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Marine Weather and Tides
Version 3.4 |
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 5:54AM | Sunset 9:05PM | Thursday July 18, 2019 2:11 PM EDT (18:11 UTC) | Moonrise 9:32PM | Moonset 6:28AM | Illumination 97% |  |
LHZ362 Lake Huron From Presque Isle Light To Sturgeon Point Mi Beyond 5nm Off Shore- Lake Huron From Sturgeon Point To Alabaster Mi Beyond 5nm Off Shore- 950 Am Edt Thu Jul 18 2019
Rest of today..South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. A chance of showers and Thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon.
Tonight..South winds 10 to 15 knots. A chance of showers and Thunderstorms. Waves 2 to 4 feet.
Friday..South winds 10 to 15 knots decreasing to 5 to 10 knots early in the afternoon. Waves 1 to 3 feet.
Friday night..Southwest winds 5 to 10 knots. A chance of showers and Thunderstorms after midnight. Waves 2 feet or less.
Saturday..Southwest winds 5 to 10 knots. Waves 2 feet or less.
Sunday..North winds 5 to 10 knots. A chance of showers and Thunderstorms in the late evening and early morning. Waves 2 feet or less.
Monday..North winds 5 to 10 knots. A chance of showers and Thunderstorms early in the morning. Waves 2 feet or less.
Rest of today..South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. A chance of showers and Thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon.
Tonight..South winds 10 to 15 knots. A chance of showers and Thunderstorms. Waves 2 to 4 feet.
Friday..South winds 10 to 15 knots decreasing to 5 to 10 knots early in the afternoon. Waves 1 to 3 feet.
Friday night..Southwest winds 5 to 10 knots. A chance of showers and Thunderstorms after midnight. Waves 2 feet or less.
Saturday..Southwest winds 5 to 10 knots. Waves 2 feet or less.
Sunday..North winds 5 to 10 knots. A chance of showers and Thunderstorms in the late evening and early morning. Waves 2 feet or less.
Monday..North winds 5 to 10 knots. A chance of showers and Thunderstorms early in the morning. Waves 2 feet or less.
LHZ362 Expires:201907182015;;252733
FZUS63 KDTX 181350
GLFLH
Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
950 AM EDT Thu Jul 18 2019
For waters beyond five nautical miles off shore on Lake Huron
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.
.SYNOPSIS...A warm front, 29.80 inches, will from west to east
across Lower Michigan this afternoon and evening before stalling
over Lake Huron tonight. A cold front is then forecast to move
across Upper Michigan on Friday before slowly pushing south
across Lake Huron Saturday, then into the Ohio Valley on Sunday.
High pressure is then forecast to expand across the Great Lakes
early next week.
LHZ362-363-182015-
7 Day Forecast for Marine Location Near Harrisville, MI
Hourly EDIT Helplocation: 44.99, -82.16 debug
Area Discussion for - Gaylord, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kapx 181707 afdapx area forecast discussion national weather service gaylord mi 107 pm edt Thu jul 18 2019 Update Issued at 1031 am edt Thu jul 18 2019 early morning convective complex across wi has steadily diminished in intensity and coverage through the morning hours... Ultimately leaving little in the way of precipitation expected to affect northern michigan today. Suite of hi-res guidance has remained consistent with this thought over the past several hours - followed by mainly dry conditions continuing to prevail this afternoon and evening. Only wrench in this thought is the warm front currently stretched from eastern luce county southward to near kcad (even picked up well on radar), that's currently kicking off a few isolated pulse-like non-severe storms across eastern upper and the tip of the mitt. Primary updates to today's forecast have been lowering pops area- wide and diminishing cloud cover for locations east of interstate 75 (or at least slowing the cloud increase) as latest satellite imagery suggests primarily just cirrus blow off from upstream over lake michigan and far NW lower. Near term (today through tonight) issued at 343 am edt Thu jul 18 2019 impactful weather: chances for showers and thunderstorms. Some severe storms and heavy rain possible. Pattern synopsis and forecast: a shortwave trough and associated sfc low pressure was in ontario early this morning, with an associated warm front extending