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Marine Weather and Tides
Version 3.4 |
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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. |
| Sunrise 6:03AM | Sunset 9:30PM | Thursday June 21, 2018 4:15 AM EDT (08:15 UTC) | Moonrise 2:07PM | Moonset 1:36AM | Illumination 55% |  |
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- 245 Am Cdt Thu Jun 21 2018 Sheboygan Wi To Pentwater Mi South... Today..East winds 10 to 20 kt becoming northeast 15 to 25 kt. Chance of showers and slight chance of Thunderstorms this morning, then showers and slight chance of Thunderstorms this afternoon. Waves 2 to 4 ft. Tonight..Northeast winds 15 to 25 kt increasing to 30 kt. Showers. Slight chance of Thunderstorms overnight. Waves building to 4 to 7 ft occasionally to 9 ft. Friday..Northeast winds 15 to 25 kt. Showers likely in the morning, then chance of showers in the afternoon. Waves 4 to 7 ft occasionally to 9 ft. Friday night..Northeast winds 15 to 25 kt diminishing to 10 to 15 kt overnight. Chance of showers in the evening. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. Saturday..North winds 10 to 15 kt. Waves 2 to 4 ft. Saturday night..Northwest winds 10 to 15 kt. Waves 1 to 3 ft. Sunday..North winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 3 ft building to 2 to 4 ft. Monday..Northeast winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 3 ft. | LMZ872 Expires:201806211400;;868691 FZUS63 KLOT 210745 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 245 AM CDT Thu Jun 21 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...Low pressure of 29.7 inches over Iowa this morning will slowly move to central Illinois Friday morning and then to near Lake Erie on Saturday...as a weak ridge of high pressure remains stretched from the northern lakes region to New England. Weak low pressure will move across Ontario Saturday and into Quebec Saturday night. A trailing cold front will move south across the region Sunday night with high pressure of 30.2 inches moving across the Great Lakes on Monday. LMZ080-669-671-673-675-777-779-870-872-874-876-878-211400- |
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 210728 afdgrr area forecast discussion national weather service grand rapids mi 328 am edt Thu jun 21 2018 latest update... synopsis short term long term marine Synopsis Issued at 316 am edt Thu jun 21 2018 a slow moving low pressure system centered over iowa will lift into the southern great lakes region over the next few days. This will result in an unsettled weather pattern developing. Temperatures will likely end up below normal over the next couple of days as well. Short term (today through Saturday) issued at 316 am edt Thu jun 21 2018 a couple of concerns with the forecast exist in the short term. Fog this morning... Followed by showers timing and temperatures. To start... There was some patchy dense fog around the region... Mostly from kalamazoo to jackson region. Overall with the mid and upper level clouds thickening up... It appears this fog will not become widespread. Will therefore feature patchy fog to start the morning. Showers have been moving northeastward through northern indiana. They have been weakening with time as they move away from the better moisture. As the day progresses... This moisture axis shifts steadily toward southwest parts of my cwa. Some high res models are suggesting the showers could become numerous towards kalamazoo. Will increase pops for southern parts of the cwa... Mainly for this afternoon. The thunder risk looks low through this evening... But some elevated instability is shown to move in later tonight. Will therefore start to mention a risk for a few storms then... And keep that risk into Saturday with a pesky low around. Temperatures should end up below normal into Saturday. Today with some Sun will likely be the warmest day... But with the low moving in Friday into Saturday... Temperatures should end up a couple of degrees below normal. Long term (Saturday night through Wednesday) issued at 316 am edt Thu jun 21 2018 by late Saturday night, the weakening cut-off low with which we have become so familiar will be over lower michigan on its trek northeast into southern ontario. Light showers will be possible so long as the low is anywhere close, so have maintained low pops through the end of the day on Sunday. I still think we may get a sneaky thunderstorm or two Sunday afternoon as a weak upper-level impulse surges south over the great lakes. Such a scenario is dependent on any breaks in cloud cover and associated pockets of modest instability which is, at this stage in the forecast, hard to discern. However, shear will be quite weak so i'm not concerned about anything organized. A high pressure system will settle over the region early next week leading to seasonable temperatures and dry conditions. Relative humidity percentages on Monday and Tuesday may dip to the upper 30s across lake, osceola, and clare counties though weak winds in association with the passing high pressure system overhead will temper any fire concerns. The pattern will remain progressive with a shortwave trough expected to swing through by the mid to end of next week. Increasing warm air advection ahead of the feature will help increase temperatures and |
