Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Holland, 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 6:07AMSunset 9:28PM Wednesday June 28, 2017 1:25 PM EDT (17:25 UTC) Moonrise 10:23AMMoonset 11:52PM Illumination 22% 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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LMZ846 Holland To Grand Haven Mi- 1141 Am Edt Wed Jun 28 2017
.small craft advisory in effect through Thursday afternoon...
Rest of today..South winds 20 to 25 knots. Mostly cloudy. A chance of showers through early afternoon, then a chance of showers and Thunderstorms in the afternoon. Waves 3 to 5 feet.
Tonight..Southwest winds to 30 knots. Mostly cloudy in the evening then becoming cloudy. A chance of showers and Thunderstorms. Waves 5 to 7 feet.
Thursday..Southwest winds 15 to 25 knots. Mostly cloudy with a chance of showers and Thunderstorms. Waves 4 to 6 feet subsiding to 2 to 3 feet late in the day.
Thursday night..Southwest winds 10 to 15 knots. Mostly cloudy in the evening then becoming cloudy. A chance of showers and Thunderstorms. Waves 1 to 3 feet.
LMZ846 Expires:201706282115;;957039 FZUS53 KGRR 281541 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1141 AM EDT Wed Jun 28 2017 For waters within five nautical miles of shore on Lake Michigan LMZ846-282115-

7 Day Forecast for Marine Location Near Holland, MI
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location: 42.77, -86.1     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 281154
afdgrr
area forecast discussion
national weather service grand rapids mi
754 am edt Wed jun 28 2017
latest update...

aviation

Synopsis
Issued at 330 am edt Wed jun 28 2017
periodic showers and thunderstorms are expected today through
Friday as an active frontal boundary and warmer and more humid
air impacts the area. Severe weather is possible on Friday.

Short term (today through Friday)
issued at 330 am edt Wed jun 28 2017
a lot of weather going on in the short term, but the best chance
of svr wx and heavy rainfall appears to be on Friday.

Incoming 40-60 kt swly low level jet will send higher
pwat theta-e air into the area today. The result will be numerous
to widespread showers moving into the area, arriving along the
lakeshore later this morning toward noon, and probably impacting
most areas north of i-94 this afternoon. Rainfall amounts expected
to range from only a few hundredths south of i-96 to a quarter to
half inch around ludington.

Little to no instability is progged today as the rain comes in
over top of a dry stable low level air mass with sfc dew points
currently in the 40s. So while likely pops are warranted
near north of i-96 today it looks like the thunder risk is quite
low. Main threat of thunder is toward evening around ludington per
latest rap13 MUCAPE progs. With all the clouds and showers moving
in today, and the rain falling into the drier low levels, suspect
high temps will be held down - in the low to mid 70s.

There's a good chance that tonight will be relatively quiet since
the models have been consistently showing the 50-60 kt low level
jet pointed at northern lake huron. With the sfc low and warm
front well to our north tonight, this suggests only scattered
showers tstms at best, with best coverage still in the NW cwfa
closer to the apchg sfc cold front. Instability tonight is still
shown to be rather limited, with mucapes under 1000 j kg. That
said we will have 50-60 kts at h8 and any convection could mix
down some gusty winds if the sfc based inversion is shallow
enough.

The sfc cold front stalls over the SRN cwfa on Thursday and could
be a focus for strong diurnal sfc based storms Thursday afternoon
and evening along i-94. Storms could persist in the SRN cwfa on
Thursday night as the front lifts back north as a warm front.

Best risk of severe weather and heavy rainfall is Friday as sfc
low tracks NE just west of us, and helps pull in sfc dew pts near
70. If we get any sfc heating and develop sfc based convection, it
could be a very active day since the warm front will be in the
vcnty and deep layer shear is progged to be 30-50 kts with capes
over 2000 j kg.

