Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Grosse Pointe Woods, 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 6:30AMSunset 8:27PM Thursday April 26, 2018 9:32 AM EDT (13:32 UTC) Moonrise 3:54PMMoonset 4:09AM 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
LCZ460 Lake St Clair- 1003 Pm Edt Wed Apr 25 2018
Rest of tonight..Northwest winds 5 to 10 knots. Mostly clear. Waves 2 feet or less.
Thursday..West winds 5 to 10 knots early in the morning becoming light and variable...then becoming south 5 to 10 knots late in the afternoon. Sunny. Waves 2 feet or less.
Thursday night..South winds 5 to 10 knots. Mostly clear. Waves 2 feet or less.
Friday..South winds 5 to 10 knots early in the morning becoming light and variable...then becoming west 5 to 10 knots in the afternoon. Partly Sunny. A chance of light showers until late afternoon. Waves 2 feet or less.
Friday night..Northwest winds 5 to 10 knots in the evening becoming light and variable...then becoming north 5 to 10 knots early in the morning. Partly cloudy in the evening becoming mostly cloudy. A chance of light showers. Waves 2 feet or less.
Saturday..Northwest winds 10 to 15 knots becoming north 5 to 10 knots in the evening. Mostly cloudy with a chance of light showers early in the morning...then partly cloudy. Waves 2 feet or less.
Sunday..Northwest winds 5 to 10 knots. Clear. Waves 2 feet or less.
Monday..Southwest winds 5 to 10 knots. Clear. Waves 2 feet or less.
LCZ460 Expires:201804260815;;038070 FZUS63 KDTX 260203 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 1003 PM EDT Wed Apr 25 2018 Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...High pressure, 30.00 inches, will settle over the area and hold through Thursday. The next cold front is scheduled to arrive Thursday night and Friday with low pressure averaging 29.80 inches. Building high pressure behind the front will support moderate northwest flow on Saturday, diminishing for Sunday. LCZ460-260815-

7 Day Forecast for Marine Location Near Grosse Pointe Woods, MI
   Hourly   EDIT   Help
location: 42.43, -82.9     debug


Area Discussion for - Detroit/Pontiac, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdtx 261124
afddtx
area forecast discussion
national weather service detroit pontiac mi
724 am edt Thu apr 26 2018

Aviation
Overnight boundary layer decoupling has allowed surface dewpoint
depressions to decrease amidst some near-surface moisture to allow
for patchy ground fog to develop early in the TAF period. Brief
periods of MVFR ifr visibilities will be possible through 14z,
mainly at kdtw and kyip. Daytime heating will quickly erode any
linger ground fog thereafter withVFR and dry conditions prevailing
with skc for most of the day. After 00z, high clouds will be on the
increase ahead of an approaching cold front that will bring
scattered rain showers after 12z Friday. West to southwest winds
will be less than 10 knots today, backing southerly after 00z.

For dtw... Ground fog will result in periods of MVFR ifr visibility
through 13z-14z before dissipating with daytime heating. Outside of
the fog this morning,VFR conditions will prevail with light winds.

Dtw threshold probabilities
* none.

Prev discussion
Issued at 343 am edt Thu apr 26 2018
discussion...

skies have cleared across the thumb where dry air continues to push
south and the trough moves further east of the area. This clearing is
allowing temperatures to drop into the lower 30s and a couple spots
into the upper 20s. Conditions at the surface look somewhat
favorable for some shallow fog development across portions of the
area with light to calm winds, clear skies and cooling temperatures.

Most favorable time frame for development will be between 6 to 8 am.

Confidence is low in reaching enough reduction in visibility or
coverage to add mention in the grids, so will leave it out at this
time.

Today will consist of a quick passing ridge and surface high
pressure that will result in dry conditions. Southeast michigan will
see mostly clear skies through the day with only few scattered high
clouds moving in from the west. This will help bring temperatures
back up into the 60s for most locations. Winds will remain light and
westerly through the afternoon and evening before backing more out of
the southwest ahead of the next approaching system.

An upper trough will be digging through the great lakes and send a
cold front through michigan on Friday. There will be a chance for
rain along the front, but resident dry airmass will keep any
precipitation on the lighter side late morning and early afternoon.

Brief break in rain chances late afternoon and evening as embedded
shortwaves begin to dive south on the back side of the broader
trough, which will form a closed mid level low over the central great
lakes. Rain chances will increase Friday night into Saturday morning
as a surface low with support of left exit region jet dynamics
swings through central and lower michigan. The track of the surface
low pressure should keep higher rainfall amounts within the i-69 to
i-94 corridors and amounts of up to a quarter inch or less.

