mocruising
Well-Known Member
Can anyone give advice on the best weather sites (Online) or source of weather information for the coast from Bodrum to Antalya.
Best weather sites source of information for Eastern Med.
- Thread starter mocruising
- Start date
skipklaus
Member
charles_reed
Well-Known Member
Whilst using a good model, it suffers from the disadvantages of all the sites, it covers too large an area and is too generalised.
I prefer to download either the US NOOA GRIB or our own http://www.ecmwf.int/products/forecasts/d/charts (slightly better model). Use a little met knowledge you can produce a very much better forecast than that offered by any weathersite, by using GRIB. Use zygrib to produce the charts (but remember they're just idiot-computer predictions).
cmedsailor
Well-Known Member
http://isramar.ocean.org.il/isramar2009/
http://www.meteo.gr/SailingMapF.asp
http://www.weatheronline.co.uk
http://forecast.uoa.gr/forecastnew.php
http://www.poseidon.hcmr.gr/index_gr.php
Play with all of them. Check wind and waves.
http://www.meteo.gr/SailingMapF.asp
http://www.weatheronline.co.uk
http://forecast.uoa.gr/forecastnew.php
http://www.poseidon.hcmr.gr/index_gr.php
Play with all of them. Check wind and waves.
franksingleton
Well-Known Member
http://www.hnms.gr/hnms/english/nav...3-08-13 03:00:00&level=-1&wind_region=Greece2 should be the best for the area in the short term, ie up to 24 hours. I say that simply because they say that they do a “proper” data analysis including weather radar data. I doubt that there is much difference between the various models.
http://www.meteor.gov.tr/en-US/marine-metu3-detail.aspx?g=p&b=Sidra mentioned earlier is just a nice presentation of the GFS. It is the same info as zyGrib, Ugrib, Saildocs, the various apps, XCWeather, Passageweather etc.
For planning beyond the next day or so, you can use whichever is the easiest to get and which presentation you prefer. My own choice is Saildocs simply because I can get a forecast every day with my morning email check. I use the zyGrib viewer. For ad hoc updates, I use zyGrib.
http://www.ecmwf.int/products/forecasts/d/charts is or should be the best model but has little use for short term, fairly local products. Probably best used alongside the GFS for forward planning.
I do not know much about http://isramar.ocean.org.il/isramar2009/. On the basis that it is a national met service, I assume that they are doing a proper data analysis and that their forecasts are soundly based.
Re http://forecast.uoa.gr/forecastnew.php and http://www.poseidon.hcmr.gr/index_gr.php, these are GFS based. I am a little wary of Poseidon because it is not at all clear how much observational data they use to initialise the models... I would be surprised if the University of Athens had the computer power and/or the necessary human resources to develop and run the data analysis schemes necessary for detailed short term prediction.
Whatever you use, remember that GMDSS forecasts on VHF and NAVTEX are compiled by forecasters and are produced in the interests of safety. Always heed them. Never use automated forecasts for short term use without looking also at the GMDSS products.
http://www.meteor.gov.tr/en-US/marine-metu3-detail.aspx?g=p&b=Sidra mentioned earlier is just a nice presentation of the GFS. It is the same info as zyGrib, Ugrib, Saildocs, the various apps, XCWeather, Passageweather etc.
For planning beyond the next day or so, you can use whichever is the easiest to get and which presentation you prefer. My own choice is Saildocs simply because I can get a forecast every day with my morning email check. I use the zyGrib viewer. For ad hoc updates, I use zyGrib.
http://www.ecmwf.int/products/forecasts/d/charts is or should be the best model but has little use for short term, fairly local products. Probably best used alongside the GFS for forward planning.
I do not know much about http://isramar.ocean.org.il/isramar2009/. On the basis that it is a national met service, I assume that they are doing a proper data analysis and that their forecasts are soundly based.
Re http://forecast.uoa.gr/forecastnew.php and http://www.poseidon.hcmr.gr/index_gr.php, these are GFS based. I am a little wary of Poseidon because it is not at all clear how much observational data they use to initialise the models... I would be surprised if the University of Athens had the computer power and/or the necessary human resources to develop and run the data analysis schemes necessary for detailed short term prediction.
Whatever you use, remember that GMDSS forecasts on VHF and NAVTEX are compiled by forecasters and are produced in the interests of safety. Always heed them. Never use automated forecasts for short term use without looking also at the GMDSS products.
