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Marine Weather and Tides
Version 3.4 |
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 7:29AM | Sunset 7:46PM | Wednesday September 20, 2017 3:38 AM EDT (07:38 UTC) | Moonrise 6:50AM | Moonset 7:23PM | Illumination 0% |  |
Marine Forecasts
EDIT (on/off) Help| LMZ872 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 821 Pm Cdt Tue Sep 19 2017 Sheboygan Wi To Pentwater Mi South... Rest of tonight..Northeast winds 10 to 15 kt becoming southeast after midnight. Waves 1 to 3 ft. Wednesday..Southeast winds 10 to 20 kt increasing to 15 to 25 kt in the early afternoon. Waves building to 3 to 5 ft. Wednesday night..South winds 10 to 20 kt becoming southwest 10 to 15 kt overnight. Chance of showers and Thunderstorms. Waves subsiding to 1 to 3 ft. Thursday..South winds 5 to 10 kt becoming southeast. Waves 1 to 3 ft. Thursday night..Southeast winds 10 to 15 kt becoming south. Waves 1 to 2 ft. Friday..South winds 10 to 15 kt. Waves 1 to 3 ft. Friday night..South winds 10 to 20 kt. Waves 2 to 4 ft. Saturday..South winds 10 to 15 kt increasing to 10 to 20 kt. Waves 2 to 4 ft. Sunday..South winds 10 to 15 kt. Waves 1 to 3 ft. | LMZ872 Expires:201709200915;;641199 FZUS63 KLOT 200121 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 821 PM CDT Tue Sep 19 2017 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS...Weak high pressure of 30.0 inches across Lake Michigan will drift east tonight. Low pressure of 29.3 inches across the Canadian prairie provinces will gradually weaken through midweek with an associated trough of low pressure around 29.8 inches weakening as it approaches the lake late Wednesday night. High pressure around 30.1 inches will prevail across the central and eastern Great Lakes during the latter part of the week and into the weekend. LMZ080-669-671-673-675-777-779-870-872-874-876-878-200915- |
7 Day Forecast for Marine Location Near Montague, MI
Hourly EDIT Helplocation: 43.14, -87.03 debug
Area Discussion for - Grand Rapids, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kgrr 200704 afdgrr area forecast discussion national weather service grand rapids mi 304 am edt Wed sep 20 2017 latest update... synopsis short term long term marine Synopsis Issued at 244 am edt Wed sep 20 2017 a weak area of high pressure will track through the region today providing the area with mainly dry conditions after a foggy start. Tonight a cold front will be weakening as it tracks in from the northwest. This feature will dissipate over the area on Thursday. It will become increasingly moist so a few showers or thunderstorms may occur. Summerlike conditions are expected for the end of the week. Short term (today through Friday) issued at 244 am edt Wed sep 20 2017 fog status will prevail around the region to start the day. The fog should thicken up somewhat as we go toward daybreak. At this time the cloud cover that is in place appears to the limiting the coverage of dense fog. So will not go with a headline at this time. There were a few light rain showers in the eastern zones around mount pleasant. Will hold onto a low risk for showers to start the morning there. Tonight the cold front that featured an active line of storms yesterday in the upper plains... Will be moving into michigan from the northwest. This feature will be weakening with time and is expected to dissipate over the area on Thursday. What it does do is draw in increasing amounts of moisture with pwat values close to 1.75 inches. So it may very well feel muggy. The low level thermal ridge folds in as well. High temperatures will be topping out in the mid to upper 80s Thursday and Friday. The atmosphere each day will become quite unstable as well. Deep layer shear will be weak so any storms should be pulse in nature. With the boundary of the dissipating front still around on Thursday will go with a risk for thunderstorms. Will keep it dry for Friday with no real focusing mechanism around along with the main axis of moisture shifting north of the CWA resulting in falling pwat values. Long term (Friday night through Tuesday) issued at 244 am edt Wed sep 20 2017 a dome of high pressure will create mid summer-like conditions this weekend across lower michigan. Highs in the mid to upper 80s coupled with dewpoints in the mid 60s will feel hot and humid. We're running with a dry forecast through the period too. The |
