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--></style></head><body class="hmmessage">I think you've done it already:<br>
<br>
First set up clevs and colors to suit your tastes<br>
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Then:<br>
<br>
Define vis = -1.33 + 0.45((2(tsfc - t850)) + (2 (tsfc - tdsfc)) + (2(w850)))<br>
<br>
Display sfc<br>
<br><br><div class="gmail_quote">On August 23, 2015 4:58:51 PM PDT, giacomo tricarico <mino-98@hotmail.it> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr">Hi, since grads can not plot Visibility well, I have found a formula for calculating it:<div><br /></div><div>Visibility = −1.33 + 0.45* FOGSI </div><div><br /></div><div>where FOGSI is </div><div><span style="font-size: 12pt;"><br /></span></div><div><span style="font-size: 12pt;">2 | Tsfc - T850 | + 2 ( Tsfc - Td sfc ) + 2 W850</span></div><div><span style="font-size: 12pt;"><br /></span></div><div><span style="font-size: 12pt;">where </span></div><div><br /></div><div>Tsfc=temperature near the surface,
Td sfc= dew point near the surface,
T850= temperature on 850 hPa level,
W 850 =wind speed on 850 hPa level. </div><div><a href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.112.260&rep=rep1&type=pdf" target="_blank">http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.112.260&rep=rep1&type=pdf</a></div><div>Since grads can plot all the variables above, how could I generate visibility in grads using that formula?</div><div><br /></div><div>Thanks all,</div><div>Giacomo</div> </div>
<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />gradsusr mailing list<br />gradsusr@gradsusr.org<br /><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br /></pre></blockquote></div><br>
Thanks,<br>
Mark Sponsler</body></html>