Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Saugatuck, MI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:28AMSunset 8:09PM Wednesday March 29, 2017 11:14 AM EDT (15:14 UTC) Moonrise 7:44AMMoonset 9:13PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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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LMZ874 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 901 Am Cdt Wed Mar 29 2017 Sheboygan Wi To Pentwater Mi South...
Rest of today..East winds 10 to 20 kt becoming northeast 15 to 25 kt. Areas of fog this morning. Waves 2 to 4 ft building to 3 to 5 ft occasionally to 7 ft.
Tonight..Northeast winds 15 to 25 kt becoming east to 30 kt. A few gale force gusts to 35 kt possible after midnight. Chance of rain in the evening...then rain likely overnight. Waves 3 to 5 ft occasionally to 7 ft building to 6 to 9 ft occasionally to 11 ft.
Thursday..East winds to 30 kt. A few gale force gusts to 35 kt in the morning. Rain. Waves 7 to 10 ft occasionally to 13 ft.
Thursday night..East winds to 30 kt becoming northeast 15 to 25 kt. Rain likely in the evening...then chance of rain overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Friday..Northeast winds to 30 kt becoming north. Chance of rain. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
Friday night..North winds to 30 kt diminishing to 10 to 20 kt overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Saturday..North winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft occasionally to 7 ft subsiding to 2 to 4 ft.
Sunday..East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 ft or less.
LMZ874 Expires:201703292130;;262847 FZUS63 KLOT 291401 GLFLM OPEN LAKE FORECAST FOR LAKE MICHIGAN NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 901 AM CDT WED MAR 29 2017 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN. WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED. .SYNOPSIS...HIGH PRESSURE OF 30.5 INCHES IS OVER HUDSON BAY WITH RIDGING EXTENDING INTO THE CENTRAL GREAT LAKES WHICH WILL SHIFT TO THE EASTERN LAKES TONIGHT. A 29.7 INCH LOW IS OVER OKLAHOMA EARLY THIS MORNING AND WILL LIFT TO NORTHERN MISSOURI THURSDAY THEN TO LAKE ERIE ON FRIDAY. A RIDGE AVERAGING 30.2 INCHES WILL BUILD ACROSS THE CANADIAN PRAIRIES AND UPPER MIDWEST SATURDAY AND WILL SHIFT TO THE CENTRAL GREAT LAKES ON SUNDAY. ANOTHER LOW OF 29.6 INCHES WILL LIFT FROM ARKANSAS MONDAY TO LAKE ERIE ON TUESDAY. LMZ080-669-671-673-675-777-779-870-872-874-876-878-292130-

7 Day Forecast for Marine Location Near Saugatuck, MI
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location: 42.84, -86.63     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 291141
afdgrr
area forecast discussion
national weather service grand rapids mi
741 am edt Wed mar 29 2017
latest update...

aviation

Synopsis
Issued at 309 am edt Wed mar 29 2017
a ridge of high pressure will track eastward through michigan
today. This fair weather system will provide the region with dry
weather. Clouds will thicken up during the day as a low pressure
system approaches from the southwest. This system will spread a
mixture of precipitation types to the area late tonight... That
will transition to all rain during the day on Thursday. The wet
and cool weather will then persist into Friday.

Short term (today through Friday)
issued at 309 am edt Wed mar 29 2017
the main challenge in the short term deals with the potential
impacts for later tonight through Thursday. Overall it appears
parts of interior lower michigan could see some impacts mainly
from wet snow.

We are going to have to monitor this system carefully and may have
to make bigger adjustments to the forecast with time. The cooling
and drying airmass that we currently have in place is lowering the
wet bulb temperatures down ahead of the approaching storm system.

This will act to create more of a snow sounding when the steadier
precipitation moves in later tonight. Fgen strengthens
overhead... With favorable upper jet setup suggests the
precipitation could organize into a band... Especially after
midnight or Thursday morning. Up high... Weakness in the stability
could support a period of higher snow rates. Currently the
northern row or two of zones in my CWA look to be at the greatest
risk with the main window from 09z to 18z. This would include the
area along and north of a mount pleasant to big rapids line. Still
some uncertainty as mixed precipitation could occur and low level
temperatures may struggle to fall below freezing possibly
limiting impacts. We will continue to highlight the potential in
the hazardous weather outlook and social media.

Low level wet bulb temperatures are still not far from snow going
into Thu evening. If this system trends a little colder... Snow
could persist even into Thu afternoon and evening. Stay tuned.

Long term (Friday night through Tuesday)
issued at 309 am edt Wed mar 29 2017
there may be a few lingering showers Friday night as low pressure
moves east across northern ohio, otherwise the weekend looks dry with
highs in the 50s as high pressure builds in behind the departing low.

The next chance for measurable rain comes late Monday and Monday
night as low pressure moves from the plains east across the ohio
valley. Most of the precipitation associated with this system will
stay south of michigan. However, the southern CWA will see the
highest chances for light rain. Highs Monday and Tuesday will be in
the 50s.

Aviation (for the 12z tafs through 12z Thursday morning)
issued at 738 am edt Wed mar 29 2017
patchy fog this am will quickly dissipate given the dry airmass in
place. High clouds will thicken up during the day with the bases
lowering into the evening... But still remainingVFR. Then after
midnight precipitation will be developing and moving in. It looks
like a mixture of rain and snow will be possible for kgrr and
kmkg... With mainly rain elsewhere. For now I put MVFR conditions
in the forecast for later tonight.

Marine
Issued at 309 am edt Wed mar 29 2017
with a largely offshore wind... No marine headlines are expected
today to tonight.

Hydrology
Issued at 320 pm edt Mon mar 27 2017
most rivers have demonstrated within bank rises after rainfall over
the last 4 days. However, more elevated river levels at ionia,
hastings, eagle, and holt may be susceptible to additional rainfall
expected Thursday and Friday, possibly another 0.50"-1.00". This may
act to provide secondary river crests heading into the end of the
week and weekend, potentially higher than the current crests.

Grr watches/warnings/advisories
Mi... None.

Lm... None.

Synopsis... Mjs
short term... Mjs
long term... 04
aviation... Mjs
hydrology... Hoving
marine... Mjs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 23 mi44 min NE 8 G 9.9
MKGM4 - Muskegon, MI 31 mi24 min E 5.1 G 7 45°F 1026.7 hPa33°F
SVNM4 - South Haven, MI 35 mi34 min ENE 7 G 9.9 42°F
SJOM4 - St. Joseph, MI 52 mi74 min E 2.9 G 6 44°F 1025.1 hPa (+1.4)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI29 mi21 minE 910.00 miFair46°F35°F66%1026 hPa

Wind History from BIV (wind in knots)
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Last 24hrNE53E5E9NE6W5W5NW7W4W3W3W3SW4CalmCalmCalmCalmCalmCalmE3E3NE4E8E9
1 day agoW5N4W4W6W5W5NW7NW6NW5N5N3CalmN4N3N5N4N4N5N4N6N5N7N7N6
2 days agoE9E9E6SE6SE5SE4SE4SE3CalmS3SE3SW4W7SW6W5W4W6W8W6NW3W3W6W4NW4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (11,2,3,4)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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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 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.