Monday, March18, 2019 L-36.com


Marine Weather and Tides
Port Sanilac, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:34AMSunset 7:40PM Monday March 18, 2019 9:32 PM EDT (01:32 UTC) Moonrise 3:46PMMoonset 5:26AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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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LHZ463 Expires:201903190815;;568209 Fzus63 Kdtx 181952 Glflh Open Lake Forecast For Lake Huron National Weather Service Detroit/pontiac Mi 352 Pm Edt Mon Mar 18 2019 For Waters Beyond Five Nautical Miles Off Shore On Lake Huron 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 30.50 inches to hold across the ohio valley Monday into Tuesday afternoon to continue to bring calm to light winds. Low pressure clipper system averaging 29.80 inches will then position north of lake superior by Wednesday morning and will drag a cold front behind it, bringing sw to W winds up to 25 knots through Wednesday afternoon. Lhz462>464-190815- lake huron from port austin to harbor beach beyond 5nm off shore- lake huron from harbor beach to port sanilac beyond 5nm off shore- lake huron from port sanilac to port huron beyond 5nm off shore- 352 pm edt Mon mar 18 2019
Tonight..Southeast winds 5 to 10 knots veering to the southwest after midnight. Waves 2 feet or less.
Tuesday..Southwest winds 5 to 10 knots backing to the south late in the afternoon. Waves 2 feet or less.
Tuesday night..South winds 5 to 10 knots becoming southwest 10 to 15 knots after midnight. Waves 1 to 3 feet.
Wednesday..South winds 10 to 15 knots. A chance of rain early in the afternoon. Rain likely late in the afternoon. Waves 3 to 5 feet.
Wednesday night..South winds 10 to 15 knots becoming southwest 5 to 10 knots in the late evening and overnight. Rain likely until early morning. Snow likely late in the evening...then a chance of snow after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight.
Thursday..Northwest winds 5 to 10 knots backing to the west late in the afternoon...then increasing to 10 to 15 knots late in the evening. A chance of rain and freezing rain early in the morning. A chance of rain and snow early in the evening. Waves 1 to 3 feet.
Friday..North winds 15 to 20 knots. Gusts to 30 knots until early evening. Waves 2 to 4 feet.
Saturday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the late morning and early afternoon...then backing to the west until early morning. Waves 2 to 4 feet subsiding to 1 to 3 feet.
LHZ463


7 Day Forecast for Marine Location Near Port Sanilac, MI
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location: 43.54, -82.16     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 190001
afddtx
area forecast discussion
national weather service detroit pontiac mi
801 pm edt Mon mar 18 2019

Aviation
Midlevel altocumulus with diurnal origin is in the process of
exiting the state at press time. QuietVFR weather is in store for
the southeast michigan terminals tonight with dry northwest flow and
residual surface ridging. Return southwesterly flow will increase
modestly on Wednesday advecting moisture back into the forecast
area. The likelihood for diurnal cumulus development will increase
after 17z.

For dtw...VFR conditions tonight with loss of the 7000 ft agl
altocumulus. Diurnal development of cumulus is expected again
Wednesday.

Dtw threshold probabilities
* low for cig at or less than 5000 ft agl Wednesday.

Prev discussion
Issued at 333 pm edt Mon mar 18 2019
discussion...

cold air aloft combined with the strength of late march Sun has
produced steep low level lapse rates marked by upwards of a 100
joules of CAPE across the area. This has lead to increasing diurnal
cu as the day wears on. Broad weak surface convergence across the
area combined with weak PVA moving across southern michigan may
produce scattered sprinkles or a few light showers into the evening
lasting a little longer into the night across the thumb where
shortwave energy will linger. Any precip after sunset maybe become
flurries or light snow showers. Elsewhere skies will clear tonight
allowing lows to drop into the 20s.

Tuesday and Tuesday night will be uneventful with a few clouds as
high pressure will resides over the area. Temperatures will be more
normal for this time of year with highs generally mid 40s and lows
around 30.

For Wednesday and Wednesday night, a strong shortwave will drop
south out of canada into the northern great lakes then move east.

In the meantime a weak shortwave moving out of the midwest will get
drawn into lower michigan by the northern shortwave. The result
will be strengthening 850mb jet up to about 40kts. This will advect
in moisture bringing rapid increase in clouds Wednesday morning with
rain showers quickly moving in early afternoon. Highs will reach the
upper 40s on brisk southerly flow. Showers will continue through
evening before associated cold front moves through by midnight.

Precip will gradually come to an end after passage but may mix or
change to light snow before ending as cold air advects in. No
accumulations anticipated as lows drop to the low to mid 30s by
daybreak.

Looking into the extended forecast period beginning Thursday and
through the weekend, the only period where there is forecasted to be
a slight chance for precipitation is Thursday afternoon across the
thumb region. Apart from that, high pressure will hold over the
area throughout the entire weekend. Mostly sunny skies will allow
for the warmer temperatures to make a return to spring, with highs
rounding out in the 50s.

Marine...

high pressure dominating the weather through tomorrow as it drifts
gradually to the east of the region. The result will be a stretch of
favorable marine conditions with quiet weather consisting of light
winds and limited wave action in the ice free areas. Next
opportunity for elevated winds and rain comes Tuesday night into
Wednesday with increasing southwesterly gradient flow ahead of an
advancing cold front. Gusts will reach into the 25 knot range during
with time. Post-frontal northwesterly winds will gradually diminish
Wednesday night, but remain elevated with gusts of around 15-20
knots through Thursday. Gusts nearing 30 knots arrive early Friday
morning and afternoon with a second push of cold air into the
central great lakes before high pressure returns bringing favorable
conditions for the weekend.

Dtx watches warnings advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Aviation... ..Cb
discussion... Drc sp
marine... ... .Aa
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
PSCM4 22 mi32 min 32°F 1027.1 hPa (+0.3)
HRBM4 - 9075014 - Harbor Beach, MI 33 mi38 min SSW 6 G 8 31°F 35°F1026.2 hPa26°F
FTGM4 - 9014098 - Fort Gratiot, MI 39 mi38 min SW 6 G 8 35°F 1026.4 hPa24°F
MBRM4 - 9014090 - Mouth of the Black River, MI 41 mi38 min 37°F 1026.5 hPa
KP58 47 mi41 min S 2.9 32°F 1026.4 hPa26°F

Wind History for Harbor Beach, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Clair County International Airport, MI47 mi37 minN 010.00 miOvercast34°F23°F65%1027.4 hPa

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Last 24hr------------------------------------------------
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2 days ago------------------------------------------------

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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wmap_A
GOES Local Image of    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 (21,6,7,8)
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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.