se through the arrowhead of mn through wi down to far SRN lake michigan. A second shortwave on the SRN end of strong wsw flow aloft, and it's associated sfc low was seen in ne. Another warm front extends east through ia, where sfc dew points were as high as the upper 70s. There were associated llj's resulting in theta-e advection ahead of these fronts, helping fire off showers and storms, aided by dpva and upper divergence. These areas of convection were at the lake superior ontario border, as well as at the ia mn border. NRN michigan was only seeing some passing high level clouds. The aforementioned shortwaves and sfc lows track ene and drag the warm front from mn wi into NRN michigan late this morning and early afternoon, while dpva, upper divergence and theta-e advection increase. This is later than originally expected, but seems like a decent bet for seeing showers and some thunderstorms at that time. Provided we do not have any particularly thick convective debris cloud around, the atmosphere will be able to destabilize decently to maybe 1000-1500j kg of mlcape, while effective bulk shear is expected to be an impressive 40kts or so, suggesting the potential for a few organized storms capable of damaging winds and large hail. Most of this forcing departs by late afternoon, with both the nam GFS suggesting subsidence and strong capping of the atmosphere around 800-850mb, suggesting lesser no further convective activity. Then things get a little more unclear heading into tonight. Latest data suggests a second surge of theta-e air (those high sfc dew points in ia), while a more unidirectional wsw oriented strengthening LLJ develops, resulting in decent chances for nocturnal convection while shear remains 35-40kts. This appears to be more of a chance for NRN lower michigan, but exactly where is uncertain. If we do get this convection, a continued chance for some severe storms holds. Heavy rainfall totals are also possible, as the air mass moistens substantially with pwat's increasing to 2.00" or maybe more, while storm training is possible. After all said, and it's been said over and over, this is convection, and anything can change in an instant. Highs today will largely be in the lower to middle 80s, with lows tonight mainly in the upper 60s to lower 70s. Short term (Friday through Saturday) issued at 343 am edt Thu jul 18 2019 Lingering shower and thunderstorm chances... high impact weather potential... Moderate. Primary forecast concerns... Dangerously high heat indexes Friday then pops and the potential for severe storms Friday night into Saturday the upper level ridge centered to our south continues to build |
northward through Friday before getting suppressed Saturday. This setup is expected to lead to very uncomfortable to even dangerously hot and humid conditions across the region (especially Friday). Convective evolution through this period remains uncertain. The most likely scenario is for any ongoing convection early Friday to scoot off to the east Friday morning. A tenuously strong cap will likely inhibit convective development Friday afternoon, but will have slight chance pops just in case something is able to pop. Another round of convection possibly firing off to our west Friday evening could progress across northern michigan overnight Friday into Saturday (best chance across northern lower). Heavy rainfall remains possible with precipitable water values of between a whopping 1.5 and 2.5 inches. In addition, there is still the potential for damaging wind gusts with 0-6 km bulk shear values remaining between 40 and 50 knots across eastern upper and far northern lower. Air temperatures are expected to reach into the lower and mid 90s Friday and combine with dewpoints in the low and mid 70s to likely produce heat indexes of between 95 and 105 degrees with highest readings in the southeast part of the forecast area. This would be heat advisory territory so try to plan accordingly and limit outside exposure to the Sun and stay hydrated. Temperatures are then expected to be generally a few degrees cooler Saturday along with slowly lowering relative humidity levels. Long term (Saturday night through Wednesday) issued at 343 am edt Thu jul 18 2019 Cooler and less humid... high impact weather potential... Little to none expected. Heights steadily drop off