Friday, March22, 2019 L-36.com


Marine Weather and Tides
South Haven, 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 7:42AMSunset 7:59PM Friday March 22, 2019 8:31 PM EDT (00:31 UTC) Moonrise 9:08PMMoonset 8:00AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 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. Snow showers likely in the evening, then a slight chance of snow showers overnight. Heavy freezing spray through the night. Waves 3 to 5 feet subsiding to 2 to 3 feet toward daybreak.
Saturday..Southwest winds 10 to 20 knots. Mostly cloudy. Heavy freezing spray. Waves 2 to 3 feet.
Saturday night..West winds 15 to 25 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet.
Sunday..West winds 10 to 20 knots. Mostly cloudy with a slight 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.
LMZ844 Expires:201901260415;;919604 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 LMZ844-260415-


7 Day Forecast for Marine Location Near South Haven city, MI
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location: 42.4, -86.27     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 Fri mar 22 2019
latest update...

aviation

Synopsis
Issued at 301 pm edt Fri mar 22 2019
- quiet conditions are expected through the weekend, with Saturday
and Sunday featuring warmer temperatures and periods of sunshine
- a low chance for precipitation remains Sunday night into Monday
mainly along and south of i-96.

- a second stretch of quiet weather is expected during the middle
of next week.

Discussion (this evening through next Friday)
issued at 301 pm edt Fri mar 22 2019
it's a blustery Friday with northwesterly winds gusting to 30-35 mph
with temperatures in the mid to upper 30s. As low-level drier air
continues advecting into lower michigan after dark, clouds will
clear providing the means for temperatures to fall into the upper
teens to lower twenties overnight (save for the typical cold spots
overachieving). Should the low-levels manage to decouple (most
likely west of us-131 toward sunrise), even lower temperatures would
be achievable. Regardless, it'll be a chilly night so be sure to
bundle up if planning to head outdoors (especially if trying to get
a glimpse of the aurora boreas).

Saturday still looks great with sunny skies, highs in the upper 40s
(honestly lower 50s not out of question), and light westerly winds.

In fact, I would not be surprised to see a lake breeze develop
tomorrow afternoon thanks to help from a surface high pressure
system pushing southeast across northern illinois, with lakeshore
communities cooling off during the evening. Sunday will be slightly
warmer, but clouds will be on the increase as a well-advertised cold
front (surface wave) approaches from the north (southwest). At this
point, it appears that the brunt of precipitation overnight Sunday
and into Monday will stay south of lower michigan, with areas along
and south of i-96 seeing the best shot of seeing anything
measurable. Forecast thermal profiles suggest light rain will
change to a light wintry mix, with Monday morning commute perhaps
susceptibility to slowdowns as road temperatures fall toward the
freezing mark around sunrise (though this is not set in stone).

The system really doesn't appear to be too big of a deal.

Tuesday and Wednesday will feature a warming trend with mostly sunny
skies and light winds as upper-level ridging takes hold of the upper
midwest. Clouds and precipitation chances will increase Thursday and
beyond with considerable (but understandable) spread in both
deterministic and ensemble model guidance regarding a weekend
storm system.

Aviation (for the 00z tafs through 00z Saturday evening)
issued at 737 pm edt Fri mar 22 2019
confidence is very high thatVFR clear weather will continue
tonight and Saturday. Gusty northwest winds will subside to less
than 10 kts shortly after sunset. Winds on Saturday will be from
the west-southwest at only 5 to 10 kts.

Hydrology
Issued at 1218 pm edt Fri mar 22 2019
rivers in the grand and muskegon river basins remain high after rain
and snowmelt last week, but all sites have dropped below flood
stage. Standing water also continues to recede in newaygo county,
however some roads there and in kent county remain closed due to
high water. No flood warnings or advisories remain in effect.

River levels will continue to gradually fall through the next week
as only light precipitation occurs, and the snow that remains over
the muskegon basin undergoes a slow and steady melt as temperatures
warm back up.

The next chance for precipitation will be Sunday evening through
Monday morning. This should start as rain before mixing with and
changing to snow overnight. Total rain and melted snow equivalent
looks to remain below a tenth of an inch, and no impacts to river
levels or flooding are expected. A stronger low pressure system
looks to bring rain into the area again next weekend. Latest longer-
range models keep higher rain snow amounts north of the forecast
area, but will keep an eye on trends as there is plenty of time for
significant track shifts.

Grr watches warnings advisories
None.

Synopsis... Borchardt
discussion... Borchardt
aviation... Meade
hydrology... Hlo


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 1 mi31 min NNW 26 G 31 32°F
SJOM4 - St. Joseph, MI 24 mi31 min N 21 G 24 33°F 1023 hPa (+1.7)
HLNM4 - 9087031 - Holland, MI 26 mi37 min NNW 19 G 23 32°F 38°F1021.3 hPa26°F
MKGM4 - Muskegon, MI 57 mi21 min N 13 G 15 32°F 1023.9 hPa20°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 mi35 minN 12 G 2110.00 miFair32°F24°F74%1022.3 hPa
Southwest Michigan Regional Airport, MI20 mi38 minN 8 G 1610.00 miFair32°F24°F73%1023.2 hPa

Wind History from BEH (wind in knots)
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Last 24hrCalmS5S6SW5W10W10W10NW8NW7N7N7
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1 day agoSW3S3CalmCalmCalmSW4CalmCalmW4CalmN3CalmCalmN4N643N66NW743W4SW5
2 days agoS4S4SE4S4S5S4S4S5S7S8
G16
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S8S7S5S5S7S4

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 (20,4,5,8)
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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.