Saturday, January25, 2020
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Marine Weather and Tides
Grosse Pointe Woods, MI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:50AMSunset 5:37PM Saturday January 25, 2020 8:47 AM EST (13:47 UTC) Moonrise 8:36AMMoonset 6:24PM Illumination 0% Phase: New Moon; Moon at 0 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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LCZ460 Lake St Clair- 947 Pm Est Fri Jan 24 2020
Rest of tonight..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. Cloudy. Areas of fog this evening. Light rain this evening...then light rain likely after midnight. Waves 2 feet or less.
Saturday..Light and variable winds becoming southwest 5 to 10 knots late in the afternoon. Cloudy with light showers likely and a chance of light snow showers. Waves 2 feet or less.
Saturday night..Southwest winds 5 to 10 knots becoming west 10 to 15 knots in the late evening and overnight. Cloudy. A chance of light snow showers in the evening...then a chance of light snow after midnight. Waves 2 feet or less.
Sunday..West winds 10 to 15 knots. Cloudy. A chance of light rain and snow in the morning...then a chance of light rain in the afternoon. Waves 2 feet or less.
Sunday night..West winds 10 to 15 knots. Cloudy with a chance of light rain. Waves 2 feet or less.
Monday..Northwest winds 5 to 10 knots. Cloudy. Waves 2 feet or less.
Tuesday..Northwest winds 5 to 10 knots. Mostly cloudy. Waves 2 feet or less.
Wednesday..West winds 5 to 10 knots. Mostly cloudy. Waves 2 feet or less. Wave heights are for ice free areas.
LCZ460 Expires:202001250930;;471102 FZUS63 KDTX 250247 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 947 PM EST Fri Jan 24 2020 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...Low pressure, 29.70 inches, will continue to move over southern Lake Michigan before sliding across Lower Michigan during the day Saturday. The low will push east of the region late Saturday into Sunday. The eastern edge of broad high pressure, 30.20 inches, centered over the northern Plains settles over the region Monday. LCZ460-250930-


7 Day Forecast for Marine Location Near Grosse Pointe Woods, MI
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location: 42.43, -82.9     debug


Area Discussion for - Detroit/Pontiac, MI
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FXUS63 KDTX 251111 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 611 AM EST Sat Jan 25 2020

AVIATION.

Very moist low level conditions will remain entrenched over the southeast Michigan airspace today, as a low pressure system slowly tracks across the region. Widespread IFR to LIFR conditions this morning in a combination of low stratus and fog will only gradually improve with time today under modest diurnal mixing. This environment will support periodic bouts of very light precipitation today, primarily in the form of rain or drizzle as temperatures lift into the middle and upper 30s. However, snow may mix with the rain at times. A window for light snow and a meaningful reduction in visibility centers this evening /00z-05z/ as the low exits the region. IFR or low MVFR conditions likely to persist throughout Saturday night.

For DTW . Existing fog will gradually lift through late morning as diurnal mixing ensues. Some pockets of light precipipation will be possible today and tonight. Best potential for some snow showers centered early tonight.

DTW THRESHOLD PROBABILITIES .

* High in ceilings below 5000 feet through tonight.

* High in ptype as mix of rain and/or melting snow during the daylight period. Moderate in ptype as snow tonight.

PREV DISCUSSION. Issued at 321 AM EST Sat Jan 25 2020

DISCUSSION .

Surface occlusion lifting into Southeast Michigan this morning is denoted by a wind shift to light southwesterly in Lenawee and Monroe Counties and a very diffuse temperature and dewpoint gradient. Mesoanalysis and NAM12 cross-sections indicate more meaningful cold air residing just above the surface, which supports the observed reduction in surface stability that has occurred with its passage. As expected, visibility has improved at the southern border warranting a cancellation of the dense fog advisory there. Elsewhere, dense fog is pervasive enough warrant a blanket advisory into the mid-morning. Improving visibility will lift north during the morning, roughly coincident with the surface wind shift which will be fully through the CWA by 15z. Feasible that patchy fog could hang on along the glacial ridge or in the northern reaches of the Thumb until that time. Quiet weather through today with mild temperatures and cool cyclonic flow supporting disorganized rain/snow showers. As the resident closed low is ushered east late tonight into Sunday, moist cyclonic flow will be aided by modest lake enhancement warranting high chc pops for scattered snow showers. Temperatures hover on the warm side of normal but skies remain overcast for most or all of next week given the nondescript surface pressure pattern during the early week period followed by strengthening split flow and a steady stream of mid/high clouds by week's end.

MARINE .

Southeasterly winds will continue to slowly veer to west-northwest during the day today as the center of the low crosses the lower peninsula and central Lake Huron. Rain and snow shower chances remain into early Sunday night. The weaker pressure gradient tied to this system is limiting wind potential and gusts should stay below 20-25kts over Lake Huron.

DTX WATCHES/WARNINGS/ADVISORIES. MI . Dense Fog Advisory until 8 AM EST 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 . MR DISCUSSION . JVC MARINE . KDK

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
CLSM4 - St. Clair Shores, MI 3 mi48 min SW 7 G 9.9 35°F 1010.5 hPa (+1.0)
AGCM4 24 mi48 min 35°F 34°F1009.3 hPa (+0.6)
MBRM4 - 9014090 - Mouth of the Black River, MI 45 mi48 min 1008.6 hPa (-0.0)
THLO1 - Toledo Light No. 2 OH 45 mi108 min SW 11 G 12 35°F
FTGM4 - 9014098 - Fort Gratiot, MI 47 mi48 min SW 7 G 9.9 1008.4 hPa (+0.0)

Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI6 mi55 minSW 86.00 miLight Rain Fog/Mist35°F34°F96%1010.2 hPa
Selfridge Air National Guard Base, MI14 mi1.9 hrsSSW 61.25 miFog/Mist37°F36°F100%1008.5 hPa
Troy, Oakland/Troy Airport, MI17 mi53 minSW 55.00 miLight Rain32°F32°F100%1009.8 hPa

Link to 5 minute data for KDET

Wind History from DET (wind in knots)
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Last 24hrE8E8E11E10E10E12E12E11E9E11E12E9SE7SE4S4S4S5SE5S6S6SW6SW5SW8SW8
1 day agoSE4SE3S3S5SE4S6E5SE4E4SE4SE5SE4E3NE4E4E4E5E3NE5NE6E5E11E9E8
2 days agoSW10SW11
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SW13SW14SW12S13S11S8SW8S7S6S5CalmS5S6S4S4S4S5S4S5SE3S3S3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS 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 (8,2,3,4)
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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 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.