Thursday, August22, 2019 L-36.com


Marine Weather and Tides
Grand Haven, MI

Version 3.4
NOTICE
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 6:56AMSunset 8:39PM Thursday August 22, 2019 2:15 PM EDT (18:15 UTC) Moonrise 11:17PMMoonset 12:44PM Illumination 54% Phase: Third Quarter Moon; Moon at 22 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- 1105 Am Edt Thu Aug 22 2019
Rest of today..North winds around 10 knots. Mostly Sunny. Waves 1 to 3 feet.
Tonight..Northeast winds 10 to 15 knots. Mostly clear. Waves 1 to 3 feet.
Friday..Northeast winds 10 to 15 knots backing north late in the day. Sunny. Waves 1 to 2 feet.
Friday night..North winds around 10 knots veering east after midnight. Mostly clear. Waves 1 to 2 feet.
Saturday..East winds 10 to 15 knots. Sunny. Waves 1 foot or less.
Sunday..Southeast winds 10 to 15 knots. Mostly Sunny. Waves around 1 foot.
Monday..South winds 15 to 20 knots. Partly Sunny with a chance of rain showers. Waves 1 to 3 feet building to 2 to 4 feet.
LMZ846 Expires:201908222100;;037764 FZUS53 KGRR 221506 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1105 AM EDT Thu Aug 22 2019 For waters within five nautical miles of shore on Lake Michigan LMZ846-222100-


7 Day Forecast for Marine Location Near Grand Haven, MI
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location: 43.05, -86.36     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 221734
afdgrr
area forecast discussion
national weather service grand rapids mi
134 pm edt Thu aug 22 2019
latest update...

aviation

Synopsis
Issued at 310 am edt Thu aug 22 2019
- cooler and much less humid weather through the weekend
- next chance for rain early next week

Update
Issued at 1131 am edt Thu aug 22 2019
based on the observed soundings from dtx and apx it looks like
there will be more diurnal CU today than forecasted. Temperatures
will reach the convective temperature for the day leading to the
increased cu. The airmass has some extra moisture from the lakes
given the cooler airmass in place. This should impact high
temperatures as well... So we nudged them down slightly. Friday
looks like a similar setup so we may some changes there as well.

Discussion (today through next Wednesday)
issued at 310 am edt Thu aug 22 2019
forecast concerns are minimal as canadian high pressure will
gradually build in from the northwest and result in cooler and
much less humid wx late this week through the weekend. We expect
a bkn fair wx CU deck to develop mid to late morning through the
afternoon and again on Friday.

It is not completely impossible that couple of shortwaves
dropping in from the NW could touch off development of an isolated
shower or sprinkle. Overall though a consensus of latest high res
guidance suggests that dry wx will prevail the next couple of days
and this seems reasonable due to the dry airmass that will be
in place.

Much more in terms of Sun is forecast this wknd in subsidence
under the high pressure ridge that will be overhead by then.

Southerly winds will begin to ramp up Sunday night on the back
side of the departing ridge and out ahead of the low pressure
system over the central northern plains states. That system will
move in from the west and bring the next chance for rain late
Monday into Tuesday.

Aviation (for the 18z tafs through 18z Friday afternoon)
issued at 130 pm edt Thu aug 22 2019
generally looking atVFR weather through the period. Some broken
clouds are likely this afternoon... But bases are forecasted to
remain above 3000 ft. Winds may be variable at the surface from
northwest to northeast... But should be northerly most of the time.

Marine
Issued at 310 am edt Thu aug 22 2019
high pressure will result in rather minimal wind speeds and wave
heights late this week into the weekend. Winds will increase a bit
late Sunday into Monday on the back side of the departing high
pressure ridge and as a low pressure system approaches the great
lakes region.

Grr watches warnings advisories
Mi... None.

Lm... None.

Update... Mjs
synopsis... Laurens
discussion... Laurens
aviation... Mjs
marine... Laurens


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45161 9 mi75 min 5.8 G 7.8 69°F 73°F1 ft1017.6 hPa (+0.3)
45029 11 mi15 min WNW 3.9 G 5.8 69°F 74°F1 ft1017.2 hPa (+0.0)51°F
MKGM4 - Muskegon, MI 12 mi25 min NNW 12 G 13 71°F 1017.2 hPa57°F
HLNM4 - 9087031 - Holland, MI 21 mi51 min NNW 6 G 8 71°F 1016.8 hPa50°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 44 mi25 min NE 9.7 G 14 68°F 74°F3 ft1018.1 hPa53°F
45168 45 mi15 min NNW 7.8 G 9.7 71°F 75°F1 ft1017 hPa (+0.3)53°F
SVNM4 - South Haven, MI 45 mi35 min N 9.9 G 15 73°F
LDTM4 - 9087023 - Ludington, MI 62 mi51 min N 5.1 G 13 69°F 51°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI10 mi20 minNNW 710.00 miMostly Cloudy78°F46°F32%1017.1 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrNW7W7NW9
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NW6N9N8N6NE3N4SW3CalmN5NE8NE7NE7NE7NE7NE6NE5NE9NE7NE74NW7
1 day agoS9SW8SW12SW11
G17
SW6NW3N3N4N4S4SW6CalmSW4SW3SW4SW3SE3CalmW5W8W7W6W9W8
2 days agoSW9SW8SW7SW8SW4NW3CalmCalmSE3NE3SE3CalmCalmE3NE3CalmE5E8E6E8E9SE6S5S6

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    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 (14,3,4,5)
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Ground Weather Radar Station Grand Rapids/Muskegon, 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.