Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Montague, MI

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:54AMSunset 8:42PM Tuesday August 20, 2019 8:34 PM EDT (00:34 UTC) Moonrise 10:24PMMoonset 10:43AM Illumination 71% Phase: Waning Gibbous; Moon at 20 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
LMZ872 Expires:201908211000;;945938 Fzus63 Kmkx 202003 Glflm Open Lake Forecast For Lake Michigan National Weather Service Milwaukee/sullivan Wi 303 Pm Cdt Tue Aug 20 2019 For Waters Beyond Five Nautical Miles Of Shore On Lake Michigan. Waves Are Provided As A Range Of Significant Wave Heights, Which Is The Average Of The Highest 1/3 Of The Wave, Along With The Average Height Of The Highest 10% Of The Waves Which Will Occasionally Be Encountered.
Synopsis.. Low pressure of 29.7 will move into wisconsin this evening and drag a cold front across the lake tonight into Wednesday morning. Gusty north winds are expected on Wednesday behind the front. Canadian high pressure of 30.2 inches will then move over the great lakes Thursday and Friday. Lmz080-669-671-673-675-777-779-870-872-874-876-878-211000- lake michigan from michigan city in to st. Joseph mi 5 nm offshore to mid lake- lake michigan from sheboygan to port washington wi 5 nm offshore to mid lake- lake michigan from port washington to north point light wi 5 nm offshore to mid lake- lake michigan from north point light to wind point wi 5 nm offshore to mid lake- lake michigan from wind point wi to winthrop harbor il 5 nm offshore to mid lake- lake michigan from winthrop harbor to wilmette harbor il 5 nm offshore to mid lake- lake michigan from wilmette harbor il to michigan city in 5 nm offshore to mid lake- lake michigan from whitehall to pentwater mi 5 nm offshore to mid lake- lake michigan from grand haven to whitehall mi 5 nm offshore to mid lake- lake michigan from holland to grand haven mi 5 nm offshore to mid lake- lake michigan from south haven to holland mi 5 nm offshore to mid lake- lake michigan from st. Joseph to south haven mi 5 nm offshore to mid lake- 303 pm cdt Tue aug 20 2019 sheboygan wi to pentwater mi south...
Tonight..Southwest winds 5 to 10 kt becoming west 10 to 15 kt. Slight chance of showers and Thunderstorms. Waves 1 to 2 ft.
Wednesday..Northwest winds 10 to 20 kt becoming north 15 to 25 kt. Slight chance of showers and Thunderstorms in the morning. Waves 1 to 3 ft building to 3 to 5 ft.
Wednesday night..North winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
Thursday..Northeast winds 10 to 15 kt. Waves 1 to 3 ft.
Thursday night..Northeast winds 10 to 15 kt. Waves 2 to 4 ft.
Friday..Northeast winds 10 to 15 kt increasing to 10 to 20 kt. Waves 2 to 4 ft.
Friday night..Northeast winds 10 to 15 kt becoming east. Waves 1 to 3 ft.
Saturday..Southeast winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 3 ft.
Sunday..Southeast winds 10 to 20 kt becoming south. Waves 2 to 4 ft.
LMZ872


7 Day Forecast for Marine Location Near Montague, MI
   Hourly   EDIT   Help
location: 43.14, -87.03     debug


Area Discussion for - Grand Rapids, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kgrr 202315
afdgrr
area forecast discussion
national weather service grand rapids mi
715 pm edt Tue aug 20 2019
latest update...

aviation

Synopsis
Issued at 327 pm edt Tue aug 20 2019
- threat for strong to severe storms this afternoon and evening.

- isolated showers storms both tonight into Wednesday.

- dry weather Wednesday night through at least Sunday.

- cooler weather forecast Thursday through Saturday.

Discussion (this evening through next Tuesday)
issued at 327 pm edt Tue aug 20 2019
first concern in the 7 day forecast is the threat of thunderstorms
this afternoon and evening. Severe weather remains possible given
the amount of instability in place. MUCAPE values over the
southern 2 3rds of the forecast area remain in excess of 3000 j kg
with li's of -10c. So, plenty of instability is in place. Shear
remains lacking with 0-6km values less than 30 knots. So far the
warm sector cores have gone up modestly across the area but have
not reached severe levels. We are interested to see what happens
when the gust front associated with the MCV earlier convection
over illinois moves into an unstable air mass over the southwest
cwa. We should see convection grow upscale as this broken line of
showers and storms comes off the lake an into areas southwest of
grr. Showers and storms are likely late this afternoon and evening
as the MCV gust front moves east across our area. Cannot rule out
some severe weather with damaging winds and large hail being the
main threats.

