--- a/artifacts/src/main/java/org/dive4elements/river/exports/extreme/ExtremeWQCurveGenerator.java	Wed Jul 10 14:26:31 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/extreme/ExtremeWQCurveGenerator.java	Wed Jul 10 14:49:21 2013 +0200
@@ -14,6 +14,7 @@
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.plot.Marker;
 import org.jfree.chart.plot.ValueMarker;
+import org.jfree.chart.plot.XYPlot;
 import org.jfree.chart.title.TextTitle;
 import org.jfree.data.xy.XYSeries;
 import org.w3c.dom.Document;
@@ -92,6 +93,16 @@
         return false;
     }
 
+    /** Overriden to show second axis also if no visible data present. */
+    @Override
+    protected void adjustAxes(XYPlot plot) {
+        super.adjustAxes(plot);
+        if (getCurrentGaugeDatum() != 0d) {
+            // Show the W[*m] axis even if there is no data.
+            plot.setRangeAxis(1, createYAxis(YAXIS.W.idx));
+        }
+    }
+
     /** Do Extreme Curve nonextrapolated points out. */
     protected void doExtremeCurveBaseOut(ArtifactAndFacet aaf, Document theme, boolean visible) {
         logger.debug("doExtremeCurveBaseOut");