Monday, June25, 2018 L-36.com


Marine Weather and Tides
South Haven, MI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:05AMSunset 9:28PM Monday June 25, 2018 3:57 AM EDT (07:57 UTC) Moonrise 6:11PMMoonset 3:34AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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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LMZ844 St Joseph To South Haven Mi- 329 Am Edt Mon Jun 25 2018
Today..East winds 10 to 15 knots. Mostly Sunny. Waves around 1 foot.
Tonight..East winds 15 to 20 knots. Partly cloudy. A slight chance of rain showers overnight. Waves around 1 foot.
Tuesday..Southeast winds 10 to 20 knots. Mostly cloudy with a chance of showers and Thunderstorms. Waves around 1 foot.
Tuesday night..South winds 10 to 15 knots. Rain showers likely and a chance of Thunderstorms. Waves 1 to 3 feet.
LMZ844 Expires:201806251515;;078725 FZUS53 KGRR 250729 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 329 AM EDT Mon Jun 25 2018 For waters within five nautical miles of shore on Lake Michigan LMZ844-251515-

7 Day Forecast for Marine Location Near South Haven, MI
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location: 42.4, -86.27     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 250719
afdgrr
area forecast discussion
national weather service grand rapids mi
319 am edt Mon jun 25 2018
latest update...

synopsis short term long term marine

Synopsis
Issued at 238 am edt Mon jun 25 2018
a large area of high pressure will drop southward through ontario
today and then into new england on Tuesday. This system will
funnel a dry airmass into michigan today. An area of low
pressure is forecasted to track eastward through the great lakes
region Tuesday into Wednesday. Some showers and thunderstorms are
predicted to accompany the passage of this system.

Short term (today through Wednesday)
issued at 238 am edt Mon jun 25 2018
the weather will continue dry today as high pressure ridges down
from the north. The easterly flow in advance of this system will
result in the warmest temperatures today closer to the
lakeshore... Generally along and west of 131. Subsidence through a
deep layer will support plenty of sunshine.

The next mid level wave of low pressure is shown by the models to
track eastward through the state Tuesday into Wednesday. The trend
is for a slight delay in the potential for rainfall due to the the
dry easterly flow slowing down the arrival of the deeper moisture
plume. However favorable moisture... Instability and lift move in
ahead of this wave during the day on Tuesday. Thus I will feature
increasing pops through the day. The low level jet is shown to
track through Tuesday night. That combined with pwat values near
or above 1.75 inches will support a risk for some heavier rain.

Deep layer shear is lower than the previous model runs and the
system will be pulling through during the night... So the severe
risk looks a little lower at this time.

On Wednesday the low will be over lower michigan and pulling east
during the day. Thus a diminishing risk for showers and storms
will be forecasted.

Long term (Wednesday night through Sunday)
issued at 238 am edt Mon jun 25 2018
it will become increasingly hot and humid through most of the long
range forecast period as an upper level ridge amplifies over the
great lakes region late in the week into the weekend. Before that
occurs fair weather is forecast Wednesday night through Thursday as
a sfc ridge builds in. High temps by Thursday will already reach the
middle to perhaps upper 80's.

It will become hotter Friday and Saturday as the ridge builds and h8
temps moderate to around 22 to 24 c. This in conjunction with quite
a bit of Sun in subsidence under the upper ridge and persistent
south to SW flow warm air advection will yield high temps into the
lower 90's by Friday and lower to middle 90's by Saturday. Heat
indices by then will likely reach or exceed 100 degrees.

Hot weather could potentially continue into Sunday. However larger
medium range guidance discrepancies arise by Sunday into the
following week. The latest ECMWF continues to suggest that a low
pressure system moving in from the upper midwest could bring showers
and thunderstorms by Sunday. So we will include low pops for a
shower or storm Sunday.

Aviation (for the 00z tafs through 00z Monday evening)
issued at 1145 pm edt Sun jun 24 2018
vfr conditions are expected at all the terminals through Monday
evening. Some isolated pockets of patchy fog may develop early
Monday morning but potential for fog was too low to warrant
inclusion in any of the terminal fcsts at this time. Winds will be
out of the east to northeast at 5-10 kts through the next 24 hrs.

Marine
Issued at 238 am edt Mon jun 25 2018
the flow along the lakeshore will be mostly offshore the next
couple of days. This will support rather low wave heights. No
headlines are planned for the forecast period. Locally gusty winds
may accompany the storms later Tuesday or Tuesday night.

Hydrology
Issued at 328 pm edt Sun jun 24 2018
locally heavy rainfall Tuesday into Wednesday may lead to primarily
within bank rises on area rivers and streams, especially across
areas south of i-96 where more substantial rain has fallen this
month and antecedent conditions are more favorable for runoff. Areal
rain amounts of 0.50"-1.00" (locally higher) look likely with this
event for our region. Even with ncrfc 95th percentile rainfall (2"-
3"), no significant impacts are expected along mainstem rivers.

However, smaller rivers and streams with 95th percentile rainfall
could rise above banks primarily near south of i-96.

Grr watches warnings advisories
Mi... None.

Lm... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 1 mi28 min ENE 4.1 G 5.1 63°F
45168 3 mi28 min ENE 3.9 G 3.9 62°F 62°F1 ft1019.3 hPa58°F
SJOM4 - St. Joseph, MI 24 mi118 min Calm G 0 62°F 1018.6 hPa (+0.7)
HLNM4 - 9087031 - Holland, MI 26 mi46 min ENE 2.9 G 4.1 64°F 1018.8 hPa62°F
45026 - St. Joseph, MI 34 mi28 min W 5.8 G 5.8 61°F 61°F1 ft1019 hPa58°F
45029 35 mi28 min ENE 9.7 G 14 63°F 65°F1 ft1019.3 hPa59°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 44 mi68 min NNE 9.7 G 9.7 63°F 64°F1 ft1018.6 hPa (+0.4)61°F
MKGM4 - Muskegon, MI 57 mi28 min ESE 9.9 G 14 64°F 1019.4 hPa63°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Haven, South Haven Area Regional Airport, MI3 mi63 minN 010.00 miFair60°F58°F95%1019 hPa
Southwest Michigan Regional Airport, MI20 mi65 minN 03.00 miFog/Mist59°F57°F96%1018.6 hPa

Wind History from LWA (wind in knots)
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Last 24hrCalmCalmW3CalmW3W6NW6W6NW6NW6NW5NW9NW7N5N4W3W6CalmCalmCalmCalmN3CalmCalm
1 day agoCalmCalmCalmCalmN3CalmN4NW5W6W5W8W10NW7W7NW5W3CalmW3CalmCalmSW3W4CalmCalm
2 days agoNE6E6E5E4E5SE3NE5E6NE7NE5CalmCalmNE7NE6E5E3E5E3NE7NE4NE3NE3N3Calm

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (3,6,7,8)
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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.