Isolated to scattered showers and storms will remain possible
tonight and into much of Wednesday as it takes until late in the
day before the front progresses south of the forecast area. A
stronger storm or two will be possible from grr to the south and
east from the midday hours of Wednesday through the afternoon.

Wednesday night through Sunday looks to be dry with a slow moving
surface high pressure system moving through the area. Highs
Thursday through Saturday only look to top out in the 70s with
850mb temperatures in the +5c to +10c range.

Next chances for rain come out in the Monday Tuesday time frame of
next week when a cold front presses in from the west.

Aviation (for the 00z tafs through 00z Wednesday evening)
issued at 711 pm edt Tue aug 20 2019
scattered showers and thunderstorms diminishing from west to east
rapidly since 2200 utc. Any remnant showers should end by 0000 utc
so will leave all west michigan tafs dry tonight. Concerned about
fog development overnight. Inherited tafs show visibilities
falling to around 2sm around sunrise... Which appears reasonable.

Additional showers and possibly a few thunderstorms may develop
after 15z Wednesday as cold front pushes through area.

Marine
Issued at 327 pm edt Tue aug 20 2019
holding off on headlines for now, but am concerned about a period
of higher waves Wednesday starting up north near ludington at 11am
and working south through the course of the day. 3-5 footers look
quite possible with our local glerl model run off of the namnest
winds showing a few 6 footers. The waves drop below 4 feet via
this model run near south haven around midnight tomorrow night.

So, the time frame of concern is roughly noon on Wednesday to
midnight.

Winds will generally be on the light side through Wednesday
morning with waves remaining low as well through that time.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Duke
discussion... Duke
aviation... Mws
marine... Duke


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
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 32 mi35 min NNW 5.8 G 7.8 73°F 74°F1012.4 hPa70°F
45161 36 mi35 min NE 3.9 G 5.8 73°F 72°F2 ft1012.7 hPa (-1.9)
MKGM4 - Muskegon, MI 37 mi35 min N 2.9 G 4.1 77°F 1012 hPa (-2.2)71°F
45029 43 mi25 min SE 5.8 G 7.8 74°F 73°F1 ft1011.9 hPa68°F
45013 44 mi35 min Calm G 1.9 73°F 71°F1 ft1013.4 hPa
PWAW3 - Port Washington, WI 48 mi55 min S 5.1 G 6 76°F 1013.9 hPa

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
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
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last
24hr
N2
NE2
E4
E4
E6
E6
E6
NE7
E6
E8
E7
E8
E6
E4
S7
S7
S5
S7
SE2
W12
SW23
G28
SW13
N10
G13
NE4
G7
1 day
ago
W8
NW6
W2
W8
W12
NW9
NW4
SW3
S4
SW4
S1
NW4
N4
E2
S6
SW7
SW6
SW6
W7
W6
NW5
N6
N4
2 days
ago
N3
E3
SE1
E3
E4
E3
S7
SE6
S7
SE6
G9
SE9
SE6
G9
SE10
G13
SE9
G14
S23
G35
S5
G9
SE9
G13
SE16
G21
S16
G22
W16
SW10
SW6
SW8
SW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI40 mi1.7 hrsSW 610.00 miMostly Cloudy77°F70°F79%1012.5 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last 24hrCalmCalmSE3NE3SE3CalmCalmE3NE3CalmE5E8E6E8E9SE6S5S6S9SW8SW12SW11
G17
SW6NW3
1 day agoW6W4SW6SW5SW4SW4W3W5NW6W6CalmCalmNE5CalmCalmNW46SW7SW9SW8SW7SW8SW4NW3
2 days agoCalmE3CalmSE4CalmE3CalmE4CalmE5SE8S5SE6S9S11S4SE15SE13
G20
S13
G25
SW15
G27
SW11
G18
SW11W8W7

Tide / Current Tables for
   EDIT   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    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 (20,4,5,8)
      (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.