Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Douglas, 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 6:59AMSunset 8:34PM Saturday August 24, 2019 3:48 PM EDT (19:48 UTC) Moonrise 12:00AMMoonset 2:51PM Illumination 32% Phase: Waning Crescent; Moon at 24 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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LMZ845 South Haven To Holland Mi- 1105 Am Edt Sat Aug 24 2019
Rest of today..East winds 10 to 15 knots. Sunny. Waves 1 foot or less.
Tonight..East winds 10 to 15 knots. Mostly clear. Waves 1 foot or less.
Sunday..East winds 10 to 15 knots. Sunny. Waves 1 foot or less.
Sunday night..Southeast winds 10 to 15 knots. Partly cloudy with a slight chance of rain showers. Waves 1 foot or less.
Monday..South winds 10 to 20 knots. Mostly cloudy with a chance of rain showers and a slight chance of Thunderstorms. Waves 1 to 2 feet.
Tuesday..West winds 10 to 20 knots. Mostly Sunny with a chance of rain showers. Waves 2 to 4 feet.
Wednesday..West winds 15 to 20 knots. Sunny. Waves 2 to 4 feet.
LMZ845 Expires:201908242100;;138513 FZUS53 KGRR 241506 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1105 AM EDT Sat Aug 24 2019 For waters within five nautical miles of shore on Lake Michigan LMZ845-242100-


7 Day Forecast for Marine Location Near Douglas, MI
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location: 42.64, -86.21     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 241856
afdgrr
area forecast discussion
national weather service grand rapids mi
256 pm edt Sat aug 24 2019
latest update...

synopsis discussion marine

Synopsis
Issued at 256 pm edt Sat aug 24 2019
- continued mild and dry through Sunday night
- rain chances gradually increase Monday, with the best chance
Monday night
- a couple of rain chances Wednesday and Thursday night with cool
conditions holding on

Discussion (this evening through next Saturday)
issued at 256 pm edt Sat aug 24 2019
not much to focus on until Monday with high pressure at the sfc and
aloft holding on over the area. Dry feed of air from the E NE will
continue to allow for low humidity values and mild temperatures
through Sunday night.

We are still expecting rain chances to slowly increase on Monday,
and peaking Monday night and early Tuesday. The wave that will be
driven in toward the NE by the larger scale trough to our west will
bring the rain chances during the daylight hours on Monday. There
has been a slight trend for this wave to go a little further east,
and focusing on the SE half of the area. There looks to be a break
in the activity Monday evening, before the main front moves through
Monday night.

There looks to be around 1,000 j kg of mu CAPE ahead of the front
Monday night. This should be plenty for storms to remain possible
through the night. Fortunately, they will come through during the
night, and instability looks to be elevated in nature. This should
limit the severe threat quite a bit. A bigger threat will be heavy
downpours with precipitable water values approaching 2 inches.

Widespread flooding is not expected with this system relatively
progressive in nature. There will be some lingering showers Tuesday
morning, before the front clears the area, and clouds and rain clear
out toward afternoon.

The next noteworthy system will wait until Thursday night to move
through. However, we will be under the influence of general
troughing until then. The models have trended a little south with
clouds and instability showers for Wed into thu. So we have small
chances in for that period. The front has better consensus amongst
the models that bring rain through mostly on Thursday night.

We should clear out once again after the Thursday night front, but
will be watching how far south the front goes. There are indications
that a wave will ride along the front, and a band of rain will move
through just north of the front.

Aviation (for the 18z tafs through 18z Sunday afternoon)
issued at 117 pm edt Sat aug 24 2019
we expectVFR conditions to rule through the 24 hour forecast
period and beyond. Little to no impacts are once again expected.

Some cumulus cloud development is ongoing this afternoon,
especially to the east where moisture from lake huron is helping
the cause a bit. Klan and kjxn may go bkn briefly, but will remain
vfr. Elsewhere, few-sct cumulus clouds around 4500 ft are
expected. These clouds will dissipate toward sunset, and redevelop
Sunday toward 16z or so.

We have kept the forecast simple with one liners, since winds will
only vary by only a few knots, and sky conditions will stayVFR
with bkn-ovc only isolated in nature to the east this afternoon.

Marine
Issued at 256 pm edt Sat aug 24 2019
we continue to expect that winds will be on the increase on Sunday
as the pressure gradient tightens up a bit as high pressure moves
east. Waves will build a little, but should not build too much with
an offshore component to the wind.

Winds will then remain up for the most part through the first part
of Tuesday with the passage of the system Monday night. It looks
likely that at least a small craft advisory will be needed for that
time frame. Winds should then slacken a bit for later Tuesday,
before they come back up by Wednesday.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Njj
discussion... Njj
aviation... Njj
marine... Njj


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 9 mi54 min ENE 5.1 G 16 72°F 1024.3 hPa50°F
SVNM4 - South Haven, MI 17 mi48 min ENE 7 G 9.9 71°F
45029 18 mi18 min E 5.8 G 9.7 70°F 68°F1 ft1024.5 hPa51°F
45168 18 mi18 min NE 3.9 G 5.8 69°F 65°F1 ft1024.4 hPa51°F
45161 38 mi48 min ESE 5.8 G 9.7 70°F 69°F1 ft1025 hPa (-1.5)
SJOM4 - St. Joseph, MI 40 mi48 min WSW 2.9 G 7 74°F 1025.1 hPa (-1.7)
MKGM4 - Muskegon, MI 41 mi38 min E 5.1 G 8.9 74°F 1024.9 hPa50°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 43 mi28 min ENE 7.8 G 9.7 68°F 73°F1025.5 hPa52°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI10 mi55 minENE 8 G 1610.00 miA Few Clouds75°F53°F46%1025.3 hPa
South Haven, South Haven Area Regional Airport, MI20 mi53 minE 810.00 miFair74°F49°F43%1025.1 hPa

Link to 5 minute data for KBIV

Wind History from BIV (wind in knots)
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Last 24hr5NW8NW6--N8NE3Calm--------CalmE3E3E3E3E3E5E7E12E11
G20
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1 day agoCalmN8
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--5------NE3------CalmCalm4E4--NE5NE7E5NE4NW7NW11
2 days ago--W6W6N6N5CalmN4--CalmCalm--Calm5--NE4NE33E8E10
G15
--E84N75

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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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 (15,3,4,5)
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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.