Cold pool consisting of 850mb temperatures around -5c will move
overhead during the afternoon. The cooler air moving in will result
in high temperatures dropping into the lower 50s and upper 40s for
Saturday. Dry northwesterly flow with a surface high pressure moving
into the western great lakes will bring any lingering showers to an
end in the afternoon and help clear out the clouds through the
evening. Clearing skies overnight Saturday will allow for favorable
radiational cooling to drop temperatures into the upper 20s and lower
30s.

Strong upper ridge building over the plains will slide east and take
hold of the region on Sunday into early next week. Dry conditions
and april insolation will lead to temperatures warming back up
during this time. Look for temperatures to climb back into the 60s
on Monday and then 70s for Tuesday and Wednesday. Rain chances
return on Wednesday as a closed low sets up over ontario and allows
strong moist advection under southwesterly flow to be pulled
northward into michigan along a frontal boundary.

Marine...

high pressure will build across the region today with light winds
gradually backing from northwesterly to southerly as the day
progresses. A cold front will move across the region Thursday night
and continuing into Friday. Unsettled conditions will accompany the
frontal passage into Friday night as an upper-level disturbance
swings through and spawns low pressure development across lower
ontario. Increased northwesterly winds associated with the front
will lead to gusts approaching 20 knots at times especially over
northern and central lake huron Friday. High pressure will then
build from the upper midwest heading into the weekend, with a
tightening pressure gradient leading to frequent gusts of 20-30
knots across much of lake huron. Waves may become hazardous for
small craft across much of the lake huron nearshore waters this
weekend with the gusty winds and favorable northerly fetch.

Dtx watches warnings advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Aviation... ..Irl
discussion... Aa
marine... ... .Irl
you can obtain your latest national weather service forecasts online
at

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
CLSM4 - St. Clair Shores, MI 3 mi93 min W 5.1 G 6 42°F 1014.9 hPa (+1.4)
AGCM4 24 mi45 min 43°F 1014.1 hPa
MBRM4 - 9014090 - Mouth of the Black River, MI 45 mi45 min 45°F 1013.6 hPa
THLO1 - Toledo Light No. 2 OH 45 mi93 min SW 5.1 G 5.1 45°F
FTGM4 - 9014098 - Fort Gratiot, MI 47 mi45 min NW 4.1 G 5.1 43°F 1013.6 hPa32°F

Wind History for Fort Gratiot, 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
NE11
NE9
NE19
NE20
NE22
NE22
NE19
G24
NE19
NE20
NE21
NE17
N9
G13
N4
NW5
G9
NW5
G8
NW4
G7
NW6
NW5
G10
NW6
G9
NW6
G9
NW7
G12
NW6
NW6
NW3
1 day
ago
SE15
S10
G13
S10
G14
SE11
G15
S11
G15
S8
G17
S12
G16
S14
G17
S12
G16
S9
SE6
G9
SE5
SE6
SE9
SE4
G8
E3
G6
E3
NE3
NE6
N8
G11
N11
G15
NE21
NE15
NE11
2 days
ago
NE9
NE8
NE8
G11
NE11
G14
NE13
NE13
NE8
G12
NE8
NE7
NE8
N7
N6
G9
NE7
S4
G8
SW6
SW6
SW4
G7
S3
S4
S4
S4
S5
S6
SE4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI6 mi40 minNW 610.00 miFair45°F35°F68%1014.8 hPa
Selfridge Air National Guard Base, MI14 mi98 minW 410.00 miA Few Clouds41°F30°F66%1014.7 hPa
Troy, Oakland/Troy Airport, MI17 mi38 minWNW 610.00 miFair45°F36°F72%1014.9 hPa

Wind History from DET (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
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrN10
G17
N11N9N11
G16
NW12
G22
N12N9N11
G21
N9N12NE12N8NE10N9CalmN3SW3W4W4W4W4CalmW4NW6
1 day agoSE9E8SE9SE86E11SE9SE8SE7E7E8E6E7E7E6E6E5NE4E3N5N3N3N6N10
2 days agoE9E7E9E9E9E8E9E11E8E8SE7S11SW7S4S4SW6CalmSE3SE3CalmSE4E5E5E6

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 Detroit/Pontiac, MI (9,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Detroit, 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.