Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Grand Ledge, 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 6:06AMSunset 9:04PM Tuesday May 23, 2017 12:58 AM EDT (04:58 UTC) Moonrise 4:00AMMoonset 5:28PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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LMZ846 Holland To Grand Haven Mi- 1003 Pm Edt Mon May 22 2017
Rest of tonight..South winds 10 to 15 knots. Mostly cloudy with scattered light showers through about 2 am, then cloudy with isolated light showers overnight. Waves 2 to 3 feet.
Tuesday..Southwest winds around 10 knots. Cloudy with scattered light showers and isolated Thunderstorms. Waves 1 to 2 feet.
Tuesday night..Northeast winds 5 to 15 knots. Mostly cloudy in the evening then becoming cloudy. Scattered light showers. Waves 1 foot or less.
Wednesday..Northeast winds 15 to 20 knots. Cloudy with scattered light showers. Waves 1 to 2 feet.
LMZ846 Expires:201705230915;;055246 FZUS53 KGRR 230203 NSHGRR NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1003 PM EDT MON MAY 22 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ846-230915-

7 Day Forecast for Marine Location Near Grand Ledge, MI
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location: 42.75, -84.75     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 222337
afdgrr
area forecast discussion
national weather service grand rapids mi
737 pm edt Mon may 22 2017
latest update...

aviation

Synopsis
Issued at 328 pm edt Mon may 22 2017
an upper low over the great lakes will keep the chance of rain in
the forecast for the next few days. Wednesday night into Thursday
looks like the highest chance of rain and that's mainly south of i-
96. Temperatures will be near to slightly below normal this week.

Warmer weather is expected for the memorial day weekend.

Short term (this evening through Wednesday night)
issued at 328 pm edt Mon may 22 2017
forecast concerns deal with pcpn trends through the period. Regional
radar shows a decaying area of showers extending from southeast
wisconsin through northern missouri. This area of light rain was
moving east but struggling as it encountered drier air. We kept a
low chance of rain in the grids tonight, but we're not expecting
much.

A sfc low will move toward lake michigan Tuesday as the upper trough
edges closer to michigan. This will increase chances for rain
Tuesday afternoon . Li's fall below 0c Tuesday and models show 500-
1k j/kg MUCAPE so we added a slight chance for thunder too.

A deeper low is progd to move north toward the state Wednesday. This
is when we'll see the highest chance for showers/storms. The llj
increases during the day, but pwats remain fairly low. Thus heavy
rain isn't expected.

Long term (Thursday through Monday)
issued at 328 pm edt Mon may 22 2017
still some scattered showers expected on Thursday, especially east
of highway 131, with upper low lingering over the eastern great
lakes region. Would not even rule out a few isolated showers on
Friday but ridging is shown to be moving in, so probably a
predominately dry day.

At this time, Saturday looks to be the best day of the holiday
weekend. Sfc ridging should lead to light winds, and h8 temps near
12c suggest highs in the mid to upper 70s. Currently the guidance is
keeping the warm frontal related convection south of the state on
Saturday.

Precipitation potential appears to increase on Saturday night and
Sunday due to the approach of the next h5 trough/upr low from the
west/northwest. Ecmwf/gfs differ on handling of this feature over
the second half of the holiday weekend, with the ECMWF more
progressive, so confidence is low regarding precipitation
potential and coverage, and if/how much it cools off heading into
memorial day.

Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 737 pm edt Mon may 22 2017
vfr conditions will prevail much of the evening then showers will
move in from the west with ceilings lowering to 1500 to 2500 feet
overnight. The rain will prevail much of Tuesday although southern
lower michigan from azo to jxn should see mostlyVFR through
tonight and Tuesday. Winds will be southwest around 10 knots.

Marine
Issued at 328 pm edt Mon may 22 2017
we cancelled the small craft advisory a few hours early. Web cams
reveal little in the way of white caps and buoys are generally AOB 3
ft. This suggest that mixing is struggling over the water.

Hydrology
Issued at 125 pm edt Mon may 22 2017
river systems in southern lower michigan are running above normal,
while river levels in central lower michigan are around normal.

Tonight through Thursday, unsettled weather will bring up to an inch
of rain. This should keep levels elevated, but not expecting
flooding to result. The following forecast is based on observed and
forecast 24 hour precipitation.

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

Lm... None.

Synopsis... 04
short term... 04
long term... Meade
aviation... Ostuno
hydrology... 63
marine... 04


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 78 mi41 min S 12 G 14 55°F
MKGM4 - Muskegon, MI 90 mi29 min WSW 17 G 18 53°F 1011.8 hPa49°F
SBLM4 - Saginaw Bay Light #1, MI 91 mi59 min S 9.9 G 11 60°F 1011.5 hPa (-0.7)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lansing, Capital City Airport, MI8 mi66 minS 710.00 miFair61°F46°F58%1012.8 hPa
Charlotte, Fitch H Beach Airport, MI13 mi64 minSSW 710.00 miFair60°F48°F66%1012.5 hPa
Mason, Mason Jewett Field Airport, MI21 mi65 minS 310.00 miFair60°F49°F67%1013.2 hPa
Ionia County Airport, MI21 mi62 minSSW 710.00 miFair61°F47°F60%1012.2 hPa

Wind History from LAN (wind in knots)
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Last 24hrW17
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1 day ago4E6SE7SE9SE3E4SE5SE8SE8SE8S6S8S11W12SW9W16
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2 days agoNE7NE9NE7NE11E9NE7NE8E5E9E8
G17
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G21
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E12E13SE9SE9E6SE4

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
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (0,6,7,8)
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Ground Weather Radar Station Detroit, MI
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weather_mapweather_map weather_map

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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.