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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 6:44AM | Sunset 8:40PM | Wednesday April 25, 2018 2:43 AM EDT (06:43 UTC) | Moonrise 2:59PM | Moonset 3:50AM | Illumination 75% |  |
Marine Forecasts
EDIT (on/off) Help| LMZ845 South Haven To Holland Mi- 1016 Pm Edt Tue Apr 24 2018 .small craft advisory in effect from 2 am edt Wednesday through late Wednesday night... Rest of tonight..North winds 10 to 20 knots. Cloudy with a slight chance of rain through about 2 am, then partly cloudy overnight. Waves 1 to 2 feet building to 4 to 6 feet after midnight. Wednesday..Northwest winds 15 to 25 knots. Sunny. Waves 4 to 6 feet. Wednesday night..North winds 10 to 20 knots becoming west around 5 knots toward daybreak. Clear. Waves 3 to 5 feet subsiding to 1 to 2 feet toward daybreak. Thursday..Southwest winds 5 to 10 knots. Sunny. Waves 1 foot or less. | LMZ845 Expires:201804250930;;455605 FZUS53 KGRR 250216 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1016 PM EDT Tue Apr 24 2018 For waters within five nautical miles of shore on Lake Michigan LMZ845-250930- |
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 250357 afdgrr area forecast discussion national weather service grand rapids mi 1157 pm edt Tue apr 24 2018 latest update... aviation Synopsis Issued at 321 pm edt Tue apr 24 2018 high temperatures from the 50s to near 60 are expected the rest of the week compared to normal highs of lower 60s for this time of year. Scattered rain showers this afternoon and evening will exit the area Wednesday morning. Another chance of rain showers arrives late Thursday night and Friday with a cold front which ushers in a cool air mass for the weekend, again keeping highs in the 50s. Above normal temperatures into the 70s are then expected early next week. Update Issued at 1036 pm edt Tue apr 24 2018 a cold front is moving into the northwest portion of the forecast area at 10pm up near ludington and baldwin. The front is expected to progress rapidly to the south overnight. By 800am, the front should be exiting the southern portion of the forecast area along i-94. Bands of rain developed earlier this evening, and are in the process of losing some areal extent as of 1030pm. Expect the up and down trend of the precipitation to continue tonight with an overall north to south push. By 800am the rain should be exiting the far south and southeast portion of the forecast area. Temperatures will steadily fall tonight on increasing north winds. Lows will range from 35-40 across central lower michigan to the lower to middle 40s across southern lower michigan. Short term (this evening through Thursday) issued at 321 pm edt Tue apr 24 2018 no impact weather is expected and no changes from the previous forecast. Main concern in this time period is precipitation trends today and tonight. Agree with previous forecaster that activity should increase this afternoon and evening. At 2 pm edt a cold front extended roughly along a duluth, minnesota to omaha, nebraska line. A strong attendant upper pv anomaly seen on water vapor imagery. This feature will intensify as it cross lower mi overnight. Precipitation over central lower mi appears to be associated with mid-level fgen and should become heavier as fgen increases ahead of the PV max. This feature will be displaced eastward by the PV maximum and that should be an end to the rain. However, some of the convection allowing models suggest that sprinkles will be possible up around us-10 later in the morning behind the cold front. As noted previously afternoon cloud development could be substantial. As winds shift to a northwest direction in the afternoon, temperatures |
