|
Marine Weather and Tides
Version 3.4 |
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. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 6:26AM | Sunset 9:15PM | Sunday July 23, 2017 2:58 AM EDT (06:58 UTC) | Moonrise 5:43AM | Moonset 8:28PM | Illumination 0% |  |
Marine Forecasts
EDIT (on/off) Help| LMZ845 South Haven To Holland Mi- 954 Pm Edt Sat Jul 22 2017 Rest of tonight..North winds 5 to 10 knots veering southeast toward daybreak. Partly cloudy. Areas of fog through the night. Waves 1 foot or less. Sunday..Southwest winds 10 to 20 knots. Areas of fog until midday. Mostly Sunny with a slight chance of showers and Thunderstorms. Waves around 1 foot. Sunday night..West winds 10 to 15 knots veering north after midnight. Partly cloudy. Waves 1 to 2 feet. Monday..Northwest winds 10 to 20 knots. Mostly Sunny. Waves 1 to 3 feet. | LMZ845 Expires:201707230915;;676938 FZUS53 KGRR 230154 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 954 PM EDT Sat Jul 22 2017 For waters within five nautical miles of shore on Lake Michigan LMZ845-230915- |
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 230602 afdgrr area forecast discussion national weather service grand rapids mi 202 am edt Sun jul 23 2017 latest update... aviation Synopsis Issued at 328 pm edt Sat jul 22 2017 generally fair weather will continue the next few days with the exception of a few showers and thunderstorms tonight and Sunday north and east of grand rapids. A cold front moving through Sunday afternoon could drive some stronger thunderstorms towards lansing and jackson. Short term (this evening through Monday night) issued at 328 pm edt Sat jul 22 2017 forecast challenge in the near term is for coverage of showers tonight and potential for strong to severe storms Sunday mostly east of grand rapids. For tonight... Expect showers and isolated thunderstorms after midnight across the northern zones as vigorous short wave trough with closed upper low approaches in fast northwest flow regime. This trough will also be driving a cold front through Sunday evening. Sfc convergence ahead of the front combined with afternoon instability and about 30 to 35 knots of 0 too 6 km shear should be enough to generate a line of thunderstorms during the afternoon. The strong west to northwest sfc flow in the afternoon indicates that lake modified air will be driven well inland leading to the convective lake shadow effect and this is also indicated by the ncar hiresw arw which has a line of strong convection forming across the eastern forecast area around 18z to 20z and quickly moving east. So the severe weather threat does appear limited to the eastern zones on Sunday afternoon. Once the storms go past there will be a few instability showers remaining through Sunday night in cyclonic flow which could be diurnally enhanced on Monday before the upper trough axis moves east and sfc ridging builds in for Monday night. Long term (Tuesday through Saturday) issued at 328 pm edt Sat jul 22 2017 Tuesday will start off with high pressure overhead. This fair weather system is predicted to track eastward through the day. Near seasonable temperatures and dry weather are expected. Southerly flow increases Tuesday night into Wednesday ahead of an approaching cold front. Warmer temperatures will make a return to |
the region with highs approaching the mid 80s for many locations. This will also lead to building instability during the day. Any morning showers could turn into thunderstorms for the afternoon. Models do vary on the amount of instability that develops with the high res euro showing much less than the gfs. Either way... The combination of synoptic lift... Instability and a surface cold front approaching will feature a risk for storms in the forecast until the cold front pushes through. A positively tilted mid to upper level ridge is shown to move in for the beginning of the weekend. Will go with dry weather and close to seasonable temperatures. Aviation (for the 06z tafs through 06z Sunday night) issued at 202 am edt Sun jul 23 2017 high confidence for widespread ifr and occasional lifr conditions through 12z, although onset may be slightly delayed farther east at lan terminal. We are much less certain after 12z, but the general expectation is for a rise toVFR visibilities MVFR ceilings with the possibility for thunderstorms moving southeast into the area before 18z. After 18z,VFR should predominate with scattered thunderstorms in the vicinity. Gusty winds with storms will be more likely farther east around jxn and lan terminals. Marine Issued at 328 pm edt Sat jul 22 2017 winds and waves will remain relatively light through the weekend. There could be areas of fog tonight and a low chance of thunderstorms late tonight and through Sunday afternoon. Hydrology Issued at 1123 am edt Sat jul 22 2017 we again escaped the heavy to excessive rain that fell in southern wisconsin and northern illinois. While that area floods, most of our area continues to run drier than normal these past 1 to 2 weeks. With high atmospheric water vapor content, the showers Saturday morning efficiently put down over a half inch of rain but only in a few isolated spots. Scattered showers or storms Sunday will provide only spotty relief to the dry weather. After that, the next potential for a storm will be Wednesday. Grr watches warnings advisories Mi... None. Lm... None. Synopsis... Ostuno short term... Ostuno long term... Mjs aviation... Tjt hydrology... Cas marine... Ostuno |
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 | 47 min | E 4.1 G 5.1 | 67°F | 1008.5 hPa | |||
| SVNM4 - South Haven, MI | 20 mi | 49 min | ENE 8 G 9.9 | 67°F | ||||
| 45029 | 20 mi | 29 min | ESE 1.9 G 3.9 | 67°F | 70°F | 1 ft | 1008.7 hPa | 65°F |
| 45168 | 22 mi | 29 min | E 5.8 G 7.8 | 68°F | 72°F | 1 ft | 1008.7 hPa | 64°F |
| 45161 | 39 mi | 39 min | SSE 1.9 G 3.9 | 67°F | 69°F | 1008.9 hPa | ||
| MKGM4 - Muskegon, MI | 42 mi | 39 min | S 1.9 G 1.9 | 67°F | 1008.3 hPa | 67°F | ||
| SJOM4 - St. Joseph, MI | 44 mi | 59 min | Calm G 1.9 | 70°F | 1009.8 hPa (-0.4) |
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 | SE G12 | E G12 | E G10 | S | S | S | S | SW | SW | W | W | W | W | W | W | W | NW | W | N | -- | SW | N | E |
| 1 day ago | E | W | N | N | S | E | E | E G9 | SW | SW | SW | SW | S | S | NW | N | N | E G8 | E | E | E | SE G16 | NE G7 | E G7 |
| 2 days ago | W | SW | SW | SW | SW | S | NW | NW | NW | NW | S | S | S | SW | S | S | -- | NW | NW | N | N | NE |
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 | 66 min | N 0 | 0.25 mi | Fog | 68°F | 66°F | 93% | 1009.1 hPa |
| South Haven, South Haven Area Regional Airport, MI | 22 mi | 64 min | E 3 | 0.25 mi | Fog | 67°F | 66°F | 99% | 1008.8 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 | SE | SE | SE | SE | SE | S | S | SW | W | W | W | W G20 | W | W | NW | NW | W | W | NW | W | Calm | SW | Calm | Calm |
| 1 day ago | Calm | Calm | Calm | Calm | S | Calm | E | SE | SE | SE | Calm | W | W | W | NW | E | N | E | SE | S | E | E | ||
| 2 days ago | N | W | SW | W | W | W | Calm | W | W | W | W | W | W | W | W | W | W | W | Calm | N | Calm | Calm |
Tide / Current Tables for
EDIT RT Ports Option Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of GreatLakes EDIT  |
Wind Forecast for Grand Rapids, MI (2,6,7,8)
(on/off) Help |  |  |
Ground Weather Radar Station Grand Rapids/Muskegon, MI
(on/off) Help
Ad by Google
|
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. |