Sunday into early next week before beginning to rise again toward mid-week. Drier air is expected to end the shower and thunderstorm threat Sunday. However, there are still a few extended models that continue pops... Leaving the blend with slight or low chance pops. Will leave the pops in for now but wouldn't be surprised if they end up being stripped out by later shifts. Temperatures will back off Sunday and especially Monday and Tuesday before rebounding some Wednesday. Humidity levels are expected to be in the more comfortable range through the period. Aviation (for the 18z tafs through 18z Friday afternoon) issued at 105 pm edt Thu jul 18 2019 low pressure will continue to shift northeastward through ontario this afternoon into the overnight hours. Late this morning early afternoon... A warm front continues to trek northeast across northern michigan, resulting in occasionally gusty southwest winds. Much of the area should remain dry for the afternoon into the evening hours except for some early taf-period shower thunder chances at pln and apn... With latest trends suggesting dry weather holds through much of the overnight hours as well. However, there is a low chance for isolated shower storm development this evening into tonight, in which any storm may contain the potential for gusty wind. Prevailing CIGS expected to beVFR at all TAF sites, although MVFR ifr certainly possible under any shower storm. Marine Issued at 343 am edt Thu jul 18 2019 low pressure moving through ontario today will pull a warm front and tighter pressure gradient through NRN michigan, resulting in many nearshore waters around lake michigan likely seeing low end advisory wind speeds. Another warm front and tightening of the pressure gradient arrives Friday night into Saturday, resulting in more potential advisory winds, despite stronger overlake stability. That remains fairly uncertain however. Through Saturday, there will be chances for showers and storms with heavy rainfall and some severe storms possible. The main threats will be for damaging winds and large hail. Apx watches warnings advisories Mi... None. Lh... None. Lm... Small craft advisory until midnight edt tonight for lmz341- 344>346. Ls... None. Update... Mg near term... Smd short term... As long term... As aviation... Mg marine... Smd |
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 |
| 45003 - N HURON 37NM Northeast of Alpena, MI | 44 mi | 82 min | SE 14 G 16 | 61°F | 59°F | 1 ft | 1009.7 hPa (-2.3) | |
| APNM4 - Alpena Harbor Light, MI | 67 mi | 42 min | SSE 15 G 16 | 70°F | ||||
| LPNM4 - Alpena, MI - 9075065 | 67 mi | 54 min | SSE 8.9 G 13 | 73°F | 58°F | 1010.2 hPa | 68°F |
Wind History for Alpena, MI
(wind in knots) EDIT (on/off) Help| 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 | 1 PM | |
| Last 24hr | SE G9 | S | S | S G7 | S | S | S | SE | SE G4 | S | S | W | SW | SW | S | S | SW | S | S | S | SE | SE G11 | S G12 | S G13 |
| 1 day ago | W G13 | W G14 | W G11 | W G12 | NE G11 | NE G7 | E | E | NE G4 | -- | SW | N G5 | N | N | N | N | N G7 | N | N G9 | NE G8 | E | NE G10 | SE G12 | SE |
| 2 days ago | S G9 | S G10 | SW G8 | S | S G11 | S | SE | SW G6 | SW | NW G6 | NW | SW | W | W G10 | W G9 | W G10 | W G9 | W G9 | W G12 | W G12 | W G12 | W G10 | W G9 | W G8 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Oscoda, Oscoda-Wurtsmith Airport, MI | 75 mi | 17 min | S 9 G 15 | 10.00 mi | Fair | 83°F | 67°F | 60% | 1010.2 hPa |
Wind History from OSC (wind in knots)
| 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 | 1 PM | 2 PM | |
| Last 24hr | NE | NE | NE | NE | NE | NE | NE | NE | Calm | Calm | Calm | Calm | NW | Calm | Calm | W | Calm | Calm | S | S | S | S | SW | SW |
| 1 day ago | SW | W | W G18 | SW | W | SW | S | S | NE | N | NE | NE | N | N | Calm | Calm | N | N | NW | N | E | N | NE G15 | NE |
| 2 days ago | W | SE | S | S | S | S | S | SW | SW | SW | SW | SW G20 | SW | SW | SW | SW | SW | SW G16 | SW | W G16 | SW G18 | W G21 | SW G20 | SW G17 |
Tide / Current Tables for
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EDIT (on/off) HelpWeather Map and Satellite Images
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Gaylord, MI (14,3,4,5)
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Ground Weather Radar Station Gaylord, 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. |