Friday, August23, 2019 L-36.com


Marine Weather and Tides
Port Huron, MI

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:42AMSunset 8:21PM Friday August 23, 2019 4:17 PM EDT (20:17 UTC) Moonrise 11:35PMMoonset 1:31PM Illumination 42% Phase: Third Quarter Moon; Moon at 23 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- 343 Pm Edt Fri Aug 23 2019
Tonight..Northeast winds 10 to 15 knots. Mostly clear. Waves 2 to 4 feet.
Saturday..Northeast winds 10 to 15 knots. Sunny. Waves 1 to 3 feet.
Saturday night..Northeast winds 10 to 15 knots veering to the east in the late evening and overnight. Clear. Waves 1 to 3 feet.
Sunday..Southeast winds 10 to 15 knots. Sunny. Waves 1 to 3 feet. SEe lake huron open lake forecast for days 3 through 5.
LHZ443 Expires:201908240315;;097108 FZUS53 KDTX 231943 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 343 PM EDT Fri Aug 23 2019 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. LHZ443-240315-


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 231938
afddtx
area forecast discussion
national weather service detroit pontiac mi
338 pm edt Fri aug 23 2019

Discussion
The center of the broad surface high moving across lake superior and
southern ontario will continue to influence the region today while
an upper trough axis swings into the eastern great lakes by tonight.

A convergence zone that set up earlier in the day brought isolated
to scattered showers across the thumb. These were supported by
instability over the lakes as north to northwesterly flow brought
reinforced cooler air over the warmer waters. Slight chance for
scattered shower activity has mostly come to an end off lake huron.

Isolated shower development will remain possible for the next hour
or so across the thumb to the i-69 corridor as the hybrid lake breeze
releases inland. The loss of daytime heating will allow any shower
potential to diminish by the evening. The remainder of southeast
michigan will remain dry with a general cloud clearing trend into
tonight as the upper trough axis moves east. Mostly clear skies will
bring another cool night with overnight low temperatures in the upper
40s to low 50s for much of southeast michigan.

Upper ridging and broad surface high will transverse the great lakes
region leading to ideal late summer weather conditions through the
weekend. High temperatures to start the weekend will be slightly
below normal as thermal trough is maintained under cooler north and
easterly flow. Temperatures at 850 mb will be in the 6-8 degree c
range tomorrow resulting in highs in the low to mid 70s. Humidity
will also be low with dewpoints in the 50s. The departing high
pressure on Sunday will bring some subtle airmass modification with
south to southeasterly flow pushing some warmer temperatures into
lower michigan. High temperatures on Sunday rebound to the mid upper
70s to around 80 degrees.

Strengthening LLJ and warm front amplification ahead of an
approaching upper-level trough will increase heat and especially
humidity across SE mi Monday into Tuesday as dew points rise from
the 50s into the low to mid 60s (Monday) and upper-60s to lower-70s
(Tuesday). Will only see a slight uptick in temperatures as they
will be modulated by extensive cloud cover and rain
showers thunderstorms. Best moisture transport will set up across
the great lakes and will allow pw values of 1.50 - 1.75 inches to
build in for both Monday and Tuesday. Some models advertising pw up
to 2.00 inches, but will stay conservative as it lines up more with
ensemble means. On and off showers and thunderstorms are expected to
develop along the warm front Monday with additional help from
embedded shortwaves. Last, breezy conditions will be possible Monday
as tightening pressure gradient sets up across SE mi.

Stacked low pressure system drifting eastward from manitoba into
ontario will drag a cold front across michigan late in the day on
Tuesday (need additional model runs to pinpoint timing) which will
bring the last of the rain and thunderstorms associated with the
humid airmass, before cooler and dry canadian air filters in behind
the front. Post-frontal airmass will bring relief from the humidity
and temperatures as highs in the 70s hold, with gusty conditions
possible as CAA increases mechanical mixing. Long range models are
advertising a second cold front projected to move across michigan
sometime between Friday afternoon and Saturday morning, which would
be the next chance to see precipitation late next week.

Marine
Stable high pressure will broaden further this weekend over the
great lakes bringing about cooler and drier air. Winds are expected
to veer a bit further toward the NE to around 15 knots before
backing northerly and dropping below 10 knots overnight. Primary
marine concern over the next few hours is the dwindling threat for
waterspouts given the warm surface temperatures of lake huron which
have aided in the generation of enhanced instability. Lake effect
showers capable of producing waterspouts have greatly diminished in
coverage and will trend toward clearer conditions by 21z for
southern lake huron. NE winds will continue until Sunday after which
a SE flow pattern sets up through Monday, coinciding with an uptick
in speeds in the 15-20 knot range Monday afternoon. Dry conditions
will prevail through the same period as high pressure remains in
control.

Prev discussion
Issued at 145 pm edt Fri aug 23 2019
aviation...

areas of isolated showers should remain east of the terminals for
the reminder of today as stable high pressure manifests over the
great lakes for the weekend. Mainly sct with brief periods bkn
cumulus coverage has been observed via goes-16 imagery as moisture
advection over the warm waters of lake huron helps to increase the
vapor content of otherwise drier lower-level air. Clouds will
gradually thin-out this evening with the loss of daytime heating.

Winds are expected to veer a bit further toward the NE before
backing northerly and diminishing overnight. So far, there have only
been intermittent weak gusts noted via asos. A dry,VFR forecast
will be maintained through the entirety of the TAF period as this
current pattern holds with more diurnal cumulus expected on
Saturday.

Dtw threshold probabilities...

* low for ceilings at or below 5000 ft through this afternoon
and again on Saturday from 21-00z.

Dtx watches warnings advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Aa am
marine... ... .Kk
aviation... ..Kk
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 mi54 min NNE 16 G 20 67°F 1022 hPa54°F
MBRM4 - 9014090 - Mouth of the Black River, MI 6 mi54 min 72°F 1022 hPa
PSCM4 28 mi18 min NNE 15 G 19 67°F 1040.6 hPa (+0.3)
AGCM4 30 mi48 min 69°F 73°F1021.7 hPa
45149 - Southern Lake Huron 38 mi78 min N 16 G 19 66°F 71°F2 ft1022.2 hPa (+0.5)
45147 - Lake St Clair 46 mi18 min Calm 70°F 74°F1 ft1021.1 hPa (-0.2)
CLSM4 - St. Clair Shores, MI 48 mi18 min NE 18 G 19 70°F 1021.7 hPa (-0.7)

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 mi63 minNNE 910.00 miOvercast70°F51°F53%1022.7 hPa

Link to 5 minute data for KMTC

Wind History from MTC (wind in knots)
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Last 24hrN12
G18
N14NE11NE9--NE7N5CalmCalmN5N4NW4NW6N6NW6N6N8N8N8N9NE10N6NE10N11
1 day agoW9W13W10W10--W4N10N6N7N5N7N8N6N6N6N7N8N7N6N7NW8N7N8N8
2 days agoSE10SE9S10SE10SW27
G43
N9CalmSW5W7--S3SW4CalmNW3W5NW7NW5N6CalmS3S8SE8NW5W7

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.
Link to Loop

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Wind Forecast for Detroit/Pontiac, MI (16,3,4,5)
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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.