Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Grosse Pointe Farms, 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 6:32AMSunset 8:26PM Wednesday April 25, 2018 4:19 AM EDT (08:19 UTC) Moonrise 2:46PMMoonset 3:36AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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.can.kdtx.ma.w.0056.000000t0000z-171015t1730z/ 111 Pm Edt Sun Oct 15 2017
.the special marine warning is cancelled... 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 4260 8254 4255 8259 4256 8264 4238 8282 4235 8293 4237 8300 4239 8295 4244 8291 4254 8291 4259 8285 4266 8285 4272 8269 4270 8261 4265 8259 4264 8256 4276 8251 4283 8251 4283 8247 4276 8247 time...mot...loc 1709z 271deg 36kt 4276 8242 4240 8263
This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ422 Expires:201710151721;;908498 FZUS73 KDTX 151711 MWSDTX MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 111 PM EDT SUN OCT 15 2017 LCZ422-460-151721-

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 250741
afddtx
area forecast discussion
national weather service detroit pontiac mi
341 am edt Wed apr 25 2018

Discussion
Cold front associated with the wave digging through the great lakes
is progressing south this morning and will clear through michigan
this morning. The inverted surface trough sending moisture northward
that is aiding showers and some patchy fog early this morning will be
shunted east by this front. Throughout today the upper level low
across the central appalachians will pivot northward and begin to get
absorbed by the trough currently tracking through the great lakes.

This consolidation will result in the wave slowing down slightly over
the central great lakes as it pivots over to the eastern great lakes
tonight and then well east by tomorrow. Anticipate that scattered
showers will come to an end for much of the area with clearing
conditions by late morning with incoming subsidence and dry air.

Slowing of the wave will allow the trailing PV to graze eastern
michigan. Combine that with the northerly flow and moisture boost off
of lake huron and eastern portions of the thumb will some extended
rain chances through afternoon. There will be gusty winds behind the
front as well with gusts up to 30 mph possible throughout the
afternoon.

Cold pool with temperatures at 850mb around 0c will bring
temperatures down a little further today into the low to mid 50s for
the inland areas. Temperatures in the 40s across portions of the
thumb where northerly flow off of lake huron will keep things
cooler. Clearing conditions overnight will allow for good
radiational cooling to occur with temperatures around freezing in
the low to mid 30s.

Shortwave ridge will build over michigan on Thursday and bring a
brief break from precipitation. Plenty of sunshine will allow
temperatures to rebound back into the lower 60s and upper 50s. Quick
return to wet conditions with another upper trough digging through
the great lakes on Friday. Cold front will accompany this system and
result in increased rain chances for Friday morning and afternoon
along the front. Vorticity MAX and upper jet will rotate through the
base of the trough keeping rain chances going Friday evening into
Saturday. The quality of moisture available to this system is not
great. Expecting QPF amounts around a tenth of an inch, which will
be more tied to the vorticity MAX than along the cold front. Cold
pool associated with this trough and persistent northwest flow will
result moderating high temperatures in low to mid 50s through the
weekend.

Upper ridge and surface high building in on Sunday will dominate the
weather into early next week. Full insolation with warm southerly
flow will allow temperatures to increase into the 60s by Monday and
70s by Tuesday. Some locations across the far lower michigan may
even reach 80 degrees on Wednesday.

Marine
A cold front that moved through earlier in the night left behind
moderate north wind over marine areas that will last through today.

The wind will have minimal impact on the smaller bodies of lake st
clair and western lake erie. However, small craft advisories remain
in effect for saginaw bay and southern lake huron as peak gusts top
out near 25 knots. The long north fetch will also build waves in
excess of 4 feet over outer saginaw bay and southern lake huron.

Both wind and waves diminish tonight as high pressure builds
overhead and holds through Thursday. The next front reaches northern
lake huron Thursday night and exits western lake erie by Friday
afternoon with a similar post frontal wind field. A larger area of
low pressure is projected to closely trail the front and reinforce
colder north wind and unsettled conditions through the weekend.

Prev discussion
Issued at 1202 am edt Wed apr 25 2018
aviation...

steady northward expansion of low level moisture now translating
into widespread low stratus carrying 400 to 600 ft ceiling heights
throughout the detroit and pontiac corridors. Further expansion
likely to impact fnt yet early this morning, leaving mbs as the only
southeast michigan terminal absent of lifr ifr conditions going
forward through the pre-dawn hours. The passage of a cold front will
bring improving conditions late morning 12z-15z . Window will exist
during the latter half of the morning for a limited coverage of
cloud coverage, before a diurnally invigorated MVFR or lowVFR
stratus emerges for the afternoon. Post-frontal daytime winds turn
northwesterly, with a modest gust component expected to remain below
20 kts.

For dtw... Low stratus holds firmly in place during the early-mid
morning period, only lifting with a cold frontal passage after 12z.

Post-frontal winds turn northwesterly and increase to 10-12 kts
Wednesday.

Dtw threshold probabilities...

* high for ceiling 5000 ft or less through 12z Wednesday.

* high for rain as precipitation type.

Dtx watches warnings advisories
Mi... None.

Lake huron... Small craft advisory from 8 am this morning to 10 pm edt this
evening for lhz421-441>443.

Small craft advisory from 8 am this morning to 6 pm edt this
evening for lhz422.

Lake st clair... None.

Michigan waters of lake erie... None.

Discussion... Aa
marine... ... .Bt
aviation... ..Mr
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 mi80 min Calm G 2.9 48°F 1013.9 hPa (-1.3)
AGCM4 25 mi50 min 49°F 1012.5 hPa
THLO1 - Toledo Light No. 2 OH 43 mi40 min NNE 6 G 7 44°F
MBRM4 - 9014090 - Mouth of the Black River, MI 47 mi50 min 47°F 1012.5 hPa
FTGM4 - 9014098 - Fort Gratiot, MI 49 mi50 min NE 5.1 G 6 44°F 1012.5 hPa43°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 mi27 minENE 34.00 miFog/Mist49°F48°F97%1012.8 hPa
Selfridge Air National Guard Base, MI15 mi24 minN 07.00 miOvercast49°F49°F100%1012.8 hPa
Troy, Oakland/Troy Airport, MI18 mi25 minN 05.00 miLight Drizzle51°F49°F95%1013.5 hPa

Wind History from DET (wind in knots)
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Last 24hrCalmSE4E5E5E6SE9E8SE9SE86E11SE9SE8SE7E7E8E6E7E7E6E6E5NE4E3
1 day agoE7E5E6E6E9E9E7E9E9E9E8E9E11E8E8SE7S11SW7S4S4SW6CalmSE3SE3
2 days agoCalmCalmCalmE3E6NE7E9SE11E7E8
G17
E10SE8E9SE9E11E9E6NE7NE5NE4NE6NE5NE5NE6

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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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Detroit/Pontiac, MI (4,6,7,8)
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Ground Weather Radar Station Detroit, MI
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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.