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Michael, This WRF file is 2.5 GBs which is somewhat unwieldy. At any rate, the standard advice for dealing with WRF output in the IDV is to post-process your data with the UPP first. http://www.dtcenter.org/wrf-nmm/users/overview/upp_overview.php Best, Unidata IDV Support > Full Name: Michael Geigert > Email Address: address@hidden > Organization: CTDEEP > Package Version: > Operating System: Windows 7 > Hardware: > Description of problem: > > I am trying to view data in IDV but it cannot read the WRFout file. > Apparently, these files are gridded differently and need some sort > of conversion? The (large) file is located at > > ftp://ftp.state.ct.us/pub/dep/air/public/wrfout_d01_2011-07-07_00_00_00 > > in case you can help. > > Ticket Details =================== Ticket ID: UHU-528691 Department: Support IDV Priority: Normal Status: Closed