Monday, April23, 2018 L-36.com


Marine Weather and Tides
Delton, MI

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:46AMSunset 8:34PM Monday April 23, 2018 5:30 AM EDT (09:30 UTC) Moonrise 12:39PMMoonset 2:27AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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- 344 Am Edt Mon Apr 23 2018
Today..Northeast winds 5 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Tonight..Southeast winds 5 to 15 knots backing east toward daybreak. Mostly cloudy. A chance of rain showers overnight. Waves 1 foot or less.
Tuesday..Northeast winds 5 to 10 knots backing north 10 to 15 knots late in the day. Cloudy with a chance of rain showers. Waves 1 foot or less.
Tuesday night..North winds 10 to 20 knots. Mostly cloudy with a chance of rain showers in the evening, then partly cloudy overnight. Waves 1 to 3 feet building to 2 to 4 feet toward daybreak.
LMZ845 Expires:201804231515;;366651 FZUS53 KGRR 230744 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 344 AM EDT Mon Apr 23 2018 For waters within five nautical miles of shore on Lake Michigan LMZ845-231515-

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


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 230730
afdgrr
area forecast discussion
national weather service grand rapids mi
330 am edt Mon apr 23 2018
latest update...

synopsis short term long term marine fireweather

Synopsis
Issued at 330 am edt Mon apr 23 2018
high pressure will provide another mostly sunny and mild day with
high temperatures near 70. A slow moving low pressure system
tracking south of michigan will bring clouds and scattered light
rain showers for Tuesday. After today cooler temperatures,
generally in the 50s, will prevail through the rest of the week.

Short term (today through Wednesday)
issued at 330 am edt Mon apr 23 2018
no significant changes to the fcst. While some high level
cloudiness will move in from the south today, it should be thin
enough to allow for highs close to 70. Thicker clouds arrive
tonight, with chance pops for light rain arriving late mainly
along and south of i-96. Initial band of showers will probably
get mostly chewed up by our dry air mass, with better risk of
showers on Tuesday once better saturation occurs.

The other player on Tuesday Tuesday night in addition to the
upper low over the ohio valley is a NRN stream trough approaching
from the northwest. Models are hinting at better probability of
showers developing later Tuesday across central and northern lower
michigan ahead of this feature. This area should receive more
insolation than SRN lwr mi, so a diurnal component combined with
wk sfc convergence and the apchg wave should result in scattered
afternoon and evening convection. Not forecasting thunder up north
at this time, although models do show a few hundred joules of
mucape developing at pk heating.

Confidence low regarding departure of the rain threat as new
ecmwf wants to hold onto a shower threat into Wednesday -
especially east of hwy 131. For now will keep Wednesday dry with
decreasing clouds, but may need to add pops in ERN sections in
later fcsts.

Long term (Wednesday night through Sunday)
issued at 330 am edt Mon apr 23 2018
a ridge of high pressure will bring fair weather with seasonable
temperatures Wednesday night through Thursday. We did notice that
the 00z ECMWF now suggests that clouds and even some rain snow
showers may develop linger Wednesday night. However this latest
ecmwf run is an outlier among latest medium range guidance
solutions. Therefore we maintained the dry fcst Wednesday night but
will continue to monitor medium range guidance trends.

A low pressure system will move in from the west and bring a chance
of showers late Thursday night and Friday. It is not completely
impossible that some wet snow flakes may mix in with pcpn early
Friday over our northern fcst area.

However this is not the most likely outcome and we continued to
favor the ECMWF solution in which case p-type will be plain rain.

Sfc temps even across our northermost fcst area should stay above
freezing so no winter wx type impacts are expected even if a few wet
snow flakes were to mix in.

A cooler airmass will briefly advect in behind that system Friday
through Saturday when high temperatures will only reach the lower to
perhaps middle 50's. Temperatures will then undergo a slow
moderating trend late in the weekend into early next week as the
colder air retreats back northward.

Aviation (for the 00z tafs through 00z Monday evening)
issued at 1145 pm edt Sun apr 22 2018
vfr conditions will continue at all the terminals through Monday
evening. Winds Monday will become easterly AOB 10 kts with nothing
more than sct-bkn areas of high level cloud cover.

Marine
Issued at 330 am edt Mon apr 23 2018
winds and wave remaining below small craft advisory criteria
through Tuesday, then northerly flow ramping up Tuesday night into
Wednesday could necessitate marine headlines.

Fire weather
Issued at 330 am edt Mon apr 23 2018
will have another day of elevated fire danger today as
temperatures approach 70 with rh values drop into the 20s this
afternoon. Winds may gusts at times to 20 mph during pk heating
when deeper mixing is present.

Hydrology
Issued at 309 pm edt Sun apr 22 2018
lowland nuisance flooding near some riverbanks will be ongoing
over the next few days as water from last weekend's mixed
precipitation event moves through the river basins. Since no heavy
rain events are anticipated in the next week, rivers will
gradually subside.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Meade
short term... Meade
long term... Laurens
aviation... Laurens
fire weather... Meade
hydrology... Cas
marine... Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 46 mi31 min ENE 8 G 11 45°F
HLNM4 - 9087031 - Holland, MI 46 mi43 min ENE 6 G 8 44°F 1023.5 hPa29°F
45168 48 mi31 min NE 7.8 G 9.7 44°F 40°F1 ft1024.4 hPa (-1.0)27°F
SJOM4 - St. Joseph, MI 63 mi31 min NNE 1.9 G 2.9 44°F 1023.4 hPa (-0.6)
MKGM4 - Muskegon, MI 70 mi31 min E 7 G 8 42°F 1026.4 hPa (-0.0)28°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
W K Kellogg Airport, MI16 mi38 minENE 510.00 miFair43°F24°F47%1024 hPa
Kalamazoo/Battle Creek International Airport, MI18 mi38 minN 010.00 miFair42°F23°F47%1024 hPa

Wind History from BTL (wind in knots)
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Last 24hrNE4NE4CalmNE4SE7SE7SE9
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1 day agoCalmS3S4S4S5SW6SW5S7S9SW64S4SW6CalmSE3SE5SE5SE3S3SE4S4CalmCalmCalm
2 days agoCalmCalmCalmN5CalmW3NW8Calm55553NE3CalmN7NW5NW3CalmCalmCalmCalmCalmCalm

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 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 (5,6,7,8)
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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.