Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Delton, 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 7:40AMSunset 5:16PM Tuesday November 21, 2017 4:20 PM EST (21:20 UTC) Moonrise 10:13AMMoonset 7:55PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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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LMZ845 South Haven To Holland Mi- 302 Pm Est Tue Nov 21 2017
.small craft advisory in effect through Wednesday morning...
Tonight..Northwest winds to 30 knots. Mostly cloudy with a chance of snow showers. Waves 6 to 8 feet.
Wednesday..Northwest winds 10 to 15 knots backing west late in the day. Mostly cloudy until midday then becoming mostly Sunny. Waves 3 to 5 feet subsiding to 2 to 3 feet late in the day.
Wednesday night..Southwest winds 10 to 20 knots increasing to 20 to 25 knots toward daybreak. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet building to 4 to 6 feet after midnight.
Thanksgiving day..West winds 15 to 25 knots. Mostly Sunny. Waves 4 to 6 feet.
LMZ845 Expires:201711220415;;758721 FZUS53 KGRR 212002 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 302 PM EST Tue Nov 21 2017 For waters within five nautical miles of shore on Lake Michigan LMZ845-220415-

7 Day Forecast for Marine Location Near Delton CDP, MI
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location: 42.49, -85.43     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 212000
afdgrr
area forecast discussion
national weather service grand rapids mi
300 pm est Tue nov 21 2017
latest update...

synopsis short term long term marine

Synopsis
Issued at 300 pm est Tue nov 21 2017
light lake effect snow showers and flurries will develop tonight
but with very little to no snow accumulation. A weakening clipper
system may also bring a few light snow showers and flurries mainly
north of muskegon during the early morning hours of thanksgiving
day.

Short term (this evening through Thursday night)
issued at 300 pm est Tue nov 21 2017
a relatively tranquil wx pattern will continue through the short
term fcst period. A few light northwest flow lake effect snow
showers and flurries will develop tonight as h8 temps fall to -11
to -13 c yielding delta t S in the upper teens.

However lake effect snow shower potential is mitigated by several
factors including lack of deeper moisture and low inversion heights
of only around 4-5 kft agl. Areas mainly near to west of us-131 will
have very light snow accumulations of under an inch. Very little to
no snow accumulation is fcst over our eastern fcst area.

Flurries or very light snow showers will linger near to west of us-
131 into early Wednesday morning before ending. Dry wx is forecast
Wednesday afternoon through Wednesday evening.

A weakening clipper system will bring a few light snow showers
and flurries to our northwest fcst area (mainly north of kmkg)
mainly between 06z and 12z Thursday with only a few tenths of an
inch of snow accumulation up there. Other than that tranquil and
dry wx is forecast for the thanksgiving holiday and for Thursday
night.

Long term (Friday through Tuesday)
issued at 300 pm est Tue nov 21 2017
no major systems are expected in the long term but the pattern of a
cold front every few days will continue. No significant cold air
outbreaks will occur since the polar jet stays north most of the
time which also means minimal lake effect precipitation.

Out next cold front is progged to come through on Friday night and
out ahead of it guidance brings in h8 temps around 10c on Friday.

That should lead to high temps at or above 50 although breezy
conditions will make it feel colder.

Model consensus is for high pops for light rain showers with fropa
on Friday night, then a chance of mixed rain and snow showers in the
colder air behind the front Saturday. Little or snow accumulations.

Sunday and Monday look dry with moderating temperatures as sfc high
pressure moves from the plains to the mid atlantic. Another cold
front approaches on Tuesday although timing is low confidence at
this time. ECMWF suggests highs in the 50s in the warm advection
ahead of this next front.

Aviation (for the 18z tafs through 18z Wednesday afternoon)
issued at 100 pm est Tue nov 21 2017
band of rain will produce areas of MVFR CIGS vsbys this
afternoon, mainly south and east of grr. Moderate icing in the
clouds is likely within this southeastward moving band of rain,
with current freezing levels around 2000 ft falling through the
afternoon.

The rain will be out of the area by 00z withVFR following in
it's wake tonight and Wednesday. However there will be lake effect
snow showers this evening that could occasionally briefly impact
mkg and azo with MVFR or lower conditions. West winds gusting to
25 kts will becoming northwest and subside to around 10 knots this
evening.

Marine
Issued at 300 pm est Tue nov 21 2017
a small craft advisory remains in effect through tonight into
early Wednesday morning. Wave models continue to suggest wave heights
will finally subside to below SCA criteria after 13z wed. However
wave heights will ramp back up on thanksgiving day when another
small craft advisory will likely be needed.

Hydrology
Issued at 100 pm est Tue nov 21 2017
several rivers remain at advisory action stage level as runoff
continues from rain that fell over the weekend. Water levels in
these and other rivers will remain fairly steady or slowly fall
through the end of the week. Rain and snow showers today and tonight
will only provide light amounts of precipitation, and will not have
an impact on water levels in rivers, creeks and streams. Additional
flooding is not expected.

A few more rounds of light rain snow are expected through the end of
the week, but should not have a significant impacts on river levels.

Grr watches warnings advisories
Mi... None.

Lm... Small craft advisory until 7 am est Wednesday for lmz844>849.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 46 mi41 min WNW 23 G 25 40°F
HLNM4 - 9087031 - Holland, MI 46 mi51 min WNW 24 G 29 1010.5 hPa
SJOM4 - St. Joseph, MI 63 mi81 min NNW 18 G 21 43°F 1011.5 hPa (+1.7)
MKGM4 - Muskegon, MI 70 mi31 min NNW 27 G 32 38°F 1012.6 hPa28°F

Wind History for Holland, MI
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S26
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G32
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G37
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G38
S34
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G38
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SW28
G37
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SW25
G34
SW28
SW22
G27
W19
G25
W20
W13
G17
NW22
G27
NW24
G29
NW24
1 day
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W16
W16
G21
W17
G21
W19
W20
G27
W22
W21
W21
W23
G28
SW20
G25
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G26
SW21
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S21
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G30
S25
G31
S24
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S24
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G27
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2 days
ago
N29
N22
G27
N23
G28
N28
G36
NW27
G36
N25
G35
NW32
NW27
NW28
G34
NW23
G30
NW22
G28
NW24
G29
NW21
G31
NW21
G29
NW22
NW20
G27
NW20
G27
NW22
G27
NW21
NW22
W20
G25
W19
G24
W21
NW17
G21

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
W K Kellogg Airport, MI16 mi28 minWSW 14 G 2010.00 miLight Rain38°F35°F89%1011.3 hPa
Kalamazoo/Battle Creek International Airport, MI18 mi28 minWSW 710.00 miOvercast39°F34°F82%1011.6 hPa

Wind History from BTL (wind in knots)
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Last 24hrS14
G23
S16S18S17
G27
SW16
G25
SW15
G24
SW18SW18
G26
SW18
G30
SW19
G28
SW21
G29
SW20
G26
SW17
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SW17SW13SW13SW15SW15
G21
SW17W17
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W10
G19
W11SW13W14
G20
1 day agoW11W9W6SW7SW7SW7SW7SW8SW8SW9S6S10SW9SW11SW9S10S14SW17SW14
G21
SW16
G21
SW18SW19SW16
G21
SW13
2 days agoN12
G23
N14
G21
N11N14
G19
NW7NW12
G19
NW18
G23
NW12
G19
NW16
G20
NW12NW13
G21
NW11NW8NW7W6W7NW15
G22
NW12
G19
NW11W14
G20
W12NW16
G21
W14W13

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 (16,3,4,5)
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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.