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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 6:00AM | Sunset 9:04PM | Wednesday May 23, 2018 6:48 AM EDT (10:48 UTC) | Moonrise 1:49PM | Moonset 2:19AM | Illumination 61% |  |
Marine Forecasts
EDIT (on/off) Help| LHZ422 Inner Saginaw Bay Sw Of Point Au Gres To Bay Port Mi- 331 Am Edt Wed May 23 2018 Today..Light and variable winds becoming east 5 to 10 knots late in the afternoon. Sunny. Patchy dense fog early in the morning. Waves around 2 feet or less. Tonight..East winds 5 to 10 knots early in the evening becoming light and variable...then becoming southwest 5 to 10 knots after midnight. Clear. Waves around 2 feet or less. Thursday..Southwest winds 5 to 10 knots. Sunny. Waves around 2 feet or less. Thursday night..Southwest winds 5 to 10 knots. Clear. Waves around 2 feet or less. SEe lake huron open lake forecast for days 3 through 5. | LHZ422 Expires:201805231530;;392193 FZUS53 KDTX 230731 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 331 AM EDT Wed May 23 2018 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LHZ422-231530- |
7 Day Forecast for Marine Location Near Bay City, MI
Hourly EDIT Helplocation: 43.58, -83.88 debug
Area Discussion for - Detroit/Pontiac, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kdtx 231033 afddtx area forecast discussion national weather service detroit pontiac mi 633 am edt Wed may 23 2018 Aviation Satellite would suggest variability in the depth of the fog layer across SE mi early this morning. From ptk up through fnt, the fog may persist past 13z given the depth indicated on satellite. As for metro detroit and mbs, the shallow nature of the fog and recent vsby trends suggest visibility improvement by 12z or shortly thereafter. Otherwise, high pressure overhead will sustain clear skies and light winds through the TAF period. Dtw threshold probabilities * none. Prev discussion Issued at 240 am edt Wed may 23 2018 discussion... morning fog, especially north of i-69 where dense fog has developed (issued dense fog advisory down to the m-59 corridor), will burn off by mid morning as the late may Sun GOES to work. Dry and warm stretch of weather will commence today as upper level ridge axis advances into the central great lakes region, arriving on Friday. Large diurnal temperature swings in store, and with large surface high (1022+ mb) lingering tonight, fog remains a possibility, as 00z nam condensation pressure deficits crash overnight, although NAM may be a bit too aggressive and will just include patchy fog for now. 850 mb temps of 12 to 13 c today will support highs near 80 degrees. Low to mid 80s on Thursday as low level southwest winds begin to take hold and 850 mb temps reach and slightly exceed 14 c. Good warm return flow around the high on Friday will support highs in the mid |
to upper 80s as 850 mb temps reach and slightly exceed 17 c. Airmass looks to remain relatively stable right through Friday. The airmass will then destabilize over the weekend as height falls take place and general troughing becomes established over the great lakes region, although bulk of upper level energy disturbances to track through the northern great lakes. None-the-less, sufficient instability moisture likely over southeast michigan to lead to some shower and thunderstorm activity, but coverage and timing remains problematic this far out. Cold front still draped across far southern lower michigan on Monday will maintain the low chance, but large surface high looks to build back in Monday evening into Tuesday, per 00z euro, providing another couple days of dry and warm weather. Marine... light west-northwest winds will occur across the lakes this morning ahead of high pressure now centered over southern lake michigan. Winds will become light and variable during the course of the afternoon as this high expands across lakes huron and erie. The high will sustain light and variable winds into Thursday. As the high drifts to the east coast by Friday and a slow moving front approaches from the northwest, light south-southwest winds will develop by Friday and will persist into the weekend. Dtx watches warnings advisories Mi... Dense fog advisory until 9 am edt this morning for miz047>049- 053>055-060>063-068>070. Lake huron... None. Lake st clair... None. Michigan waters of lake erie... None. Aviation... ..Sc discussion... Sf marine... ... .Sc you can obtain your latest national weather service forecasts online at |
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 |
| SBLM4 - Saginaw Bay Light #1, MI | 18 mi | 48 min | W 6 G 7 | 56°F | 1019 hPa (+1.4) | |||
| 45163 | 32 mi | 48 min | N 1.9 G 1.9 | 54°F | 56°F | |||
| GSLM4 - Gravelly Shoals Light MI | 35 mi | 68 min | W 5.1 G 6 | 56°F | 1019.6 hPa | |||
| TAWM4 - Tawas City, MI | 52 mi | 68 min | NW 5.1 G 7 | 53°F | 1019 hPa |
Wind History for Harbor Beach, MI
(wind in knots) EDIT (on/off) Help| 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 | 5 AM | 6 AM | |
| Last 24hr | N | N | N | N | N | N | N G10 | N | N | N G14 | N G16 | N G18 | N | N G11 | NW | W | W | W | W | SW | SW | W | W G11 | W G10 |
| 1 day ago | SW | E | SE | SE | SE | SE | SE | E | NE | N | NE | -- | NE | NE | E | E G5 | SE | N | SE | N | NE | NE | NE | N |
| 2 days ago | NW G18 | N | N G17 | N G18 | N G14 | N G12 | N | N | N G11 | N | N | NE | NE | N | NW | SW | SW | N | N | NW | SW | W | SW | NW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Saginaw County H W Browne Airport, MI | 10 mi | 73 min | WSW 3 | 0.50 mi | Fog | 50°F | 48°F | 94% | 1019.3 hPa |
| MBS International Airport, MI | 11 mi | 55 min | WNW 4 | 7.00 mi | Fair | 51°F | 51°F | 100% | 1019.9 hPa |
| Jack Barstow Airport, MI | 21 mi | 73 min | N 0 | mi | 44°F | 43°F | 100% | 1019.3 hPa | |
Wind History from HYX (wind in knots)
| 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 | 5 AM | 6 AM | |
| Last 24hr | NE | Calm | Calm | Calm | W | W | NW | N | N | N | NW | NW | Calm | E | Calm | SW | S | SE | S | Calm | SW | Calm | Calm | Calm |
| 1 day ago | Calm | Calm | Calm | E | E | SE | SE | SE | SE | SE | Calm | N | NE | NE | E | E | Calm | E | SE | SE | E | NE | NE | NE |
| 2 days ago | NW | NW | N | N | N | NE | NE | NE | NE | NE | NE | N | Calm | E | NE | Calm | E | E | Calm | 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
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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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Detroit/Pontiac, MI (6,6,7,8)
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Ground Weather Radar Station Detroit, 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. |