Monday, September28, 2020
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L-36.com

Marine Weather and Tides
Reed City, MI

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:32AMSunset 7:26PM Monday September 28, 2020 10:59 PM EDT (02:59 UTC) Moonrise 5:37PMMoonset 3:02AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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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LMZ849 Pentwater To Manistee Mi- 1005 Pm Edt Mon Sep 28 2020
.small craft advisory in effect through Wednesday evening...
Rest of tonight..Northwest winds 15 to 25 knots. Partly cloudy with a chance of rain showers. Waves 3 to 5 feet.
Tuesday..Southwest winds 15 to 20 knots. Partly Sunny with a chance of rain showers. Waves 3 to 5 feet.
Tuesday night..West winds 15 to 20 knots increasing to 30 knots after midnight. Rain showers likely. Waves 3 to 5 feet.
Wednesday..Northwest winds 15 to 25 knots. Rain showers and a slight chance of Thunderstorms. A slight chance of waterspouts. Waves 4 to 6 feet.
Wednesday night..Northwest winds 15 to 20 knots. Partly cloudy with a chance of rain showers. A slight chance of waterspouts. Waves 4 to 6 feet.
Thursday..North winds 15 to 25 knots. Rain showers. Waves 3 to 5 feet.
Friday..North winds 10 to 20 knots. Mostly cloudy with a chance of rain showers. Waves 2 to 4 feet.
Saturday..Southwest winds 5 to 10 knots. Mostly cloudy. Waves 1 foot or less.
LMZ849 Expires:202009290900;;521529 FZUS53 KGRR 290205 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1005 PM EDT Mon Sep 28 2020 For waters within five nautical miles of shore on Lake Michigan LMZ849-290900-


7 Day Forecast for Marine Location Near Reed City, MI
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location: 43.93, -85.47     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 282327 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 727 PM EDT Mon Sep 28 2020

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 325 PM EDT Mon Sep 28 2020

-Cool and showery; occasional thunder risk

-Frost/freeze possible by week's end

DISCUSSION. (This evening through next Monday) Issued at 325 PM EDT Mon Sep 28 2020

-- Cool and showery; occasional thunder risk --

As a deep longwave trough continues to evolve/dig over the eastern U.S. this week, a series of sfc cold fronts will bring progressively colder air into the GrtLks Region. These features, augmented by lake effect/enhancement with delta Ts in the mid to upr teens and occasional shortwaves aloft, will bring periodic rain showers through the week.

Enough instability will be present at times this week for a risk of thunder, especially when stronger shortwaves are sliding through the region. Looks like that threat may exist for a time this evening over at least wrn portions of the area as convection over ern WI associated with a mid level wave heads this way.

Another decent opportunity for some thunder looks to exist on Wednesday and Thursday when lake induced capes rise to over 1000 J/KG per the NAM - with 500 mb temps colder than -25C . Low freezing levels around 5000 ft could lead to some small hail/graupel with any deeper cells, and soundings support the possibility of come cell tops up to 25K ft.

-- Frost/freeze possible by week's end --

The coldest air arrives later in the week, and sfc riding builds in from the west by Friday/Saturday. If/where skies clear and winds diminish at night, a frost and/or freeze scenario may set up. This could happen as early as Thursday night, but the highest potential at this time looks to be on Friday night.

AVIATION. (For the 00Z TAFS through 00Z Tuesday evening) Issued at 728 PM EDT Mon Sep 28 2020

VFR conditions expected to prevail through Tuesday afternoon with patchy MVFR and isolated IFR in heavier showers. The showers may increase a bit during the afternoon as the sun heats the ground and results in some instability. Winds will be west around 10 knots.

MARINE. Issued at 325 PM EDT Mon Sep 28 2020

Frequent Small Craft Advisory conditions will exist through the week as cold air pours over the Great Lakes. A series of sfc cold fronts/troughs swinging through will result in winds changing between southwest and northwest, but speeds will be averaging generally 15 to 25 kts with waves 4-7 feet.

The convection currently moving east from ern WI could have a waterspout threat with it this evening. There will also be a decent waterspout threat on Wednesday and Thursday when convective depth of 25K and delta T's near 15C place us in a favorable set up per the Szilagyi Waterspout Index.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . Small Craft Advisory until 8 PM EDT Wednesday for LMZ844>849.



SYNOPSIS . Meade DISCUSSION . Meade AVIATION . Ostuno MARINE . Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEEM4 - Manistee Harbor, MI 51 mi80 min WNW 17 G 19 57°F 1006.8 hPa
LDTM4 - 9087023 - Ludington, MI 51 mi60 min WNW 5.1 G 9.9 56°F 48°F
BSBM4 - Big Sable Point, MI 56 mi80 min WNW 15 G 18 56°F 1007.5 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Big Rapids, Roben-Hood Airport, MI15 mi65 minW 610.00 miPartly Cloudy52°F50°F94%1006.1 hPa

Link to 5 minute data for KRQB

Wind History from RQB (wind in knots)
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Last 24hrCalmW6NW4CalmCalmSW6S3CalmCalmSW8CalmSE3W6W3SW5SW6SW7SW5SW7SW7SW5W6W5W6
1 day agoSW8SW8
G23
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W7W6W6W7W8NW8NW4W4CalmS3
2 days agoCalmS5SW5CalmCalmCalmCalmCalmCalmCalmS5S9SW7S9SW6S9
G16
S10
G15
S9
G23
SW4S5S3S9S7S4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
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
Ground Weather Radar Station Gaylord, MI
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weather_mapweather_map weather_map


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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.