Marine Forecasts

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7 Day Forecast for Marine Location Near Harbor Beach, MI

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Area Discussion for - Detroit/Pontiac, MI

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Fxus63 kdtx 240341 afddtx area forecast discussion national weather service detroit pontiac mi 1141 pm edt Fri aug 23 2019 Aviation Vfr conditions will prevail with just a bit of lake stratus within northeast flow off of lake huron overnight. Diurnal component to clouds will increase coverage slightly, but still feel sct will hold during the afternoon. Dtw threshold probabilities * none. Prev discussion Issued at 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. Dtx watches warnings advisories Mi... None. Lake huron... None. Lake st clair... None. Michigan waters of lake erie... None. Aviation... ..Dg discussion... Aa am marine... ... .Kk you can obtain your latest national weather service forecasts online at

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
HRBM4 - 9075014 - Harbor Beach, MI	1 mi	55 min	NE 11 G 15	65°F	71°F		1024.9 hPa (+1.2)	54°F
KP58	15 mi	64 min	NE 12	65°F			1024 hPa	54°F
PSCM4	30 mi	55 min	NE 11 G 14	65°F			1042.7 hPa (+1.4)
45008 - S HURON 43NM East of Oscoda, MI	33 mi	35 min	N 12 G 14	65°F	68°F		1024.8 hPa	54°F
45149 - Southern Lake Huron	37 mi	55 min	NNE 12 G 16	65°F	71°F	3 ft	1024.1 hPa
GSLM4 - Gravelly Shoals Light MI	49 mi	55 min	NNE 11 G 15	65°F			1025.1 hPa (+1.4)
TAWM4 - Tawas City, MI	51 mi	75 min	N 5.1 G 8	58°F			1025.4 hPa

Wind History for Harbor Beach, MI

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N6 G10

N5 G10

N7 G12

NW4

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W6

NW7 G11

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N11 G14

NE12 G15

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N11 G17

N11 G17

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N12 G15

NE13 G16

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1 day ago

N16 G20

N12 G16

NW6

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NW6 G9

NW6 G9

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NW5 G8

N10 G14

N14 G17

N12 G15

N11 G16

N12

N12 G15

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N10 G13

N8

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N8 G11

NW4 G7

NW5 G8

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N9 G13

2 days ago

W7

W5 G9

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W9 G14

W8 G11

E9

E9 G12

S6

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W5

N16 G21

N13 G16

N13 G16

N15

N15

N18 G23

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Port Hope, MI	15 mi	3.1 hrs	NNE 11	mi		65°F	53°F	66%	1023.1 hPa
Huron County Memorial Airport, MI	18 mi	3 hrs	N 0	10.00 mi	Fair	53°F	49°F	89%	1024.4 hPa

Link to 5 minute data for KP58

Wind History from P58 (wind in knots)

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N11 G15

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W8 G16

W10 G15

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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    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 (0,6,7,8)

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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.