Marine Weather and Tides
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 6:04AM||Sunset 9:27PM||Monday June 18, 2018 1:01 PM EDT (17:01 UTC)||Moonrise 10:39AM||Moonset 12:00AM||Illumination 27%|
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|LMZ846 Holland To Grand Haven Mi- 933 Am Edt Mon Jun 18 2018 |
Rest of today..Southwest winds 10 to 20 knots veering northwest 5 to 10 knots late in the day. Mostly cloudy with a chance of showers and Thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the day.
Tonight..North winds 5 to 15 knots veering northeast after midnight. Cloudy with a chance of showers and Thunderstorms. Waves 1 to 2 feet.
Tuesday..Northeast winds 10 to 15 knots. Cloudy with a chance of showers and Thunderstorms. Waves 1 foot or less.
Tuesday night..East winds around 15 knots. Mostly cloudy with a chance of showers and Thunderstorms. Waves 1 foot or less.
|LMZ846 Expires:201806182115;;726935 FZUS53 KGRR 181333 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 933 AM EDT Mon Jun 18 2018 For waters within five nautical miles of shore on Lake Michigan LMZ846-182115-|
7 Day Forecast for Marine Location Near Beechwood, MIHourly EDIT Help
Area Discussion for - Grand Rapids, MI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 kgrr 181559|
area forecast discussion
national weather service grand rapids mi
1159 am edt Mon jun 18 2018
Issued at 325 am edt Mon jun 18 2018
a cold front pushing down from the north will bring showers
and thunderstorms today and tonight and usher in cooler
weather for the rest of the week.
Issued at 1201 pm edt Mon jun 18 2018
i did not make major changes to our on-going forecast. The
convection near the front has diminished. The core of low level
jet (50 to 60 kts) that supported the convection is moving off to
the east. This is seen nicely with recent radar trends. By noon
the core of the low level jet will be near bad axe so all of the
grr CWA will have strong speed divergence at low levels. Thus even
with mix layer capes in the 2000 j kg range and the precipitable
water values rising to near 2.3" the strong subsidence caused by
the speed divergence will strongly mitigate convective
development. That subsidence is shown well by the 700 to 300 mb
qvect convergence (early to mid afternoon shows divergence over
our cwa). So even with surface wind convergence on the front, I do
not expect to see much convection over our CWA through mid
However, I do expect some convection to impact our SW CWA from mid
afternoon into early this evening. There is a weak shortwave the
does allow from some dynamic lift (700-300 mb qvect
convergence weak 1000-850 moisture transport) into allegan and
van buren counties in the 3 pm till 8 pm time frame. Both the
namnest and the rap model show convection developing near and east
of mke 2-3 pm then moving SE into our SW counties as per above.
So,the SPC marginal risk does make sense. Downdraft capes are
near 500 j kg in that area late this afternoon. Overnight most if
not all of the convection will be south of our cwa.
Short term (today through Wednesday)
issued at 325 am edt Mon jun 18 2018
clouds and showers will be on the increase today as upper ridge
flattens and cold front sags south. Storms are not expected to be
organized or severe as deep layer shear is 20 to 25 knots.
We will have to watch for excessive rain amounts in areas where
storms train as the front is slow moving and precipitable water
values are around 2 inches late today and into tonight.
The rains should linger into Tuesday before the front continues to
move south into the ohio valley by Tuesday night. A sfc high
extending south from canada builds into lower michigan on
Wednesday bringing in drier and cooler air with dew points in the
Long term (Wednesday night through Sunday)
issued at 325 am edt Mon jun 18 2018|
it appears that we will start out dry and mild at the beginning of
the long term on Wed night. We will transition to a more unsettled
pattern with occasional rain chances from Fri through the weekend.
We will see the front that will come through the area today, finally
be pushed far enough south by Wed night to allow pcpn chances to be
low enough to have a dry fcst. The front will be driven south by the
nw flow on the SW periphery of the upper low over canada. We will be
under more of a direct influence of the upper ridge that will be in
the wake of the upper low.
The better chances of rain will start on Friday, and will remain
possible through the weekend. What happens is that an upper low that
settles into the central plains by mid-week, will get kicked out by
another trough low diving into the rockies. The plains low has been
shown fairly consistently to move NE into mi. This system looks to
pick up some of the moisture that will be impacting tx from the
gulf, which will help with pcpn chcs.
The main upper low will move out by Sunday, however another short
wave coming in from the NW will interact with some of the left over
moisture to bring at least a small chance of rain for sun.
Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 743 am edt Mon jun 18 2018
vfr conditions expected this morning then areas of MVFR and brief
ifr is possible this afternoon into tonight as showers and
thunderstorms push across southern lower michigan.
Issued at 325 am edt Mon jun 18 2018
a cold front pushes south across lake michigan today and tonight
but winds should remain below 25 knots and waves below 4 feet.
Some areas of fog will be possible into Tuesday before drier air
moves in behind the cold front.
Issued at 1210 pm edt Sun jun 17 2018
recent rain has resulted in a slight rise on a few rivers. With
river levels running near normal, no flooding is expected.
More rain is expected across the area Sunday night through Wednesday
night. Scattered to numerous showers and thunderstorms will develop.
Very heavy rainfall will be possible with the storms. This may
produce localized flooding.
Grr watches warnings advisories
Mi... Heat advisory until 6 pm edt this evening for miz064>067-071>074.
short term... Ostuno
long term... Njj
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|HLNM4 - 9087031 - Holland, MI||0 mi||44 min||S 14 G 16||1013.6 hPa|
|45029||10 mi||22 min||SW 7.8 G 12||70°F||68°F||2 ft||65°F|
|SVNM4 - South Haven, MI||26 mi||32 min||S 13 G 14||74°F|
|45168||27 mi||32 min||W 9.7 G 14||71°F||69°F||2 ft||1014.4 hPa||66°F|
|45161||29 mi||42 min||S 7.8 G 9.7||2 ft|
|MKGM4 - Muskegon, MI||32 mi||32 min||SW 11 G 11||68°F||1013.6 hPa||66°F|
|45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI||44 mi||72 min||SSW 12 G 14||65°F||59°F||1 ft||1013.7 hPa (+0.0)||63°F|
|SJOM4 - St. Joseph, MI||49 mi||62 min||SSW 12 G 15||78°F||1015.9 hPa (+0.3)|
Wind History for Holland, MI(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Holland - West Michigan Regional Airport, MI||6 mi||69 min||WSW 15||10.00 mi||Fair||83°F||72°F||70%||1014 hPa|
Wind History from BIV (wind in knots)
|1 day ago||N||W||SW||Calm||E||E||SE||E||SE||SE||SE||SE||Calm||S||S||Calm||S||S||S||S||SW||SW||SW||SW|
|2 days ago||Calm||E||S||N||E||S||S||S||S||SE||S||N|
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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.
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Wind Forecast for Grand Rapids, MI (13,3,4,5)(on/off)  Help
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