<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Bumping up this issue in case it was lost in translation. <br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 9. Jul 2018, at 12:13, Guido Cioni <<a href="mailto:guidocioni@gmail.com" class="">guidocioni@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear all,<div class="">I've been struggling with this problem for a while now, and that led me to believe that I may have discovered a bug or at least an unexpected behaviour.</div><div class=""><br class=""></div><div class="">Little bit of background. I process NWP model output daily for my website and among the multiple plots that I do with NCL there is one that uses mid- low-level clouds, precip. and snow on the same map. Now, what happens sometimes is that values of either rain or snow are really small or even 0. Although I have fixed explicit levels, this causes the plotting routine to produce the warning </div><div class=""><br class=""></div><div class=""><font face="Menlo" class="">warning:ContourPlotSetValues: Data values out of range of levels set by EXPLICITLEVELS mode</font></div><div class=""><br class=""></div><div class="">and fill the entire contour area with a single color, as you can see in the animation that I'm attaching. This basically covers everything on the plot, making any interpretation of the results impossible. I think that, even in the case of low values, the entire area should stay transparent...</div><div class=""><br class=""></div><div class=""></div></div><span id="cid:47EB4A5D-8ACF-488D-B84D-6954CD77166B@mpimet.mpg.de"><output.gif></span><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><div class=""></div><div class=""><div class="">Is there any way to fix this?</div><div class=""><br class=""></div><div class="">I'm attaching an example script. </div><div class=""></div></div></div><span id="cid:C04AF062-3A46-48B1-8AE8-08075DCA2E7F@mpimet.mpg.de"><plot_rain_clouds_nord.ncl></span><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><div class=""></div><div class="">Cheers </div><div class=""><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class="Apple-interchange-newline">Guido Cioni</div><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="http://guidocioni.altervista/" class="">http://guidocioni.altervista</a>.org</div>
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<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class="Apple-interchange-newline">Guido Cioni</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="http://guidocioni.altervista" class="">http://guidocioni.altervista</a>.org</div>
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