<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>Hi, since in my GRADS's files (produced by WRF-NMM Unipost) rain is in 3h steps, I would like to combine for example 2 ctl files, so that in one I have 6h rain:<div>how could I do this?<br><br>Thanks,</div><div>Giacomo</div> </div></body>
</html>