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Old 07-09-2014, 15:49   #16
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Re: Pilot Grib Files - Similar to Pilot Charts

Does anyone know how I can download old GRIB files? I am not so much interested in the prvailing winds, as in the dynamics. How far do fronts move and how fast and far do they travel. This is for going from the Bahamas to USVI in December.
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Old 07-09-2014, 16:44   #17
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Re: Pilot Grib Files - Similar to Pilot Charts

Grib files are only a prediction. I think you need historic data. This was used to build the averages for climatology plugin. I think a future version could do what you describe, but a detailed discussion of how it could be implemented would help.
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Old 07-09-2014, 17:07   #18
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Re: Pilot Grib Files - Similar to Pilot Charts

Thanks. I understand the prediction issues.

Still, for short time frames GRIBS should be pretty precise nowadays. So I figure if I pick a date and get a sequence of historic - day forecasts and chain the data together I should be pretty close.


Any idea when you may have that info, or where I can get my hand on the weather data for Bahamas and east to USVI for November 2013?

Would be great if one could just send an email request like for GRIB forecasts, and put a date into it to get the old data.
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Old 07-09-2014, 18:48   #19
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Re: Pilot Grib Files - Similar to Pilot Charts

Found From ClimatologyInformation.html in the data directory.

Quote:
Climatology Plugin For OpenCPN

Intended to aid in planning sailing voyages, to help visualize weather patterns, and to integrate with the weather routing plugin to compute optimal sailing routes.
Satellite weather data from the last 30 years is averaged, then represented using only useful bits, then compressed to produce a much smaller database used by the plugin.
Raw Data is compiled from the following sources:
Wind: ftp://eclipse.ncdc.noaa.gov/pub/seawinds/SI/uv/
Current: Dataset Discovery | PO.DAAC
Air Temperature: ftp://ftp.cdc.noaa.gov/Datasets/ncep.marin/air.mean.nc
Precipitation: ftp://ftp.cdc.noaa.gov/Datasets/cmap...ip.mon.mean.nc
Relative Humidity: ftp://ftp.cdc.noaa.gov/Datasets/icoa...h/rhum.mean.nc
Cloud: http://www.jisao.washington.edu/data...clim5079.ncSea
Level Pressure: http://www.jisao.washington.edu/data...adsclim5079.nc
Sea Surface Temperature: http://www.jisao.washington.edu/data...im6079.1deg.nc
Sea Depth: http://www.esrl.noaa.gov/psd/data/data.nodc.woa98.html
Cyclone Tracks: Unisys: A worldwide information technology company

Climatology Plugin is written and maintained by Sean D'Epagnier
Also suggest you read the "Warning about use of data" at the bottom.
Climatology Plugin | Official OpenCPN Homepage
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Old 07-09-2014, 20:32   #20
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Re: Pilot Grib Files - Similar to Pilot Charts

Here are some notes made during our efforts to download compile the data for Climatology which may be of some additional help.
Working List

Tropical Cyclones - Best Track Database
IBTrACS - International Best Track Archive for Climate Stewardship

Sea Temperature
sstcoadsclim6079.1deg.nc (Make -k downloads it)
http://www.jisao.washington.edu/data...im6079.1deg.nc

Clouds
cldccoadsclim5079.nc (Make -k downloads it)
http://www.jisao.washington.edu/data...adsclim5079.nc

Currents - Small files
C:\Data-Dart\Climate-Current-Small
102 files about 9449kb each, running
From: oscar_vel7001.nc.gz to oscar_vel7514.nc.gz
ftp://podaac-ftp.jpl.nasa.gov/allDat..._vel7001.nc.gz and down.
Note: These files must be extracted. GZ files cannot be read by Gendata/Makefile!! (make -k)

Currents - 2009,2010,2011,2012,2013 yearly files
C:\Data-Dart\Climate-Current
2009,2010,2011,2012,2013 in single large files
From: ftp://podaac-ftp.jpl.nasa.gov/allDat..._vel2009.nc.gz
To: ftp://podaac-ftp.jpl.nasa.gov/allDat..._vel2013.nc.gz

