Monday, July24, 2017 L-36.com


Marine Weather and Tides
Grosse Pointe, 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 6:15AMSunset 9:00PM Monday July 24, 2017 4:54 PM EDT (20:54 UTC) Moonrise 6:40AMMoonset 8:58PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 947 Am Edt Mon Jul 24 2017
Rest of today..Northwest winds 15 to 20 knots. Mostly cloudy. Waves 1 to 3 feet.
Tonight..North winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Mostly cloudy becoming partly cloudy late this evening becoming clear. Waves 2 feet or less.
Tuesday..North winds 10 to 15 knots becoming northeast 5 to 10 knots in the afternoon. Sunny. Waves 2 feet or less.
Tuesday night..Northeast winds 5 to 10 knots veering to the southeast after midnight. Clear. Waves 2 feet or less.
Wednesday..South winds 5 to 10 knots. Mostly Sunny becoming partly cloudy. Waves 2 feet or less.
Thursday..Northeast winds 5 to 10 knots. Mostly cloudy with a chance of showers and Thunderstorms. Waves 2 feet or less.
Friday..North winds 10 to 15 knots. Mostly clear. A chance of showers and Thunderstorms. Waves 2 feet or less.
LCZ460 Expires:201707242030;;756809 FZUS63 KDTX 241347 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 947 AM EDT Mon Jul 24 2017 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...Cool northerly wind at moderate speed will continue through the afternoon behind the morning front. High pressure of 30.20 inches will then build into the central Great Lakes tonight into Tuesday. LCZ460-242030-

7 Day Forecast for Marine Location Near Grosse Pointe, MI
   Hourly   EDIT   Help
location: 42.38, -82.9     debug


Area Discussion for - Detroit/Pontiac, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kdtx 241943
afddtx
area forecast discussion
national weather service detroit pontiac mi
343 pm edt Mon jul 24 2017

Discussion
A nice stretch of late july weather is set to unfold for the next
couple days as continental high pressure takes control in the great
lakes. Cooler northerly flow today has already scoured out the humid
air that was in place over the weekend and a little more drying is
expected tonight. This will set up comfortable overnight low
temperatures in the mid to upper 50s most locations, aided by
decreasing clouds during the evening and clear conditions by sunrise
Tuesday. Full Sun to start the day will get strong surface heating
underway which will then produce just some scattered cumulus during
the afternoon. Resulting highs in the lower 80s are right about
normal for july 25th.

The mesoscale circulation aloft over the northern plains today has
pacific coast origins but has been enhanced by plains convection
over the last 24-36 hours. The long wave ridge building over the
great lakes will steer this system through lake superior by Tuesday
evening and also nudge the surface high into the new england states
by Wednesday morning. The larger scale upper level features will
remain progressive thanks to the strong circulation moving through
the canadian rockies today that is projected to reach far northern
ontario by Wednesday. Low level flow developing from the south will
have high pressure origins at first but then transition to southwest
and a return of moisture from the mississippi valley by Wednesday
night. The incoming theta-e ridge has a shallow slope in the 850-700
mb layer but is building in at night for that nocturnal
destabilization factor to go along with at least some component of
low level jet forcing for moisture transport. Model QPF solutions
indicate healthy MCS signatures in the 12z nwp package which
suggests the low level jet will be active late Wednesday night into
Thursday morning.

The upper level low tracking eastward through canada along with a
shortwave moving along the canadian border and a disturbance ejecting
northeastward from the southwest us will bring the next period of
active weather to the region Thursday. These features will help
drive a cold front through southeast michigan with model solutions
coming into better agreement for the timing of the frontal passage.

Finer details regarding the track and timing of these disturbances
will help determine where low pressure will track and the better
forcing for thunderstorms will set up on Thursday. Current
indications are that the best forcing will be across the detroit
metro and areas to the south.

High pressure then builds into the region on Friday and remains in
place through the weekend keeping dry conditions in place through
Sunday. With thermal troughing residing over the region Friday
through Sunday, expect slightly cooler temperatures with highs
ranging from the 70s on Friday before slowly warming into the lower
80s on Sunday. Nighttime lows will range from the mid 50s to low 60s
during this period.

