Wednesday, January27, 2021
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Marine Weather and Tides
Marine City, MI

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:47AMSunset 5:37PM Wednesday January 27, 2021 6:43 PM EST (23:43 UTC) Moonrise 4:23PMMoonset 7:17AM Illumination 100% Phase: Full Moon; Moon at 14 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LCZ422 /o.exp.kdtx.ma.w.0053.000000t0000z-201023t2100z/ 453 Pm Edt Fri Oct 23 2020
.the special marine warning will expire at 500 pm edt... The affected areas were... NEarshore and open waters from port sanilac to port huron mi... St. Clair river... The Thunderstorms over the southern lake huron have moved into the canadian waters and no longer pose a significant threat to boaters. Strong Thunderstorms crossing the st. Clair river will exit east a little after 5 pm, Thus the special marine waters will be allowed to expire. Lat...lon 4300 8242 4296 8242 4292 8246 4282 8248 4276 8247 4262 8252 4263 8257 4276 8251 4284 8251 4301 8246 4311 8250 4313 8248 4323 8251 4343 8253 4343 8220 time...mot...loc 2051z 225deg 47kt 4385 8192 4360 8219 4340 8237
LCZ422 Expires:202010232101;;960207 FZUS73 KDTX 232053 MWSDTX Marine Weather Statement National Weather Service Detroit/Pontiac MI 453 PM EDT Fri Oct 23 2020 LCZ422-LHZ443-464-232101-


7 Day Forecast for Marine Location Near Marine City, MI
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location: 42.71, -82.5     debug


Area Discussion for - Detroit/Pontiac, MI
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FXUS63 KDTX 271942 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 242 PM EST Wed Jan 27 2021

DISCUSSION.

Arctic high pressure will build gradually east/southeast through Ontario and maintain a cold airmass across the area with generally quiet weather conditions. High temperatures will remain in the 20s through the weekend with low temperatures in the single digits to lower teens into early Saturday morning.

While the low level flow from this high will remain very dry, moisture flux will increase over the Great Lakes and provide some lake effect stratus/strato-cu over the next day or two. Lake effect snow showers will continue over Lake Huron and work back onshore over the immediate shoreline of the Thumb to some extent overnight into Thursday. In fact, a few lake effect flurries may even work into a larger portion of the forecast area by Thursday from snow bands working off of Lake Superior and northern Lake Michigan. At this time, any notable accumulations will be localized to the Lake Huron shoreline.

A shortwave within the southern stream will shear east around the base of this high pressure tonight and bypass the area to the south with just a bit of higher level cloudiness brushing the area. The next southern stream shortwave will work onshore over California late today and tonight and then work through the southwest CONUS and emerge over the southern plains by early Saturday.

This system has the potential to bring snowfall to parts of the area by late Saturday night into Sunday/Sunday night. However, the northern extent of heavy snowfall that will be associated with this system remains highly in question as the aforementioned high pressure, centered over Quebec by late in the weekend, will act to shunt the northeastward progress of this system as it encroaches on the region. This will become the biggest challenge of the forecast in the coming days. With the high pressure centered more to the east by that time, temperatures will moderate to some degree with highs closer to 30 from Sunday into early next week and lows in the teens to around 20.

MARINE.

Moderate northerly winds continue through tonight and Thursday as an arctic airmass remains overhead leading to increased mixing depths allowing some stronger winds aloft to mix down closer to the surface. Winds will rotate slightly Thursday afternoon to more NW as the center of arctic high pressure drifts from the WI/IL border to near the MI/IN border. Small craft advisories continue through early Thursday afternoon until the aforementioned wind shift pushes the elevated wave field toward the Canadian side of Lake Huron. NNW winds will weaken some Friday as the center high pressure drifts directly over the central Great Lakes region. Winds then shift to easterly Saturday ahead of the next approaching low that will move from the southern Plains into Ohio Valley by Sunday.

PREV DISCUSSION. Issued at 1229 PM EST Wed Jan 27 2021

AVIATION .

Fairly clear low-levels will continue for the next few hours of the afternoon as arctic high pressure continues to funnel drier air on light north/northwesterly flow. As the flow shifts to more of a dominant northerly trajectory by this evening, enough moisture drifting south off Lake Huron may be enough to support a developing stratocu deck, and coupled with loss of daytime heating, could support pooling into a window of MVFR broken ceilings for a time late this evening into the early overnight. A gradual clearing trend then commences remainder of the overnight as flow backs more northwesterly over the land possible return to SKC by sunrise Thursday for a bulk of the airspace.

For DTW . Confidence remains on the lower end regarding MVFR stratocu ceilings this evening, but will continue to keep TEMPO mention between 23z-02z. Otherwise, passing mid/high cloud will attempt to slowly drift southeast overnight allowing for a window of SKC towards daybreak Thursday with north/northwesterly winds 6-10 knots.

DTW THRESHOLD PROBABILITIES .

* Low in ceilings at or below 5000 feet late this afternoon into early tonight.

DTX WATCHES/WARNINGS/ADVISORIES. MI . NONE. Lake Huron . Small Craft Advisory until 4 PM EST Thursday for LHZ421-441>443.

Lake St Clair . NONE. Michigan waters of Lake Erie . NONE.

DISCUSSION . DG MARINE . KDK AVIATION . IRL

You can obtain your latest National Weather Service forecasts online at www.weather.gov/detroit.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AGCM4 6 mi55 min 24°F 1025.5 hPa
MBRM4 - 9014090 - Mouth of the Black River, MI 19 mi55 min 24°F 1024.9 hPa
CLSM4 - St. Clair Shores, MI 26 mi43 min N 8.9 G 11 24°F 1026.4 hPa (+1.0)
PSCM4 49 mi43 min NW 8 G 14 21°F 1044.7 hPa (+2.0)

Wind History for Fort Gratiot, MI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Clair County International Airport, MI15 mi48 minNW 510.00 miMostly Cloudy21°F14°F74%1026.4 hPa

Link to 5 minute data for KPHN

Wind History from PHN (wind in knots)
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Last 24hrN5N9NW5NW8
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NW8NW7NW6NW6NW4NW5NW7W8W7NW5NW8NW5NW8NW7
G14
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1 day agoNE7NE6NE7--NE9NE8NE9NE11NE11NE10
G14
NE9NE10NE11NE10NE8N8N6N8N8N6N8
G14
N4N6N3
2 days agoSE4SE3CalmCalmCalmCalmCalmNW4CalmCalmCalmCalmCalmCalmCalmNW3E4CalmE3N5NE6N4NE8NE7

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




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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 numerous 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.