will stay chilly by the lakeshore from grand haven southward (that is, where the lakeshore is more northwest-facing). Thursday looks quieter with less wind and clouds. Long term (Thursday night through Tuesday) issued at 321 pm edt Tue apr 24 2018 a mid level trough will be dropping down from the northwest to start the period. One shortwave associated with this feature arrives in the great lakes region Thursday night into Friday morning. Overall this feature is shown to be weakening with time. Enough moisture and lift are forecasted to support some shower activity which I will keep in the forecast. The next mid level vort MAX arrives Friday night. There are some differences with the models. The high res euro is further south... Tracking the system close enough to the area to support some precipitation. The GFS is north and would keep it dry. Will feature only low pops for this potential system for parts of the region. Temperatures at 925 mb from the high res euro are positive through most of the night. That would limit the risk for snow if this more southern track verifies. A cooler than normal pattern sets up for the weekend behind this system. Big warmup early next week. Deep warm air advection and the arrival of a thermal ridge supports well above normal temperatures. I did nudge temperatures up somewhat over the forecasted guidance. Aviation (for the 06z tafs through 06z Wednesday night) issued at 1145 pm edt Tue apr 24 2018 a mix of MVFR ifr conditions will gradually improve toVFR overnight through mid morning and low clouds gradually dissipate and exit.VFR conditions will then continue through the day Wednesday and Wednesday evening. Northwest winds will ramp up to around 10-20 kts late Wednesday morning through the afternoon with highest gusts at kmkg. Marine Issued at 321 pm edt Tue apr 24 2018 timing of current small craft advisories look on track and no changes are planned. Hydrology Issued at 321 pm edt Tue apr 24 2018 with no significant precipitation expected, river stages will continue to fall and the 5 current advisories should be able to be dropped relatively soon. Grr watches warnings advisories Mi... None. Lm... Small craft advisory until 8 pm edt Wednesday for lmz848-849. Small craft advisory until 2 am edt Thursday for lmz844>847. Update... Duke synopsis... Tjt short term... Tjt long term... Mjs aviation... Laurens hydrology... 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 |
| HLNM4 - 9087031 - Holland, MI | 11 mi | 44 min | NNW 12 G 13 | 43°F | 1015.2 hPa (-0.0) | 42°F | ||
| SVNM4 - South Haven, MI | 20 mi | 44 min | N 11 G 13 | 42°F | ||||
| 45029 | 20 mi | 24 min | NNW 9.7 G 9.7 | 42°F | 38°F | 1 ft | 1016.6 hPa | 38°F |
| 45168 | 22 mi | 24 min | SE 9.7 G 14 | 41°F | 40°F | 1 ft | 1016.8 hPa | 36°F |
| 45161 | 39 mi | 44 min | NNE 14 G 18 | |||||
| MKGM4 - Muskegon, MI | 42 mi | 34 min | NNE 12 G 16 | 49°F | 1017.2 hPa | 37°F | ||
| SJOM4 - St. Joseph, MI | 44 mi | 44 min | NNE 6 G 8 | 45°F | 1015.6 hPa (-0.7) |
Wind History for Holland, MI
(wind in knots) EDIT (on/off) Help| 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 | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | SE G7 | E | E | E | E | E | E | E | E | NW | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| 1 day ago | NE | NE | NE | NE G14 | NE G15 | NE G14 | NE G15 | E G14 | NE G12 | E G12 | NE G13 | E G13 | E G14 | NE G11 | N | N | N G21 | N G17 | N G13 | S | S | S | S | S |
| 2 days ago | E | E | E | E | E | SE G10 | E G10 | E G13 | E G18 | NE G14 | E G13 | NW G14 | N G19 | N G17 | N G16 | N | N | E | E | E | E | E |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Holland - West Michigan Regional Airport, MI | 7 mi | 51 min | NNW 5 | 10.00 mi | Overcast | 54°F | 50°F | 87% | 1015.8 hPa |
| South Haven, South Haven Area Regional Airport, MI | 22 mi | 47 min | N 0 | 10.00 mi | Fair | 46°F | 43°F | 89% | 1015.6 hPa |
Wind History from BIV (wind in knots)
| 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 | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | S | SE | SE | E | E | E | SE | SE | SE | SE | SE | NE | NE | E | NE | NW | W | N | Calm | E | Calm | N | NE | N |
| 1 day ago | NE | NE | NE | E | NE | NE | E | E | NE | NE | NE | E | E | E | NE | NE G15 | NE | E | E | S | S | S | S | SE |
| 2 days ago | Calm | Calm | Calm | E | E | E | E | SE | E | E | E | E | E | E G17 | NE G17 | E | E | E | NE | E | E | E | E | E |
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 (2,6,7,8)
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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. |