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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 7:00AM | Sunset 8:34PM | Sunday August 25, 2019 7:05 PM EDT (23:05 UTC) | Moonrise 12:31AM | Moonset 3:57PM | Illumination 21% |  |
LMZ846 Holland To Grand Haven Mi- 405 Pm Edt Sun Aug 25 2019
Through early evening..Southeast winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less.
Tonight..Southeast winds 10 to 20 knots. Mostly cloudy. Waves around 1 foot.
Monday..Southeast winds 15 to 20 knots. Rain showers likely and a slight chance of Thunderstorms. Waves 1 to 3 feet.
Monday night..South winds 15 to 20 knots. Rain showers and a slight chance of Thunderstorms. Waves 2 to 3 feet building to 3 to 5 feet after midnight.
Tuesday..West winds 15 to 20 knots. Mostly Sunny with a chance of showers and Thunderstorms. Waves 3 to 5 feet.
Tuesday night..West winds 15 to 20 knots. Mostly clear. Waves 3 to 5 feet.
Wednesday..West winds 20 to 25 knots. Mostly Sunny. Waves 5 to 7 feet.
Thursday..West winds 15 to 20 knots backing southwest late in the day. Sunny. Waves 2 to 4 feet.
Friday..West winds 10 to 20 knots. Mostly Sunny. Waves 3 to 5 feet.
Through early evening..Southeast winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less.
Tonight..Southeast winds 10 to 20 knots. Mostly cloudy. Waves around 1 foot.
Monday..Southeast winds 15 to 20 knots. Rain showers likely and a slight chance of Thunderstorms. Waves 1 to 3 feet.
Monday night..South winds 15 to 20 knots. Rain showers and a slight chance of Thunderstorms. Waves 2 to 3 feet building to 3 to 5 feet after midnight.
Tuesday..West winds 15 to 20 knots. Mostly Sunny with a chance of showers and Thunderstorms. Waves 3 to 5 feet.
Tuesday night..West winds 15 to 20 knots. Mostly clear. Waves 3 to 5 feet.
Wednesday..West winds 20 to 25 knots. Mostly Sunny. Waves 5 to 7 feet.
Thursday..West winds 15 to 20 knots backing southwest late in the day. Sunny. Waves 2 to 4 feet.
Friday..West winds 10 to 20 knots. Mostly Sunny. Waves 3 to 5 feet.
LMZ846 Expires:201908260800;;199698
FZUS53 KGRR 252005
NSHGRR
Nearshore Marine Forecast
National Weather Service Grand Rapids MI
405 PM EDT Sun Aug 25 2019
For waters within five nautical miles of shore on Lake Michigan
LMZ846-260800-
7 Day Forecast for Marine Location Near Spring Lake, MI
Hourly EDIT Helplocation: 43.07, -86.19 debug
Area Discussion for - Grand Rapids, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kgrr 251923 afdgrr area forecast discussion national weather service grand rapids mi 323 pm edt Sun aug 25 2019 latest update... synopsis discussion marine Synopsis Issued at 323 pm edt Sun aug 25 2019 - showers and a few thunderstorms Monday - 2 inches of rain possible in spots Tuesday morning - a final shot of precipitation possible Wednesday and breezy Discussion (this evening through next Sunday) issued at 323 pm edt Sun aug 25 2019 -- showers and a few thunderstorms Monday -- models remain consistent with timing showers and thunderstorms into the area after sunrise Monday and spreading northeast during the day. Thunderstorms shouldn't be widespread but they are a concern. Forecast reasoning: instability doesn't look overly impressive and there is much dry air to overcome. Still, there is a potent upper low over the southern plains that will lift north and a strong upper pv anomaly crossing montana that will provide plenty of dynamic lift and should induce a moisture laden southeasterly low level jet during the day Monday. The low-level shear is a little troubling in terms of quick spinups that have a non-zero chance of occurring with the right type of outflow boundary interaction. -- 2 inches of rain possible in spots Tuesday morning -- chances are increasing for brief but intense rainfall Tuesday morning with local amounts exceeding 2 inches in spots. This could impact the morning commute and nuisance flooding will also be possible. The best guess for location is currently from the muskegon area northeastward. However, given the localized nature of the precipitation, we are far from certain exactly where this would occur. Forecast reasoning: focus for rain will be associated with a cold front and a narrow unseasonably moist plume of moisture ahead of the front. Deterministic models show a sharp digging upper trough with attendant strong mid-level frontogenesis resulting from compression and rotation of the thermal gradient. Precipitation efficiency will be boosted by high precipitable water values. Rain rates could be impressive in spots, with 2 inches an hour or more not out of the question. Fortunately durations at any given location should be curtailed by the expected steady progression of the front. |
