Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Holland, MI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:46AMSunset 8:38PM Sunday April 23, 2017 3:44 PM EDT (19:44 UTC) Moonrise 4:28AMMoonset 4:21PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 1018 Am Edt Sun Apr 23 2017
Rest of today..Southwest winds around 10 knots becoming west. Sunny. Waves 1 to 2 feet.
Tonight..Northwest winds 5 to 10 knots veering east 5 to 15 knots after midnight. Mostly clear. Waves around 1 foot.
Monday..Southeast winds 10 to 15 knots. Sunny. Waves around 1 foot.
Monday night..Southeast winds around 15 knots. Partly cloudy. Waves 1 to 2 feet.
LMZ846 Expires:201704232130;;144866 FZUS53 KGRR 231418 NSHGRR NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1018 AM EDT SUN APR 23 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ846-232130-

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 231904
afdgrr
area forecast discussion
national weather service grand rapids mi
304 pm edt Sun apr 23 2017
latest update...

synopsis/short term/long term/fire weather/marine

Synopsis
Issued at 304 pm edt Sun apr 23 2017
the area will remain in between systems through Tuesday. This will
allow for a mainly dry period through then with a good deal of
sunshine and very nice spring temperatures. Clouds will be on the
increase on Tuesday, and areas toward ludington will see a small
chance of rain arrive Tuesday night, with the rest of the area
seeing better chances for showers and storms late Wednesday into
Thursday.

Cooler weather will follow for the end of the week. Another surge of
warmer air and shower/storm chances will arrive for next weekend.

Short term (this evening through Tuesday night)
issued at 304 pm edt Sun apr 23 2017
challenges in the first portion of the short term are rather limited
with dry conditions expected. The challenges come starting on
Tuesday, and continue through Tuesday night with shower/storm
chances needing to be determined. We are not expecting much in the
way of impacts through Tuesday night.

Very dry airmass in place this afternoon with plenty of sunshine and
mixing taking place. This will generally continue with one small
caveat. A weakening front is dropping south through the area with
slightly higher dew points coming in on n/ne flow off of the lakes.

This slightly cooler air and moisture from the lakes could allow for
some fog/stratus tonight as the atmosphere cools. We are not sure of
this as good mixing and the dry air in place may take care of it.

Any fog/stratus that would occur tonight would dissipate quickly mon
morning.

The models are trying to bring some very light QPF in late Mon night
into tue. We are going to hold with a dry forecast for the time
being. Forecast soundings indicate that there will be a very shallow
layer of moisture around 3-5k feet. This looks too shallow to
generate any rain, especially when we have dry antecedent conditions
to start with.

The rain chances will increase some Tuesday night, and be limited to
mainly the far NW corner of the cwfa. It is there that will be in
closer proximity to the frontal system across wi and eastern upper
michigan, and near the nose of the low level jet that will be moving
to the ne. We just have a chance of showers and storms for now, as
the bulk of the rain should be N and W of the cwfa.

Long term (Wednesday through Sunday)
issued at 304 pm edt Sun apr 23 2017
models are pointing toward two systems affecting the great lakes
during the long term period. Both have the potential to bring quite
a bit of rain to the cwa.

The first system is a wave that develops on the southern end of a
cold front that will move northeast toward wi/il Wednesday. We'll be
on the east side of this system initially which will result a strong
surge of moisture and instability from the gulf. The GFS is a bit
farther east than the ECMWF but are similar in strength and track.

So, confidence is fairly high that we'll see showers/storms
Wednesday and Wednesday night as this system moves through. Shear
values are progd in the 50-60kt range Wednesday afternoon while we
sit in the warm sector, so we'll need to watch for the potential for
strong/severe storms.

The next system comes in Friday night/Saturday. It's another system
that will move north on the west side of lake michigan. The models,
ecmwf in particular, show a very active warm front Saturday. The gfs
meanwhile is a bit quicker pushing the warm front through. SW lower
michigan will be in a prime location for another round of
significant rainfall as these showers/storms move/develop northward
through the region. The trailing cold front will move through late
Sunday if current model trends hold. Next weekend looks like it
could be rather wet. Shear values again look fairly strong so a
strong/severe potential looks to exist next weekend too.

Wednesday will be the warmest day with highs in the mid 70s. Then
after the cold front moves through, highs will fall back to the 50s
Thursday and Friday before climbing into the 60s Saturday and Sunday.

Aviation (for the 18z tafs through 18z Monday afternoon)
issued at 140 pm edt Sun apr 23 2017
prevailingVFR into Monday with wnw wind 5 to 10 kt this
afternoon veering NE after 03z as a shallow wedge of colder air
off lake huron slides through. Moisture below 1 kft increases
overnight and may be enough for some low level clouds to form,
though not confident in if sky coverage will be enough for ifr.

Marine
Issued at 304 pm edt Sun apr 23 2017
the flow will become offshore tonight, and remain the case through
Monday. The winds may approach 20 knots on Monday as winds start to
move in late in the day. Waves will be limited by the offshore flow
and the stable nature of the warmer air over the cooler waters. We
could be looking at possible small craft advisory conditions mon
night and beyond with stronger systems approaching the area.

Fire weather
Issued at 304 pm edt Sun apr 23 2017
a couple of days without rain combined with plenty of sunshine and a
dry air mass has allow rh's to drop down below 30% this afternoon at
many locations. Fire danger is not too bad with winds staying below
10 knots at most locations. Conditions are a little breezy toward
mt. Pleasant, big rapids, and alma.

We expect close to a repeat on Monday with regards to rh's as we
should mix down dry air. Winds should remain on the lighter side and
be more from the east/southeast. We do expect better moisture will
move in over the area for Tuesday with southerly winds drawing
moisture northward.

Hydrology
Issued at 140 pm edt Sun apr 23 2017
the 6 river forecast points out of their banks are at crest or
already falling. Dry weather through Tuesday will allow water
levels to recede below bankfull on some but not all rivers. An
active weather pattern is likely starting Wednesday and continuing
into the early part of next week. There is a chance for basin-
average rainfall to exceed 1-2 inches by next Sunday, though there
is low confidence exactly where the axis of heaviest rain will
set up. A number of rivers will still be running higher than
normal going into this active pattern, so they will be susceptible
to minor flooding again if heavy rain does occur.

Grr watches/warnings/advisories
Mi... None.

Lm... None.

Synopsis... Njj
short term... Njj
long term... 04
aviation... Cas
fire weather... Njj
hydrology... Cas
marine... Njj


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 6 mi44 min SW 1.9 G 2.9 50°F 18°F
45029 13 mi24 min SW 3.9 G 3.9 49°F 47°F1 ft1019.6 hPa32°F
SVNM4 - South Haven, MI 27 mi44 min WSW 2.9 G 2.9 51°F
45168 29 mi24 min WNW 1.9 G 3.9 51°F 51°F1019.4 hPa34°F
45161 31 mi44 min S 7.8 G 7.8 46°F 46°F1 ft1018.9 hPa (-1.2)
MKGM4 - Muskegon, MI 34 mi34 min SSW 8.9 G 8.9 52°F 1019.1 hPa39°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 mi51 minWNW 910.00 miFair63°F34°F34%1017.2 hPa

Wind History from BIV (wind in knots)
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Last 24hrW10NW9NW10NW9NW7NW5NW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5W6W5W7W7W7NW9
1 day agoNW12
G20
NW9NW8NW10N7NW4CalmCalmNE5NE4N4N4N4N4N3CalmCalmNE7N6E5E866W10
2 days agoNW11
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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 (15,3,4,5)
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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.