Marine Forecasts

    EDIT      (on/off)   Help

---

7 Day Forecast for Marine Location Near Harbor Beach, MI

   Hourly   EDIT   Help

---

Area Discussion for - Detroit/Pontiac, MI

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KDTX 111609 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1209 PM EDT Tue Aug 11 2020

AVIATION.

A cold front is exiting southeastern Michigan and so is the sct-bkn mvfr ceilings accompanying it. Drier air filtering in behind on a northwesterly flow 10kts or less will lead to clear to few afternoon CU above 4kft. High pressure will move in overnight and continue over the area Wednesday. This will lead to mainly clear skies with light variable winds after sunset. Winds will remain light on Wednesday with an easterly marine flow developing across the southern terminals during the day and a southwesterly across the northern terminals.

DTW THRESHOLD PROBABILITIES.

None

PREV DISCUSSION. Issued at 353 AM EDT Tue Aug 11 2020

DISCUSSION .

A stray shower remains possible over the Tri Cities and Thumb region leading up to sunrise. This is where the western flank of the fully mature MCV has left to brush through coincident with the cold front. Subsidence trailing the circulation combined with incoming confluent flow aloft is expected to prevent any development farther south as the front settles slowly toward the Ontario and Ohio borders. Noticeably less humid air moves into the Tri Cities and Thumb by early afternoon but takes until later in the day before reaching metro Detroit southward. Considerable coverage of low clouds to start the day breaks up during late morning to early afternoon in time to allow high temperatures in the lower to mid 80s.

High pressure gains traction over the Great Lakes tonight bringing clear sky, light wind, and pleasant temperatures settling to lows in the upper 50s outside of metro Detroit. This kicks off a stretch of favorable weather anchored by high pressure lasting through the mid and late week period. Zonal flow aloft extends from the Pacific NW along the Canadian border to the Great Lakes today. It develops just enough ridging over central Canada and the upper Midwest for maintenance of Great Lakes high pressure Wednesday into Thursday. There is also a boost of subsidence provided by the ridge downstream of the short wave shown developing over the central Plains. This small scale feature has been advertised in model solutions over the last several forecast cycles but with nebulous west coast origins. It stalls over the mid MS valley and Midwest during Thursday as large scale height falls get underway over the Canadian Rockies which leads to even more downstream ridging across northern Ontario. The resulting broadening of surface high pressure centered on Quebec then extends back into the Great Lakes providing stable easterly flow into SE Mi through Friday. A wave of low pressure and associated cold front is then shown in extended model solutions making progress into the Great Lakes by Saturday. Moisture and instability parameters suggest this system brings the next chance of showers and thunderstorms to lower Mi Saturday into Sunday.

MARINE .

Light northwesterly flow today gives way to light and variable winds as high pressure builds in from the west tonight and Wednesday. Any lingering showers associated with the early morning frontal passage diminish by afternoon. This leaves dry weather and favorable boating conditions in place as high pressure builds overhead and lasts through late week.

DTX WATCHES/WARNINGS/ADVISORIES. MI . NONE. Lake Huron . NONE. Lake St Clair . NONE. Michigan waters of Lake Erie . NONE.

AVIATION . DRC DISCUSSION . BT MARINE . MV

You can obtain your latest National Weather Service forecasts online at www.weather.gov/detroit.

---

Weather Reporting Stations

   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
HRBM4 - 9075014 - Harbor Beach, MI	1 mi	47 min	N 8.9 G 12	73°F	72°F		1012.9 hPa	61°F
KP58	15 mi	14 min	NW 5.1	79°F			1012.5 hPa	56°F
PSCM4	30 mi	125 min	NW 5.1 G 7	75°F			1031.5 hPa (+1.7)
45008 - S HURON 43NM East of Oscoda, MI	33 mi	25 min	W 7.8 G 9.7	71°F	71°F		1013.1 hPa	66°F
45149 - Southern Lake Huron	37 mi	125 min	NNW 12 G 14	72°F	72°F	2 ft	1012.9 hPa (+1.7)
GSLM4 - Gravelly Shoals Light MI	49 mi	25 min	WSW 8.9 G 11	77°F
TAWM4 - Tawas City, MI	51 mi	25 min	WNW 8 G 13	81°F			1013.9 hPa

Wind History for Harbor Beach, MI

(wind in knots)    EDIT      (on/off)   Help

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

Last 24hr

SE13

S13

S10 G15

SW12 G15

SW8 G12

S3 G6

S6 G9

S7

S5

S9

S6

S5

N16

N12 G15

NE8

W6

N4

NW7 G10

N10 G13

NW6 G9

NW5 G9

N9 G12

N13

N10 G13

1 day ago

SE14 G17

SE13 G16

SE5 G10

E5 G8

SW5

SE4

S2

S4

SW6

SW6

SW5

SW5

SW7

SW8

SW7 G10

SW8 G11

SW12 G15

SW7 G11

W4 G8

W6

W5

S6

SE10

SE12

2 days ago

SE15

S15

SE11 G14

SW9 G12

SW6 G9

SW5

S7

SW4

S6

SW8

SW9 G12

SW10 G14

SW11 G15

SW11 G15

SW10 G13

SW6

W9 G13

W10 G14

W12 G15

W11 G17

W6 G11

W6

S14 G17

SE17

---

Airport Reports

    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.

Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Port Hope, MI	15 mi	74 min	NW 7	mi		78°F	57°F	48%	1012.5 hPa
Huron County Memorial Airport, MI	18 mi	70 min	NNW 8	10.00 mi	Fair	79°F	51°F	39%	1013.9 hPa

Link to 5 minute data for KP58

Wind History from P58 (wind in knots)

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

Last 24hr

SE8

E10

NW6

Calm

E5

Calm

Calm

SE4

S4

S4

4

Calm

NW10 G19

Calm

3

NW4

4

Calm

NW6

NW9 G16

NW8

NW9 G16

NW9 G17

NW7

1 day ago

Calm

Calm

E3

--

Calm

Calm

S3

Calm

Calm

3

Calm

3

3

SW3

3

4

SW6

SW5

SW5

SW5

SW7

SW7

4

SW4

2 days ago

SE7

5 G17

SW7

6

3

4

3

Calm

4

SW7

6

SW5 G19

SW9 G18

SW7

SW8 G15

W8

W7

W9

W7 G18

W8 G18

6 G15

5

W5

E3

---

Tide / Current Tables for

   EDIT   Weekend mode (on/off)   (on/off)   Help

---

Tide / Current Tables for

   EDIT      (on/off)   Help

---

Weather Map

       (on/off)   Help Weather Map

---

GEOS 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

Other links: Northern Pacific     Contential US     Full GOES-East

---

Wind Forecast for Detroit/Pontiac, MI (15,3,4,5)

      (on/off)   Help

---

Ground Weather Radar Station Detroit, MI

   (on/off)   Help

---

Cookie Policy: This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway. 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 numerous 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.