Monday, August21, 2017 L-36.com


Marine Weather and Tides
Grosse Pointe Farms, 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 6:44AMSunset 8:24PM Monday August 21, 2017 12:04 PM EDT (16:04 UTC) Moonrise 5:28AMMoonset 7:30PM Illumination 0% Phase: New Moon; Moon at 29 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
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This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ422 /o.exp.kdtx.ma.w.0045.000000t0000z-170811t2230z/ 632 Pm Edt Fri Aug 11 2017
.the special marine warning expired at 630 pm edt... The affected areas were... Lake st. Clair open lake (u.s. Portion)... St. Clair river... The Thunderstorms have moved out of the area and no longer pose a significant threat to boaters. Lat...lon 4261 8252 4255 8259 4256 8264 4251 8269 4251 8272 4248 8272 4248 8291 4254 8291 4259 8285 4266 8284 4272 8269 4270 8261 4265 8259 4265 8255 4276 8251 4287 8251 4287 8247 4280 8248 4276 8247 time...mot...loc 2231z 267deg 33kt 4265 8226 4265 8241
This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ422 Expires:201708112241;;236655 FZUS73 KDTX 112232 MWSDTX MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 632 PM EDT FRI AUG 11 2017 LCZ422-460-112241-

7 Day Forecast for Marine Location Near Grosse Pointe Farms city, MI
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location: 42.4, -82.89     debug


Area Discussion for - Detroit/Pontiac, MI
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Fxus63 kdtx 211110
afddtx
area forecast discussion
national weather service detroit pontiac mi
710 am edt Mon aug 21 2017

Aviation
As any remaining fog continues to vaporize during early morning,VFR
will consist of increasing cirrus and scattered cumulus as daytime
heating ramps up in the increasingly warm and humid air mass over
the region. Ongoing convection will remain west and south of the
terminal corridor through the morning. The MCS over iowa will follow
storms over indiana tracking to the southeast along the main
instability axis colocated with the surface warm front. It is
possible that a remnant shower could survive into SE michigan during
mid to late afternoon with some support from the MCV likely to
result from the upstream cluster of storms. Afternoon coverage is
expected to be too sparse to include in the terminal forecasts
compared to increasing coverage of showers and storms overnight
ahead of the low pressure system and cold front.

For dtw... VFR will consist of ceiling above 5000 ft during the
morning with some scattered cumulus during the afternoon. There
remains low potential for an isolated shower or storm during the
afternoon after morning activity tracks south of the ohio border.

Dtw threshold probabilities...

* very low for a thunderstorm during the afternoon.

Prev discussion
Issued at 336 am edt Mon aug 21 2017
discussion...

main bulk of unsettled weather will take place in the first portion
of the forecast before things dry out. An upper level low,
currently situated over the hudson bay, will rotate down across
ontario through the beginning of the week. A large trough
associated with this low will come across the great lakes region as
an associated surface low forms out over the northern plains and
travels east towards the area. This system will bring in increasing
chances for rain and storms to southeast michigan beginning late
this afternoon through Tuesday. As the surface low begins to form
out to the west today, southerly winds over the area will start to
bring in more moisture resulting in another warm and more humid day.

This humid airmass will be brief as the cold front brings in cooler
and drier air by Wednesday.

Some patchy areas of fog are expected to develop as more moisture
rich air filters in, before fig dissipates shortly after sunrise.

Earlier this morning, there was some thunderstorm activity that
fired over eastern illinois and has been slowly moving
east southeast. This will bring in some cloud debris to portions of
the CWA through the morning. This afternoon there will be a slight
chance for rain and a few isolated storms as surface based activity
may develop as a result of diurnal heating and increasing moisture
advection into the area. Better chances look to be over northern
portions of the CWA before chances increases over the entire cwa
coming into Tuesday. However, this does not bode too well for people
wanting to enjoy the partial solar eclipse over southeast michigan
as there looks to be clouds hanging around, although there is
potential for a few breaks in those clouds.

Chances increase overnight and into Tuesday as a cold front
approaches the area. This front will be in place to the north of the
area today before sagging across the CWA tomorrow. There is also a
thunderstorm complex, currently situated over western iowa, which
will move eastward during the early morning hours. Lots of
uncertainly with this complex and how it holds together. This may
also help in developing some activity over the area later today.