-- a final shot of precipitation possible Wednesday and breezy -- we included a slight chance of rain showers mainly north of muskegon and near the lakeshore. Timing could be in the morning or in the afternoon. Rainfall amounts should be light and wind should be quick to diminish later in the day. Forecast reasoning: a distinct upper potential vorticity lobe will sweep east across lower michigan at the base of a sharp upper low. Given the stacked nature of this system, 850 mb temperatures will be cool, especially farther north, and marginally favorable for lake enhanced rain. There is some minor disagreement among models regarding timing of the lobe. What's more certain is the upper low exiting the area later in the day to be replaced by dry northwest flow aloft and a loosening surface pressure gradient. Aviation (for the 18z tafs through 18z Monday afternoon) issued at 146 pm edt Sun aug 25 2019 no changes to previous forecast, high certainty forVFR at all terminals through 06z, although may see occasional ceilings around 4000 ft agl this afternoon at jxn and lan where we see a greater concentration of daytime cumulus clouds. Precipitation is expected to impact most terminals after 12z Monday when ceilings at or below 3000 ft agl will become more prevalent. Marine Issued at 323 pm edt Sun aug 25 2019 we are increasingly concerned about wind and waves on Wednesday, which will mark a full day of elevated wind and waves beginning Tuesday. Showers and thunderstorms combined with cool waters may limit beach activity Tuesday, but drier conditions and recovering water temperatures with strong onshore winds Wednesday may be a different story. As noted before, a small craft advisory will likely beginning early Tuesday, but will let subsequent shifts hammer out the details. Grr watches warnings advisories Mi... None. Lm... None. Synopsis... Tjt discussion... Tjt aviation... Tjt marine... Tjt |
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 | 12 mi | 66 min | 69°F | 1 ft | 1017.9 hPa (-2.2) | |||
| 45029 | 13 mi | 26 min | NE 9.7 G 16 | 73°F | 69°F | 1 ft | 1017.1 hPa | 57°F |
| MKGM4 - Muskegon, MI | 13 mi | 26 min | SE 8.9 G 14 | 75°F | 1017.2 hPa | 56°F | ||
| HLNM4 - 9087031 - Holland, MI | 21 mi | 54 min | E 9.9 G 16 | 75°F | 1017.2 hPa | 55°F | ||
| 45168 | 47 mi | 26 min | E 9.7 G 12 | 67°F | 56°F | 1 ft | 1017.2 hPa | 50°F |
| SVNM4 - South Haven, MI | 47 mi | 36 min | ESE 8.9 G 12 | 75°F | ||||
| LDTM4 - 9087023 - Ludington, MI | 62 mi | 54 min | ESE 6 G 8.9 | 75°F | 55°F |
Wind History for Holland, MI
(wind in knots) EDIT (on/off) Help| 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 | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | E G11 | E | E | E G7 | NE G9 | E G12 | E G9 | E | E | E | E | E | E G11 | E G13 | E G15 | E G16 | E | E G14 | E G18 | E G12 | E G15 | E G23 | E G17 | E G17 |
| 1 day ago | NW | NW | N | NE | N | NE | E | E | E | E | E G10 | E | E G9 | E G8 | E | NE G13 | E G15 | NE G13 | E G15 | E G15 | NE G12 | E G12 | E G10 | |
| 2 days ago | N G13 | N G9 | N G12 | NE | N | N | NE G10 | NE | NE G11 | NE | NE G10 | NE | NE G13 | NE G12 | NE | NE G11 | NE G11 | NE G9 | NW | NW | NW | NW | NW | NW G17 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Muskegon, Muskegon County Airport, MI | 9 mi | 71 min | E 12 G 19 | 10.00 mi | Mostly Cloudy | 78°F | 54°F | 43% | 1018.1 hPa |
| Holland - West Michigan Regional Airport, MI | 23 mi | 73 min | SE 10 G 19 | 10.00 mi | Fair | 77°F | 55°F | 48% | 1018 hPa |
Link to 5 minute data for KMKG
Wind History from MKG (wind in knots)
| 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 | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | NW | W | Calm | Calm | E | E | E | E | E | SE | SE | SE | E | E | SE G19 | E | E G20 | E G19 | ||||||
| 1 day ago | NE | NE | NW | N | NE | NE | NE | E | E | E | E | E | E | E | E | NE G18 | E | E G17 | NE G14 | E | ||||
| 2 days ago | N | N | N | N | E | N | NE | N | NE | NE | N | N | G14 | NE | NE | E | E |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
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GOES Local Image of 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 (19,4,5,8)
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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. |