Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Muskegon Heights, MI

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:55AMSunset 8:40PM Sunday August 20, 2017 7:39 AM EDT (11:39 UTC) Moonrise 4:30AMMoonset 7:05PM Illumination 3% Phase: Waning Crescent; Moon at 28 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
LMZ847 Grand Haven To Whitehall Mi- 300 Am Edt Sun Aug 20 2017
Today..South winds 5 to 15 knots. Sunny. Waves around 1 foot.
Tonight..South winds 5 to 10 knots. Partly cloudy. A slight chance of showers and Thunderstorms overnight. Waves 1 to 2 feet.
Monday..Southwest winds 5 to 15 knots. Then backing south late in the day. Partly Sunny with a slight chance of showers and Thunderstorms. Waves 1 to 2 feet.
Monday night..South winds 5 to 15 knots veering southwest 15 to 20 knots toward daybreak. Showers likely and a chance of Thunderstorms in the evening, then showers with Thunderstorms likely overnight. Waves around 1 foot.
LMZ847 Expires:201708201530;;659978 FZUS53 KGRR 200700 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 300 AM EDT Sun Aug 20 2017 For waters within five nautical miles of shore on Lake Michigan LMZ847-201530-

7 Day Forecast for Marine Location Near Muskegon Heights, MI
   Hourly   EDIT   Help
location: 43.23, -86.2     debug


Area Discussion for - Grand Rapids, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kgrr 201128
afdgrr
area forecast discussion
national weather service grand rapids mi
728 am edt Sun aug 20 2017
latest update...

aviation

Synopsis
Issued at 258 am edt Sun aug 20 2017
high pressure will bring one more day of fair weather then chances
for showers and thunderstorms increase early in the week. A cold
front moving in on Tuesday could bring a round of strong
thunderstorms. Fair and cooler weather will follow for the rest of
the week.

Short term (today through Tuesday)
issued at 258 am edt Sun aug 20 2017
two issues to focus on in the near term, first is the cloud
forecast for the partial solar eclipse that will be visible across
west michigan Monday afternoon and then the potential for severe
thunderstorms on Tuesday.

For Monday, the sfc high is retreating and a broad area of warm
advection is setting up with showers and thunderstorms forecast to
form Sunday night across wisconsin in area of mid level isentropic
ascent north of a warm front extending from nebraska to southern
wisconsin. These storms should dissipate as they move east Monday
morning with the weakening of the low level jet, but additional
storms are expected to fire up by the late morning across wisconsin
and move east, reaching western zones during the afternoon.

The amount of debris cloud from the overnight convection combined
with high and mid clouds from the second round of storms could
obscure skies across much of lower michigan by the afternoon.

It is worth mentioning here is that even thick cirrostratus
clouds wouldn't necessarily ruin the show as the partially
eclipsed Sun may still be visible, but if combined with even a
thin deck of mid level clouds such as a layer of altocumulus could
obscure it.

For Tuesday, flat upper ridging begins to get replaced by an
amplifying trough and impressive height falls for this time of year
occur late Tuesday into Wednesday, along with favorable
positioning of the upper jet which will bring upper divergence
across lower michigan. This is attended by strong speed shear and
if there is enough instability Tuesday afternoon, a line of
strong to severe storms could form along or out ahead of the cold
front. The main threat will be strong damaging winds and flooding
rains as p-wats are close to 2 inches.

Long term (Tuesday night through Saturday)
issued at 258 am edt Sun aug 20 2017
the long term portion of the forecast will see relatively quieter
conditions compared to the potentially active weather in the short
term on Mon night and Tue morning.

Drier weather is likely to have arrived before the forecast period
begins on Tue night. The cold front should have moved through the
entire area by then, sweeping all of the rich moisture out of the
area. We will be left with the upper trough lingering over the area.

This, along with a northerly low level flow holding on, will keep
cooler air in place for much of the week after tue.

