diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e84cf18..54145c8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Fixed
+- Custom [getHoverSounding](https://chird.github.io/meteoJS/doc/module-meteoJS_thermodynamicDiagram_plotDataArea.html#~getHoverSounding)
+  function for
+  [PlotAltitudeDataArea](https://chird.github.io/meteoJS/doc/module-meteoJS_thermodynamicDiagram_plotAltitudeDataArea.PlotAltitudeDataArea.html),
+  [TDDiagram](https://chird.github.io/meteoJS/doc/module-meteoJS_thermodynamicDiagram_tdDiagram.TDDiagram.html),
+  [WindspeedProfile](https://chird.github.io/meteoJS/doc/module-meteoJS_thermodynamicDiagram_windspeedProfile.WindspeedProfile.html) and
+  [Hodograph](https://chird.github.io/meteoJS/doc/module-meteoJS_thermodynamicDiagram_hodograph.Hodograph.html).
 
 ## [1.16.0] - 2021-07-30
 ### Added
diff --git a/src/meteoJS/thermodynamicDiagram/Hodograph.js b/src/meteoJS/thermodynamicDiagram/Hodograph.js
index adb56558..95980a2c 100644
--- a/src/meteoJS/thermodynamicDiagram/Hodograph.js
+++ b/src/meteoJS/thermodynamicDiagram/Hodograph.js
@@ -224,7 +224,7 @@ export class Hodograph extends PlotDataArea {
     origin = undefined,
     filterDataPoint = undefined,
     minDataPointsDistance = 0
-  }) {
+  } = {}) {
     super({
       svgNode,
       coordinateSystem,
@@ -501,6 +501,7 @@ export class Hodograph extends PlotDataArea {
         nearestLevelData = {};
       return nearestLevelData;
     },
+    getHoverSounding = undefined,
     hodograph = {}
   }) {
     if (!('visible' in hodograph))
@@ -525,7 +526,8 @@ export class Hodograph extends PlotDataArea {
       type,
       maxDistance,
       insertLabelsFunc,
-      getLevelData
+      getLevelData,
+      getHoverSounding
     });
   }
 
diff --git a/src/meteoJS/thermodynamicDiagram/PlotAltitudeDataArea.js b/src/meteoJS/thermodynamicDiagram/PlotAltitudeDataArea.js
index c9e7b8d1..295f6bd7 100644
--- a/src/meteoJS/thermodynamicDiagram/PlotAltitudeDataArea.js
+++ b/src/meteoJS/thermodynamicDiagram/PlotAltitudeDataArea.js
@@ -125,7 +125,8 @@ export class PlotAltitudeDataArea extends PlotDataArea {
         return {};
       const sounding = hoverLabelsSounding.sounding;
       return sounding.getData(sounding.getNearestLevel(e.diagramPres));
-    }
+    },
+    getHoverSounding = undefined
   }) {
     this._isHoverLabelsRemote = remote;
 
@@ -134,7 +135,8 @@ export class PlotAltitudeDataArea extends PlotDataArea {
       type,
       maxDistance,
       insertLabelsFunc,
-      getLevelData
+      getLevelData,
+      getHoverSounding
     });
   }
 }
diff --git a/src/meteoJS/thermodynamicDiagram/TDDiagram.js b/src/meteoJS/thermodynamicDiagram/TDDiagram.js
index f699f52d..da2b1c29 100644
--- a/src/meteoJS/thermodynamicDiagram/TDDiagram.js
+++ b/src/meteoJS/thermodynamicDiagram/TDDiagram.js
@@ -1009,6 +1009,7 @@ export class TDDiagram extends PlotAltitudeDataArea {
     maxDistance = undefined,
     remote = true,
     insertLabelsFunc = undefined,
+    getHoverSounding = undefined,
     pres = {},
     temp = {},
     dewp = {},
@@ -1089,7 +1090,8 @@ export class TDDiagram extends PlotAltitudeDataArea {
       type,
       maxDistance,
       remote,
-      insertLabelsFunc
+      insertLabelsFunc,
+      getHoverSounding,
     });
   }
   
