Monday, June18, 2018 L-36.com


Marine Weather and Tides
Port Huron, MI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:48AMSunset 9:13PM Monday June 18, 2018 5:12 PM EDT (21:12 UTC) Moonrise 10:23AMMoonset 12:00AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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LHZ443 Port Sanilac To Port Huron Mi- 350 Pm Edt Mon Jun 18 2018
Tonight..Northwest winds 10 to 15 knots becoming north 5 to 10 knots...then increasing to 10 to 15 knots after midnight diminishing to 5 to 10 knots early in the morning. Mostly cloudy until early morning becoming partly cloudy. A chance of showers and Thunderstorms in the evening...then a slight chance of showers and Thunderstorms after midnight. Waves around 2 feet or less.
Tuesday..North winds 5 to 10 knots increasing to 10 to 15 knots late in the afternoon. Partly cloudy. Waves around 2 feet or less.
Tuesday night..North winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Partly cloudy. Waves around 2 feet or less.
Wednesday..North winds 5 to 10 knots early in the morning becoming light and variable...then becoming north 5 to 10 knots in the afternoon. Partly cloudy until late afternoon becoming mostly Sunny. Waves around 2 feet or less. SEe lake huron open lake forecast for days 3 through 5.
LHZ443 Expires:201806190315;;740575 FZUS53 KDTX 181950 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 350 PM EDT Mon Jun 18 2018 For waters within five nautical miles of shore 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. LHZ443-190315-

7 Day Forecast for Marine Location Near Port Huron, MI
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location: 43.04, -82.35     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 181938
afddtx
area forecast discussion
national weather service detroit pontiac mi
338 pm edt Mon jun 18 2018

Discussion
Main focus for this forecast will be heat advisory conditions coming
to a close by the end of today and the potential for some
thunderstorms this afternoon and evening. Upper ridge and high
pressure remain anchored over the southeastern CONUS with good
moisture wrapping around the northern end of the ridge into SE mi.

Warm airmass with 850mb temperatures up to around 20c still forecast
across the southern mi this afternoon. Visible satellite shows a
fair amount of clouds present over mi with thicker clouds across the
thumb and tri-cities and a little more clearing towards the south.

Heat indices across the i-69 corridor and south remain on track to
stay in the upper 90s and low 100s during the remainder of the
afternoon with the combined moisture and heating. Heat advisory will
be allowed to expire early this evening with a cold front set to
progress south throughout the day into tonight that will usher in a
cooler airmass.

A few isolated showers have been able to develop within a moisture
corridor and elevated across far lower mi, though have not amounted
to more than brief showers. The aforementioned cold front will
provide a focus for increasing shower and thunderstorm activity
through the remainder of the afternoon and into the evening with a
few storms already underway across the lower thumb. The environment
ahead of the front in lower mi will be characterized by moderate
instability with SBCAPE values reaching into 1500-2000 j kg range,
but lacking in both shear and steep mid-level lapse rates. The
isolated showers should increase in coverage to more scattered
showers and thunderstorms with the advancement of the front into
this evening. Cloud cover should hamper greater thunderstorm
potential across the tri-cities and northern thumb. Greater thunderstorm
potential will reside across far lower mi where enough clearing has
occurred and good diurnal CU has developed. The conditions are
conducive for a few isolated strong to potentially severe
thunderstorms which could produce some locally strong winds given the
potential for water loading within the high moisture environment.

Once the front advances south of the state line, weather should
begin to quiet down over much of southeast mi for Tuesday. There
will remain some chances for precipitation across the far lower
portion of mi with the front hanging around northern in oh.

Temperatures will drop back into the 70s with northerly flow
sending cooler air southward. Precipitation chances increase again
come Tuesday night into Wednesday as the front is drawn back
northward with a shortwave. Cooler conditions remain for Wednesday
with high temperatures mainly in the 70s.

High pressure will continue to expand southward across the region
Thursday with dry conditions and relatively cool easterly flow.

Temperatures Thursday will continue to run a few degrees below
normal with highs in the 70s and lows Thursday night generally in
the 50s outside of near 60 degree readings in the detroit metro.

