2017
short term fcst concerns are fairly minimal with a rather tranquil
wx pattern developing for the upcoming week. Any lingering
flurries late this afternoon will taper off early this evening as
weak ridging builds in.

The ridge will bring fair wx late tonight through Monday night
but it will become very breezy Monday as strong SW winds develop
ahead of the approaching clipper system.

The clipper will bring a few light rain showers Tuesday followed
by light snow showers and flurries after FROPA as NW flow caa
occurs. Only a dusting of snow to no snow accumulation at all is
anticipated given low inversion heights and lack of deeper moisture.

Long term (Wednesday through Sunday)
issued at 315 pm est Sun nov 19 2017
a couple clippers move across southern canada in the extended with
the usual model timing differences in such a fast flow regime. The
only targets of opportunity aimed at were to add some light lake
enhanced snow showers Wednesday morning before the dgz dries out and
inversion heights crash below 5 kft agl... And to lower pops Friday
night as best lift and deeper moisture remain well north of lower
michigan, with only a period of light warm air advection precip
expected.

We have left Thursday dry for now but will have to watch a weak
clipper's trailing cold front moving through during the afternoon or
evening which could bring some light snow or mix to the northern
zones.

Aviation (for the 06z tafs through 06z Monday night)
issued at 1123 pm est Sun nov 19 2017
broken cigs AOA 10k ft are expected overnight.

Marine
Issued at 315 pm est Sun nov 19 2017
the small craft advisory remains in effect through mid afternoon
Monday. In addition a gale watch has been issued for late Monday
afternoon through late Tuesday afternoon as winds and waves will
ramp up out ahead of a clipper system Monday night and after the
clipper moves through Tuesday.

Hydrology
Issued at 1145 am est Sun nov 19 2017
numerous streams and rivers across the southern half of lower
michigan will continue to show the affects of Friday's and
Saturday's rainfall. Rises are expected through the weekend before
rivers stabilize next week.

A quieter pattern is forecast through the thanksgiving day
period. Given current forecasts and river trends, all sites should
remain below flood criteria. Impacts are expected to remain minor
and immediately along streams and rivers.

Grr watches warnings advisories
Mi... None.

Lm... Gale watch from Monday afternoon through Tuesday afternoon for
lmz844>849.

Small craft advisory until 4 pm est Monday for lmz844>849.

Synopsis... Laurens
short term... Laurens
long term... Ostuno
aviation... 04
hydrology... Jam
marine... Laurens


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 78 mi44 min WSW 23 G 26 1015.6 hPa
MKGM4 - Muskegon, MI 90 mi32 min WNW 21 G 24 38°F 1016.8 hPa30°F
SBLM4 - Saginaw Bay Light #1, MI 91 mi62 min WSW 16 G 21 30°F 1013.5 hPa (+0.3)

Wind History for Holland, MI
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NW28
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NW23
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NE5
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N29
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G36
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N25
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E11
G15
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G11
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI8 mi69 minSW 610.00 miOvercast29°F23°F78%1016.6 hPa
Charlotte, Fitch H Beach Airport, MI13 mi68 minSW 510.00 miOvercast30°F22°F72%1015.2 hPa
Mason, Mason Jewett Field Airport, MI21 mi69 minWSW 510.00 miOvercast32°F23°F71%1015.6 hPa
Ionia County Airport, MI21 mi66 minSW 610.00 miOvercast30°F23°F77%1014.9 hPa

Wind History from LAN (wind in knots)
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Last 24hrNW11
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W12W11W13W17
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W8W7SW5SW5SW6SW6
1 day agoS9S9SW11S7SW5S3S3CalmN3CalmNE4N8N12N11N12N12
G18
N11
G20
NW10NW12NW13NW12
G18
NW13NW10
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NW11
2 days agoCalmCalmE3E3E3E8SE9S10S10SE14
G21
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S12S15S13
G19
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G18
SE12S16
G24
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G24
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G21
S10

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 (1,6,7,8)
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Ground Weather Radar Station Detroit, 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.