diff --git a/src/meteoJS/thermodynamicDiagram/WindspeedProfile.js b/src/meteoJS/thermodynamicDiagram/WindspeedProfile.js
index 57c703ce..f5b1cf2d 100644
--- a/src/meteoJS/thermodynamicDiagram/WindspeedProfile.js
+++ b/src/meteoJS/thermodynamicDiagram/WindspeedProfile.js
@@ -63,11 +63,12 @@ import PlotAltitudeDataArea from './PlotAltitudeDataArea.js';
  * 
  * @typedef {module:meteoJS/thermodynamicDiagram/plotAltitudeDataArea~options}
  *   module:meteoJS/thermodynamicDiagram/windspeedProfile~options
+ * @property {number} [windspeedMax=77.17] - Maximum visible windspeed, in m/s.
  * @property {Object} [grid] - Options for grid.
  * @property {module:meteoJS/thermodynamicDiagram/windspeedProfile~isotachsOptions}
- *   [isotachs] - Options for isotach grid. By default, the lines are grey and dashed.
+ *   [grid.isotachs] - Options for isotach grid. By default, the lines are grey and dashed.
  * @property {module:meteoJS/thermodynamicDiagram/windspeedProfile~isobarsOptions}
- *   [isobars] - Options for isobar grid. By default, the lines are grey and dashed.
+ *   [grid.isobars] - Options for isobar grid. By default, the lines are grey and dashed.
  */
 
 /**
@@ -117,7 +118,7 @@ export class WindspeedProfile extends PlotAltitudeDataArea {
     grid = {},
     filterDataPoint = undefined,
     minDataPointsDistance = 0
-  }) {
+  } = {}) {
     super({
       svgNode,
       coordinateSystem,
@@ -208,6 +209,7 @@ export class WindspeedProfile extends PlotAltitudeDataArea {
     maxDistance = undefined,
     remote = true,
     insertLabelsFunc = undefined,
+    getHoverSounding = undefined,
     windspeed = {}
   }) {
     if (!('visible' in windspeed))
@@ -236,7 +238,8 @@ export class WindspeedProfile extends PlotAltitudeDataArea {
       type,
       maxDistance,
       remote,
-      insertLabelsFunc
+      insertLabelsFunc,
+      getHoverSounding
     });
   }
   