Cold front looks to be pushing eastward across the area starting
early Tuesday morning before quickly moving through by Tuesday
evening. This will provide the focus for rain and storms during the
day. Severe weather looks to stay minimal as instability stays lower
due to cloud cover and early timing. Cooler and drier air then
filters in behind the departing cold front Tuesday night. Quiet
weather then comes back into the picture for the remainder of the
week as high pressure moves in over the area from the northwest.

Temperatures cool off slightly back into the 70s for the second half
of the week before warming slightly back to near 80 this weekend.

Marine...

a weak front will stall over northern to central lake huron while
producing light and variable wind today before moving back northward
tonight ahead of the next low pressure system. Light southerly wind
will continue over the remainder of marine areas until increasing
from the southwest tonight as low pressure deepens while moving into
the straits region. Wind and waves will remain below SCA thresholds
leaving widespread showers and thunderstorms along and ahead of the
front as the primary marine weather impact before the frontal
passage. Strong northwest wind behind the front will have gusts
reaching 30 knots over the open waters of lake huron Tuesday night
as colder air spills into the region. As it stands now, the wind
pattern will be from the northwest direction enough to keep the
highest waves offshore of the southern lake huron nearshore zones
before veering toward the north and weakening during Wednesday. The
incoming air mass will be cold enough to produce enough instability
over the water for marginal waterspout potential Wednesday into
Thursday.

Hydrology...

a low pressure system developing over the plains states today will
reach the straits region by Tuesday morning and pull a strong cold
front through lower michigan. Moisture humidity will increase
considerably ahead of the front and provide fuel for numerous
showers and thunderstorms late tonight through Tuesday. Basin
average 24 hour rainfall totals are expected to be in the 0.25 to
0.50 inch range with locally higher amounts near 1 inch possible
where multiple thunderstorms occur. The potential for flooding is
expected to be limited by the fast movement of the associated cold
front which is projected to exit eastward by Tuesday evening.

Dtx watches warnings advisories
Mi... None.

Lake huron... None.

Lake st clair... None.

Michigan waters of lake erie... None.

Aviation... ..Bt
discussion... Sp
marine... ... .Bt
hydrology... .Bt
you can obtain your latest national weather service forecasts online
at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CLSM4 - St. Clair Shores, MI 5 mi64 min SE 5.1 G 6 75°F 1019.6 hPa (-0.4)
45147 - Lake St Clair 11 mi64 min SSE 1.9 G 3.9 75°F 73°F1018.8 hPa (-0.4)
AGCM4 25 mi46 min 82°F 1019.1 hPa
THLO1 - Toledo Light No. 2 OH 43 mi44 min SSE 8 G 8.9 76°F
MBRM4 - 9014090 - Mouth of the Black River, MI 47 mi46 min 85°F 1018.5 hPa
FTGM4 - 9014098 - Fort Gratiot, MI 49 mi46 min WNW 6 G 8.9 84°F 1018.6 hPa62°F

Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coleman A Young Municipal Airport, MI7 mi71 minN 010.00 miFair83°F68°F61%1018.8 hPa
Selfridge Air National Guard Base, MI15 mi2.1 hrsN 010.00 miPartly Cloudy81°F69°F69%1019 hPa
Troy, Oakland/Troy Airport, MI18 mi69 minSW 310.00 miFair82°F61°F50%1020 hPa

Wind History from DET (wind in knots)
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Last 24hrSW5SW5S8S10S9S6S8S5S4S5SE5S4CalmS4S3N4CalmCalmCalmCalmS4SW5CalmSE5
1 day agoW9NW8NW10NW10NW8NW11
G15
NW6NW4CalmSW3CalmCalmCalmCalmSW4W3CalmW3CalmCalmCalmS5S7SW9
2 days agoW12
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W8W6W5SW3SW4SW4W5W4W4W5W6W7W7NW8

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Detroit/Pontiac, MI (12,3,4,5)
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Ground Weather Radar Station Detroit, MI
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weather_mapweather_map weather_map

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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.