Wednesday, April26, 2017 L-36.com


Marine Weather and Tides
Beechwood, MI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:42AMSunset 8:41PM Wednesday April 26, 2017 8:01 AM EDT (12:01 UTC) Moonrise 6:13AMMoonset 8:01PM Illumination 0% Phase: New Moon; Moon at 0 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
LMZ846 Holland To Grand Haven Mi- 303 Am Edt Wed Apr 26 2017
.small craft advisory in effect through Thursday morning...
Today..South winds 10 to 20 knots. Mostly cloudy. A chance of showers until midday, then a chance of showers and Thunderstorms in the afternoon. Waves 3 to 5 feet.
Tonight..South winds 10 to 20 knots. Showers and Thunderstorms likely. Waves 3 to 5 feet subsiding to 2 to 3 feet after midnight.
Thursday..Southwest winds to 30 knots. Showers and Thunderstorms likely until midday, then a chance of showers in the afternoon. Waves 2 to 4 feet.
Thursday night..West winds 10 to 20 knots. Partly cloudy. Waves 2 to 3 feet.
LMZ846 Expires:201704261515;;279192 FZUS53 KGRR 260703 NSHGRR NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GRAND RAPIDS MI 303 AM EDT WED APR 26 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ846-261515-

7 Day Forecast for Marine Location Near Beechwood, MI
   Hourly   EDIT   Help
location: 42.77, -86.21     debug


Area Discussion for - Grand Rapids, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kgrr 261041
afdgrr
area forecast discussion
national weather service grand rapids mi
641 am edt Wed apr 26 2017
latest update...

aviation

Synopsis
Issued at 306 am edt Wed apr 26 2017
a low pressure system developing in the southern plains will take
a track through the western great lakes region on Thursday. This
system will bring with it increasing chances for showers and
thunderstorms along with locally heavy rainfall. A stronger storm
arrives over the weekend with a risk for heavy rain and
thunderstorms.

Short term (today through Friday)
issued at 306 am edt Wed apr 26 2017
the warm and moist air advection is underway. This was leading to
a few showers closer to the lakeshore... And the deeper moisture.

Models are generating some instability during the daytime period
today. The cap that has been in place also is shown to diminish
somewhat. Mesoscale models are trying to develop a few rw/trw
today. Will feature a low risk for thunderstorms today... With the
highest pops closer to the lakeshore.

The upper level wave moves in tonight and Thursday. It takes on a
negative tilt. Combine that with an unseasonably moist airmass and
instability and you typically end up with plenty of showers and
thunderstorms along with locally heavy rain. The main period for
showers and thunderstorm should be from about 03z to 18z. This is
when the strengthening low level jet tracks through. Deep layer
shear does increase through the night and into Thursday morning.

This may act to organize the convection. Considering the stronger
low level wind fields that will be in place... Stronger wind gusts
look like the greatest risk.

We will need to monitor Friday for possibly another wave of low
pressure to track through. Models are in poor agreement on
this... With some showing almost no rain to others showing a risk
for flooding. NAM is the wettest while the high res euro the
driest. The GFS is between the two and generally what I used.

Long term (Friday night through Tuesday)
issued at 306 am edt Wed apr 26 2017
active weather will continue through much of the long range forecast
period. A few light rain showers are possible Friday night into
Saturday before a strong low pressure system with abundant gulf
moisture over the ARKLATEX region Saturday night moves north into
the western great lakes region.

1000-850 mb moisture transport will increase significantly late
Saturday night through Sunday night when widespread rain which could
be heavy at times will develop over our fcst area. Some convection
is anticipated as well.

Rainfall totals over our fcst area of one to two inches are likely
Saturday night through Sunday night with locally higher amounts
certainly possible if not probable. Temperatures should average
fairly close to normal for this time of year through the long range
fcst period.

