Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Mount Clemens, 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 5:55AMSunset 9:14PM Wednesday June 28, 2017 8:19 AM EDT (12:19 UTC) Moonrise 10:10AMMoonset 11:38PM Illumination 20% 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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LCZ460 Lake St Clair- 353 Am Edt Wed Jun 28 2017
Today..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Mostly Sunny. Waves 2 feet or less.
Tonight..South winds 10 to 15 knots increasing to 15 to 20 knots after midnight. Mostly cloudy until early morning becoming partly cloudy. A chance of showers and Thunderstorms after midnight. Waves 1 to 3 feet.
Thursday..Southwest winds 15 to 20 knots diminishing to 10 to 15 knots late in the afternoon. Mostly cloudy with a chance of showers and Thunderstorms. Waves 1 to 3 feet.
Thursday night..Southwest winds 10 to 15 knots. Mostly cloudy with a chance of showers and Thunderstorms. Waves 2 feet or less.
Friday..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the evening. Mostly cloudy. A chance of showers and Thunderstorms...then showers and Thunderstorms likely in the evening. Waves 2 feet or less.
Saturday..West winds 10 to 15 knots. Partly cloudy. Showers and Thunderstorms likely. Waves 2 feet or less.
Sunday..West winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less.
LCZ460 Expires:201706282000;;940262 FZUS63 KDTX 280753 RRA GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 353 AM EDT WED JUN 28 2017 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 30.10 inches, will drift from the Ohio valley to the east coast through tonight. Meanwhile, low pressure, 29.50 inches, will lift out of the northern plains today. This low will track through the northern Great Lakes tonight and Thursday. Another area of low pressure will then lift into the region on Friday. LCZ460-282000-

7 Day Forecast for Marine Location Near Mount Clemens, MI
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location: 42.58, -82.83     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 280933
afddtx
area forecast discussion
national weather service detroit pontiac mi
533 am edt Wed jun 28 2017

Aviation
A dry and stable environment will exist through the afternoon as
warmer air arrives with the departure of high pressure. Winds will
strengthen from the south-southwest this morning, then turning gusty
for the afternoon period. Plenty of clear sky across the lowest 10k
ft given the dry low level conditions. Area of moisture lifting
northeast, perhaps as a convective remnant of upstream convection,
will approach the mbs corridor early this evening. This will bring
the potential for a period of light rain through early tonight.

While there is a low probability of thunderstorms tonight,
uncertainty in the level instability to support thunderstorms will
preclude any mention. The arrival of a strong low level jet will
introduce a period of low level wind shear tonight and Thursday
morning.

Dtw threshold probabilities...

none.

Prev discussion
Issued at 413 am edt Wed jun 28 2017
discussion...

upper energy pushing from the central rockies into the plains this
morning will work across the great lakes tonight, at the nose of an
upper jet streak. Strong area of diffluence ahead of this feature
interacting with northeastward advancing warm front surface low
pressure, and strong surge of the low-level jet will allow complexes
of thunderstorms to develop over the plains and upper midwest today.

This activity should then progress eastward into michigan during the
afternoon and evening. Best potential for activity to be sustained
as it progresses into the state looks to be more over northern lower
michigan, where the nose of the 60+ knot low-level jet will work in.

Forecast soundings for southeast michigan still signal the influence
of the exiting area of high pressure and shortwave ridging, with
warmer mid-levels and a fairly dry airmass that will require better
forcing to overcome it and or strong moisture transport before we
can see much activity. Forecast is dry for the first half of the day
before showers begin working into the area from upstream during the
late afternoon and evening. Activity will likely be in a state of
decay as it fights a more hostile airmass, leading to just shower
chances mainly north of i-69 through 03z 11pm. Temperatures today
will moderate a little as weak warm air advection occurs on the
northern periphery of high pressure over the ohio valley. This
should boost MAX temps into the mid-upper 70s.

Some forecast models still drop an occluded front southward through
lower michigan during the overnight hours, while others at minimum
show strong theta-e advection within the warm sector south of the
warm front. Either could serve as a focus for renewed convection
over southern michigan as mid-level lapse rates steepen and low-
level jet core surges up through central michigan. Elevated
instability will increase as a result, with nam GFS showalter
indices falling between -1 and -3c allowing thunderstorms to begin
developing. Most of the activity looks to still be focused over
northern michigan, potentially keeping areas near the ohio border
dry until Thursday. Severe threat tonight looks limited, as does
coverage of convection overnight. Although 0-6km bulk shear values
increase to 30-40 knots, CAPE density above the low-level inversion
does not look too impressive for large hail. Elevated convection
will also limit wind gust potential. Heavy rain could occur with
thunderstorms, but fast storm motion and more limited coverage will
mainly keep the heavy rain threat north of the forecast area.

