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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 6:48AM | Sunset 8:38PM | Sunday April 22, 2018 2:11 PM EDT (18:11 UTC) | Moonrise 11:36AM | Moonset 1:47AM | Illumination 49% |  |
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- 852 Am Cdt Sun Apr 22 2018 Sheboygan Wi To Pentwater Mi South... Rest of today..East winds 5 to 10 kt becoming northeast 10 to 15 kt by early afternoon, then increasing to 10 to 20 kt late in the afternoon. Waves 1 ft or less building to 1 to 3 ft. Tonight..Northeast winds 10 to 20 kt diminishing to 10 to 15 kt after midnight. Waves 1 to 3 ft. Monday..Northeast winds 10 to 15 kt becoming north 10 to 20 kt in the afternoon. Waves 1 to 3 ft. Monday night..Northeast winds 10 to 15 kt becoming east 5 to 10 kt overnight. Chance of rain showers overnight. Waves 1 to 3 ft. Tuesday..Northeast winds 5 to 10 kt becoming north. Chance of rain showers in the morning. Waves 1 to 2 ft. Tuesday night..North winds 15 to 25 kt increasing to 30 kt. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft. Wednesday..North winds to 30 kt diminishing to 15 to 25 kt. Waves 5 to 8 ft occasionally to 10 ft. Thursday..Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Waves 3 to 5 ft. | LMZ872 Expires:201804222130;;331456 FZUS63 KLOT 221352 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 852 AM CDT Sun Apr 22 2018 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...Expansive high pressure of 30.5 inches centered over the eastern Great Lakes will drift to offshore of the Northeast by Monday evening. Meanwhile, low pressure of 29.8 inches across the Lower Mississippi Valley will gradually weaken as it drifts northeast through Monday. Low pressure passing well to the north over Hudson Bay will usher a cold front across the lake Tuesday night. Weakening high pressure of 30.2 inches will then move over the lake on Wednesday night. This will be followed by low pressure moving from the Canadian Prairies to the Great Lakes late in the week. LMZ080-669-671-673-675-777-779-870-872-874-876-878-222130- |
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 221712 afdgrr area forecast discussion national weather service grand rapids mi 112 pm edt Sun apr 22 2018 latest update... aviation Synopsis Issued at 329 am edt Sun apr 22 2018 high pressure will provide mostly sunny and mild weather, with the possibility of our first 70 degree reading of the season on Monday. Low pressure tracking south of michigan on Tuesday will bring clouds and a chance of light rain, followed by slightly cooler weather for midweek. Update Issued at 1103 am edt Sun apr 22 2018 a band of cirrostratus will tend to persist south of holland, grand rapids, and lansing today. Expecting filtered sunshine for most of the day in that area, which should still be enough for highs to reach the lower to mid 60s. Relative humidity is already falling to the 20s and 30s percent, promoting dry ground and moderate fire danger today. Fortunately winds are fairly light, though could gust 15 mph in southern areas. Short term (today through Tuesday) issued at 329 am edt Sun apr 22 2018 less in the way of high clouds expected today and Monday so warmer high temperatures will occur. Combination of near full sun and very dry conditions should lead to superadiabatic lapse rates near the ground and highs exceeding guidance. Will have highs today in the mid to upper 60s and highs Monday around 70. It is possible some thicker cirrus will return to areas south of i-96 Monday afternoon. Last time we had highs at or above 70 was october 22nd. Cooler temps expected at the lakeshore due to afternoon lake breeze. Upper low currently over the SRN plains moves only slowly east the next couple days then heads northeast into the ohio valley on Tuesday. This system brings increasing clouds Monday night followed by a chance of rain showers on Tuesday. Only light amounts under one tenth of an inch are anticipated as the showers pivoting around the north side of the upper low encounter the dry air mass over mi. Long term (Tuesday night through Saturday) issued at 329 am edt Sun apr 22 2018 a few showers will linger into Tuesday night before fair weather returns for midweek as a high pressure ridge builds in from the west for Wednesday through Thursday. Temperatures will continue to average rather close to normal for this time of year midweek. |