Aviation (for the 12z tafs through 12z Thursday morning)
issued at 638 am edt Wed apr 26 2017
today is forecasted to be mostly aVFR day. A shower or
thunderstorm could develop especially as we go through the
afternoon. The coverage is not expected to be widespread enough to
put them in the forecast for now.

This evening... An increased risk for a band of thunderstorms to
move in from the southwest exists. Will mention them in the
forecast and impacts could occur as well. Moisture will be on the
increase tonight... Which should lower the cloud bases as well and
MVFR conditions are certainly possible.

Marine
Issued at 306 am edt Wed apr 26 2017
the wind and waves are currently lower than models were
forecasting. The pressure gradient is tightening which should
support an increase in the winds. Thus wave heights will be on
the increase. With a slight offshore component... The highest waves
will be primarily closer to the 5 nm mark. Will keep the headlines
going.

Hydrology
Issued at 330 pm edt Tue apr 25 2017
in spite of conditions drying out over the last few days, rivers
remain higher than normal across the area and a few decent
widespread rain events may prime them once again for a flood risk.

The muskegon and grand river basins in particular are running at
about the 75th percentile for this time of year. Rainfall amounts
Wednesday into Thursday could be locally heavy and the western
reaches of those basins may experience rises. Additional significant
rain this weekend over especially the central and western reaches of
those basins may cause some above bankfull rises and we will have to
monitor closely for a flood risk on the main stem rivers.

Grr watches/warnings/advisories
Mi... None.

Lm... Small craft advisory until 8 am edt Thursday for lmz844>849.

Synopsis... Mjs
short term... Mjs
long term... Laurens
aviation... Mjs
hydrology... Hoving
marine... Mjs


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
HLNM4 - 9087031 - Holland, MI 0 mi44 min ESE 11 G 16 63°F
45029 10 mi32 min SSE 9.7 G 12 56°F 47°F1 ft999.9 hPa49°F
SVNM4 - South Haven, MI 26 mi32 min SE 11 G 15 62°F
45168 27 mi32 min S 7.8 G 9.7 58°F 50°F1 ft1000.1 hPa51°F
45161 29 mi42 min SE 12 G 14 55°F 46°F1 ft999.9 hPa
MKGM4 - Muskegon, MI 32 mi32 min SSE 8.9 G 12 63°F 999.4 hPa55°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 44 mi72 min ESE 12 G 14 47°F 41°F1 ft999.2 hPa (-0.9)46°F

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
8
AM
9
AM
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
Last
24hr
E12
G15
E7
G13
SE7
G10
SE7
G12
S7
G10
S4
S3
SW2
NW1
NW1
N2
SE7
G16
SE4
SE3
E3
E5
E4
G9
E7
E9
G12
E11
E10
G15
E12
G20
SE12
G18
E10
G17
1 day
ago
E16
E16
E12
G15
E10
E7
E13
G16
E10
G16
W7
G11
NW4
E5
G13
E12
G16
E7
G12
E8
E5
E5
E6
E8
E10
G13
E12
G15
E9
G14
E8
E11
E13
E13
2 days
ago
SW6
SW5
S8
S4
S5
S7
S7
SW2
SW3
SW3
SW2
NW3
NW2
NW6
N2
NE2
NE4
NE5
NE6
E9
E14
G17
E14
E14
G17
E14
G18

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Holland - West Michigan Regional Airport, MI6 mi69 minSE 910.00 miFair61°F54°F78%1000.5 hPa

Wind History from BIV (wind in knots)
9
AM
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
Last 24hrSE6SE11S6SE9SE8SE5S8S10SE95SE8SE7CalmE5E4E8SE9SE8SE7SE8SE10SE9SE9SE8
1 day agoE7E5E6SE7E11E10E13E11SE13SE14
G19
SE9E7SE7SE8SE6E7SE11SE6SE9SE8SE9SE8SE8SE8
2 days agoW5W6W5W7W7W7NW9NW8NW5W5W5NW5W4CalmCalmCalmCalmN4E5E6E7E7E6E6

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)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (8,2,3,4)
      (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.