<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div style="RIGHT: auto">Good Evening.</div>
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<div style="RIGHT: auto">I would like to know how to calculate potential vorticity in Grads.</div>
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<div style="RIGHT: auto">I download data from reanalysis.</div>
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<div style="RIGHT: auto">Temperature, u-wind, v-wind.</div>
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<div style="RIGHT: auto">I know how to produce maps about those topics but, as I said, I don't know how to calculate potential vorticity.</div>
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<div style="RIGHT: auto">By the way, I investigate a storm that occured in south of france in the beginning of november, 2011.</div>
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<div style="RIGHT: auto">Thank you,</div>
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<div style="RIGHT: auto">Adi.<VAR id=yui-ie-cursor></VAR></div></div></body></html>