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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 6:55AM | Sunset 8:39PM | Wednesday August 21, 2019 12:41 PM EDT (16:41 UTC) | Moonrise 10:47PM | Moonset 11:40AM | Illumination 65% |  |
LMZ845 South Haven To Holland Mi- 1105 Am Edt Wed Aug 21 2019
Rest of today..West winds 5 to 15 knots. Partly Sunny with a slight chance of showers and Thunderstorms. Waves 2 to 3 feet.
Tonight..Northeast winds 10 to 20 knots. Partly cloudy. Waves 1 to 3 feet.
Thursday..Northeast winds 10 to 20 knots backing north 15 to 25 knots. Mostly Sunny. Waves 1 to 2 feet.
Thursday night..North winds 15 to 25 knots veering northeast 10 to 15 knots after midnight. Mostly clear. Waves 1 to 2 feet.
Friday..Northeast winds 10 to 15 knots backing north late in the day. Sunny. Waves 1 foot or less.
Saturday..East winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Sunday..Southeast winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Rest of today..West winds 5 to 15 knots. Partly Sunny with a slight chance of showers and Thunderstorms. Waves 2 to 3 feet.
Tonight..Northeast winds 10 to 20 knots. Partly cloudy. Waves 1 to 3 feet.
Thursday..Northeast winds 10 to 20 knots backing north 15 to 25 knots. Mostly Sunny. Waves 1 to 2 feet.
Thursday night..North winds 15 to 25 knots veering northeast 10 to 15 knots after midnight. Mostly clear. Waves 1 to 2 feet.
Friday..Northeast winds 10 to 15 knots backing north late in the day. Sunny. Waves 1 foot or less.
Saturday..East winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Sunday..Southeast winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
LMZ845 Expires:201908212100;;987000
FZUS53 KGRR 211505
NSHGRR
Nearshore Marine Forecast
National Weather Service Grand Rapids MI
1105 AM EDT Wed Aug 21 2019
For waters within five nautical miles of shore on Lake Michigan
LMZ845-212100-
7 Day Forecast for Marine Location Near Fennville, MI
Hourly EDIT Helplocation: 42.65, -86.09 debug
Area Discussion for - Grand Rapids, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kgrr 211510 afdgrr area forecast discussion national weather service grand rapids mi 1110 am edt Wed aug 21 2019 latest update... update Synopsis Issued at 300 am edt Wed aug 21 2019 - scattered showers and a few storms this afternoon - dry weather tonight through the weekend - cooler and much less humid Thursday through Saturday Update Issued at 1110 am edt Wed aug 21 2019 no real changes are needed to the going forecast this morning for today. Cold front looks to still be situated just north of the area, and through much of wi as of 15z this morning. There is good model consensus that the better instability and sfc convergence along the front will be across the eastern portion of the area this afternoon. Instability could climb up to as high as 2000 j kg briefly, before the front comes through and stabilizes the atmosphere. We will have the highest chances of showers storms across the ne corner of the area where the best instability and convergence will overlap closer to the sfc low. Even there though, we are not expecting anything more than scattered coverage with limited magnitude of the convergence. We can not rule out a strong storm with anything that develops. Deep layer shear values of 30 knots or so up north would help with that cause. However the window of opportunity up there is small with the frontal passage, that it does not look likely. Much less shear toward the south and east where instability will linger a bit longer. Discussion (today through next Tuesday) issued at 300 am edt Wed aug 21 2019 primary fcst concerns involve determining convective potential later today. In addition to scattered showers the cold front will bring potential for a few thunderstorms this afternoon. It is noted that trends in the latest cams and 00z href members have backed off on convective potential somewhat as compared to earlier guidance runs. This since instability particularly over |
