Marine Forecasts

    EDIT      (on/off)   Help

---

7 Day Forecast for Marine Location Near Muskegon, MI

   Hourly   EDIT   Help

---

Area Discussion for - Grand Rapids, MI

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KGRR 272352 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 652 PM EST Wed Jan 27 2021

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 330 PM EST Wed Jan 27 2021

- Light Lake Effect Snow Tonight and Thursday

- Ridge Brings Quiet Weather to End the Work Week

- Watching System Over The Weekend for Snow

DISCUSSION. (This evening through next Wednesday) Issued at 330 PM EST Wed Jan 27 2021

-- Light Lake Effect Snow Tonight and Thursday --

Instability is surely in place tonight and Thursday with delta t's on the order of 20C tonight. That is only one portion of the equation however. Moisture, especially in regard to depth is a negative factor with depths noted at less that 5,000ft. The best chance for lake effect on our area will come overnight in a northerly flow and a connection off of Lake Superior. A land breeze will add some convergence to the situation and boost the band a bit, which largely be off shore. There is not much upper support in terms of shortwaves to add moisture or lift. So, scattered snow shower and flurries for the most part. The exception will be at times overnight when a band tries to affect the Points and potentially down towards South Haven. Could envision some light accumulations especially up near the points if the band remains over Mason and Oceana Counties for a time. A localized inch or two now out of question, but most locales inch or less.

-- Ridge Brings Quiet Weather to End the Work Week --

A ridge of high pressure will bring a quiet end to the work week with dry weather expected from Thursday night through Saturday. A cold couple of night for sure tonight and again Thursday night under solid radiational cooling conditions. Single digits will show up again both nights.

-- Watching System Over The Weekend for Snow --

The main focus of the forecast is on the system for the weekend. Trends in the models have not change appreciably from yesterday to today. There may be a slight jog to the north back towards are area though. We will have to see if this trend continues. The wave in question is actually off the coast of British Columbia at this time. The wave dives southward into the trough and is then kicked inland across California on Friday, emerging into The Plains on Saturday. The upper wave is losing some punch as it comes our direction, becoming an open wave with time. At the surface, the low is filling with time as it tracks eastward off to our south. Still, the system makes a close enough approach to the area that we have the threat of a swath of snow across our forecast area. At this time, the southern half of the CWA would stand the best chance, basically along and south of I-96. Too early to make any statements with much certainty however. The operational ECWMF would give a couple inches to the far southwest corner of the CWA, with the GFS painting more of a swath of advisory type snows for the southern half (Saturday night into Sunday).

Ensemble means show the low tracking across Central or Southern portions of Indiana, again losing strength as it does. The GFS shows a fairly high, somewhat shallow DGZ Saturday night and Sunday at AZO. So, it doesn't look like a prolific snow to me even if the GFS pans out. It bears watching for sure as it may reach advisory levels.

AVIATION. (For the 00Z TAFS through 00Z Thursday evening) Issued at 652 PM EST Wed Jan 27 2021

Stratocumulus cloud deck with bases at VFR levels of 3500-4500 ft may develop some breaks in it tonight but then fill back in on Thursday. There could be a few flurries and MVFR cigs, particularly on Thursday afternoon as the northerly winds back to the northwest, but not much expected in terms of vsby reductions. MKG however could see a few brief periods of MVFR or lower vsbys if/when any better lake effect bands impact the terminal there.

MARINE. Issued at 330 PM EST Wed Jan 27 2021

No change made to the going headline. Small Craft Advisory remains in effect through 700am Thursday morning. Northerly winds around 20 knots will keep waves up a bit this evening and tonight at 3 to 5 feet, especially up near the Points and down towards South Haven. A period of lower winds and waves are expected from Thursday into Friday as a ridge of high pressure moves through the region.

Winds on Saturday will ramp up to Small Craft Advisory levels, although winds will be off shore. Highest waves will be found out over the open water.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . Small Craft Advisory until 7 AM EST Thursday for LMZ844>849.



SYNOPSIS . Duke DISCUSSION . Duke AVIATION . Meade MARINE . Duke

---

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
MKGM4 - Muskegon, MI	4 mi	30 min	NE 8 G 9.9	22°F			1032.9 hPa	13°F
HLNM4 - 9087031 - Holland, MI	32 mi	52 min	N 9.9 G 13		33°F		1029 hPa
LDTM4 - 9087023 - Ludington, MI	50 mi	52 min	N 1.9 G 2.9

Wind History for Holland, MI

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

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

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

Last 24hr

N9 G12

N9 G12

N5

NE4

NE4

N6

NE4 G8

N7

NE5

NE7

NE10

E11

E8

E9

E7 G10

NE10

NE5 G9

N11

N15

N17 G21

N11 G16

N11 G15

N12

N11 G14

1 day ago

NE15 G24

NE13 G18

NE16 G26

NE18 G25

NE19 G24

NE14 G21

NE12 G17

NE8 G15

NE14 G18

N12 G16

NE15 G21

NE10 G16

NE9 G16

NE13 G17

NE10 G18

N9 G14

N11 G17

N11 G17

N11 G16

N13

N12

N11 G16

NE6

N10

2 days ago

SE3

SE4 G7

SE4

SE3 G6

SE3

E6

E4

NE4

NE6

NE6

NE2 G5

NE3

NE3 G6

NE4

NE3

E6

NE8 G11

NE6 G9

NE10 G15

NE9 G18

NE10

NE11 G18

NE9 G14

NE10 G15

---

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
Muskegon, Muskegon County Airport, MI	3 mi	45 min	N 7	9.00 mi	Light Snow	23°F	11°F	60%	1031.7 hPa
Fremont Municipal Airport, MI	20 mi	63 min	N 8	10.00 mi	Overcast	21°F	11°F	64%	1029.5 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)

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

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

Last 24hr

N8

N4

Calm

Calm

Calm

N5

N3

N5

NE5

E4

Calm

SW3

Calm

Calm

N4

N9

NW9

N8

N9

N9

N10

N11

N9

N7

1 day ago

NE12 G21

--

E14

NE14 G23

NE13

NE11 G21

NE11

NE11 G19

NE10

NE11

NE11 G21

N12 G20

NE11

N13 G18

N11

N12

N13 G21

N11

N15 G21

N8

N7

N7

N9

N8

2 days ago

SE4

SE3

E3

Calm

Calm

Calm

Calm

Calm

Calm

Calm

Calm

NE8

NE5

NE7

N6

N6

N9

NE10

NE9 G18

NE10

NE8

NE8

NE8

E13

---

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: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East

---

Ground Weather Radar Station

---

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. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply 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.