Monday, May21, 2018 L-36.com


Marine Weather and Tides
Grand Haven, MI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:13AMSunset 9:10PM Monday May 21, 2018 11:10 AM EDT (15:10 UTC) Moonrise 11:42AMMoonset 1:17AM Illumination 42% Phase: First Quarter Moon; Moon at 7 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- 1048 Am Edt Mon May 21 2018
Rest of today..East winds 15 to 20 knots. Rain showers through early afternoon, then rain showers and a slight chance of Thunderstorms in the afternoon. Patchy fog through the day. Waves around 1 foot.
Tonight..East winds 10 to 20 knots. Rain showers likely and a slight chance of Thunderstorms in the evening, then a chance of rain overnight. Patchy fog through the night. Waves around 1 foot.
Tuesday..Northeast winds around 10 knots backing northwest. Mostly cloudy. Waves 1 to 2 feet.
Tuesday night..Northwest winds 5 to 10 knots. Partly cloudy. Waves around 1 foot.
LMZ846 Expires:201805212115;;306326 FZUS53 KGRR 211448 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1048 AM EDT Mon May 21 2018 For waters within five nautical miles of shore on Lake Michigan LMZ846-212115-

7 Day Forecast for Marine Location Near Grand Haven, MI
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location: 43.05, -86.36     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 211156
afdgrr
area forecast discussion
national weather service grand rapids mi
756 am edt Mon may 21 2018
latest update...

aviation

Synopsis
Issued at 330 am edt Mon may 21 2018
low pressure moving northeast from missouri will bring widespread
rain and cool temperatures today and tonight. Clouds will linger
in the wake of this system on Tuesday then sunny and warm weather
is expected Wednesday and Thursday. Memorial day weekend starts
out warm and humid with scattered showers and thunderstorms, then
ends up dry for the holiday.

Short term (today through Wednesday)
issued at 330 am edt Mon may 21 2018
big slug of rain headed our way today as shortwave ejects
northeast from the plains and draws up pwats over 1.5 inches via
30kt low level jet. Will have categorical pops spreading in from
southwest to northeast this morning, then expect a persistent cool
rain this afternoon and evening which could even be heavy at
times once the higher h8 theta-e air arrives from the south.

Widespread rainfall amounts of one half to one inch are expected,
although some streaks of locally heavier amounts over an inch are
quite possible. MUCAPE progs argue against much coverage of tstms
this afternoon and evening, but will continue to carry a slgt
chance as some weak elevated instability does come through later
in the day and evening.

Heaviest widespread rain departs after midnight, put expect some
lingering scattered showers and areas of drizzle fog. Low clouds
will linger most of the day Tuesday, although some clearing may
develop later in the day especially over NRN and WRN sections.

Prospects for sunshine are much better on Wednesday (after patchy
morning stratus fog dissipates) with drier air mass and sfc ridge
overhead.

Long term (Wednesday night through Sunday)
issued at 330 am edt Mon may 21 2018
chances for rain aren't great during the long term, but probably
highest over the northwest cwa. Initially, high pressure over
michigan will drift east late Thursday. Developing low pressure over
the plains will generate showers storms along the mississippi valley
as the LLJ strengthens. An upper trough moving across the northern
tier of states will push the sfc low eastward and the precipitation
ahead of it will move toward the cwa.

The highest chance of precipitation looks to be late Saturday as the
trailing cold front moves across the cwa, but pops will linger into
Sunday as the upper support moves through.

Highs through the period will be in the 76 to 81 range.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 754 am edt Mon may 21 2018
variable flight conditions exist this morning, ranging fromVFR
to ifr lifr where areas of fog stratus are present. Conditions
will trend toward predominately MVFR by afternoon everywhere as
rain becomes more widespread, then mostly ifr by later in the day
and this evening as the rain continues and is occasionally heavy.

Late tonight there will probably be quite a bit of lifr
developing as CIGS further lower and areas of fog drizzle develop
behind the departing area of heavier rain.

Marine
Issued at 330 am edt Mon may 21 2018
may be dealing with areas of fog over lake michigan over the next
48 hours before high pressure delivers a drier air mass on
Wednesday. Otherwise winds and waves expected to remain below
advisory criteria.

Hydrology
Issued at 1127 am edt Sun may 20 2018
many rivers especially in southern michigan are running much above
normal for this time of year, with lowland nuisance flooding still
occurring at several points. Most river levels are falling.

Showers on Monday have the potential to produce around a half inch
of rain on average in southern michigan, though it wouldn't be
surprising if some locations picked up closer to an inch.

Depending on the basins where any heavier rain may fall, this
could prolong the nuisance flooding. The middle part of the week
will be dry, then rain chances return toward the end of the week.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Meade
short term... Meade
long term... 04
aviation... Meade
hydrology... Cas
marine... Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45161 9 mi31 min ESE 5.8 G 7.8 1 ft
45029 11 mi21 min E 9.7 G 12 53°F 46°F1 ft1022.4 hPa47°F
MKGM4 - Muskegon, MI 12 mi21 min ESE 13 G 16 58°F 1022.3 hPa48°F
HLNM4 - 9087031 - Holland, MI 21 mi47 min E 11 G 16 57°F 1021.2 hPa54°F
SVNM4 - South Haven, MI 45 mi31 min SE 6 G 8 58°F
45168 45 mi21 min E 7.8 G 9.7 55°F 47°F1 ft1022.5 hPa51°F
LDTM4 - 9087023 - Ludington, MI 62 mi41 min E 6 G 9.9 57°F 49°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI10 mi16 minESE 1010.00 miLight Rain59°F48°F67%1022.5 hPa

Wind History from MKG (wind in knots)
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Last 24hrN63CalmNE6E5CalmW4W3NW3CalmCalmCalmCalmCalmCalmNE6E5NE6E5E4E7E11E11E10
1 day agoS5SW9W9NW9NW7NW4NW8W12NW5W4W6W6N9N7N7NW7NW7N7N7NE5N7N10NE5NE4
2 days agoE18
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E10E11E9E9E9E7E8E8E5E6E5E4E4SE3

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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GOES Local Image of GreatLakes    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (11,2,3,4)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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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.