Convection forecast for the end of the week then become more
uncertain as it will in part become reliant on placement coverage of
previous rounds of convection and recovery from them. General
message is that rounds of rain thunderstorms will be possible
Thursday through at least Friday night.

Low-level boundary will continue to drop south through southern
michigan on Thursday as weak surface low lifts through the u.P. Of
michigan. Better coverage of convection will be roughly south of i-
69 as drier air works into northern michigan during the afternoon.

Spc has areas south of i-69 in a marginal risk as instability builds
ahead of the boundary and storms become surface-based. Other
forecast themes for Thursday are breezy conditions, with warmer and
more humid airmass as dewpoints rise into the 60s.

Upper low over alberta will be the next big player in our weather
for the end of the week. This wave will drop into the midwest on
Friday, kicking surface low pressure across the northern great
lakes. Warm front will lift through lower michigan Friday, bringing
another surge of warm air and moisture. Temps warming into the upper
70s to mid 80s with dewpoints well into the 60s should allow CAPE to
build through the day, while 0-6km bulk shear values increase to as
high as 40 knots in the proximity of the warm front. This will bring
a slightly higher severe threat, with SPC day 3 outlook including
all of southeast michigan. Threat for showers tstorms will continue
into the overnight hours as a cold front pushes through the region.

Marine...

southerly winds will develop in the wake of high pressure this
morning. A moderate increase in wind speed may lead to a brief
period of gusts near 25 knots across saginaw bay this afternoon.

Maintenance of a firm southerly breeze into tonight will then
support a more definitive increase in gust potential, leading to
small craft conditions across saginaw bay. The potential for
thunderstorms will exist tonight, particular across central and
northern sections of lake huron. Moderate southerly wind will
sustain a warm and unstable environment through the latter half of
the week. This will maintain unsettled conditions, with the
potential for thunderstorms Thursday through Friday night.

Hydrology...

low pressure tracking into the northern great lakes will bring the
potential for rain and thunderstorms this evening and tonight. The
greatest potential will exist north of i-69, where rainfall amounts
between one quarter and one half inch will be possible through
Thursday morning. Additional showers and thunderstorms may develop
throughout Thursday and Thursday night as warm and increasingly
humid air builds into the region. The threat for rainfall will tend
to focus south of the i-69 corridor during this time as a frontal
boundary sinks into the region. Average rainfall amounts generally
less than one half inch, but localized higher amounts in excess of
an inch will be possible within any more concentrated areas of
thunderstorms. Another low pressure system tracking west of the
region will maintain the threat for thunderstorms Friday and Friday
night. Should a more focused region of heavy rainfall emerge, then
the potential for a corresponding rise of area rivers and streams,
as well as minor flooding will be possible. While river flooding
continues to ease across central lower michigan, this corridor will
be the most susceptible to flooding risks.

Dtx watches warnings advisories
Mi... None.

Lake huron... Small craft advisory from 10 pm this evening to 10 pm edt Thursday
for lhz421-422.

Lake st clair... None.

Michigan waters of lake erie... None.

Aviation... ..Mr
discussion... Hlo
marine... ... .Mr
hydrology... .Mr
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 8 mi80 min SW 6 G 8 59°F 1019.3 hPa (+0.7)
45147 - Lake St Clair 13 mi80 min NE 7.8 G 7.8 63°F 66°F1 ft1018.3 hPa (+0.7)
AGCM4 16 mi50 min 60°F 1019 hPa
MBRM4 - 9014090 - Mouth of the Black River, MI 35 mi50 min 59°F 1018.4 hPa
FTGM4 - 9014098 - Fort Gratiot, MI 37 mi50 min WSW 6 G 9.9 59°F 1018.5 hPa49°F

Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Selfridge Air National Guard Base, MI3 mi22 minNNE 910.00 miA Few Clouds63°F50°F63%1019.3 hPa
Coleman A Young Municipal Airport, MI14 mi27 minWSW 710.00 miFair61°F48°F63%1019.7 hPa
Troy, Oakland/Troy Airport, MI19 mi26 minSW 410.00 miFair60°F45°F59%1020.3 hPa

Wind History from MTC (wind in knots)
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NW6NW10E4E5CalmCalmSW3W4W3W5W5W5SW3SW5N9
1 day agoW12W13W13
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2 days agoW10W16W17
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W9W6W11W8NW9NW10
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W5W5W5SW3SW3SW5SW6SW6SW5SW5W7W10

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 (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 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.