diff --git a/test/meteoJS/thermodynamicDiagram/hodograph.test.js b/test/meteoJS/thermodynamicDiagram/hodograph.test.js
index 7e2ebeb3..7eb4a3a6 100644
--- a/test/meteoJS/thermodynamicDiagram/hodograph.test.js
+++ b/test/meteoJS/thermodynamicDiagram/hodograph.test.js
@@ -962,6 +962,57 @@ describe('Hodograph class, import via default', () => {
         assert.equal(hodograph._hoverLabelsGroup.children()[0].attr('r'), 10, 'circle width in hoverLabelsGroup');
       });
     });
+    it('default getHoverSounding', () => {
+      const soundings = Array.from({length: 3}, () => {
+        const s = new Sounding();
+        return new DiagramSounding(s);
+      });
+      const plotArea = new Hodograph();
+      assert.ok(plotArea._getHoverSounding !== undefined, 'internal getHoverSounding function');
+      soundings.map(s => plotArea.addSounding(s));
+      assert.equal(plotArea.hoverLabelsSounding, soundings[0], 'all visible: hover first sounding');
+      soundings[0].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'first invisible: hover second sounding');
+      soundings[1].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+      soundings[2].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+      soundings[1].visible = true;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'only second visible: hover second sounding');
+      soundings[2].visible = true;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'second and third visible: hover second sounding');
+    });
+    it('custom getHoverSounding', () => {
+      const soundings = Array.from({length: 3}, () => {
+        const s = new Sounding();
+        return new DiagramSounding(s);
+      });
+      const getHoverSounding = s => {
+        for (const sounding of s) {
+          if (sounding == soundings[2])
+            return sounding
+        }
+        return undefined;
+      };
+      const plotArea = new Hodograph({
+        hoverLabels: {
+          getHoverSounding
+        }
+      });
+      assert.equal(plotArea._getHoverSounding, getHoverSounding, 'internal getHoverSounding function');
+      soundings.map(s => plotArea.addSounding(s));
+      assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'all visible: hover third sounding');
+      soundings[0].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'first invisible: hover third sounding');
+      soundings[1].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+      soundings[2].visible = false;
+      assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+      soundings[1].visible = true;
+      assert.equal(plotArea.hoverLabelsSounding, undefined, 'only second visible: hover nothing');
+      soundings[2].visible = true;
+      assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'second and third visible: hover third sounding');
+    });
   });
 });
 describe('Hodograph class, import via name', () => {
diff --git a/test/meteoJS/thermodynamicDiagram/plotAltitudeDataArea.test.js b/test/meteoJS/thermodynamicDiagram/plotAltitudeDataArea.test.js
index d25a2f04..7d1c5675 100644
--- a/test/meteoJS/thermodynamicDiagram/plotAltitudeDataArea.test.js
+++ b/test/meteoJS/thermodynamicDiagram/plotAltitudeDataArea.test.js
@@ -41,6 +41,57 @@ describe('PlotAltitudeDataArea class, import via default', () => {
     s2.visible = false;
     assert.equal(plotArea.hoverLabelsSounding, s3, 'hoverLabelsSounding');
   });
+  it('default getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const plotArea = new PlotAltitudeDataArea();
+    assert.ok(plotArea._getHoverSounding !== undefined, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[0], 'all visible: hover first sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'first invisible: hover second sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'only second visible: hover second sounding');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'second and third visible: hover second sounding');
+  });
+  it('custom getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const getHoverSounding = s => {
+      for (const sounding of s) {
+        if (sounding == soundings[2])
+          return sounding
+      }
+      return undefined;
+    };
+    const plotArea = new PlotAltitudeDataArea({
+      hoverLabels: {
+        getHoverSounding
+      }
+    });
+    assert.equal(plotArea._getHoverSounding, getHoverSounding, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'all visible: hover third sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'first invisible: hover third sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'only second visible: hover nothing');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'second and third visible: hover third sounding');
+  });
   it('empty construction', () => {
     const svgNode = SVG().size(300,300);
     const coordinateSystem = new SkewTlogPDiagram();
diff --git a/test/meteoJS/thermodynamicDiagram/tdDiagram.test.js b/test/meteoJS/thermodynamicDiagram/tdDiagram.test.js
index 5d5288b8..24a854c5 100644
--- a/test/meteoJS/thermodynamicDiagram/tdDiagram.test.js
+++ b/test/meteoJS/thermodynamicDiagram/tdDiagram.test.js
@@ -161,6 +161,57 @@ describe('TDDiagram class, import via default', () => {
     assert.equal(diagram._hoverLabelsGroup.children()[6].children()[1].attr('font-size'), 50, 'font-size');
     assert.equal(diagram._hoverLabelsGroup.children()[6].children()[1].attr('color'), 'yellow', 'color');
   });
+  it('default getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const plotArea = new TDDiagram();
+    assert.ok(plotArea._getHoverSounding !== undefined, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[0], 'all visible: hover first sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'first invisible: hover second sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'only second visible: hover second sounding');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'second and third visible: hover second sounding');
+  });
+  it('custom getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const getHoverSounding = s => {
+      for (const sounding of s) {
+        if (sounding == soundings[2])
+          return sounding
+      }
+      return undefined;
+    };
+    const plotArea = new TDDiagram({
+      hoverLabels: {
+        getHoverSounding
+      }
+    });
+    assert.equal(plotArea._getHoverSounding, getHoverSounding, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'all visible: hover third sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'first invisible: hover third sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'only second visible: hover nothing');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'second and third visible: hover third sounding');
+  });
   it('parcels', () => {
     const diagram = new TDDiagram();
     assert.equal(diagram._soundings.size, 0, 'soundings size');
diff --git a/test/meteoJS/thermodynamicDiagram/windspeedProfile.test.js b/test/meteoJS/thermodynamicDiagram/windspeedProfile.test.js
index 0ca3b2ca..92c2ba6f 100644
--- a/test/meteoJS/thermodynamicDiagram/windspeedProfile.test.js
+++ b/test/meteoJS/thermodynamicDiagram/windspeedProfile.test.js
@@ -334,6 +334,57 @@ describe('WindspeedProfile class, import via default', () => {
     assert.equal(windprofile._hoverLabelsGroup.children()[0].attr().r, 3.5, 'circle');
     assert.equal(windprofile._hoverLabelsGroup.children()[0].attr().fill, 'red', 'circle');
   });
+  it('default getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const plotArea = new WindspeedProfile();
+    assert.ok(plotArea._getHoverSounding !== undefined, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[0], 'all visible: hover first sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'first invisible: hover second sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'only second visible: hover second sounding');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[1], 'second and third visible: hover second sounding');
+  });
+  it('custom getHoverSounding', () => {
+    const soundings = Array.from({length: 3}, () => {
+      const s = new Sounding();
+      return new DiagramSounding(s);
+    });
+    const getHoverSounding = s => {
+      for (const sounding of s) {
+        if (sounding == soundings[2])
+          return sounding
+      }
+      return undefined;
+    };
+    const plotArea = new WindspeedProfile({
+      hoverLabels: {
+        getHoverSounding
+      }
+    });
+    assert.equal(plotArea._getHoverSounding, getHoverSounding, 'internal getHoverSounding function');
+    soundings.map(s => plotArea.addSounding(s));
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'all visible: hover third sounding');
+    soundings[0].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'first invisible: hover third sounding');
+    soundings[1].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'only third visible: hover third sounding');
+    soundings[2].visible = false;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'no visible sounding');
+    soundings[1].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, undefined, 'only second visible: hover nothing');
+    soundings[2].visible = true;
+    assert.equal(plotArea.hoverLabelsSounding, soundings[2], 'second and third visible: hover third sounding');
+  });
 });
 describe('WindspeedProfile class, import via name', () => {
   it('empty object', () => {