Wednesday, November22, 2017 L-36.com


Marine Weather and Tides
Hamtramck, MI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:31AMSunset 5:05PM Wednesday November 22, 2017 6:03 AM EST (11:03 UTC) Moonrise 10:51AMMoonset 8:35PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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
LCZ423 /o.can.kdtx.ma.w.0053.000000t0000z-171008t0415z/ 1125 Pm Edt Sat Oct 7 2017
.the special marine warning is cancelled... The affected areas were... Detroit river... Michigan waters of lake erie from detroit river to north cape mi... The Thunderstorms have moved out and no longer pose a significant threat to boaters. Lat...lon 4185 8345 4235 8304 4237 8299 4236 8293 4231 8307 4224 8313 4216 8313 4203 8315 4196 8311 4177 8336 time...mot...loc 0324z 222deg 57kt 4256 8295 4227 8289 4208 8292
This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ423 Expires:201710080334;;532427 FZUS73 KDTX 080325 MWSDTX MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 1125 PM EDT SAT OCT 7 2017 LCZ423-LEZ444-080334-

7 Day Forecast for Marine Location Near Hamtramck, MI
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location: 42.38, -83.04     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 220800
afddtx
area forecast discussion
national weather service detroit pontiac mi
300 am est Wed nov 22 2017

Discussion
Temperatures are holding steady near 30 degrees this morning as the
state remains socked in with lake effect clouds within northwest
flow regime. Passing shortwave is providing just enough lift to
generate flurries over the area as well as some modest banding
extending into tuscola, lapeer, and parts of oakland macomb counties
from saginaw bay. Introduced chc pops given that a couple tenths of
accumulation will be possible within this corridor.

Main forecast issue is very low confidence cloud trends today. Given
satellite trends and existing synoptic support over the area for the
next several hours, confidence is high enough to raise cloud cover
substantially through the early morning. As the mid-level wave exits
east in the 12-15z period, suspect downsloping will begin to take
more of a toll over the saginaw valley and thumb areas. Building
high pressure from the west will contribute to backing boundary
layer flow working southeastward from lake superior during the late
morning, perhaps sufficiently interrupting the superior-michigan
connection enough to allow for additional mid-day cloud erosion.

Developing westerly flow over lake michigan will likely force clouds
back into western and northern portions of the area during the
afternoon. Westerly flow will trend wswly as low amplitude
approaches within NW flow aloft. Even so, expect the bulk of clouds
will pull back toward lake michigan tonight as dry advection forces
stable 0-1km theta-e lapse rates over all but the far east quarter
of the lake. This potential for evening clearing and surface high
pressure centered south of the area may allow for some early
radiational cooling. However, temps will quickly level off or slowly
rise for the remainder of the night as the SW gradient ramps up
ahead of the incoming surface trough. Antecedent dry column will
make any snow hard to come by on Thursday morning. The exception may
be the saginaw valley area where forcing will be a bit stronger and
some modest lake enhancement to low-level moisture field will be
possible. In any case, there is no expectation for accumulation.

Background height rises will contribute to moderating temperatures
Thursday and especially on Friday as nwp continue to indicate a deep
low tracking north of lake superior. Temps will approach or eclipse
50 degrees as the strengthening gradient forces sustained winds of
15 to 20 kts Friday aftn into Fri night. With no gulf moisture feed,
there is a decent chance that the attendant cold front and attendant
llj pass through precipitation-free on Friday night.

Marine
Moderately active weather during the end of week and weekend as a
number of frontal boundaries push directly through southeastern
michigan. Additionally, model data is suggesting that a strong low
pressure system will track west to east across northern ontario
Friday and Friday night. This low pressure system, will likely lead
to increased gradient flow and strong southwesterlies Friday,
veering northwesterly by Saturday. Small craft advisories remain in
effect for nearshore waters off of the thumb due to cold advection
supported northwest winds. Marine headlines are likely in the coming
days. Small craft advisories will be likely for southwest flow on
Thursday. Gale warnings, 35 to 40 knot gales, will then be likely
for a good chunk of the lake huron basin as the pressure gradient
tightens in response to the passing low pressure system.

Prev discussion
Issued at 1157 pm est Tue nov 21 2017
aviation...

late evening satellite observations indicated some breaks developing
in theVFR stratus stratocu over northern lower michigan where also
some streamers of lake effect were reaching down to htl. Expect a
neutral northwest low level wind pattern to continue producing
breaks in the larger scaleVFR cloud coverage during the morning and
reveal bands of MVFR lake effect clouds. The wind direction from
about 310 gives a boost from both lake superior and lake michigan
and favors the MVFR cloud bands to possibly reach mbs and fnt during
the night. The main question is with coverage and prefer to monitor
trends for a few more hours to see precisely where the larger bands
of lake effect clouds stabilize before adding to the terminal
forecasts. Upstream observations over the midwest then support
optimistic cloud conditions over lower michigan by late morning
through the afternoon. There will remain potential for lake effect
contributions to stratocu coverage which will diminish during the
day as high pressure approaches the region and moves into the ohio
valley by Wednesday evening.

