Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Grosse Pointe, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:35AMSunset 7:43PM Tuesday March 19, 2019 3:36 AM EDT (07:36 UTC) Moonrise 5:09PMMoonset 6:06AM Illumination 97% Phase: Waxing Gibbous; Moon at 13 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- 1002 Pm Edt Mon Mar 18 2019
Rest of tonight..Southwest winds 5 to 10 knots. Mostly clear. Waves 2 feet or less.
Tuesday..Southwest winds 5 to 10 knots. Partly Sunny. Waves 2 feet or less.
Tuesday night..Southwest winds 5 to 10 knots. Mostly clear. Waves 2 feet or less.
Wednesday..Southwest winds 10 to 15 knots. Mostly Sunny in the morning...then light rain likely early in the afternoon. Light rain late in the afternoon. Waves 2 feet or less.
Wednesday night..Southwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and early morning...then veering to the west early in the morning. Mostly cloudy. Light rain likely until early morning. A chance of light snow after midnight. Waves 2 feet or less.
Thursday..West winds 5 to 10 knots. Mostly cloudy in the morning becoming partly cloudy. Waves 2 feet or less.
Friday..North winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less.
Saturday..West winds 5 to 10 knots. Clear. Waves 2 feet or less. Wave heights are for ice free areas.
LCZ460 Expires:201903190800;;581318 FZUS63 KDTX 190206 RRA GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 1002 PM EDT MON MAR 18 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...High pressure averaging 30.50 inches to hold across the Ohio Valley Monday into Tuesday afternoon to continue to bring calm to light winds. Low pressure clipper system averaging 29.80 inches will then position north of Lake Superior by Wednesday morning and will drag a cold front behind it, bringing SW to W winds up to 25 knots through Wednesday afternoon. LCZ460-190800-


7 Day Forecast for Marine Location Near Grosse Pointe, MI
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location: 42.38, -82.9     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 190710
afddtx
area forecast discussion
national weather service detroit pontiac mi
310 am edt Tue mar 19 2019

Discussion
Near term today through tonight
as of 310 am edt... Another quiet night continues across the region
with high pressure in control at the surface and stable, dry
northwest flow aloft. Earlier remnant altostratus from yesterday's
diurnal heating has largely dissipated or exited east of southeast
michigan, with most areas seeing a brief period of clearing. This
clearing will be short-lived however as patchy mid high clouds
streaming eastward from shearing energy over the plains helps limit
low temperatures to the mid upper 20s.

Quiet and dry weather continues through tonight as the surface high
slowly drifts eastward towards the mid-atlantic region. With the
surface high a bit further east, southwesterly return flow will be
slightly stronger today, albeit still light with gusts largely below
15 mph. Boundary layer profile will be similar to yesterday, and
feature well-mixed and steep low-level lapse rates that will
maximize some low-level moisture and result in bubbling stratocu
again during peak heating this afternoon and early evening. Should
still be a fair amount of sunshine mixed in with the clouds, and
high temperatures will easily reach well into the 40s, with upper
40s possible detroit metro region and saginaw valley. Low
temperatures tonight will settle around freezing.

Short term Wednesday through Thursday night
a ribbon of northern stream PV races south Tuesday night, as
shearing energy exiting east from the central plains interacts and
helps spawn a weak surface low inverted surface troughing for the
day Wednesday. Enough deeper column moisture will be present riding
the heels of a 40 kt LLJ to result in numerous light rain showers
primarily after noon Wednesday and persisting into the evening
hours. Overall rainfall amounts will be light and generally under a
quarter of an inch. The coverage of showers and cloudy skies will
keep temperatures from warming too significantly, but still
expecting highs into the mid upper 40s. It will be breezy during the
day as well with southwest gusts peaking 20-30 mph. As temperatures
fall back into the 30s during the late evening hours, lingering
showers ahead of a cold front boundary diving south from the
northern great lakes may result in some wet snow mixing in at times,
with little to no accumulation. Low temperatures Wednesday night
will range from the low mid 30s.

Brief period of dry weather Thursday as surface ridging attempts to
build northwestward into the region from the central plains. This
will be short-lived as another northern stream wave dives southeast
across the eastern great lakes Thursday night, with rain snow
showers brushing areas closer to lake huron and lake st. Clair.

Highs Thursday in the 40s with lows Thursday night in the low 30s.

Long term Friday through Monday
the long term portion of the forecast will be characterized by
highly amplified flow across north america, with a quasi rex block
pattern setting up over the western CONUS heading into the weekend.

Southeast michigan will be on the eastern side of strong upper-level
ridging resulting in a extended period of dry weather beginning
Friday and continuing through the weekend. The first day of spring
is Wednesday march 20th, and the weekend will shape up to be an
excellent start with abundant sunshine and temperatures in the 50s.

Marine
High pressure will remain over the region today, ensuring quiet
weather with light winds and limited wave action in ice free areas.

Southwest winds will strengthen tonight into Wednesday as the
pressure gradient increases in advance of a cold front. Gusts will
peak near 25 knots on Wednesday across saginaw bay and into portions
of central lake huron. Winds shift to northwesterly and diminish
with the frontal passage Wednesday night. A more modest northwest to
west wind will then prevail Thursday. Potential exists for a period
of stronger northwest winds on Friday, leading to gusts to near
gales over portions of lake huron.

Prev discussion
Issued at 1156 pm edt Mon mar 18 2019
aviation...

midlevel altocumulus is still hanging around far eastern sections of
the CWA at press time. The cloud deck should drift away from the area
during the first couple of hours. QuietVFR weather is in store for
the southeast michigan terminals for the period with dry northwest
flow and residual surface ridging. Return southwesterly flow will
increase modestly on Wednesday advecting moisture back into the
forecast area. The likelihood for diurnal cumulus development will
increase after 17z.

For dtw...VFR conditions tonight with loss of the 9000 ft agl
altocumulus. Diurnal development of cumulus is expected again
Wednesday.

Dtw threshold probabilities...

* low for cig at or less than 5000 ft agl Wednesday.

Dtx watches warnings advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Irl
marine... ... .Mr
aviation... ..Cb
you can obtain your latest national weather service forecasts online
at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CLSM4 - St. Clair Shores, MI 6 mi37 min WSW 4.1 G 5.1 32°F 1028.8 hPa (+0.7)
AGCM4 26 mi43 min 32°F 35°F1027.6 hPa
THLO1 - Toledo Light No. 2 OH 41 mi37 min WSW 8 G 8 36°F
MBRM4 - 9014090 - Mouth of the Black River, MI 48 mi43 min 32°F 1027.3 hPa

Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI7 mi44 minW 410.00 miFair33°F19°F56%1029 hPa
Selfridge Air National Guard Base, MI17 mi41 minW 410.00 miFair31°F20°F66%1028.9 hPa
Troy, Oakland/Troy Airport, MI19 mi42 minWSW 310.00 miFair32°F15°F51%1028.8 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI24 mi42 minN 010.00 miPartly Cloudy32°F22°F69%1028.4 hPa

Wind History from DET (wind in knots)
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Last 24hrCalmW3CalmCalmCalmW3N6N6CalmW4NW7NW6NW5SW4NW7W4S8S5SW6SW5SW5SW4W4W4
1 day agoCalmW4CalmCalmCalmCalmS6S8S8S9SW7S8S9S7SW8S8SW5SW6W4W4SW7W4W3W4
2 days agoW9
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Tide / Current Tables for
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Tide / Current Tables for
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Weather 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.
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Wind Forecast for Detroit/Pontiac, MI (3,6,7,8)
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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.