Marine Forecasts

    EDIT      (on/off)   Help

---

7 Day Forecast for Marine Location Near Harper Woods, MI

   Hourly   EDIT   Help

---

Area Discussion for - Detroit/Pontiac, MI

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KDTX 050354 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1154 PM EDT Sat Apr 4 2020

AVIATION.

Advection of lower tropospheric equivalent potential temperature between 875-725mb led to drizzle and light rain shower activity across much of Southeast Michigan earlier. Substantial cold air advection between 1.0 and 3.5 kft agl has now led to blanket of MVFR overcast overnight with IFR ceilings north of the Detroit terminals. Strong model signal for dry air advection after 09Z which will lead to breakup of MVFR stratus. Mid cloud across southern Michigan will be in place early Sunday before backdoor cold/dry air advection off of Lake Huron post 21Z leads to SKC Sunday night.

For DTW . MVFR deck for all of tonight with a low potential for brief IFR. VFR skies Sunday with SKC developing after 21Z.

DTW THRESHOLD PROBABILITIES .

* High for cigs at or below 5000 ft tonight.

PREV DISCUSSION. Issued at 329 PM EDT Sat Apr 4 2020

DISCUSSION .

Quiet weather for the next several days as a rapidly weakening cold front carrying a few showers eases through the area this afternoon and tonight. Current radar presentation tells the story here just fine - a 4 to 6 hour window for episodic light showers at any one location. Average QPF well under 0.1". Zonal flow regime becomes established tonight allowing surface high pressure over the Upper MS Valley to build into Southeast Michigan during the day Sunday. Clear skies in the post-frontal environment have already expanded into eastern Wisconsin which bodes well for the sunny forecast for Southeast Michigan tomorrow afternoon. Of note, however, will be the tendency for the front to decelerate as mid-level forcing is lost and replaced by increasingly zonal flow aloft. A rather grungy start can therefore be expected to start on Sunday before drier northerly flow ushers boundary layer moisture south of the border. Under full sun, temps rebound into the low to mid 50s by late afternoon.

Zonal flow regime keeps the baroclinic zone suppressed near or south of the state line into midweek. Seasonal temperatures during this time will be accompanied by plenty of mid and high clouds ensuring a grungy pattern Monday into Wednesday. Given the proximity of the warm front to southern Michigan and fast-moving mid-level flow, a rather ill-defined chance for showers will exist as well particularly as the front bulges north in advance of digging northern stream energy late Monday into Tuesday.

MARINE .

Showers are streaming in across Lake Huron this evening associated with an eastward progressing cold front. Coverage of these showers is expected to remain more scattered in nature, especially across the southern waterways. The front clears to the east by midnight ushering in cooler and drier conditions from renewed northwest flow as a ridge translates toward the region. Surface high currently centered over Minneapolis will build into the central Great Lakes late tonight and hold through Monday morning. This will maintain a subdued and gradually veering surface wind given a relaxed pressure gradient. A few gusts to 20 knots is possible along the northern international border late tonight. A low pressure system approaches late Monday with increasing chances for rain and storms by Tuesday.

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

AVIATION . CB DISCUSSION . SF MARINE . KK

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
CLSM4 - St. Clair Shores, MI	7 mi	63 min	NW 5.1 G 8.9	49°F			1017.9 hPa (+1.0)
AGCM4	28 mi	45 min		48°F	40°F		1017 hPa
THLO1 - Toledo Light No. 2 OH	42 mi	63 min	NW 11 G 12	47°F
MBRM4 - 9014090 - Mouth of the Black River, MI	49 mi	51 min		39°F			1017.8 hPa

Wind History for Fort Gratiot, MI

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

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

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

Last 24hr

N9

NW3 G6

NW5

N5

NW6

N5

N4

E5

N2

E1

S3

S5

S7

S4

S3 G6

S7

S6 G9

S7 G10

SW9

W5 G8

N5 G8

N9

N10 G13

N15

1 day ago

N1

NW3

N4

N8

N6

N7 G10

N6

N14

N11 G14

N12 G15

N17

N17

N17

N17

N14

NE15

NE13

N11

N12

N9

N7 G10

NE5

N5

N9

2 days ago

W3

W2

W2

W4

W7

NW9 G13

NW7 G10

NW6 G9

NW7 G10

NW9 G16

NW6

NE7

NE7

E11

NE10

NE7

NE4

N3

N2

N1

W3

NE3

N1

NE2

---

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
Coleman A Young Municipal Airport, MI	2 mi	70 min	NNW 5	10.00 mi	Overcast	49°F	44°F	83%	1018 hPa
Troy, Oakland/Troy Airport, MI	13 mi	68 min	NNW 5	10.00 mi	Overcast	47°F	45°F	94%	1018.3 hPa
Selfridge Air National Guard Base, MI	16 mi	68 min	NW 7	10.00 mi	Overcast	48°F	48°F	100%	1017.7 hPa
Detroit, Detroit Metropolitan Wayne County Airport, MI	22 mi	70 min	NNW 8	7.00 mi	Overcast	48°F	44°F	86%	1018.1 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI	24 mi	68 min	NNW 7	3.00 mi	Drizzle	48°F	46°F	94%	1017.3 hPa

Link to 5 minute data for KDET

Wind History from DET (wind in knots)

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

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

Last 24hr

NE4

E4

Calm

Calm

Calm

Calm

Calm

Calm

Calm

SW3

Calm

S4

SW5

S7

S7

SW7

SW5

SW6

W3

NW7

NW4

NW5

NW5

N8

1 day ago

Calm

Calm

Calm

Calm

W3

Calm

Calm

NW3

N8

NE6

N6

N9

N6

N8

E7 G15

SE12 G16

E9

E6

E9

E8

E9

NE3

Calm

NE4

2 days ago

W4

W4

W3

W3

W5

NW5

NW3

NW4

NW6

NW8

N10

N6

NW10 G16

N8

N6 G14

N6 G13

N9 G16

5 G16

N5

--

--

S4

Calm

NE4

---

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 (0,6,7,8)

      (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.