<div dir="ltr"><div>Thanks Jim.</div><div><br></div><div>Understand the function, but to use does it require me to first concatenate the individual grib2 files together for each time step required?</div><div><br></div><div>Brian</div><div><br></div><br><div class="gmail_extra"><br><div class="gmail_quote">On 4 August 2015 at 02:59, James T. Potemra <span dir="ltr"><<a href="mailto:jimp@hawaii.edu" target="_blank">jimp@hawaii.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hi Brian,<br>
<br>
You should be able to use the GrADS function "sum", e.g., 'd
sum(precip,t=1,t=384)'.<br>
<br>
Jim<div><div class="h5"><br>
<br>
<div>On 8/3/15 10:46 AM, Brian Gaze wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div>Hi,</div>
<div><br>
</div>
I'd like to be able to plot a chart using shading and contours
for a lat long range (rather than single point) which displays
the total accumulated precipitation for a series of time steps
rather than each individual one in the GFS run. For example,
total precipitation for 0 to 384 hours, lat 30 to 60, lon -45
-60.
<div><br>
</div>
<div>The GFS grib2 files don't seem to contain a variable with
this data so I'm guessing it's necessary to sum precipitation
values from each individual file? Any suggestions for the best
way to go about this?</div>
<div><br>
</div>
<div>Thanks</div>
<div><br>
</div>
<div>BWG</div>
</div>
<br>
<fieldset></fieldset>
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