Marine
Northerly flow, gusting between 20 to 30 knots over the southern
lake huron basin this afternoon will gradually diminish tonight, and
drop at or below 15 knots for tomorrow as high pressure slides
through the central great lakes. No changes with small craft
advisories into the evening hours. Southerly winds will return
Tuesday night and Wednesday, topping out around 20 knots as warmer
air streams back in ahead of a cold front, which may trigger showers
and thunderstorms Wednesday night into Thursday as it sags south.

Prev discussion
Issued at 1251 pm edt Mon jul 24 2017
aviation...

surface heating slowly lifting cloud bases (vfr) and clouds mixing
out late this afternoon from northwest to southeast, with areas
downwind of lake huron with the northerly flow holding on the
longest. High pressure arriving tonight leading to light and
variable winds and mostly clear skies right into tomorrow.

Dtw threshold probabilities...

* high for ceiling at or below 5000 feet this afternoon, low
early this evening.

Dtx watches warnings advisories
Mi... Beach hazards statement until 8 pm edt this evening for miz048-049-
055-063.

Lake huron... Small craft advisory until 4 am edt Tuesday for lhz441>443.

Small craft advisory until 8 pm edt this evening for lhz421-422.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Bt jd
marine... ... .Sf
aviation... ..Sf
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 6 mi54 min N 17 G 22 70°F 1015.6 hPa (+1.0)
45147 - Lake St Clair 12 mi54 min N 16 G 19 69°F 74°F1014.4 hPa (+1.0)
AGCM4 26 mi54 min 70°F 1014.9 hPa (+1.2)
THLO1 - Toledo Light No. 2 OH 41 mi54 min NNW 17 G 20 68°F
MBRM4 - 9014090 - Mouth of the Black River, MI 48 mi54 min 68°F 1014.9 hPa (+1.6)

Wind History for Fort Gratiot, MI
(wind in knots)    EDIT      (on/off)   Help
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
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last
24hr
NE7
E6
G9
N6
N27
G33
NE3
W1
W3
NW2
G5
N2
N3
G6
NW5
NW5
G9
NW3
G8
NW6
G11
NW4
G9
NW10
G14
NW8
G15
NW9
G21
N12
G20
N7
G14
N12
G20
N14
G21
N24
G32
N27
1 day
ago
SE5
NW4
E6
SE4
N5
SE4
S1
G4
SE3
SE5
SE4
E7
E6
E3
E3
W2
NW1
NE3
NE3
N6
N7
NE6
NE6
NE6
NE5
2 days
ago
E5
G9
E5
NE4
NE4
N4
NE1
S1
W3
S6
S3
G6
S3
S2
S7
SW4
S6
S7
S8
S3
E6
NE11
NE11
N7
G10
E4
NE6
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI7 mi61 minN 13 G 2110.00 miMostly Cloudy72°F55°F55%1015 hPa
Selfridge Air National Guard Base, MI17 mi56 minN 16 G 2210.00 miMostly Cloudy71°F57°F62%1015.1 hPa
Troy, Oakland/Troy Airport, MI19 mi59 minN 13 G 1810.00 miMostly Cloudy72°F55°F56%1016.3 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI24 mi61 minN 810.00 miMostly Cloudy71°F55°F59%1015.2 hPa

Wind History from DET (wind in knots)
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
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrSE7SE5S65NW6N12
G21
NW3CalmCalmNW3CalmN7N8N4NW5N11
G17
N12NW12NW10N10
G15
N11
G17
N13
G20
N9
G18
N13
G21
1 day agoE8SE6N7N7NW10N6N5N3NW5NW6NW4NW4NW4NW4NW3NW4W4W446N5N6SE6SE7
2 days agoSE6SE4E6SE5E5CalmS5SE3S4SE3S6S7S6S4S4S4S9W7S5S5S63NW6W5

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 Detroit/Pontiac, MI (16,3,4,5)
      (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.