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<font face="Arial">Alessandro:<br>
<br>
Different timesteps are different data:<br>
<br>
Hours 3, 9, 15, 21, 27, etc, contains the data for total rainfall
accumulated in the previous 3 hours.<br>
<br>
Hours 6, 12, 18, 24, 30, etc, contains the data for total rainfall
accumulated in the previous 6 hours.<br>
<br>
The way I work it is like this:<br>
<br>
if (mapintvl="006" | mapintvl="012" | mapintvl="018" |
mapintvl="024" | mapintvl="030" | mapintvl="036" | mapintvl="042"
| mapintvl="048" | mapintvl="054" | mapintvl="060" |
mapintvl="066" | mapintvl="072" | mapintvl="084" | mapintvl="096"
| mapintvl="108" | mapintvl="120" | mapintvl="132" |
mapintvl="144" | mapintvl="156" | mapintvl="168" | mapintvl="180")<br>
'd (apcp03-apcp03(t-1))*10'<br>
else<br>
'd const(apcp03,0.001,-u)*10'<br>
endif<br>
<br>
I hope this helps.<br>
<br>
Bill<br>
</font>
<pre class="moz-signature" cols="72">--
Bill Reilly
(+34) 686-110-748
<a class="moz-txt-link-abbreviated" href="mailto:bill@passageweather.com">bill@passageweather.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.passageweather.com">www.passageweather.com</a>
<a class="moz-txt-link-abbreviated" href="mailto:bill@brwebworks.com">bill@brwebworks.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.brwebworks.com">www.brwebworks.com</a>
</pre>
<div class="moz-cite-prefix">On 3/3/2016 11:03 AM, Alessandro Rossi
wrote:<br>
</div>
<blockquote
cite="mid:CANXd3o+LcepqukBpWFKC8YgrC35kLsxqti7KfLKXzBZ52VHP+g@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div>The precipitation values "apcpsfc" show the total rainfall
accumulated in the previous 3 hours? </div>
<div><br>
</div>
<div>eg: <a moz-do-not-send="true"
href="http://nomads.ncep.noaa.gov:9090/dods/gfs_0p25/gfs20160303/gfs_0p25_00z.ascii?apcpsfc[0:20][538][46]">http://nomads.ncep.noaa.gov:9090/dods/gfs_0p25/gfs20160303/gfs_0p25_00z.ascii?apcpsfc[0:20][538][46]</a></div>
<div><br>
</div>
<div>If I see the data of the run 00Z missing the first value it
refers to the hours 00Z second to rain from 00 to 03 the third
from 03 to 06 or not? </div>
<div>Because it seems to me that there is an anomaly with
accumulations expected eg to 18z value it was 2.8mm but the
gfs maps gave no rain accumulation in 3 hours prior to that
point. </div>
<div><br>
</div>
<div>Thanks a lot for help<br>
</div>
<div>Alex</div>
</div>
<br>
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<br>
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</pre>
</blockquote>
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