Monday, August20, 2018 L-36.com


Marine Weather and Tides
Fennville, MI

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:55AMSunset 8:39PM Monday August 20, 2018 3:02 AM EDT (07:02 UTC) Moonrise 3:52PMMoonset 12:48AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 949 Pm Edt Sun Aug 19 2018
Rest of tonight..Northeast winds 5 to 10 knots veering southeast 10 to 15 knots after midnight. Partly cloudy. Waves 1 foot or less.
Monday..Southeast winds 10 to 15 knots. Mostly cloudy. A chance of showers and Thunderstorms in the afternoon. Waves 1 foot or less.
Monday night..Southeast winds 10 to 15 knots. Showers and Thunderstorms. Waves 1 foot or less.
Tuesday..West winds 10 to 20 knots veering north 15 to 25 knots, then increasing to 30 knots late in the day. Showers and Thunderstorms likely until midday, then a chance of showers and Thunderstorms in the afternoon. Waves around 1 foot building to 5 to 7 feet.
LMZ845 Expires:201808200915;;922768 FZUS53 KGRR 200149 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 949 PM EDT Sun Aug 19 2018 For waters within five nautical miles of shore on Lake Michigan LMZ845-200915-


7 Day Forecast for Marine Location Near Fennville, MI
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location: 42.65, -86.09     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 200402
afdgrr
area forecast discussion
national weather service grand rapids mi
1202 am edt Mon aug 20 2018
latest update...

aviation

Synopsis
Issued at 324 pm edt Sun aug 19 2018
a brief shower or thunderstorm is possible this evening along the
lake breeze, otherwise partly cloudy skies will prevail through
Monday. Widespread rainfall is expected Monday night and Tuesday as
low pressure crosses lower michigan. Cooler and drier air will flow
south into the state behind the low. Highs in the upper 70s and less
humidity are expected for middle to end of the week before summer
time heat builds in for the weekend.

Short term (this evening through Tuesday night)
issued at 324 pm edt Sun aug 19 2018
forecast concerns deal with the rain potential Monday night and
Tuesday.

Latest vis loop shows the lake breeze pushing inland across the lake
shore counties. The 3km NAM has been showing some convection firing
along this boundary for the past couple of days. To a lesser extent,
so has the hrrr. The lake breeze will soon start moving over an area
that has a thermal boundary due to differential heating between
areas that saw fog early today and those that didn't. We'll leave a
slight chance pop in through 00z for the potential.

The ecmwf, gfs, NAM are all in good agreement with the track of the
low from northern missouri across lower michigan Monday night and
Tuesday. Short wave support aloft, coupled with abundant moisture
(pwats climb to around 2 inches) should create favorable conditions
for convective development Monday evening and Tuesday. Shear values
aren't bad... 25-35knots... But instability or lack thereof will be a
limiting factor Monday evening and Tuesday. The severe potential
looks low.

Precipitation will diminish late Tuesday and Tuesday night as low
moves east and cooler and drier air moves in.

Long term (Wednesday through Sunday)
issued at 324 pm edt Sun aug 19 2018
the sfc low is pulling away by Wednesday with much cooler airmass
moving in. Upper level troughing and cyclonic flow could result in
some leftover showers Wednesday morning but model soundings are very
dry by that time, so went with a dry forecast.

Fair weather under sfc ridging and rising heights expected through
the end of the week, with some warm advection showers arriving
Friday evening and continuing into Saturday as shortwave trough
axis moves through. Showers should be tapering off Sunday in flat
upper ridging.

Aviation (for the 06z tafs through 06z Monday night)
issued at 1145 pm edt Sun aug 19 2018
vfr conditions will slowly deteriorate to a mix ofVFR MVFR with
patchy ifr possible during the early morning hours Monday due to
the development of patchy fog and some low clouds. Conditions will
then improve toVFR by mid morning as low clouds patchy fog
dissipates.VFR conditions will then continue through Monday
afternoon.

Scattered showers and thunderstorms will gradually move in from
the southwest and likely affect all of the terminals Monday
evening. Brief reductions to ifr MVFR are possible as storms and
heavier showers move through.

Marine
Issued at 324 pm edt Sun aug 19 2018
quiet conditions are expected on the lake tonight and Monday. Winds
may increase significantly Tuesday and potentially be near gale
force Tuesday afternoon. North winds to 30 knots are possible
Tuesday which, if it occurs, would cause waves to increase from 2 to
4 feet to 5 to 9 feet.

Longshore and structural currents may create hazardous beach
conditions Tuesday with the north side of piers especially affected.

Hydrology
Issued at 324 pm edt Sun aug 19 2018
significant rainfall is possible Monday night and Tuesday. An inch
to an inch and a half of rain is possible during this time. Within
bank rises are possible by mid week on area rivers. Additionally,
locally heavy rainfall could create ponding on roads and other low
lying areas.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... 04
short term... 04
long term... Ostuno
aviation... Laurens
hydrology... 04
marine... 04


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 11 mi38 min ESE 8.9 G 12 73°F 1015 hPa64°F
SVNM4 - South Haven, MI 20 mi112 min ESE 6 G 8 71°F
45029 20 mi22 min ESE 7.8 G 9.7 73°F 75°F1 ft1015 hPa63°F
45168 22 mi22 min ESE 5.8 G 7.8 71°F 74°F1 ft1015.1 hPa63°F
45161 39 mi22 min SE 9.7 G 12 71°F 75°F
MKGM4 - Muskegon, MI 42 mi22 min SE 6 G 8 70°F 1015 hPa63°F
SJOM4 - St. Joseph, MI 44 mi62 min Calm G 2.9 71°F 1016.6 hPa (+0.7)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI7 mi69 minN 010.00 miFair67°F62°F84%1015.7 hPa
South Haven, South Haven Area Regional Airport, MI22 mi67 minESE 310.00 miFair69°F65°F90%1015.6 hPa

Wind History from BIV (wind in knots)
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Last 24hrE3CalmCalmCalmE4SE3E33E3E534NW7NW74NW4CalmCalmCalmCalmCalmSE5CalmSE3
1 day agoCalmCalmCalmCalmCalmN5333CalmCalmW55NW6NW7NW6N8NW4N3CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmN3N4N5NW4N3544NE3CalmCalmCalmCalmCalmCalmCalm

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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wmap_A
GOES Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (3,6,7,8)
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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.