Saturday, July22, 2017 L-36.com


Marine Weather and Tides
Delton, 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 6:24AMSunset 9:12PM Saturday July 22, 2017 6:54 AM EDT (10:54 UTC) Moonrise 4:33AMMoonset 7:35PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 342 Am Edt Sat Jul 22 2017
Today..Southwest winds 10 to 20 knots veering northwest around 10 knots. Mostly cloudy with a slight chance of showers and Thunderstorms. Waves 1 to 2 feet.
Tonight..North winds 5 to 10 knots backing northwest toward daybreak. Partly cloudy. Areas of fog overnight. Waves 1 foot or less.
Sunday..West winds around 10 knots. Partly Sunny. Areas of fog until midday. A slight chance of showers and Thunderstorms in the afternoon. Waves 1 foot or less.
Sunday night..North winds 10 to 15 knots. Partly cloudy. A slight chance of showers and Thunderstorms in the evening. Waves 1 to 2 feet.
LMZ845 Expires:201707221515;;635116 FZUS53 KGRR 220742 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 342 AM EDT Sat Jul 22 2017 For waters within five nautical miles of shore on Lake Michigan LMZ845-221515-

7 Day Forecast for Marine Location Near Delton, MI
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location: 42.49, -85.43     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 220729
afdgrr
area forecast discussion
national weather service grand rapids mi
329 am edt Sat jul 22 2017
latest update...

synopsis short term long term marine

Synopsis
Issued at 330 am edt Sat jul 22 2017
low pressure and a humid air mass will bring considerable
cloudiness and scattered showers and thunderstorms through the
weekend. Less humid weather and mainly clear conditions are
expected for early next week as high pressure builds in.

Short term (today through Monday)
issued at 330 am edt Sat jul 22 2017
warm front instability has struggled to advance north due to
widespread convection persisting from NE ia to NRN il in. Have
therefore continued theme of lowering pops qpf, although recently
identified MCV near beh will bring showers and a few tstms to at
least the i-94 corridor over the next few hours.

After passage of the showers this morning on NRN fringes of the
stronger convection south of michigan, prospects for new
convection look slim this afternoon and evening due to extensive
cloudiness persisting and a capping inversion noted in the fcst
soundings.

For tonight, a few showers and tstms associated with approaching
upper low shortwave trough may impact areas north of i-96 after
06z. With high dew points around 70 lingering, areas of fog are
possible tonight into Sunday morning if where pockets of clearing
develop.

Upper trough will will be over the region on Sunday and associated
lift colder air aloft will contribute to destabilization for the
afternoon evening hours. However as low level wly nwly flow
develops strengthens over WRN lwr mi, better afternoon instability
and sfc convergence should be mainly east of our area. Risk of
stronger storms should therefore favor eastern lwr mi, mainly
east of u.S. 127.

Drier air ridging moves in Sunday night and Monday, leading to
more comfortable conditions.

Long term (Monday night through Friday)
issued at 330 am edt Sat jul 22 2017
we are looking at a fairly quiet and tranquil long term period this
coming week, along with seasonable temperatures. There looks to be
only one period where there are legitimate rain chances.

We will start out with dry conditions at the beginning of the long
term Mon night. This dry period will last at least through tue.

Upper ridge axis situated to our west on Monday will slip east of
the area by Tue evening. Sfc ridging with a canadian origin will
bring a comfortable air mass to the area through Tuesday.

Rain chances will gradually increase as early as Tue night, likely
peaking on wed. We still expect an upper low to traverse SRN canada
through mid-week that will eventually push a sfc front down into the
area. This front coming from canada will not have significant
moisture with it. Also there is not a strong direct gulf flow ahead
of it. It could come through at peak heating, which is probably the
best thing going for it.

There is some disagreement with how quick the front sinks south of
the area. Solutions range from Wed evening through Thu afternoon.

The thought is that a little quicker solution is preferred with a
nice canadian ridge pushing it through. We will keep a chc of rain in
through Wed night, then dry out the forecast. Comfortable temps will
be reinforced behind the front for the end of the week.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 138 am edt Sat jul 22 2017
our first order of business is dealing with the rain trends and
thunder chances. Some lighter rain showers have been occasionally
affecting the terminals. A lack of low level moisture has limited
the amount of rainfall, along with the stronger storms staying
south of the state. The rain will remain possible for the next few
hours before it moves out with the wave. We have left thunder
mention out as all of the thunder has remained south of the state
also.

We do expect to see some MVFR CIGS move in with better low level
moisture moving in behind the wave. This will slowly lift toVFR
this afternoon, before clearing up some this evening.

Marine
Issued at 330 am edt Sat jul 22 2017
winds waves remaining below advisory criteria this weekend
although a fog risk will exist due to high dew points over the
cooler waters, particularly tonight and Sunday morning. Period of
stronger northerly flow cold advection could send waves to
heights close to advisory criteria Sunday night into early Monday.

Hydrology
Issued at 330 pm edt Fri jul 21 2017
the favored region for locally heavy rainfall through early Saturday
will be south of i-96 and particularly near the mi in border. Hi res
models have trended further south with thunderstorm activity
overnight into Saturday morning due to poor handling of earlier
convection. Therefore, the risk for heavy rainfall has shifted
accordingly. Localized flooding will still be possible where any
storms persist. This may be more of a concern near i-94 and toward
the mi in border. Rises of small rivers and streams will be possible
but it is not looking like the main stem rivers will have any big
issues unless convective trends change significantly.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Meade
short term... Meade
long term... Njj
aviation... Njj
hydrology... Hoving
marine... Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 46 mi55 min NNE 1 G 2.9 71°F
HLNM4 - 9087031 - Holland, MI 46 mi55 min E 7 G 9.9 71°F 1008.6 hPa (-2.4)
45168 48 mi35 min S 5.8 G 7.8 72°F 72°F1 ft1008.4 hPa67°F
SJOM4 - St. Joseph, MI 63 mi55 min S 4.1 G 8.9 72°F 1007.5 hPa (-4.4)
MKGM4 - Muskegon, MI 70 mi45 min SE 6 G 8 70°F 1008.1 hPa67°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
W K Kellogg Airport, MI16 mi62 minSSE 1210.00 miA Few Clouds70°F68°F93%1009.1 hPa
Kalamazoo/Battle Creek International Airport, MI18 mi62 minS 86.00 miFog/Mist72°F69°F91%1009 hPa

Wind History from BTL (wind in knots)
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Last 24hrCalmN3CalmNE5E64E5S45W6S6SW4W6W5N4E5NW3W3S8S6S4S9S12S12
1 day agoW8SW10SW9W9S3W6W6W12W8W9W7W7NW7W5NW5W4W6NW3CalmCalmCalmCalmCalmCalm
2 days agoS4S3SW5W4W3NW4NW4SW5W5W6E6W9CalmW4W5CalmCalmSW5W5S10S7S4SW5W8

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 (6,6,7,8)
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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.