Monday, April22, 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 6:50AMSunset 8:35PM Monday April 22, 2019 10:17 AM EDT (14:17 UTC) Moonrise 11:20PMMoonset 8:12AM Illumination 90% Phase: Waning Gibbous; Moon at 18 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- 405 Am Edt Mon Apr 22 2019
.small craft advisory in effect from late tonight through Tuesday evening...
Early this morning..South winds 10 to 15 knots. Partly cloudy. Waves 1 foot or less.
Today..South winds 15 to 20 knots. Mostly Sunny. Waves 1 to 3 feet.
Tonight..South winds 15 to 20 knots veering southwest toward daybreak. Partly cloudy in the evening then becoming mostly cloudy. A chance of showers and Thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet after midnight.
Tuesday..Northwest winds 10 to 20 knots. Cloudy with a chance of rain showers until midday, then mostly Sunny in the afternoon. Waves 3 to 5 feet.
Tuesday night..Northwest winds 5 to 15 knots. Mostly clear. Waves 2 to 4 feet.
Wednesday..West winds 5 to 10 knots backing southwest late in the day. Sunny. Waves around 1 foot.
Thursday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Friday..North winds 10 to 15 knots. Sunny. Waves around 1 foot.
LMZ844 Expires:201904222000;;304113 FZUS53 KGRR 220806 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 AM EDT Mon Apr 22 2019 For waters within five nautical miles of shore on Lake Michigan LMZ844-222000-


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 221137
afdgrr
area forecast discussion
national weather service grand rapids mi
737 am edt Mon apr 22 2019
latest update...

aviation

Synopsis
Issued at 322 am edt Mon apr 22 2019
- partly sunny and warm today - highs near 80.

- showers likely tonight, perhaps a thunderstorm.

- much cooler Tuesday - highs in the mid 50s.

- chance of light rain Thursday.

Discussion (today through next Sunday)
issued at 322 am edt Mon apr 22 2019
today will be warm and breezy. South flow will strengthen over the
ohio valley in response to a developing plains low. This will push
temperatures close to 80 this afternoon. The low will move northeast
across northern lower tonight and showers are expected to develop
along the front. There is some instability ahead of the front,
especially over wisconsin this afternoon where li's near -5c are
expected. A few storms west of the lake could be strong. Elevated
li's near -4c are progd at 06z over the CWA and shear values near
40s kts suggest the potential for a few stronger storms over the cwa
too.

Another weaker front will push south across lower Thursday and we
may see a shower with that too, but moisture will be limited.

Next weekend looks like it could be cool and wet as low pressure
moves across the state. Highs in the 50s are expected next weekend.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 737 am edt Mon apr 22 2019
solidVFR conditions are expected till near midnight (04z) at
which time an area of thunderstorms from wi should have reached
southwest mi TAF sties. Even so,for the most part these storms
should be near and north of mkg. Expect some low clouds near the
frontal system toward 09z (ish).

It will be breezy today with 15 to 25 knot winds. Tonight expect
low level wind shear around 2000 ft in the 40 to 45 knot range.

Marine
Issued at 322 am edt Mon apr 22 2019
after the cold front moves around midnight, winds will increase and
waves will build. As a result, we have issued a small craft advisory
from 2 am through 8 pm Tuesday.

Fire weather
Issued at 322 am edt Mon apr 22 2019
warm and breezy conditions will create a higher fire danger today
than yesterday. Most locations will be in the very high fire danger
for conifer fuels today. Highs near 80 and south winds gusting to
near 25 mph will create hazardous conditions. Min rh values will be
in the upper 20s this afternoon and a rfw headline may be needed,
but will be determined after consult with nfs later this morning.

Grr watches warnings advisories
Mi... None.

Lm... Small craft advisory from 2 am to 8 pm edt Tuesday for
lmz844>849.

Synopsis... 04
discussion... 04
aviation... Wdm
fire weather... 04
marine... 04


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 1 mi17 min SE 12 G 15 64°F
SJOM4 - St. Joseph, MI 24 mi17 min S 2.9 G 12 65°F 1019.6 hPa (-0.7)
HLNM4 - 9087031 - Holland, MI 26 mi35 min SE 8.9 G 15 64°F 49°F1018.4 hPa38°F
MKGM4 - Muskegon, MI 57 mi17 min S 22 G 24 58°F 1018.5 hPa (-0.4)40°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 mi21 minSSE 810.00 miFair65°F37°F37%1019.6 hPa
Southwest Michigan Regional Airport, MI20 mi24 minSSE 1210.00 miFair63°F39°F43%1019.3 hPa

Wind History from LWA (wind in knots)
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Last 24hrS3S6CalmSW4W3W6W7W5W3S8S5S4S4S4S3S5S6SE6SE6S3S3S4S7S10
G14
1 day agoN14
G20
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E4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoN10
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N8N9
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N9N7N3CalmCalmNE6N6N5NE11NE12
G20
N8N8N9N11NE12
G19
N11
G18

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 (10,2,3,4)
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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.