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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 6:43AM | Sunset 8:25PM | Wednesday August 21, 2019 7:56 AM EDT (11:56 UTC) | Moonrise 10:33PM | Moonset 11:26AM | Illumination 67% |  |
LCZ460 Lake St Clair- 949 Pm Edt Tue Aug 20 2019
Rest of tonight..Southwest winds 5 to 10 knots. Mostly cloudy with a chance of showers and Thunderstorms in the late evening and early morning...then partly cloudy early in the morning. Waves 2 feet or less.
Wednesday..West winds 5 to 10 knots. Partly Sunny. Waves 2 feet or less.
Wednesday night..North winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less.
Thursday..North winds 5 to 10 knots. Partly Sunny. Waves 2 feet or less.
Thursday night..Northeast winds 5 to 10 knots. Partly cloudy. Waves 2 feet or less.
Friday..Northeast winds 5 to 10 knots increasing to 10 to 15 knots in the evening. Mostly Sunny becoming partly Sunny in the late morning and early afternoon becoming mostly clear. Waves 2 feet or less.
Saturday..East winds 10 to 15 knots. Clear. Waves 2 feet or less.
Sunday..Southeast winds 10 to 15 knots. Mostly clear. Waves 2 feet or less.
Rest of tonight..Southwest winds 5 to 10 knots. Mostly cloudy with a chance of showers and Thunderstorms in the late evening and early morning...then partly cloudy early in the morning. Waves 2 feet or less.
Wednesday..West winds 5 to 10 knots. Partly Sunny. Waves 2 feet or less.
Wednesday night..North winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less.
Thursday..North winds 5 to 10 knots. Partly Sunny. Waves 2 feet or less.
Thursday night..Northeast winds 5 to 10 knots. Partly cloudy. Waves 2 feet or less.
Friday..Northeast winds 5 to 10 knots increasing to 10 to 15 knots in the evening. Mostly Sunny becoming partly Sunny in the late morning and early afternoon becoming mostly clear. Waves 2 feet or less.
Saturday..East winds 10 to 15 knots. Clear. Waves 2 feet or less.
Sunday..Southeast winds 10 to 15 knots. Mostly clear. Waves 2 feet or less.
LCZ460 Expires:201908210815;;959747
FZUS63 KDTX 210149
GLFSC
Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
949 PM EDT Tue Aug 20 2019
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 cold front, averaging 29.80 inches, will drop into
the northern Great Lakes from Canada tonight. This front will
move across the southern Great Lakes on Wednesday. A broad
Canadian high pressure, averaging 30.20 inches, will then expand
across the Great Lakes region Thursday and Friday.
LCZ460-210815-
7 Day Forecast for Marine Location Near Village of Grosse Pointe Shores, MI
Hourly EDIT Helplocation: 42.46, -82.67 debug
Area Discussion for - Detroit/Pontiac, MI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kdtx 211036 afddtx area forecast discussion national weather service detroit pontiac mi 636 am edt Wed aug 21 2019 Aviation Low stratus and fog has developed overnight, generally north of ptk. Clearing overnight interacted with ample low level moisture to produce this. There has been a fair amount of variability to the low stratus fog, which will only persist with the onset of daytime heating. The daytime mixing will allow this moisture to develop a sct to bkn CU field by afternoon. A cold front will push into the region from the north late this afternoon and early evening. Strong mid level capping suggests a very low probability (less than 20 pct) of convection at the terminals. The higher tsra chances will be across the thumb region and points east where mid level capping will be weaker. For dtw... The subtle downslope into metro detroit and later clearing of the mid cloud deck as thus far inhibited anything other some some brief MVFR type vsby in fog; which will erode shortly after taf issuance. Thunderstorm chances late this afternoon evening are expected to be confined to the far northeastern portions of the detroit airspace with stronger capping at dtw likely inhibiting convection at the airport. Dtw threshold probabilities * moderate in ceilings at or below 5000 ft this afternoon and evening. * low in thunderstorms this evening. * low in crosswind thresholds being exceeded this evening. Prev discussion Issued at 352 am edt Wed aug 21 2019 discussion... another round of afternoon evening precipitation yesterday left the near-surface layer at or near saturation overnight with patchy fog developing this morning across much of the area. Expect the greatest coverage across the thumb and saginaw valley where clearing occurred earlier last night. Any fog or low clouds will mix out by mid-morning. A similar, albeit slightly cooler, air mass is in place today compared to yesterday, with dew points well into the 60s and 850mb temps in the mid teens c. Highs will reach the mid 80s upper 80s around metro detroit with heat indices in the upper 80s to lower 90s under partly cloudy skies. The upper low currently near james bay will drop a potent shortwave across the northern great lakes this afternoon and evening, which will force a cold front south across SE michigan by this evening. An unstable environment remains in place today, but model soundings indicate a decent cap in the 700-800mb layer which should hold off much convection given the lack of forcing. The cap is slightly weaker across the tri-cities and especially the thumb, and with better forcing arriving via the front, expect scattered showers and storms to develop in these regions this afternoon. The 50+ kt 500mb |
