Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Detroit, MI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:32AMSunset 8:27PM Tuesday April 25, 2017 2:37 PM EDT (18:37 UTC) Moonrise 5:24AMMoonset 6:33PM Illumination 0% Phase: New Moon; Moon at 29 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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This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ422 321 Pm Edt Thu Apr 20 2017
.strong Thunderstorms approaching the waters... The areas affected include... St. Clair river... Lake st. Clair... Detroit river... Michigan waters of lake erie... At 320 pm edt...doppler radar indicated numerous Thunderstorms... Capable of producing winds to up 30 knots and small hail. These Thunderstorms were located along a line extending from 13 nm northwest of new baltimore to near elizabeth park marina to near north cape...moving east at 35 knots. Locations impacted include... Elizabeth park marina...gibraltar...port huron...bolles harbor of refuge...woodland beach...stony point...st clair flats old channel light...detroit river light...the ambassador bridge...new baltimore...st. Clair...lake erie metropark harbor...algonac...grosse ile...estral beach...mt clemens harbor of refuge...monroe harbor... Grosse pointe...st. Clair shores and wyandotte. Precautionary/preparedness actions... Mariners can expect gusty winds up to 30 knots...locally higher waves...lightning strikes...and heavy downpours. Boaters should seek safe harbor immediately until these storms pass. && a severe Thunderstorm watch remains in effect until 800 pm edt for southeastern michigan...the adjacent waters of lake erie...and the adjacent waters of lake saint claire. Lat...lon 4173 8350 4177 8350 4196 8332 4266 8284 4272 8269 4270 8261 4265 8255 4289 8252 4302 8247 4301 8242 4261 8252 4255 8259 4254 8266 4237 8283 4231 8307 4223 8313 4205 8315 4196 8311 4172 8341
This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ422 Expires:201704202015;;000755 FZUS73 KDTX 201921 MWSDTX MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 321 PM EDT THU APR 20 2017 LCZ422-423-460-LEZ444-202015-

7 Day Forecast for Marine Location Near Detroit city, MI
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location: 42.38, -83.1     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 251726
afddtx
area forecast discussion
national weather service detroit/pontiac mi
126 pm edt Tue apr 25 2017

Aviation
Cloud deck in the 5-9kft range is quickly eroding/shifting northeast
early this afternoon, so only bkn CIGS will be from diurnal cumulus
development with bases in the 3-4kft range. Even this coverage will
remain scattered for the most part. Otherwise,VFR conditions will
prevail for the forecast with a chance of 5-6sm br late tonight.

Winds will remain southeast, but veer close to due south Wednesday,
becoming rather gusty in the 17z-19z time frame. There is an off
chance of a shra/tsra as kmbs as a warm front lifts quickly north
through the area, but not enough likelihood to mention at this time
as better organized activity appears to hold off to the west and
northwest.

//dtw threshold probabilities...

* none.

Prev discussion
Issued at 351 am edt Tue apr 25 2017
discussion...

the end of the long stretch of dry air is drawing near as a broad
and deep longwave trough develops over the western two thirds of the
country. Plenty of energy within this trough as 150+ knot jet feeds
into it out of the north pacific. For the most part, the area will
remain dry through Wednesday evening as the downstream ridge
steepens in response to this trough. One caveat to this will be a
short period this morning when a band of moisture in a region of
isentropic ascent lifting out ahead of the cutoff low over the se
conus clips the eastern great lakes. Looks like the moisture will be
largely in the 4-10kft layer with dry resident airmass at the
surface needing to be worked over to get precip to reach the ground.

Looks like the wind field will quickly reorient themselves as the
low drifts up the coast today which will pull the moisture and
forcing back east of the region. So just a brief period this morning
of a slight chance of light rain in the forecast around the eastern
thumb, but could end up being more virga than anything.

Will keep a good deal of clouds around today with southeasterly flow
which will moderate temperatures somewhat, but the resident airmass
has proven to be good for temps nearing 70. So expectations are for
much the same, hedging a little lower along the lake shadow for our
eastern locations. Lows tonight will be on the mild side, mostly in
the low 50s, as dewpoints climb with sustained southeasterly flow.

Strong wave will be entering the base of the longwave trough on
Wednesday which will tighten the SW gradient between the trough and
east coast ridge. Initially this will set up the moisture and
instability corridor over western mi and wi. Strong WAA with winds
turning more to the south will send temperatures up toward 80 as 700
to 850mb warm layer spikes in the mid teens. This warm layer should
cap off any attempts at showers drifting east into the area or
developing overhead with the strong mid/upper level lapse rates and
weak upper level instability. Having said that, the SW to NE slope
of the moisture/instability plume may end up clipping part of the
saginaw valley thus they will have a chance of showers and
thunderstorms in the forecast.

Best activity over SE mi will occur on Thursday as a wave noted
earlier exits the base of the trough and lift northeastward into the
great lakes. The associated surface low will pull a cold front
across lower mi. Even a few days out, models are struggling to come
together on orientation of the jet streaks and strength of the
trough. Still enough support with an afternoon cold front, a few
hundred j/kg of cape, shear values over 40 knots, and good moisture
to support high chance pops for showers and thunderstorms.

May get a brief break from showers on Friday before the trough
ejects the next few waves through the weekend. Models do agree with
bringing rain in Saturday ahead of the next low, persisting through
Sunday.

Marine...

a long duration of moderate southeasterly flow will exist through
Wednesday as the region remains between exiting high pressure and
low pressue lifting into the mid mississippi valley. Sustained wind
of 15 to 20 knots at times, but with a higher degree of stability
under this pattern limiting the gust potential. Winds turn
southwesterly as low pressure lifts into great lakes on Thursday.

Dtx watches/warnings/advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Aviation... ..Dg
discussion... Drk
marine... ... .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 13 mi37 min E 8 G 8.9 53°F 1010.5 hPa (-2.0)
AGCM4 35 mi49 min 59°F 1010 hPa
THLO1 - Toledo Light No. 2 OH 39 mi37 min ENE 14 G 15 52°F
THRO1 - 9063085 - Toledo, OH 51 mi49 min ENE 8 G 11 56°F 1008.6 hPa50°F

Wind History for Toledo, OH
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G7

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Detroit, Detroit City Airport, MI5 mi44 minESE 810.00 miOvercast62°F52°F70%1009.8 hPa
Troy, Oakland/Troy Airport, MI12 mi43 minESE 610.00 miFair64°F47°F56%1009.8 hPa
Detroit, Detroit Metropolitan Wayne County Airport, MI16 mi44 minESE 11 G 1610.00 miMostly Cloudy66°F52°F61%1009.4 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI20 mi43 minSSE 510.00 miFair62°F51°F70%1009.5 hPa
Selfridge Air National Guard Base, MI22 mi1.7 hrsESE 910.00 miMostly Cloudy58°F54°F88%1011.2 hPa

Wind History from DET (wind in knots)
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Last 24hrE9E13
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SE13SE12SE9E4E5E5E4E6SE9SE11SE10SE6SE7SE10SE8
1 day agoSE9SE9S12
G17
S9S6S5NW3CalmSE5--NE4N5NE6N6NE6N5--E4NE6E6E9E11E10
G16
E10
2 days agoE10N11
G14
E8E8E8E5SE4E5E3CalmCalmCalmCalmCalmN3CalmCalmCalmS3W4CalmCalmCalmNW4

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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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Detroit/Pontiac, MI (14,3,4,5)
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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.