Thursday night into Friday, the aforementioned high pressure will
begin sliding off to the east as deep upper-level troughing closed
low over the central CONUS begins to approach the great lakes from
the mid-mississippi valley. Cyclogenesis will likely occur as the
system progresses northeastward over lower michigan Friday through
Saturday with increasingly unsettled weather with scattered to
numerous showers and embedded thunder. This system looks to be
relatively progressive in nature, and will attempt to exit the
region Sunday as dry canadian high pressure tries to build southward
over the great lakes. Highly amplified north american flow heading
into early next week will yield an uncertain forecast that will
ultimately be dependent on the relative position of the main
ridge trough axes over the eastern conus.

Temperatures will continue to remain slightly below normal Friday
and Saturday with the unsettled pattern in place, but begin
moderating back towards normal for the second half of the weekend
into early next week.

Marine
Moderate southwest flow will veer to the northwest with the
passage of a cold front late today. Gusts late today will be limited
to 20 knots or so due to stable over water conditions. A few showers
or thunderstorms may accompany this front into the evening hours.

Winds will veer further to the northwest tonight into Tuesday with
onshore flow of up to 15 knots. Winds will then become weak Tuesday
night into Wednesday before picking up again from the northeast on
Thursday in the wake of another backdoor cold front.

Hydrology
Showers and thunderstorms will accompany a cold frontal passage
late this afternoon into this evening. While this activity will be
scattered in nature, expect one quarter to one half of an inch of
rainfall in some locations. Locally higher amounts will be possible
with some of the strongest storms.

Prev discussion
Issued at 129 pm edt Mon jun 18 2018
aviation...

effective low level front convergence will bring widely scattered
showers to i-94 corridor early in the forecast. Main cold front will
then shift south through the area late afternoon into this evening,
bringing a period of shra tsra chances during the first half of the
evening. Once this front convection shifts south, MVFR stratus will
settle south through the area. These low level clouds should then
slowly lift break out on Tuesday. Winds will veer from southwest to
northwest to northeast over the next 12-18z with this fropa.

For dtw... Southwest winds today of 20 to 25 knots weakening and
veering to west northwest this evening. There will be a few showers
in vicinity of terminal this afternoon with a several hour window
for tsras with cold FROPA this evening. MVFR CIGS will then settle
into the area post front tonight.

Dtw threshold probabilities...

* moderate for ceilings AOB 5000 feet this afternoon, high
overnight tonight.

* low for thunderstorms ~23z-02z this evening.

Dtx watches warnings advisories
Mi... Heat advisory until 6 pm edt this evening for miz060>063-068>070-
075-076-082-083.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Aa irl
marine... ... .Dg
hydrology... .Dg
aviation... ..Dg
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
FTGM4 - 9014098 - Fort Gratiot, MI 4 mi42 min WNW 7 G 16 1011.9 hPa
MBRM4 - 9014090 - Mouth of the Black River, MI 6 mi42 min 1011.6 hPa
PSCM4 28 mi72 min ESE 1.9 G 4.1 1011.5 hPa (-0.7)
AGCM4 30 mi42 min 89°F 1010.5 hPa
45149 - Southern Lake Huron 38 mi72 min NE 3.9 G 3.9 68°F 62°F1010.5 hPa (-1.6)
45147 - Lake St Clair 46 mi72 min WSW 9.7 G 12 76°F 67°F1010.4 hPa (-2.3)
CLSM4 - St. Clair Shores, MI 48 mi50 min SW 15 G 28 91°F 1010.2 hPa

Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Clair County International Airport, MI13 mi17 minNW 610.00 miMostly Cloudy75°F71°F89%1011.5 hPa

Wind History from MTC (wind in knots)
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Last 24hrS7SW10SW9SW7------------------------------W11
G17
------W13
G20
1 day agoS8SE5SE3CalmCalmCalmCalmCalmCalmCalmW4CalmCalmCalmCalmS44E6S7SE10SE12SE12SE13S10
2 days agoS7S5S5E5CalmS5E3S3CalmS4CalmSW6S5CalmE9SE10SE4S5S5SE3W6E6CalmCalm

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 GreatLakes    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Detroit/Pontiac, MI (17,4,5,8)
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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.