Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Pentwater, 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 6:42AMSunset 8:42PM Thursday April 26, 2018 9:29 AM EDT (13:29 UTC) Moonrise 4:08PMMoonset 4:25AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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
    EDIT      (on/off)   Help
LMZ848 Whitehall To Pentwater Mi- 346 Am Edt Thu Apr 26 2018
Today..South winds 10 to 20 knots. Sunny. Waves 1 to 2 feet.
Tonight..South winds 10 to 20 knots veering northwest late at night, then veering north toward daybreak. Partly cloudy in the evening, then mostly cloudy with a chance of rain showers overnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight.
Friday..North winds 10 to 20 knots. Mostly Sunny until midday, then mostly cloudy with a chance of rain showers in the afternoon. Waves 3 to 5 feet subsiding to 2 to 3 feet.
Friday night..North winds 15 to 25 knots. Mostly cloudy with a chance of rain showers in the evening, then partly cloudy overnight. Waves 1 to 2 feet building to 4 to 6 feet after midnight.
LMZ848 Expires:201804261530;;048081 FZUS53 KGRR 260746 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 346 AM EDT Thu Apr 26 2018 For waters within five nautical miles of shore on Lake Michigan LMZ848-261530-

7 Day Forecast for Marine Location Near Pentwater, MI
   Hourly   EDIT   Help
location: 43.78, -86.43     debug


Area Discussion for - Grand Rapids, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kgrr 261146
afdgrr
area forecast discussion
national weather service grand rapids mi
746 am edt Thu apr 26 2018
latest update...

aviation

Synopsis
Issued at 330 am edt Thu apr 26 2018
high pressure will provide sunny and pleasant weather today
before a cold front on Friday ushers in chilly weather for the
weekend. Highs on Saturday will struggle to reach 50 degrees. The
cold snap will be short lived however and above normal
temperatures in the 70s are expected for much of next week.

Short term (today through Saturday)
issued at 330 am edt Thu apr 26 2018
a real nice day is in store with the sfc ridge proving full sun
and light winds. One caveat to this however is that the afternoon
lake breeze front moving inland from lake mi will likely bring a
period of stronger westerly winds (10-20 mph) and send
temperatures down after reaching highs in the lower 60s. Latest
hrrr guidance suggests the lake breeze could penetrate rather far
inland later today, reaching grr around 4-5 pm and continuing east
of there through the early evening.

Light precip with the cold front arrives toward midnight around
ludington and continues southeast overnight. Best pops will be
north of i-96, where some snow flakes could even mix in. QPF with
the front expected to be under one tenth of an inch.

A much better chance of appreciable precip amounts arrive late in
the day Friday into Friday night. This is related to left front
quad of the 80-100 kt jet core diving down the back side of the
upper trough. Reflectivity progs from the cams suggest a
convective nature to the precip as it comes through on Friday
night, and even some potential for snow as sfc temps fall after
dark. Can't rule out some light accumulations on the grass at
night.

In the wake of Friday night's shortwave, Saturday looks quite
chilly and breezy with the upper trough fully entrenched over the
grtlks region. This pattern may also lead to a fair amount of
diurnal clouds, although the dry air mass may offset that
potential.

Long term (Saturday night through Wednesday)
issued at 330 am edt Thu apr 26 2018
the first part of next week will be very warm as temperatures climb
into the 70s Monday through Wednesday. High pressure over the
southeast us and developing low pressure over the northern plains
will result in a strong southwest flow across the midwest and great
lakes which will push temperatures upward.

The GFS and ECMWF show the plains low moving northeast into ontario
by Wednesday and the trailing cold front moving east toward lake
michigan. Chances for showers will increase late Wednesday and
especially Thursday. Both models show a second low developing over
kansas and riding northeast along the frontal boundary. This setup
would give us a chance to see quite a bit of rain and perhaps some
thunderstorms depending on the track of the low.

Aviation (for the 12z tafs through 12z Friday morning)
issued at 745 am edt Thu apr 26 2018
an area of stratus and fog was impacting far south central lwr mi
early this morning, so jxn and btl may have a couple hours of
ifr lifr through 14z before it mixes out.

OtherwiseVFR weather is expected today and tonight. Scattered
rain showers will be approaching the terminals after 09z Friday
from the northwest but predominatelyVFR CIGS vsbys are expected
as these move in.

Other feature of note today is the lake breeze front later in the
day. This may lead to a brief period of locally stronger gustier
westerly winds in the afternoon and early evening (with the
exception of jxn and lan).

Marine
Issued at 330 am edt Thu apr 26 2018
small craft advisories have expired, but the incoming cold front
late tonight may necessitate another round of advisories. Winds
increase out of the southwest ahead of the front, then shift
northerly behind it overnight. The after a brief lull, advisories
are a good bet again for Friday night and Saturday with strong
north flow and cold advection.

Hydrology
Issued at 328 pm edt Wed apr 25 2018
rivers are running near to above normal for late april. Only a
handful of locations remain above bankfull at this time. Local,
nuisance flooding may still be an issue for these particular
locations: ionia, eagle, maple rapids, newaygo, and evart. Looking
at the next 7 days, the next risk for rain comes late Thursday and
then again on Friday, but will have no impact on area rivers. Beyond
this, rain may return by the middle of next week but too early to
tell if this will have any impact on area rivers and streams.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Meade
short term... Meade
long term... 04
aviation... Meade
hydrology... Hoving
marine... Meade


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDTM4 - 9087023 - Ludington, MI 12 mi41 min SW 4.1 G 6 40°F 31°F
BSBM4 - Big Sable Point, MI 20 mi49 min S 6 G 8 39°F 1014.9 hPa
MKGM4 - Muskegon, MI 39 mi29 min NNW 2.9 G 4.1 39°F 1016.1 hPa (+0.6)36°F
45161 42 mi49 min NNW 1.9 G 3.9

Wind History for Ludington, MI
(wind in knots)    EDIT      (on/off)   Help
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
NE7
G16
N8
G15
N7
G16
NW7
G12
N11
G19
N6
G13
N10
G19
N7
G14
N8
G15
N5
G8
N5
G9
N2
N2
N3
NE1
E1
E2
NE2
E1
NW1
E2
E2
E2
SW5
1 day
ago
SE4
SE4
G7
W3
W4
NW7
NW5
G8
NW8
G13
NW6
G11
N7
G13
N6
G11
NE3
G6
NW4
NE7
G10
NE11
G19
NE8
G13
N6
G14
NE8
G13
N8
G14
N6
G10
N3
G6
N5
G8
N4
G8
N7
G11
N8
G15
2 days
ago
SE2
E6
G10
E2
G11
NW5
G8
NW7
G12
N8
G14
N5
G10
N6
G14
N7
G10
N6
G9
N4
N2
NE3
G6
E3
E2
SW6
NE2
E2
E2
E2
E1
NE2
E1
E3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ludington, Mason County Airport, MI12 mi34 minWSW 510.00 miFair40°F33°F78%1014.2 hPa

Wind History from LDM (wind in knots)
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrN14
G17
N11
G17
N14
G18
N15
G21
N15
G21
N16N13
G19
N12
G18
N8N5N3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW5
1 day agoSE4SE4SW4W5NW5NW5N7NW8N12
G17
N8NE3N6NE7NE8
G14
N8
G16
N9N8N6N7N3N9N6N10
G15
N11
G17
2 days agoE5NE6E8CalmNW8N10
G15
N13N10
G15
N9N5CalmN4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (9,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Grand Rapids/Muskegon, MI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.