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Marine Weather and Tides
Version 3.4 |
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 6:47AM | Sunset 8:39PM | Monday April 23, 2018 5:34 AM EDT (09:34 UTC) | Moonrise 12:39PM | Moonset 2:35AM | Illumination 56% | ![]() |
Marine Forecasts
EDIT (on/off)  HelpLMZ849 Pentwater To Manistee Mi- 344 Am Edt Mon Apr 23 2018 Today..East winds 5 to 10 knots backing north 10 to 20 knots. Sunny. Waves 1 to 3 feet. Tonight..Northeast winds 10 to 20 knots veering east 5 to 10 knots late at night, then veering south toward daybreak. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. Tuesday..Southeast winds around 5 knots backing north 5 to 15 knots. Mostly cloudy with a slight chance of rain showers. Waves around 1 foot. Tuesday night..North winds 15 to 25 knots. Partly cloudy. A slight chance of rain showers in the evening. Waves 3 to 6 feet. | LMZ849 Expires:201804231515;;366647 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 LMZ849-231515- |
7 Day Forecast for Marine Location Near Ludington, MI
Hourly EDIT Helplocation: 43.96, -86.44 debug
Area Discussion for - Grand Rapids, MI
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFxus63 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
EDIT (on/off)  Help NOTE: Click on distance to see the station location on a mapStations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
LDTM4 - 9087023 - Ludington, MI | 1 mi | 47 min | E 5.1 G 7 | 37°F | 26°F | |||
BSBM4 - Big Sable Point, MI | 8 mi | 55 min | ESE 8.9 G 13 | 44°F | 1026.1 hPa |
Wind History for Ludington, MI
(wind in knots) EDIT (on/off)  Help6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | |
Last 24hr | E | E | SE | E | SE | NW | NW | W | NW | NW G9 | NW G10 | N G11 | N G8 | N G9 | N | NW | -- | E | E | E | E | E | E | E |
1 day ago | E | E | E | E | NE | SW | W | W | W | W | W G7 | NW | W | W | W | -- | E | E | E | E | E | E | NE | E |
2 days ago | E | E | E | W | W | W | W | SW | SW | W | W | W | SW | SW | W | -- | E | E | E | E | E | E | E | E |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airportsAirport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Ludington, Mason County Airport, MI | 2 mi | 40 min | ENE 3 | 10.00 mi | Fair | 30°F | 26°F | 87% | 1025.7 hPa |
Manistee County - Blacker Airport, MI | 24 mi | 39 min | E 6 | 10.00 mi | Fair | 28°F | 26°F | 92% | 1028.2 hPa |
Wind History from LDM (wind in knots)
6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | |
Last 24hr | Calm | Calm | Calm | Calm | E | Calm | Calm | W | W | W | W | N G14 | N | N | N | N | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
1 day ago | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SW | SW | SW | W | W | W | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
2 days ago | Calm | Calm | Calm | Calm | Calm | Calm | SW | W | W | W | W | W | SW | W | SW | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
Tide / Current Tables for
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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.
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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. |