We have rolled with a dry forecast for now for Wed and beyond. This
is a cautiously optimistic forecast for now. The upper trough will
linger through next fri, with the upper jet almost overhead through
the period. Moisture is forecast to be rather limited. This will
limit rain potential for short waves that could approach the area
from the nw. Toward the end of the week, the trough is expected to
get pushed out. This will allow for a moderating trend.

Aviation (for the 12z tafs through 12z Monday morning)
issued at 726 am edt Sun aug 20 2017
ifr conditions will prevail into tonight. Some showers and
thunderstorms could be arrive after 06z tonight across western
lower michigan. Winds will be southwest AOB 10 knots.

Marine
Issued at 258 am edt Sun aug 20 2017
winds and waves will be relatively light through Monday then
pick up Tuesday and Tuesday night with strong thunderstorms
possible at that time.

Hydrology
Issued at 315 pm edt Sat aug 19 2017
our hydrologic focus remains on early this coming week. Confidence
is increasing that Monday into Tuesday could feature locally heavy
rains with a favorable setup for thunderstorm activity across our
region, more so than many of our events that we have had this
summer. Medium range guidance is generally indicating a potential
for 1" or more of rain with this system, with pockets of less than
1" mainly east of us 131. Keep in mind that medium range models are
non-convection allowing so these amounts will likely be locally
underdone. With pwat values once again approaching 2.00" and
favorable h300 jet divergence h850 LLJ of 30-40 kts and a sfc
frontal boundary draped across the lower peninsula, it is not hard
to envision localized flooding (ie. Some water covered roads) with
this system. River responses depend on placement of rainfall and
duration of heavy rains. Small rivers and streams will be most
susceptible to quick rises.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Ostuno
short term... Ostuno
long term... Njj
aviation... Ostuno
hydrology... Hoving
marine... Ostuno


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
MKGM4 - Muskegon, MI 7 mi39 min S 4.1 G 4.1 67°F 1016.5 hPa (+0.8)67°F
45161 9 mi59 min SSW 5.8 G 5.8 71°F 71°F1016.7 hPa
45029 23 mi29 min SSW 7.8 G 9.7 70°F 72°F1 ft1016.9 hPa62°F
HLNM4 - 9087031 - Holland, MI 32 mi51 min SSE 5.1 G 7 68°F 1016.8 hPa
LDTM4 - 9087023 - Ludington, MI 51 mi51 min SSW 6 G 8.9 70°F 65°F

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
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
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
NE4
N3
NE2
N3
--
W3
SW5
W6
W7
SW8
W8
SW6
SW5
S5
S8
S5
S5
S7
E3
S4
S4
S4
E4
SE2
1 day
ago
W23
NW16
G21
W19
W20
W19
W19
G23
W18
G22
W17
W15
W16
W12
G15
W9
W6
SW4
SW3
E1
S3
SE1
SE2
E3
E5
E4
NE2
NE1
2 days
ago
SE10
G15
S13
G16
S13
G16
S14
G17
S13
G18
S14
G18
S17
S14
S15
S15
SW13
G22
S15
S12
S15
W11
G14
SW12
SW13
G16
SW18
G24
W18
G23
W19
G25
W20
W23
W21
W19
G25

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI5 mi44 minN 09.00 miA Few Clouds60°F57°F93%1016.8 hPa
Fremont Municipal Airport, MI18 mi45 minN 00.25 miFog57°F57°F100%1017.3 hPa

Wind History from MKG (wind in knots)
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 24hrCalmCalmNW7W7SW8W8W9W9W9SW9W9SW7S6CalmS3S3SW4CalmCalmSE3CalmSE3CalmCalm
1 day agoW15
G22
NW14
G22
W14
G20
W16
G23
W16
G22
W16
G25
W11
G20
W13W12W9W8W8W4SW3SW4SW3CalmSW6SW4CalmNE3CalmNW3Calm
2 days agoS8S12S13S11S12S12S12S12
G19
S13
G24
S12SW13SW13SW15SW12
G18
SW13
G24
W10
G18
SW15
G24
W11
G19
W9W9
G18
W11W9
G18
W16
G21
W11
G20

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 (7,2,3,4)
      (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.