jet will sag south into the central great lakes and contribute to bulk shear on the order of 35-40 kt by the late afternoon early evening, coincident with peak heating and frontal passage. Progged cape values this afternoon reach about 1000 j kg. This may allow some stronger storms to develop primarily in the thumb with wind gusts in excess of 40 mph possible. The best window for this activity to occur will fall between 2 and 8pm. Any showers and storms will move out by this evening as the cold front pushes through. Drier northwest wind will usher in a cooler air mass tonight that persists through the late week. Just a slight chance of showers across the southern counties tomorrow afternoon as a disturbance moves along the frontal boundary stalled over the northern ohio valley. Another lobe of vorticity will drop from the canadian upper low tomorrow night into Friday, bringing a reinforcing shot of cool air. Highs Thursday through Saturday will reach the mid 70s with lows in the 50s. High pressure will drift across the region during this time, leading to quiet and pleasant conditions. Return flow sets up as the ridge axis passes to the east Sunday, allowing warmer and more seasonable air to return to the great lakes for early next week. The next chance for precipitation comes Monday as a midlevel low attempts to bring a surge of tropical moisture northward. Marine... a cold front will drop south across lake huron this afternoon before pushing into lake erie tonight. The front will trigger a few thunderstorms, mainly on southern lake huron. A few of these could be strong. Strengthening north-northwest winds will develop within the post frontal cold air advection tonight, especially on lake huron. There is moderate to high probabilities that wind gusts across lake huron will range between 25 and 30 knots tonight. This will result in hazardous conditions for small craft on the nearshore waters of lake huron. Strong high pressure will slowly expand into the great lakes from the north Thursday and Friday, leading to a gradual decrease in the winds and waves. Any agitated cumulus may be able to produce waterspouts later today into tonight across southern lake huron, lake st. Clair, and lake erie. Water temps are in the 70s near 80 in the western basin of lake erie and 850mb temps will fall to around 9 to 10c, providing plenty of instability. Convective cloud depths approaching 25 kft and relatively weak 850 mb winds both lend additional support. Dtx watches warnings advisories Mi... None. Lake huron... Small craft advisory from 8 pm this evening to noon edt Thursday for lhz441>443. Lake st clair... None. Michigan waters of lake erie... None. Aviation... ..Sc discussion... Tf 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 |
| 45147 - Lake St Clair | 2 mi | 56 min | Calm | 73°F | 75°F | 1 ft | 1012 hPa (-0.0) | |
| CLSM4 - St. Clair Shores, MI | 11 mi | 56 min | WNW 2.9 G 6 | 70°F | 1013.5 hPa (+0.3) | |||
| AGCM4 | 13 mi | 56 min | 68°F | 74°F | 1012.7 hPa (+0.0) | |||
| MBRM4 - 9014090 - Mouth of the Black River, MI | 38 mi | 56 min | 70°F | 1012.4 hPa (-0.3) | ||||
| FTGM4 - 9014098 - Fort Gratiot, MI | 40 mi | 56 min | W 1.9 G 5.1 | 69°F | 1012.5 hPa (-0.0) | 66°F |
Wind History for Fort Gratiot, MI
(wind in knots) EDIT (on/off) Help| 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 | 7 AM | |
| Last 24hr | SW | SE | S | SW G10 | S G12 | S G12 | SW G13 | S G16 | S G14 | S G14 | SW G13 | S G10 | S | S | SW G21 | SE | S | N | S | S G9 | SW G8 | SW | SW | W G5 |
| 1 day ago | W G9 | NW G10 | NW | NE | NE | NE | E | NE | NE | E | NE | NE | N | NE | -- | SW | S | S | SW | SW | SW G9 | SW G9 | SW | S |
| 2 days ago | S | S G9 | S | S G11 | SW G15 | SW G17 | SW G14 | SW G18 | S G11 | S G18 | S G17 | S G12 | SW G9 | SW G15 | SW G13 | SW | SW G11 | SW G13 | SW G10 | W G10 | W | SW | W | W |
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 |
| Selfridge Air National Guard Base, MI | 14 mi | 60 min | WNW 5 | 10.00 mi | Partly Cloudy | 68°F | 68°F | 100% | 1012.6 hPa |
| Coleman A Young Municipal Airport, MI | 19 mi | 63 min | W 3 | 10.00 mi | Fair | 69°F | 68°F | 96% | 1012.6 hPa |
Link to 5 minute data for KMTC
Wind History from MTC (wind in knots)
| 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 | 7 AM | |
| Last 24hr | Calm | E | SE | SE | SE | SE | SE | SE | SE | S | SE | SW G43 | Calm | NW | W | |||||||||
| 1 day ago | W | W | NW | Calm | E | S | S | SE | SE | SE | S | S | SE | S | S | S | Calm | Calm | ||||||
| 2 days ago | N | E | S | S | SE | SW G30 | SW | S | S | S | S | S | SW G17 | S | SW | SW | Calm | W |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
(on/off) HelpWeather Map
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 Detroit/Pontiac, MI (7,2,3,4)
(on/off) Help
Ground Weather Radar Station Detroit, MI
(on/off) Help
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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. |