Re: [idvusers] Precipitation accumulation

Hi Robert:

The GRIB accumulation variables are being read incorrectly in CDM/TDS version 4.2. They are hopefully correct in 4.3. Could you try using the TDS 4.3 version at

and let me know what you think? There are some real complexities in handling these fields that we need to look at closely.



On 11/14/2012 8:18 AM, Robert Dewey wrote:
I'm having trouble accumulating precipitation properly (using the NAM from
the Motherlode THREDDS). I'm using the Formula > Grids > Time Steps
functions, and getting weird results. I assume this is because the NAM
accumulates 3-hourly precipitation, but doesn't "reset" until every 12th
forecast hour... so the accumulation function is adding up everything in
between and giving values way too high. I tried selecting each individual
12th forecast hour, but that doesn't seem to work for some reason.

Any ideas?

Best Regards,

Robert Dewey
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