A cold front will bring potential for showers late Thursday night and Friday. A cooler airmass will advect in Friday into the weekend when high temperatures will only reach the lower to perhaps middle 50s. Aviation (for the 18z tafs through 18z Monday afternoon) issued at 106 pm edt Sun apr 22 2018 the main issue with the tafs will be the variable wind conditions this afternoon. We have already seen the surface winds... Which have been gusty at times... Varying between northeast and southeast for inland sites. That will likely continue for the afternoon. Then along the lakeshore... A lake breeze was developing near kmkg. This will have to battle the prevailing easterly winds to make it further inland. It appears that the winds around kmkg will remain rather light this afternoon and continue to be variable. Marine Issued at 329 am edt Sun apr 22 2018 tranquil conditions expected on lk mi as sfc ridging provides light wind regime. Offshore winds at night and in the morning should become onshore in the afternoon as lake breeze circulations develop related to differential land lake heating. Fire weather Issued at 329 am edt Sun apr 22 2018 elevated fire danger will exist today and Monday as fuels continue to dry out. Minimum relative humidities in the teens are likely today, and 25-35 pct on Monday. Wind speeds will be relatively light, but east winds may reach 10-15 mph in the afternoon. Some gusts to 20 mph will be possible at pk heating when deeper mixing heights around 6000 ft are present, especially southern sections. Hydrology Issued at 314 pm edt Sat apr 21 2018 lowland flooding near riverbanks will be ongoing over the next several 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 crest then subside with only nuisance level impacts. Grr watches warnings advisories Mi... None. Lm... None. Update... Cas synopsis... Meade short term... Meade long term... Laurens aviation... Mjs 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 map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| 45161 | 36 mi | 32 min | WNW 5.8 G 5.8 | |||||
| MKGM4 - Muskegon, MI | 37 mi | 22 min | NNW 11 G 11 | 48°F | 1029.3 hPa | 32°F | ||
| 45029 | 43 mi | 22 min | NNW 3.9 G 5.8 | 42°F | 38°F | 1029.3 hPa | 31°F | |
| MLWW3 - Milwaukee, WI | 46 mi | 22 min | NNE 7 G 7 | 40°F | ||||
| PWAW3 - Port Washington, WI | 48 mi | 32 min | NE 7 G 8 | 45°F | 1029.8 hPa |
Wind History for Holland, MI
(wind in knots) EDIT (on/off) Help| 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 | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | |
| Last 24hr | SW | W | NW | W | NW | NW | NW | N | N | NE | E | E | E | E | E | E | E | E | E | SE G10 | E G10 | E G13 | E G18 | NE G14 |
| 1 day ago | W | W | NW | NW | N | N | N | N | NE | E | E | E | N | E | E | E | E | E | NW | W | N | NW | W | SW |
| 2 days ago | NW | NW G27 | NW | NW G26 | NW | NW G19 | NW | N | NW | NW | NW | NE | NE | NE | SE | E | S | SE | SW | SW | W | W | NW | NW |
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 | 17 min | ESE 8 | 10.00 mi | Partly Cloudy | 64°F | 25°F | 23% | 1028.6 hPa |
Wind History from MKG (wind in knots)
| 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 | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | |
| Last 24hr | W | NW | W | NW | NW | NW | SW | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | E | E | SE | E | SE | E | |
| 1 day ago | W | W | W | NW | W | NW | NW | Calm | Calm | Calm | E | Calm | Calm | Calm | Calm | Calm | N | Calm | Calm | Calm | Calm | N | W | |
| 2 days ago | NW | NW | N | NW G23 | NW | NW | NW | NW | Calm | NW | NW | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | W | W | W |
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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Wind Forecast for Grand Rapids, MI (14,3,4,5)
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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. |