moisture with highs climbing back into the mid 80s and dew points toward the 70 degree mark, respectively, Wednesday and Thursday. There also looks to be a fairly good chance of showers and thunderstorms by the end of the week, though there is quite a bit of time for things to shake out between now and then. As such, i capped pops at chance (e.G. 50% or so) areawide for this forecast package. Aviation (for the 06z tafs through 06z Thursday night) issued at 1246 am edt Thu jun 21 2018 with calm winds and low-level moisture augmented from heavy rainfall that fell last night, conditions have become favorable for pockets of fog through the early morning hours at azo btl jxn. Rather than playing the "catch up" game with amendments tonight (e.G. I expect visibility to go back and forth between MVFR ifr through the overnight period), I elected to have prevailing MVFR visibilities at the southern TAF sites with 4-hour tempo groups for ifr visibilities of 2sm at azo btl. At jxn, there seems to be a better signal for denser fog so I have 1 2 visibility in that tempo group. The fog is expected to abate fairly quickly after sunrise as increasing winds aid in mixing in dry air into the low-level stable layer. The other concern for our southern TAF sites is the potential for light showers starting toward daybreak in an elongated zone of precipitation from the ohio river valley toward southern minnesota. Numerical model guidance seems a bit too dry for my liking (e.G. Again there is quite a bit of low-level moisture from the heavy rain last night) so I added vcsh for now with the expectation that later forecast packages will refine my forecast based on observations. It is quite possible that -ra is added to azo btl for Thursday afternoon by the 12z forecast package. At mkg lan grr,VFR conditions are expected to prevail through the entire TAF period. Precipitation may near grr and lan toward the end of the forecast period. Finally, winds will pick up during the afternoon on Thursday and gust to 15-20 kts at all TAF sites before quickly abating toward sunset. Marine Issued at 316 am edt Thu jun 21 2018 easterly winds will increase somewhat over the next few days as the low pressure system tracks eastward through the far southern great lakes region. Currently it appears the values will remain below headline criteria... But some values up around 20 knots are possible today for a few hours. Hydrology Issued at 1234 pm edt Tue jun 19 2018 look for minor rises on rivers streams along and south of i-94 over the next couple of days. Around an inch of rain has fallen in that region recently and the runoff continues. Grr watches warnings advisories Mi... None. Lm... None. Synopsis... Mjs short term... Mjs long term... Borchardt aviation... Borchardt hydrology... 04 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 | 86 min | NE 9.7 G 9.7 | 63°F | 63°F | 1 ft | 1010.2 hPa (-1.2) | 61°F |
| MKGM4 - Muskegon, MI | 37 mi | 26 min | ESE 7 G 7 | 64°F | 1010.5 hPa | 62°F | ||
| 45029 | 43 mi | 26 min | E 7.8 G 9.7 | 66°F | 69°F | 1 ft | 1010.3 hPa | 60°F |
| 45013 | 44 mi | 69 min | NNW 3.9 G 3.9 | 57°F | 56°F | 1 ft | 1011 hPa | |
| MLWW3 - Milwaukee, WI | 46 mi | 26 min | NE 4.1 G 4.1 | 59°F | ||||
| PWAW3 - Port Washington, WI | 48 mi | 36 min | NNE 5.1 G 8.9 | 61°F | 1011.9 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 | NE G11 | NE | NE G13 | E G14 | NE G15 | E G18 | E | E G15 | E | E G15 | NE G9 | NE | E G9 | NE G11 | E G8 | NW | NW | N | -- | N | N | E | NE | E |
| 1 day ago | NE G10 | NE G14 | E G10 | E G13 | E | E G16 | E G14 | E G16 | E G13 | E G14 | NE G14 | E G17 | E G16 | E G15 | E G18 | E G15 | E G12 | E G10 | NE | E G12 | NE G14 | E G12 | E G12 | NE G12 |
| 2 days ago | S G17 | S | W G14 | S | S | S | S | S | S G20 | SW G10 | SW | SW | NW | NW | NW | W | N G11 | NW | NW | N | N G12 | NE | NE G9 |
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 | 21 min | SE 4 | 10.00 mi | Fair | 60°F | 57°F | 90% | 1010.5 hPa |
Wind History from MKG (wind in knots)
| 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 | 4 AM | |
| Last 24hr | E | E | NE | E | E | E | E | NE | E | E | NE | W | E | W | NW | W | W | N | Calm | NE | E | Calm | SE | |
| 1 day ago | NE | NE | E | NE | NE | E | E | E | NE | E | E | E | E | NE | E | E | NE | NE | NE | NE | NE | E | E | E |
| 2 days ago | SW | W | S | S | S | SW | W | SW | SW | W | W | W | NW | NW | NW | NW | NW | N | N | N | N | N | NE | NE |
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 (4,6,7,8)
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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. |