our SE fcst area does not look as it will be quite as strong as guidance indicated in previous model runs. In fact the latest ecmwf only has around 1000 j kg of sb CAPE later today which is significantly less than it indicated yesterday. Nevertheless at least a few thunderstorms are expected this aftn mainly over our SE E fcst area where instability will be relatively stronger just prior to fropa. Svr wx is unlikely given lack of stronger instability. Otherwise areas of fog will continue to develop early this morning and will gradually dissipate during the mid morning hours. Fair wx is forecast tonight through the rest of the week and weekend as a high pressure ridge will take hold of our wx pattern. Temps will be seasonably cooler late this week through the weekend with high temps in the 70's and low temps in the 40's up north to the 50's near to south of the i-96 corridor. Aviation (for the 12z tafs through 12z Thursday morning) issued at 732 am edt Wed aug 21 2019 the dense fog in places will gradually give way to scattered to brokenVFR deck of clouds this morning. There will be some rain showers forming mainly early this afternoon with a local thunderstorm possible mainly toward kjxn. Wind will increase as a well this afternoon with some gusts over 20 knots possible. Then tonight the wind decreases with some risk for fog later tonight. Marine Issued at 300 am edt Wed aug 21 2019 winds and waves will ramp up later today after cold frontal passage with highest waves of around 3 to 4 feet forecast this afternoon and evening. Strongly considered a small craft advisory beach hazards statement but based on a consensus of latest guidance it was felt conditions will likely remain just below SCA criteria. Relatively minimal wind speeds and wave heights are forecast late this week into the weekend with fair wx. Grr watches warnings advisories Mi... None. Lm... None. Update... Njj synopsis... Laurens discussion... Laurens aviation... Mjs marine... Laurens |
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 |
| HLNM4 - 9087031 - Holland, MI | 11 mi | 53 min | WSW 5.1 G 6 | 73°F | 1013.7 hPa | 71°F | ||
| 45029 | 20 mi | 31 min | WNW 3.9 G 5.8 | 73°F | 73°F | 1 ft | 1013.4 hPa | 68°F |
| SVNM4 - South Haven, MI | 20 mi | 41 min | SW 8.9 G 8.9 | 74°F | ||||
| 45168 | 22 mi | 31 min | WSW 7.8 G 9.7 | 74°F | 75°F | 1 ft | 1014.3 hPa | 69°F |
| 45161 | 40 mi | 41 min | WNW 5.8 G 5.8 | 73°F | 72°F | 1 ft | 1013.6 hPa (+0.4) | |
| MKGM4 - Muskegon, MI | 42 mi | 41 min | NW 6 G 6 | 74°F | 1012.9 hPa (+0.0) | 70°F | ||
| SJOM4 - St. Joseph, MI | 44 mi | 41 min | SW 8.9 G 11 | 77°F | 1015.9 hPa (+1.0) |
Wind History for Holland, MI
(wind in knots) EDIT (on/off) Help| 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 | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | |
| Last 24hr | S | S | SE | W | SW G28 | SW | N G13 | NE G7 | -- | NW | SW | SW | SW | SW | SW | S | SW | SW | SW | S | SW | W | W | W |
| 1 day ago | SW | SW | W | W | NW | N | N | N | NE | E | E | E | E | E | NE | E | E | E | E | E | E | S | S | |
| 2 days ago | SE G13 | SE G21 | S G22 | W | SW | SW | SW | SW | W | NW | W | W | W | NW | NW | SW | S | SW | S | NW | N | E | S | SW |
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 |
| Holland - West Michigan Regional Airport, MI | 7 mi | 1.8 hrs | W 9 | 10.00 mi | Mostly Cloudy | 76°F | 72°F | 88% | 1013.7 hPa |
| South Haven, South Haven Area Regional Airport, MI | 22 mi | 66 min | W 5 | 10.00 mi | Fair | 79°F | 72°F | 81% | 1014.6 hPa |
Link to 5 minute data for KBIV
Wind History from BIV (wind in knots)
| 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 | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | |
| Last 24hr | SW | SW | W | W | NE | Calm | SW | SW | Calm | Calm | Calm | W | W | |||||||||||
| 1 day ago | W | SW | W | W | NW | Calm | Calm | Calm | E | NE | Calm | Calm | E | E | E | S | SW | |||||||
| 2 days ago | S | S | S G23 | SW | W G24 | W G16 | W | W | NW | NW | Calm | Calm | Calm | Calm | S | Calm | Calm | SE | Calm |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
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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 (12,3,4,5)
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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. |