Friday, October20, 2017 L-36.com


Marine Weather and Tides
Muskegon Heights, 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 8:04AMSunset 6:54PM Friday October 20, 2017 2:01 PM EDT (18:01 UTC) Moonrise 7:43AMMoonset 6:48PM 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- 1205 Pm Edt Fri Oct 20 2017
.small craft advisory in effect through Saturday evening...
Rest of today..South winds 15 to 25 knots. Sunny. Waves 2 to 4 feet.
Tonight..South winds 15 to 25 knots. Mostly clear. Waves 3 to 5 feet.
Saturday..South winds 15 to 25 knots. Mostly Sunny. Waves 4 to 6 feet.
Saturday night..South winds 15 to 20 knots. Partly cloudy in the evening, then mostly cloudy with a chance of showers overnight. Waves 4 to 6 feet.
LMZ847 Expires:201710202130;;142322 FZUS53 KGRR 201605 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1205 PM EDT Fri Oct 20 2017 For waters within five nautical miles of shore on Lake Michigan LMZ847-202130-

7 Day Forecast for Marine Location Near Muskegon Heights, MI
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location: 43.23, -86.2     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 201747
afdgrr
area forecast discussion
national weather service grand rapids mi
147 pm edt Fri oct 20 2017
latest update...

aviation hydro

Synopsis
Issued at 312 am edt Fri oct 20 2017
dry conditions are expected into Saturday night. High temperatures
will be 10 to 15 degrees above normal Friday and Saturday with highs
in the lower to mid 70s. Sunday into next week will be unsettled
with frequent rain showers. Much of next week will also be
considerably cooler with highs in the 50s.

Short term (today through Saturday night)
issued at 312 am edt Fri oct 20 2017
no impact weather expected. Only change of note was to bump up
Friday and Saturday high temperatures to the mid 70s for much of the
area. This is a bit greater than model guidance and was done in
coordination with the detroit and gaylord offices.

Rainshowers are expected to have spread eastward into our waters and
western zones by early Sunday morning. Timing with this has been
quite consistent with successive model runs. Therefore, confidence
with timing the onset of this precipitation is currently good.

Long term (Sunday through Thursday)
issued at 312 am edt Fri oct 20 2017
confidence is high that we'll see rain Sunday as a cold front moves
across the state. The GFS and ECMWF haven't changed much in their
solutions. The GFS is still a bit quicker and the ECMWF continues to
develop a wave on the front over the souther u.S. Before moving it
north along the frontal boundary. The change from yesterday is that
the bulk of the rain from this wave is now depicted over
southeast lower mi. Thus the chances for significant
rainfall... Over an inch... Is lower than yesterday. Still think we
could see a third of an inch or so from this system Sunday.

Chances for thunderstorms aren't zero Sunday, but aren't high
either. Li's fall to around 1c as the front passes through. There
may be a better chance at seeing convection along the lake shore
Tuesday when li's fall to around -2c. Lapse rates will steepen quite
a bit (~8c km) when the colder air aloft moves over the warm lake
water. Opted to include a isolated mention of storms Tuesday
afternoon along the lake shore.

An impressive upper low will develop over the great lakes mon-wed
resulting in more showers and much cooler temperatures. This cool
down has also been well advertised by the models for several days
and highs in the 50s are expected tue-thu. We're likely to see
temperatures fall into the 30s Tue night and Wed night.

Aviation (for the 18z tafs through 18z Saturday afternoon)
issued at 147 pm edt Fri oct 20 2017
vfr conditions will continue through Saturday. Southerly sfc
winds will be 10-20 kts during the day and 5-10 kts at night.

Marine
Issued at 312 am edt Fri oct 20 2017
we have made some adjustments to the small craft advisory. First,
it's been expanded southward to grand haven based on ww3 guidance.

Second, we have made the beginning time earlier based on ww3
guidance and also on the ludington buoy, which already has reported
4 foot waves north of pentwater.

Hydrology
Issued at 147 pm edt Fri oct 20 2017
dry weather will persist through Saturday. A cold front passing
through the region will then provide a high coverage of showers
Sunday and Sunday night. Rainfall amounts will generally run about
0.50 inches, but locally heavier pockets of rain will exist. These
pockets could bring rain amounts in excess of one inch. These
heavier amounts could cause rivers, creeks, and streams to rise,
especially in the kalamazoo river basin where water levels are still
high following heavy rain last weekend.

The frontal boundary may then stall over either michigan or the
eastern great lakes Monday into Tuesday, and become a focus for
additional rainfall. This rainfall could potentially become heavy
(over an inch of rain) and could lead to additional rises in rivers,
creeks, and streams. Changes to the rainfall forecast Monday into
Tuesday are possible.

Grr watches warnings advisories
Mi... None.

Lm... Small craft advisory until 8 pm edt Saturday for lmz847>849.

Synopsis... Tjt
short term... Tjt
long term... 04
aviation... Meade
hydrology... Hlo
marine... Tjt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 7 mi32 min S 13 G 16 64°F 1020.6 hPa57°F
45161 9 mi62 min S 12 G 16 62°F 60°F3 ft1020.9 hPa (-0.8)
45029 23 mi22 min SSW 9.7 G 12 63°F 60°F3 ft1020.8 hPa54°F
HLNM4 - 9087031 - Holland, MI 32 mi44 min S 12 G 13 63°F 1020.4 hPa55°F
LDTM4 - 9087023 - Ludington, MI 51 mi44 min SSW 14 G 19 65°F 53°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI5 mi67 minS 1210.00 miPartly Cloudy68°F53°F59%1021.4 hPa
Fremont Municipal Airport, MI18 mi67 minSSW 9 G 1710.00 miFair73°F51°F47%1021 hPa

Wind History from MKG (wind in knots)
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Last 24hrW10W10W10W7SW8SW3S3S4S3CalmSE7SE5CalmE3E4SE5CalmSE4SE3S3S6S11S10S12
1 day agoS19
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W11W9W10NW6NW8--W9W9
2 days agoSW18SW17SW15
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S12S11S9S10SW10S9SW12SW13SW12SW12SW13SW10SW12SW14S11S13S15S16
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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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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (14,3,4,5)
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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.