Friday, March22, 2019 L-36.com


Marine Weather and Tides
Grand Haven, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:43AMSunset 8:00PM Friday March 22, 2019 8:19 AM EDT (12:19 UTC) Moonrise 9:09PMMoonset 8:00AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 412 Pm Est Fri Jan 25 2019
.heavy freezing spray warning in effect through Saturday morning...
.small craft advisory in effect through Saturday afternoon...
Tonight..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet.
Saturday..Southwest winds 10 to 20 knots. Mostly cloudy with a slight chance of snow showers. Freezing spray. Waves 2 to 3 feet.
Saturday night..West winds 20 to 25 knots. Snow showers likely in the evening, then a chance of snow showers overnight. Heavy freezing spray through the night. Waves 3 to 5 feet.
Sunday..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet. This is the last nearshore marine forecast (nshgrr) issuance for the season. The nshgrr will again be issued around april 1st 2019, or as conditions warrant.
LMZ846 Expires:201901260415;;919602 FZUS53 KGRR 252113 CCA NSHGRR Nearshore Marine Forecast...corrected National Weather Service Grand Rapids MI 412 PM EST Fri Jan 25 2019 For waters within five nautical miles of shore on Lake Michigan LMZ846-260415-


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 221123
afdgrr
area forecast discussion
national weather service grand rapids mi
723 am edt Fri mar 22 2019
latest update...

aviation

Synopsis
Issued at 252 am edt Fri mar 22 2019
- scattered snow showers today
- mixed precip Sunday night

Discussion (today through next Thursday)
issued at 252 am edt Fri mar 22 2019
cold front pushing through this morning will bring scattered snow
showers but little or no impact to travel expected. A stronger
front will arrive Sunday night and interact with surface low
tracking through the ohio valley. Deeper moisture will remain
across far southern lower michigan but area of f-gen should extend
far enough north to give about the southern half of the forecast
area measurable precip.

There could be some impacts to travel Monday morning as
temperatures fall below freezing and rain changes to snow but
these should be minor as temperatures are marginal and
precipitation is not expected to be heavy. We will have to watch
this since ensemble spread remains and it is possible heavier
precip could occur further north than currently forecast.

Sfc high builds in for the middle of the week before it moves east
and return flow moisture arrives late Thursday ahead of another
cold front.

Aviation (for the 12z tafs through 12z Saturday morning)
issued at 723 am edt Fri mar 22 2019
vfr conditions expected to prevail through tonight. There could be
brief MVFR today in passing snow showers but this should not be
widespread. Northwest winds will gust over 20 knots at times
today.

Hydrology
Issued at 315 pm edt Thu mar 21 2019
no more flood products are in effect as river levels have fallen
below flood stage and runoff water levels have subsided across
newaygo county. However, numerous roadways remain closed
particularly across newaygo and northern kent counties due to
flood water damage. No significant precipitation is expected over
the next four to seven days.

Grr watches warnings advisories
None.

Synopsis... Ostuno
discussion... Ostuno
aviation... Ostuno
hydrology... Borchardt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 12 mi20 min N 11 G 14 35°F 1015.4 hPa (+2.2)26°F
HLNM4 - 9087031 - Holland, MI 21 mi38 min 33°F 37°F1013 hPa29°F
SVNM4 - South Haven, MI 45 mi20 min NNW 20 G 24 36°F
LDTM4 - 9087023 - Ludington, MI 62 mi38 min 36°F 25°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI10 mi25 minNNW 1010.00 miPartly Cloudy34°F25°F70%1014.6 hPa

Wind History from MKG (wind in knots)
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Last 24hrN5N6N5N7N7W7NW10NW8W12W6SW9SW6--SW11SW11SW12SW8W6NW7N7N8N10N14NW10
1 day agoS13S14
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S9SE7SE6SE6SE8E6E4SE5E3E3CalmN4NE3N4N4NE3N5N9
2 days agoSE4S6SW9W9SW8SW9W7SW8SW11SW10S7S7S6S6S3S5S9S9S10S13S10S17
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (8,2,3,4)
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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.