Displaying ensemble grids in the IDV can be memory intensive. If you are reading from a remote server, you also have to deal with the latency of reading the grids across the internet. There are several strategies you can use to reduce the amount of memory used by the IDV.
Edit→Remove All Displays menu to remove the displays
created in the previous exercise.Catalog data chooser, select the
Main IDV Catalog→Unidata IDD Model Data→UCAR(motherlode)→GlobalEnsemble Forecast System Model→NCEP-GEFS-Global 1p0deg Ensemble with Ensemble Dimension→latest NCEP-GEFS-Global 1p0deg Ensemble with Ensemble Dimension dataset. Fields panel,
expand the 3D grid tab and the Mass tab. Select the
geopotential height, the Contour Plan View display. Fields subset panel, and set the
Level to be 500 hectopascals, on the Times tab, uncheck the
Use All box, right click on the panel and select the
Select every third one menu option ,
set the Region to conver US CONUS, on the Ensemble tab, select the
All Members, or use the combination of Ctl and left mouse button
and select a few members in the listand, then click
the Create Display button. Contour Property Editor. For example:
entering 5460;5800 would only show the 5460 and 5800 contour lines.