Friday, December13, 2019
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Marine Weather and Tides
Hart, MI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 8:06AMSunset 5:11PM Friday December 13, 2019 10:09 PM EST (03:09 UTC) Moonrise 6:41PMMoonset 9:31AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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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LMZ848 Whitehall To Pentwater Mi- 405 Pm Est Fri Dec 13 2019
Through early evening..West winds 5 to 10 knots. Cloudy. Waves 1 to 3 feet.
Tonight..Northwest winds 5 to 10 knots veering north after midnight. Cloudy. Waves 1 to 2 feet.
Saturday..Northwest winds 10 to 20 knots. Cloudy with a chance of rain showers, snow showers and freezing rain. Waves 2 to 3 feet building to 3 to 5 feet late in the day.
Saturday night..Northwest winds 15 to 25 knots. Snow showers likely and a chance of freezing rain. Waves 5 to 7 feet.
Sunday..Northwest winds 10 to 20 knots. Mostly cloudy. Waves 4 to 6 feet subsiding to 1 to 3 feet late in the day.
Sunday night..West winds 5 to 10 knots backing southwest late at night, then backing southeast toward daybreak. Mostly cloudy. Waves around 1 foot.
Monday..East winds 5 to 10 knots backing north 10 to 15 knots late in the day. Mostly cloudy with a chance of snow showers. Waves 1 foot or less.
Tuesday..Northwest winds 15 to 25 knots. Mostly cloudy. Waves 4 to 6 feet.
Wednesday..West winds 10 to 20 knots. Mostly cloudy. Waves 3 to 5 feet.
LMZ848 Expires:201912140900;;736066 FZUS53 KGRR 132106 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EST Fri Dec 13 2019 For waters within five nautical miles of shore on Lake Michigan LMZ848-140900-


7 Day Forecast for Marine Location Near Hart, MI
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location: 43.66, -86.53     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 140012 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 707 PM EST Fri Dec 13 2019

LATEST UPDATE . Aviation . Hydro

SYNOPSIS. Issued at 155 PM EST Fri Dec 13 2019

* Some fog possible tonight

* Drizzle and freezing drizzle possible on Saturday

* Wintry mix may lead to slick spots on roads Saturday afternoon through Sunday morning

* Light snow possible early next week

DISCUSSION. (This evening through next Friday) Issued at 155 PM EST Fri Dec 13 2019

The main challenges over the forecast period deals with the potential for impacts.

Tonight there could some fog around the area. Temperatures will be near freezing. Thus a risk for a few icy spots exists. One limiting factor will be the cloud cover from the wave of low pressure lifting up the Appalachians. That shield of clouds will exist over much of the CWA for at least part of the night.

On Saturday and more so into Saturday night . light precipitation will be around. Temperatures during the day are forecasted to rise above freezing . thus little or no impact is projected during the day. As we go through the late afternoon hours into the the evening . the temperatures are likely to fall below freezing. Mid level height falls occur as a trough digs down. Lake moisture could feed into this system as it tracks through the Great Lakes Region. Initially the DGZ looks unsaturated later Saturday afternoon into the the first half of the night. Then it is forecasted to become barely saturated. All this points to a risk for a variety of light wintry precipitation types. Given the potential for below freezing temperatures we could see some impacts.

For Monday into Tuesday . guidance continues to track an area of low pressure up the Ohio Valley. Southern parts of the CWA from Kalamazoo to near Jackson are shown to be on the northwest fringes of the snow shield. Most model solutions keep the axis of heavier snow across Indiana and Ohio. We will feature relatively high POPs for southern parts of the CWA with light accumulations. We will need to monitor the system closely as a northward shift in the track could put more snow into our region. Following the passage of this storm system . a temporary surge of arctic air moves in. This will increase the lake effect snow which could lead to some travel impacts for the area along and west of a Big Rapids to Battle Creek line.

AVIATION. (For the 00Z TAFS through 00Z Saturday evening) Issued at 707 PM EST Fri Dec 13 2019

Expect VFR conditions to continue this evening then areas of MVFR and IFR may develop late tonight as low stratus moves in. The low clouds will persist through much of Saturday and some icing is possible in the cloud layer along with flurries or drizzle at times in the afternoon.

MARINE. Issued at 155 PM EST Fri Dec 13 2019

The pressure gradient will remain relatively weak through tonight which will act to keep the wave heights low. Then Saturday and more so Saturday night a northwest wind will develop and strengthen. We may need marine headlines to account for the wind and wave action. The potential for hazardous condition may exist into Sunday.

Another storm system early next week will be followed by the arrival of another arctic airmass. Hazardous weather conditions will likely persist/redevelop.

HYDRO. Issued at 711 PM EST Fri Dec 13 2019

River levels across most of West Michigan remain significantly higher than normal for this time of year, but are slowly trending down. The Maple River at Maple Rapids is still hovering around bankfull, but is following the trend of the other rivers with a slow drop.

Of note, a small freezeup ice jam on the Muskegon River between Big Rapids and Rogers Dam continues to cause minor flooding to several streets and a few homes in the area. Limited reports suggest water levels have been mostly steady today. Water levels around ice jams are wildly unpredictable, so some fluctuations both up and down can be expected over the next few days, but the overall trend should be slowly downward as warmer temperatures are limiting the growth of new ice that can come down the river and reinforce the ice jam.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . None.

SYNOPSIS . MJS DISCUSSION . MJS AVIATION . Ostuno MARINE . MJS HYDRO . AMD


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDTM4 - 9087023 - Ludington, MI 20 mi64 min NNE 1 G 1.9 33°F 29°F
BSBM4 - Big Sable Point, MI 27 mi90 min NW 2.9 G 6 33°F 1011.2 hPa
MKGM4 - Muskegon, MI 32 mi30 min Calm G 0 33°F 1011.3 hPa31°F
MEEM4 - Manistee Harbor, MI 42 mi30 min W 4.1 G 6 34°F 1011.5 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ludington, Mason County Airport, MI22 mi75 minN 07.00 miOvercast33°F30°F92%1010.2 hPa

Link to 5 minute data for KLDM

Wind History from LDM (wind in knots)
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SW9SW7SW5SW6CalmN3N3CalmCalmCalmCalmCalmNW4NW3CalmN4CalmCalm
1 day agoW4W3SW7S3CalmSE5SE3SE4SE7SE9SE8
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2 days agoW10
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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
Wind Forecast for Grand Rapids, MI (22,6,7,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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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 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.