For dtw... Colder air moving into the region will produce just a few
gusts near 20 knots during the night. The colder air will also be
dry enough forVFR ceiling right around the 5000 ft threshold before
thinning during the morning through afternoon.

Dtw threshold probabilities...

* high for ceiling 5000 feet or less tonight through mid morning.

Low through afternoon.

Prev discussion...

issued at 257 pm est Tue nov 21 2017
discussion...

cold front will surge through area late this afternoon early this
evening. Lift from upper trough forcing this front aided to some
degree by right entrance region of h25 jet streak lifting up east
side of the trough will maintain a band of rain showers along and
immediately behind this front. Cold air advection will be strong
enough to allow for some of this precipitation to change to snow,
either mixed with the rain or becoming snow showers outright. With
generally light precipitation rates and boundary layer temperatures
in the mid to upper 30s, do not expect any accumulations before the
precipitation ends abruptly in the 22z-02z time frame from north to
south across the forecast area.

Colder air will settle into the area behind this front, with lows in
the low mid 20s tonight and highs no better than the middle 30s on
Wednesday as the core of this cold airmass settles over the central
great lakes. That said, winds will decrease notably as compared to
the past few days, so the "chill" factor will not be as persistent.

A moderation in temperatures will ensue from Wednesday night into
Thursday night as main upper troughing progresses off to the east.

This process will initially be rather slow as another (weaker)
shortwave pivots into the area and maintains some degree of upper
troughing. This should lead to a progression of temperatures from the
middle 20s once again Wednesday night, rebounding to upper 30s to
around 40 Thursday afternoon, but falling back into the mid upper 20s
Thursday night.

Precipitation, after early this evening, will be basically nil with
perhaps a small chance of snow showers again for at least portions
of the area late Thursday night as a stronger warm air advection
pattern begins to set up in advance of the next strong shortwave
that will be dropping out of the gulf alaska region mid late week.

Marine...

a cold front sweeping across the region will bring gusty northwest
winds across the eastern lakes in it's wake this evening through
tonight. The switch from southwest flow to northwest flow has
already begun as the front currently resides over central lake huron
and saginaw bay. The front will pass south of lake erie later this
evening with a secondary trough and cold surge lagging a few hours
behind. Cold air funneling into the region with a tight pressure
gradient will lead to a period of northwest gales across northern
lake huron through most of the overnight period. Slightly weaker
winds across southern huron will not necessitate gales, but small
craft advisories are in effect for a portion of the nearshore waters
around the thumb mainly due to elevated wave heights. Lake-effect
snow showers will be common in the cold air behind the front. Winds
will relax early Wednesday morning as high pressure builds into the
region.

Dtx watches warnings advisories
Mi... None.

Lake huron... Small craft advisory until 1 pm est this afternoon for lhz441-442.

Small craft advisory until 7 am est this morning for lhz421.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Jvc
marine... ... .Jvc
aviation... ..Bt
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 11 mi63 min NW 7 G 15 32°F 1021.7 hPa (+2.7)
AGCM4 32 mi45 min 31°F 1020.8 hPa
THLO1 - Toledo Light No. 2 OH 39 mi43 min NNW 13 G 19 33°F
THRO1 - 9063085 - Toledo, OH 53 mi45 min N 5.1 G 9.9

Wind History for Toledo, OH
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G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI4 mi70 minN 810.00 miOvercast32°F18°F56%1021.8 hPa
Troy, Oakland/Troy Airport, MI13 mi69 minNW 610.00 miOvercast33°F18°F55%1021.7 hPa
Detroit, Detroit Metropolitan Wayne County Airport, MI19 mi70 minNNW 1110.00 miOvercast32°F21°F64%1022 hPa
Selfridge Air National Guard Base, MI20 mi67 minNNW 1010.00 miOvercast31°F21°F68%1021.7 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI20 mi71 minNNW 710.00 miOvercast32°F21°F65%1021 hPa

Wind History from DET (wind in knots)
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Last 24hrSW14SW15
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SW12SW11W10
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W9W10W6NW6NW8NW9NW12
G17
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N7NW7N8N13
1 day agoSW9SW10SW13
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2 days agoNW11
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W8W9
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W7W6W7W10W7SW6SW8SW7SW10SW10SW9

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 (6,6,7,8)
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Ground Weather Radar Station Detroit, MI
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weather_mapweather_map weather_map

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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.