Monday, March25, 2019 L-36.com


Marine Weather and Tides
Grand Ledge, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:31AMSunset 7:57PM Monday March 25, 2019 5:56 PM EDT (21:56 UTC) Moonrise 12:00AMMoonset 9:34AM Illumination 76% Phase: Waning Gibbous; Moon at 20 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- 412 Pm Est Fri Jan 25 2019
.heavy freezing spray warning in effect through Saturday morning...
.small craft advisory in effect through Saturday afternoon...
Tonight..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet.
Saturday..Southwest winds 10 to 20 knots. Mostly cloudy with a slight chance of snow showers. Freezing spray. Waves 2 to 3 feet.
Saturday night..West winds 20 to 25 knots. Snow showers likely in the evening, then a chance of snow showers overnight. Heavy freezing spray through the night. Waves 3 to 5 feet.
Sunday..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet. This is the last nearshore marine forecast (nshgrr) issuance for the season. The nshgrr will again be issued around april 1st 2019, or as conditions warrant.
LMZ846 Expires:201901260415;;919602 FZUS53 KGRR 252113 CCA NSHGRR Nearshore Marine Forecast...corrected National Weather Service Grand Rapids MI 412 PM EST Fri Jan 25 2019 For waters within five nautical miles of shore on Lake Michigan LMZ846-260415-


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 251900
afdgrr
area forecast discussion
national weather service grand rapids mi
300 pm edt Mon mar 25 2019
latest update...

synopsis discussion

Synopsis
Issued at 300 pm edt Mon mar 25 2019
- fair weather through midweek
- moderating temperatures Wednesday and Thursday
- low pressure system will bring potential for a wintry mix of
precipitation late Friday into Saturday

Discussion (this evening through next Monday)
issued at 300 pm edt Mon mar 25 2019
high pressure is building in from the northwest this afternoon and
will result in clear skies for the rest of today through tonight
and Tuesday. Excellent radiational cooling conditions will allow
for min temps in the teens tonight. A large diurnal temp swing
will occur as high temps Tuesday will reach well into the 40s with
full Sun and a dry airmass still in place.

Temperatures will undergo a significant moderating trend Wednesday
into Thursday as winds become southerly. Clouds will thicken and
some light warm air advection rain showers are expected by
Wednesday night through Thursday.

A nearly stationary west to east oriented frontal boundary will
likely focus development of steadier pcpn by late Friday through
Friday night. The main low pressure system will then also move
east and potentially bring heavier pcpn late Friday night into
Saturday.

At this time it appears that thermal profiles should cool
sufficiently enough for rain to become mixed then changeover to
wet snow over portions of our fcst area. Snow is most probable
for our far northern fcst area where overall fcst thermal profiles
will be a little cooler. It is noted that operational 12z ecmwf
has trended further north and keeps snow well north of the
kgrr klan areas while latest GFS guidance still looks a little
cooler.

Aviation (for the 18z tafs through 18z Tuesday afternoon)
issued at 1145 am edt Mon mar 25 2019
vfr conditions will continue at all the terminals through the next
24 hours with clear skies. NE winds will gust to at least 15 kts
this afternoon before subsiding this evening. Winds speeds tonight
through 18z Tue will be AOB 10 kts.

Hydrology
Issued at 1042 am edt Mon mar 25 2019
rivers across most of southwest lower michigan are back within their
banks, except for a few sites on the grand and muskegon rivers.

Standing water has also receded across the area with a few roads
remaining closed in newaygo and kent counties. No flood warnings or
advisories remain in effect.

River levels will continue to gradually fall through the next week
as only light precipitation is expected. The snow that remains over
the muskegon basin will undergo a slow and steady melt as
temperatures warm up.

Grr watches warnings advisories
None.

Synopsis... Laurens
discussion... Laurens
aviation... Laurens
hydrology... 63


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 78 mi63 min 33°F 37°F1024.7 hPa25°F
MKGM4 - Muskegon, MI 90 mi37 min N 18 G 23 36°F 1027 hPa24°F
SBLM4 - Saginaw Bay Light #1, MI 91 mi57 min ESE 5.1 G 6 30°F 1024.4 hPa (-1.0)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI8 mi64 minNNW 810.00 miFair43°F14°F31%1025.2 hPa
Charlotte, Fitch H Beach Airport, MI13 mi61 minN 810.00 miFair43°F14°F31%1023.7 hPa
Mason, Mason Jewett Field Airport, MI21 mi61 minN 9 G 1410.00 miFair43°F11°F27%1023.7 hPa
Ionia County Airport, MI21 mi61 minN 710.00 miFair43°F0°F16%1024 hPa

Wind History from LAN (wind in knots)
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Last 24hrW11W10W7NW5NE12NE13NE14NE12NE12NE8NE7NE7N7NE9NE11NE10NE13NE11NE11N9N9N8N8
G14
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1 day agoW11W8W7W5CalmSW5CalmCalmSW4SW4SW5SW7SW6SW5SW5SW4SW6SW8W8SW7SW10W8W8SW11
2 days agoNW15
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NW11NW9NW7NW6NW8N6N6NW4NW3NW5W4NW4NW5NW5NW4NW745W83
G17
3W8

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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wmap_A
GOES Local Image of GreatLakes    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 (17,4,5,8)
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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.