V1701
Well-Known Member
Worth a look at Windfinder Pro app as well...
franksingleton
Well-Known Member
Windfinder is GFS. The Superforecast, as far as I am aware, starts with the GFS 50 km output. It adds no more observational data and then calculates on a 9 km grid.
First, remember that any NWP model can only represent weather features of about 4 to 5 grid lengths at best.
Secondly, with no observational data added, the Superforecast will not know about small weather details. It can calculate the effects of topography but will, like other “unofficial” models be constrained by lack of meteorological input.
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The Turkish State Meteorological Office have several other forecasts in English. This is the 24 hour one http://www.mgm.gov.tr/en-US/marine-daily-report.aspx. Also http://www.mgm.gov.tr/en-US/marine-24hours.aspx and http://www.mgm.gov.tr/en-US/marine-3days.aspx
vyv_cox
Well-Known Member
I have been quite impressed with Poseidon this year. The Aegean weather has been highly changeable, to say the least, with a depression seemingly taking residence over Crete for much of June and July. Navtex forecasts quite rightly predict the maximum wind speeds in any particular sea area but these can be a good deal lower in other parts of the same area. Poseidon has dealt with this quite well, although not 100%, as might be expected.
franksingleton
Well-Known Member
Thank you.
I knew about their text forecast but not http://212.175.180.126/DENIZ/DTS/sea.php. That is a meso-scale forecast, probably using the WRF. I have to assume that they start with a good analysis. As members of ECMWF, they will have data on a 15 km grid. I do not know what other data they are using or whether they have the computer power and/or the technical kbow-how and ability to start from a truly detailed analysis.
The output should be useful for at least 24 hours. I do note that the go as far as 5 days but have t be sceptical about the wisdom of doing so.
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franksingleton
Well-Known Member
Thank you, Vyv.
Meteorology is a very open science and there is much interchange of ideas between groups worldwide through the World met organisation. Hence, I doubt that there is any great difference between NWP models. The main differences between various services are likely to be due to the data input.
Like most “unofficial” models, Poseidon starts with the GFS 50 km grid output. I do not know whether or not they use observational data to initialise their meso-scale models. That means that they may not be starting with a good, detailed analysis.
Turkey is a member country of ECMWF. That means that they should be starting with an analysis on a 15 km grid. Whether or not they have the resources to initialise their meso-scale model (probably the WRF) is uncertain. That does require a similar amount of computer resources to running the forecast.
Looked at fairly objectively, I would expect the Turkish meso-scale model to be at least as good as Poseidon and quite likely better. It would be interesting (to me, at least) to have some comparative feedback.
franksingleton
Well-Known Member
Further to the above, I have been in contact with the Turkish met service. Apparently, the forecasts at http://212.175.180.126/DENIZ/DTS/sea.php are straight from the ECMWF model – data points about 15 km apart. That was a surprise because I did not know that ECMWF allowed their surface wind data to be freely available. Had I looked closely enough, I might have realised that. The Turks add a wave model.
A drawback is that the data are only updated every 12 hours. Also, they are available rather later than the GFS. A plus is that they start from what should be a better analysis. Another plus is that, not being a meso-scale model, they should give useable results out to 5 days without the boundary effects that render meso-scale models useful only a few hours ahead.
For Med sailors, this should be a valuable resource. The user will, like with the GFS, have to add some intelligence – such as the strength of wind through the Bonifacio strait. Otherwise the detail in this output really makes the use of meso-scale models unnecessary. See http://weather.mailasail.com/w/uploads/Franks-Weather/turkmet-2.png
Another drawback is the size of the downloads. It is not a service for the bandwidth limited user.
A drawback is that the data are only updated every 12 hours. Also, they are available rather later than the GFS. A plus is that they start from what should be a better analysis. Another plus is that, not being a meso-scale model, they should give useable results out to 5 days without the boundary effects that render meso-scale models useful only a few hours ahead.
For Med sailors, this should be a valuable resource. The user will, like with the GFS, have to add some intelligence – such as the strength of wind through the Bonifacio strait. Otherwise the detail in this output really makes the use of meso-scale models unnecessary. See http://weather.mailasail.com/w/uploads/Franks-Weather/turkmet-2.png
Another drawback is the size of the downloads. It is not a service for the bandwidth limited user.
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