What this page is about
ZyGrib is an alternative to the well known UGrib over which it has a number of advantages.
Introduction
ZyGrib is freeware developed initially for Linux/Ubuntu users but now also available for Windows applications. It is available under General Public Licence.
A Windows version of the software can be downloaded from http://www.ziltmagazine.com/software/. Unlike UGrib, there is no need to register. The download will probably be in Dutch but, using Options (Instellingen) - Language (Taal), there is a choice of English, French, German, Spanish, Italian and Greek.
The data are compressed so that file sizes are even smaller than usual making it ideal for use over cell phone or, even, satellite phone. Those with enquiring - and technical - minds might like to see the ZyGrib description page.
Latest versions of the software and versions for other operating systems can be downloaded from http://www.zygrib.org/index.php?page=abstract_en.
Setting up and using
This is all very intuitive. Areas can be selected by drag and drop or entry into a frame. Map projections can be chosen as well as amount of detail such as rivers, coastline definition, cities, latitude/longitude grid, scale.
zyGrib request panel
Weather elements required, number of days and time step are all entered into a frame as shown below. The selected area can also be amended here. By default, it will use your last selection.
zyGrib forecast from this request
Step on times using the Left/Right arrows - top left of the chart or by using Page Up or Down.
CAPE
A useful facility with zyGrib is the option to download the CAPE (Convective Available Potential Energy). This frightningly named parameter is an indicator of strong convection and, therefore, the risk of severe thunderstorms and lightning.
Weather sequences
This is a useful facility. Select a point on a zyGrib display by right-clicking. Select Meteotable from the small window that opens.
Installation problems?
Some sailors have had problems in installing the zyGrib software. For help go to the zyGrib Installation Problem page. This is a copy of text on a pdf file provided by Michael on S/Y Windjammer at Marmaris Yacht Marina, Turkey.
Click on pictures to enlarge
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