exception to that is next Tuesday afternoon. Both the ECMWF and gfs show a strong short wave ejecting out of the western us trough and pushing the northern portion of the great lakes ridge eastward. This allows a cold front to move close to lake michigan Tuesday. We'll continue with a slight chance of showers storms Tuesday afternoon across the northwest cwa. The higher chance of pcpn will come Tuesday night if current model trends hold. Aviation (for the 06z tafs through 06z Wednesday night) issued at 105 am edt Wed sep 20 2017 latest IR loop shows stratus rapidly overspreading the cwa. We expect the TAF sites to fall below 1k ft overnight and vsbys to be in the ifr lifr range. CIGS vsbys will mix out later this morning and becomeVFR by afternoon. Marine Issued at 244 am edt Wed sep 20 2017 the easterly surface winds will veer today and tonight as a weakening cold front nears. This system will dissipate over the area on Thursday. The combination of offshore flow and a relatively weak pressure gradient will act to keep the wave heights low today. Tonight and Thursday the pressure gradient will be weakening. So despite an increasing fetch... The warm air advection and weakening front will support only low wave heights. Hydrology Issued at 330 pm edt Tue sep 19 2017 rainfall this morning was fairly light and occurred south of a line from holland to lansing. Most rainfall totals were under 0.10 inches, but a few locations did pick up more than 0.25 inches. Weakening low pressure tracking south of the area will continue to provide a chance for showers south of i-96 today. Rainfall this afternoon and evening will be even more hit and miss than this morning. A few locations in ingham, jackson, and calhoun counties could pick up more than a tenth of an inch of new rainfall, however. A weak frontal boundary will provide the next chance for showers or a thunderstorm Wednesday night into Thursday. High confidence then exists with very warm and dry conditions late Friday through the weekend. Grr watches warnings advisories Mi... None. Lm... None. Synopsis... Mjs short term... Mjs long term... 04 aviation... 04 hydrology... Hlo marine... Mjs |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| 45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI | 32 mi | 48 min | E 7.8 G 9.7 | 68°F | 69°F | 1 ft | 1012.9 hPa (-0.8) | |
| 45161 | 36 mi | 38 min | E 9.7 G 12 | 65°F | 67°F | 1 ft | 1013.1 hPa (-1.0) | |
| MKGM4 - Muskegon, MI | 37 mi | 38 min | ESE 9.9 G 12 | 64°F | 1013 hPa (-1.2) | 64°F | ||
| 45029 | 43 mi | 28 min | ESE 7.8 G 9.7 | 66°F | 67°F | 1 ft | 1012.9 hPa | 62°F |
| 45013 | 44 mi | 59 min | S 7.8 G 9.7 | 68°F | 68°F | 1013.1 hPa | ||
| MLWW3 - Milwaukee, WI | 46 mi | 48 min | SSW 5.1 G 5.1 | 67°F | ||||
| PWAW3 - Port Washington, WI | 48 mi | 58 min | S 4.1 G 6 | 67°F | 1013.9 hPa |
Wind History for Holland, MI
(wind in knots) EDIT (on/off) Help| 4 AM | 5 AM | 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 | |
| Last 24hr | E G13 | E G15 | E G16 | E G13 | E G14 | E G15 | NE G15 | E G16 | E G13 | E G14 | E G11 | NE G13 | NE G10 | E G7 | NE | NE G8 | NE | E G5 | NE | E | E | E | E | E |
| 1 day ago | N | N | N | N | NE | NE | NE | NE G11 | NE G7 | E | E | NW | W | NW | NW | NW | N | NE | E | E | E | E | E G12 | E G14 |
| 2 days ago | SE G14 | SE G16 | S G15 | S | S | S | S | S | S | S | W | SW | W | NW | NW | N | NW | NW | NW | NW | NW | NW | N |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Muskegon, Muskegon County Airport, MI | 40 mi | 43 min | ESE 4 | 5.00 mi | Fog/Mist | 63°F | 61°F | 93% | 1013.2 hPa |
Wind History from MKG (wind in knots)
| 4 AM | 5 AM | 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 | |
| Last 24hr | E | E | E | E | E | E | E | E | NE | E | E | E | SE | E | E | NE | E | E | E | E | E | E | E | SE |
| 1 day ago | Calm | Calm | Calm | N | N | NE | NE | E | NE | E | W | W | NW | NW | NW | NW | Calm | E | E | E | Calm | E | E | |
| 2 days ago | SE | SE | SE | S | S | S | S | S G18 | SW G20 | SW | SW | SW | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | N |
Tide / Current Tables for
EDIT RT Ports Option Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of GreatLakes EDIT  |
Wind Forecast for Grand Rapids, MI (3,6,7,8)
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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. |