Monday, May29, 2017 L-36.com


Marine Weather and Tides
Fennville, MI

Version 3.4
What's New / NOTES
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 9:16PM Monday May 29, 2017 1:50 AM EDT (05:50 UTC) Moonrise 9:19AMMoonset 12:00AM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 928 Pm Edt Sun May 28 2017
Rest of tonight..Southwest winds 10 to 15 knots. Partly cloudy. A slight chance of showers and isolated Thunderstorms in the evening. Patchy fog through the night. Waves 1 to 2 feet.
Memorial day..Southwest winds 15 to 20 knots. Partly Sunny with a slight chance of showers and Thunderstorms. Waves 1 to 3 feet.
Monday night..West winds 15 to 20 knots. Partly cloudy. A slight chance of showers and Thunderstorms in the evening. Waves 2 to 3 feet.
Tuesday..Southwest winds 15 to 20 knots. Partly Sunny. A chance of showers and a slight chance of Thunderstorms in the afternoon. Waves 2 to 3 feet.
LMZ845 Expires:201705290915;;372096 FZUS53 KGRR 290128 NSHGRR NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GRAND RAPIDS MI 928 PM EDT SUN MAY 28 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ845-290915-

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 290522
afdgrr
area forecast discussion
national weather service grand rapids mi
122 am edt Mon may 29 2017
latest update...

aviation

Synopsis
Issued at 330 pm edt Sun may 28 2017
a few showers or storms will be possible over the next couple of
days, but the main time frames will be Monday and then again Tuesday
afternoon and evening. Another rain chance will come Thursday night
and Friday.

Temperatures will stay rather uniform, with highs in the mid 60s to
mid 70s.

Update
Issued at 935 pm edt Sun may 28 2017
just enough leftover instability around for an isolated shower or
thunderstorm to exist over lake mi this evening. As the
instability decreases... The risk for precipitation will decrease
as well. The main change with the forecast was to show a small
chance for a shower or thunderstorm over the nearshore waters and
lakeshore counties.

Update issued at 734 pm edt Sun may 28 2017
the main change to the forecast was to reflect less in the way of
cloud cover. I also added some fog to the nearshore forecast.

Satellite trends show less clouds over the region than currently
forecasted. Also some fog was seen on the visible imagery... Along
with the webcams supporting it for parts of the nearshore waters.

Short term (this evening through Tuesday night)
issued at 330 pm edt Sun may 28 2017
storms will exit the area this evening, leaving behind impacts from
an upper low into Tuesday night.

Once the showers and storms exit we will be dry for the remainder of
the night. Slightly cooler with lows of 50 to 55.

Memorial day will see scattered showers around as we get into the
impacts of the upper low over the northern lakes. Troughs will be
passing through from time to time, and along with some diurnal
instability, we should see a peak in the showers in the afternoon on
Monday.

Same GOES for Tuesday with showers increasing in coverage through
the afternoon. Looks like a trough GOES through later in the day,
so these showers storms should linger into the evening.

Despite the showers most areas will only see a tenth of an inch or
less through Tuesday evening. Temps will slowly slip back, from 70
to 75 on Monday, to the 60s on Tuesday.

Long term (Wednesday through Sunday)
issued at 330 pm edt Sun may 28 2017
some gradual improvement will occur in the extended period as an
upper low slowly moves east. After a few diurnally enhanced showers
on Wednesday, there should be a dry period as sfc high builds in and
heights rise Wednesday night into early Thursday, before area of
isentropic ascent in warm advection pattern brings the chance of
some showers late Thursday.

There is low confidence in the forecast by end of the week and into
the weekend as ensemble spread increases. Canadian sfc high may hold
on for Friday and Saturday or there could be an area of warm
advection and isentropic ascent bringing scattered showers as a sfc
low tracks across southern canada.

Aviation (for the 06z tafs through 06z Monday night)
issued at 115 am edt Mon may 29 2017
vfr expected through the period. Chances for a few showers are not
zero however due to the presence of an upper low spinning over the
great lakes, but are low enough to not include in the tafs.

Marine
Issued at 330 pm edt Sun may 28 2017
still expecting some higher winds and waves into Monday afternoon.

With the cold advection these conditions should linger into Tuesday
afternoon before diminishing.

Hydrology
Issued at 1236 pm edt Sun may 28 2017
not expecting any significant impacts from thunderstorm activity
today or showers on memorial day. While some rivers in the
kalamazoo river basin may be running above normal this week, many
rivers will likely run near normal. Any rises should be well
within banks. No flooding is anticipated.

Grr watches warnings advisories
Mi... None.

Lm... None.

Update... Mjs
synopsis... Jk
short term... Jk
long term... Ostuno
aviation... 04
hydrology... Hoving
marine... Jk


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 11 mi50 min SSE 9.9 G 12 58°F
45029 20 mi30 min W 9.7 G 14 57°F 55°F2 ft1006.3 hPa50°F
SVNM4 - South Haven, MI 20 mi40 min SSW 8 G 11 61°F
45168 22 mi30 min WSW 9.7 G 12 60°F 57°F1 ft1006.9 hPa53°F
45161 39 mi30 min WNW 3.9 G 5.8 55°F 55°F1 ft1006.2 hPa
MKGM4 - Muskegon, MI 42 mi30 min WSW 4.1 G 5.1 55°F 1006 hPa52°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI7 mi57 minW 710.00 miFair60°F54°F80%1006.4 hPa
South Haven, South Haven Area Regional Airport, MI22 mi55 minWSW 610.00 miFair63°F55°F75%1007.1 hPa

Wind History from BIV (wind in knots)
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Last 24hrCalmE3CalmSE3SE6E5SE5SE8S8SW4SW6NW14
G22
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1 day agoN4CalmCalmCalmCalmCalmCalmCalmNE4Calm4SE53W11NW10W10N4W5NW7NW3CalmCalmSW3Calm
2 days agoW6NW3W4CalmW3CalmSW4SW4W3CalmSW5S3W6CalmW6CalmW5NW6NW3NE3CalmCalmCalmCalm

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 (1,6,7,8)
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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.