Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Lawrence, MI

Version 3.4
What's New / NOTES
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.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:43AMSunset 8:37PM Wednesday April 25, 2018 4:25 AM EDT (08:25 UTC) Moonrise 3:00PMMoonset 3:49AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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- 347 Am Edt Wed Apr 25 2018
.small craft advisory in effect through late tonight...
Today..North winds 15 to 25 knots. Sunny. Waves 5 to 7 feet.
Tonight..North winds 5 to 15 knots. Clear. Waves 4 to 6 feet subsiding to 1 to 3 feet toward daybreak.
Thursday..West winds 5 to 10 knots backing southwest late in the day. Sunny. Waves around 1 foot.
Thursday night..South winds 5 to 15 knots veering northwest 15 to 20 knots toward daybreak. Partly cloudy. A slight chance of rain showers overnight. Waves 1 foot or less building to 3 to 5 feet toward daybreak.
LMZ844 Expires:201804251515;;465174 FZUS53 KGRR 250747 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 347 AM EDT Wed Apr 25 2018 For waters within five nautical miles of shore on Lake Michigan LMZ844-251515-

7 Day Forecast for Marine Location Near Lawrence, MI
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location: 42.23, -86.09     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 250730
afdgrr
area forecast discussion
national weather service grand rapids mi
330 am edt Wed apr 25 2018
latest update...

synopsis short term long term marine

Synopsis
Issued at 330 am edt Wed apr 25 2018
the passage of a cold front this morning will end the threat of
showers and be followed by breezy and cool conditions today. High
pressure will provide a sunny and pleasant day Thursday with
lighter winds before another cold front on Friday brings our next
chance of showers. Cool weather with highs in the 50s will
prevail behind this front over the weekend, but a significant warm
up with highs in the 70s will follow for early next week.

Short term (today through Friday)
issued at 330 am edt Wed apr 25 2018
a few rain showers will remain possible through daybreak with the
mid level trough and sfc cold front still coming through.

Surprisingly sfc dew pts are around 50 early this morning ahead of
the front, which currently extends from about mt pleasant to
muskegon.

North winds will drive in much drier air behind the front and dew
points will fall into 30s. This will scour out the low clouds
this morning, but a broken diurnal cumulus deck should impact
areas east of highway 131 this afternoon with thermal troughing
and residual moisture progged at 850 mb.

High confidence for a sunny day with light winds on Thursday as
the sfc high slides through. Highs are expected to reach the
lower 60s, which is about normal for this time of year.

Next cold front upr trough has little moisture and brings only
light precip amounts chance pops late Thursday night and Friday.

Main impact of this next front will be to usher in more chilly
weather for a couple days.

Long term (Friday night through Tuesday)
issued at 330 am edt Wed apr 25 2018
a strong upper level disturbance moving in from the northwest will
bring scattered light rain showers Friday night. A few wet snow
flakes may mix in overnight north of i-96. After that high pressure
will build in to bring fair and seasonably cool wx this weekend.

Temps will undergo a significant moderating trend early next week as
strong south to SW flow warm air advection develops on the back side
of the departing ridge. High temps of around 70 degrees are
anticipated for Monday and temps will reach well into the 70s by
Tuesday.

Persistent SW flow WAA will allow high temps to reach the middle 70s
to near 80 degrees again Wednesday. The continued SW flow will also
result in a gradual increase in moisture and some showers and
thunderstorms are possible late Tuesday night into midweek.

Aviation (for the 06z tafs through 06z Wednesday night)
issued at 1145 pm edt Tue apr 24 2018
a mix of MVFR ifr conditions will gradually improve toVFR
overnight through mid morning and low clouds gradually dissipate
and exit.VFR conditions will then continue through the day
Wednesday and Wednesday evening. Northwest winds will ramp up to
around 10-20 kts late Wednesday morning through the afternoon with
highest gusts at kmkg.

Marine
Issued at 330 am edt Wed apr 25 2018
no changes to the small craft advisory as period of 15-25 kt
northerly flow through this evening leads to rough conditions on
lk mi. Winds and waves subsiding overnight and followed by more
tranquil conditions on Thursday. Wind and wave could reach
hazardous levels again on Friday behind the next cold front.

Hydrology
Issued at 321 pm edt Tue apr 24 2018
with no significant precipitation expected, river stages will
continue to fall and the 5 current advisories should be able to be
dropped relatively soon.

Grr watches warnings advisories
Mi... None.

Lm... Small craft advisory until 8 pm edt this evening for lmz848-849.

Small craft advisory until 2 am edt Thursday for lmz844>847.

Synopsis... Meade
short term... Meade
long term... Laurens
aviation... Laurens
hydrology... Tjt
marine... Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SVNM4 - South Haven, MI 16 mi26 min N 15 G 16 42°F
45168 17 mi26 min NW 14 G 18 43°F 40°F1 ft1016.5 hPa (+0.0)36°F
SJOM4 - St. Joseph, MI 23 mi26 min N 12 G 15 42°F 1016.6 hPa (+0.7)
45026 - St. Joseph, MI 33 mi26 min NW 12 G 18 42°F 44°F1 ft1016.4 hPa (+0.0)37°F
HLNM4 - 9087031 - Holland, MI 38 mi38 min N 11 G 15 49°F 1015 hPa38°F
45029 47 mi26 min N 12 G 14 44°F 38°F2 ft1017 hPa (+0.5)36°F
MCYI3 - Michigan City, IN 56 mi36 min NW 9.9 G 12 40°F 39°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, MI12 mi29 minN 8 G 1510.00 miMostly Cloudy45°F40°F87%1015.6 hPa
Southwest Michigan Regional Airport, MI20 mi33 minNNW 89.00 miMostly Cloudy44°F39°F85%1015.7 hPa

Wind History from LWA (wind in knots)
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Last 24hrE3CalmE3E3E4E5SE6E4E4NW10N9N11
G16
N6N9
G15
N5N6NE4NW3CalmCalmCalmN5CalmN8
1 day agoE5E3NE5NE6E8E6E8E6E8E7
G15
E5SE9E8N8CalmSW4S8S5SE5SE4S6SE3E4Calm
2 days agoCalmE3CalmE4SE5SE8SE10E10
G14
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G15
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G14
SE6CalmCalmCalmE3SE3E3CalmCalmE3

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (4,6,7,8)
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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.