Long term (Friday night through Tuesday)
issued at 330 am edt Wed jun 28 2017
moderate to potentially strong instability will linger Friday
evening so showers and thunderstorms are likely to continue through
Friday evening before gradually tapering off as instability
diminishes overnight.

A drier airmass will move in behind this system for the weekend with
near normal temperatures for this time of year. However a northward
moving warm front will bring potential for more showers and
thunderstorms Monday night into Tuesday as elevated instability
ramps up north of the front. The relatively best chance for pcpn
will be over our southern fcst area in closer proximity to the sfc
low warm front.

Temperatures for early to mid next week will continue to average
close to normal but with increasing humidity. A high pressure ridge
will then gradually build in from the north and bring fair wx for
midweek.

Aviation (for the 12z tafs through 12z Thursday morning)
issued at 750 am edt Wed jun 28 2017
the winds will be the main aviation impact over the next 24
hours. South winds will increase to 10 to 20 knots by noon, with
frequent sfc gusts to 30 knots this afternoon into tonight.

Stronger gusts to 35-40 knots are possible at mkg. The winds
tonight at 2000 ft agl are shown to increase to 50-60 kts,
especially after midnight, leading to possible llws.

Showers will move in this afternoon from the west butVFR
cigs vsbys should still prevail. A brief period or two of MVFR or
lower vsbys could develop if heavier showers make it in. A risk
of thunder will develop tonight, mainly west of jxn lan, although
only sct'd coverage is expected with generallyVFR weather still
prevailing. Again, the gusty south-southwest winds will be the
main impact tonight.

Marine
Issued at 330 am edt Wed jun 28 2017
strong south winds today, shifting more swly tonight into
Thursday, will create hazardous waves of up to 8 feet on lake
michigan. The going small craft advisory and beach hazard headline
through Thursday look good.

Hydrology
Issued at 324 pm edt Tue jun 27 2017
the chippewa and pine river warnings have been downgraded to
advisories with continued improvement. The pine river levels are
dropping at a rate such that the advisory could potentially be
dropped by this time tomorrow. The chippewa river will experience a
more gradual fall. The majority of river in a stretch from ludington
eastward remain elevated, as well.

Additional rainfall is slated for late Wednesday into Thursday. This
midweek precipitation has the potential to delay improvement,
keeping rivers elevated. Additional rainfall could affect the area
again by Friday. Details in the exact placement of the heaviest rain
is still not certain, but the potential exists for more than 3
inches of rain to fall in some places over the next 5-7 days.

Further south, rivers are slightly above to near normal. Given
recent rainfall totals, river levels are almost certain to rise if
forecast precipitation amounts are achieved through the next week.

Those living near rivers should pay close attention to forecast
updates and monitor river trends closely.

Grr watches warnings advisories
Mi... Beach hazards statement through Thursday afternoon for miz037-
043-050-056-064-071.

Lm... Small craft advisory until 2 pm edt Thursday for lmz844>849.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 6 mi38 min S 19 G 21 70°F 1015.2 hPa
45029 13 mi16 min SSW 18 G 27 69°F 67°F4 ft1014.8 hPa56°F
SVNM4 - South Haven, MI 27 mi26 min S 14 G 17 72°F
45168 29 mi16 min S 14 G 18 70°F 67°F3 ft1016.1 hPa55°F
45161 31 mi26 min S 19 G 23 67°F 65°F4 ft1014.5 hPa (-1.7)
MKGM4 - Muskegon, MI 34 mi26 min SSW 21 G 25 67°F 1014.3 hPa (-1.9)58°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI1 mi33 minS 1410.00 miOvercast75°F54°F48%1016.2 hPa

Wind History from BIV (wind in knots)
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Last 24hrW13W13W12W9W8W9SW8SW5S3S3S3S5S6S5S5S5S6S6S8S10S13S15
G21
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1 day agoW12
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W9NW9NW7NW7NW4NW6W6NW7N5N4CalmCalmCalmCalmW5W10W14
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2 days agoW17
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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
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (13,3,4,5)
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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.