Wind Daily 1980s - 200s
C:\Data-Dart\Climate-winds-Daily
ftp://eclipse.ncdc.noaa.gov/pub/seaw...uv/daily/ieee/

Winds 6hr 1980s-200s
C:\Data-Dart\Cllimate-winds-6hr
ftp://eclipse.ncdc.noaa.gov/pub/seaw...ly/ieee/2000s/
ftp://eclipse.ncdc.noaa.gov/pub/seaw...ly/ieee/1990s/
ftp://eclipse.ncdc.noaa.gov/pub/seaw...ly/ieee/1980s/

slpcoadsclim5079.nc http://www.jisao.washington.edu/data...im6079.1deg.nc

sstcoadsclim6079.1deg.nc ftp://ftp.cdc.noaa.gov/Datasets/ncep.marine/air.mean.nc
air.mean.nc http://www.jisao.washington.edu/data...adsclim5079.nc

cldccoadsclim5079.nc ftp://ftp.cdc.noaa.gov/Datasets/cmap...ip.mon.mean.nc

precip.mon.mean.nc ftp://ftp.cdc.noaa.gov/Datasets/cmap...ip.mon.mean.nc
precip.mon.mean.nc
rhum.mean.nc ftp://ftp.cdc.noaa.gov/Datasets/icoa...h/rhum.mean.nc
`landseadepth.nc' http://www.esrl.noaa.gov/psd/repository/entry/get/PSD Climate Data Repository/Public/PSD Datasets/PSD Gridded Datasets/nodc.woa98/masks/landseadepth.nc?entryid=synth%3Ae570c8f9-ec09-4e89-93b4-babd5651e7a9%3AL25vZGMud29hOTgvbWFza3MvbGFuZHNlYWR lcHRoLm5j"

Landseadepth
http://www.esrl.noaa.gov/psd/repository/entry/get/PSD Climate Data Repository/Public/PSD Datasets/PSD Gridded Datasets/nodc.woa98/masks/landseadepth.nc?entryid=synth%3Ae570c8f9-ec09-4e89-93b4-babd5651e7a9%3AL25vZGMud29hOTgvbWFza3MvbGFuZHNlYWR lcHRoLm5j"

Relative Humidity ftp://ftp.cdc.noaa.gov/Datasets/icoa...h/rhum.mean.nc
Precip ftp://ftp.cdc.noaa.gov/Datasets/cmap...ip.mon.mean.nc
http://www.jisao.washington.edu/data...adsclim5079.nc
ftp://ftp.cdc.noaa.gov/Datasets/ncep.marine/air.mean.nc


Fog ?
Visibility?
Wave Height ?
Swell ?
Marine Distress Alerts?
Shipping density?

====
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Old 04-05-2015, 21:18   #21
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Re: Pilot Grib Files - Similar to Pilot Charts

Hi there. I'm interested in this conversation. Like Gleason, I would like to get a grib file of the winds as depicted in the COGOW project, or based on Pilot Charts, which I can load into a router.

In summary, for a given month (or fortnight if it existed) and a given large area (eg North Atlantic) I would like to get the grib file which depicts the most likely wind pattern based on historical data. I need the standard grib format which can be loaded straight into Expedition or QtVlm.

Thanks if someone can help me here.

John
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Old 05-05-2015, 03:31   #22
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Re: Pilot Grib Files - Similar to Pilot Charts

John this is an old thread and a conceptual one that has been implemented in the plugin called Climatology. Please read the documentation on climatology plugin which Sean implimented and I helped with data collection, processung and testing. If there is something you think is missing in climatology please let us know. We are very lucky to have this plugin by Sean!

Sent from my SCH-I545 using Cruisers Sailing Forum mobile app
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Old 05-05-2015, 04:15   #23
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Re: Pilot Grib Files - Similar to Pilot Charts

Many thanks for your quick response. This sounds very exciting. I will follow through on your links and be in touch. Also, I'm messaging you with my email details etc.
cheers
John
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