diff --git a/OpenSim/Region/CoreModules/World/Wind/Plugins/ConfigurableWind.cs b/OpenSim/Region/CoreModules/World/Wind/Plugins/ConfigurableWind.cs
index 6af40507f3..65691fe304 100644
--- a/OpenSim/Region/CoreModules/World/Wind/Plugins/ConfigurableWind.cs
+++ b/OpenSim/Region/CoreModules/World/Wind/Plugins/ConfigurableWind.cs
@@ -103,7 +103,7 @@ namespace OpenSim.Region.CoreModules.World.Wind.Plugins
             }
         }
 
-        public void WindUpdate(uint frame)
+        public bool WindUpdate(uint frame)
         {
             double avgAng = m_avgDirection * (Math.PI/180.0f);
             double varDir = m_varDirection * (Math.PI/180.0f);
@@ -125,10 +125,8 @@ namespace OpenSim.Region.CoreModules.World.Wind.Plugins
             offset = Math.Sin(theta) * Math.Sin(theta*4) + (Math.Sin(theta*13) / 3);
             double windSpeed = m_avgStrength + (m_varStrength * offset);
 
-            if (windSpeed<0) 
-                windSpeed=0;
-
-
+            if (windSpeed < 0) 
+                windSpeed = -windSpeed;
 
             m_curPredominateWind.X = (float)Math.Cos(windDir);
             m_curPredominateWind.Y = (float)Math.Sin(windDir);
@@ -144,6 +142,7 @@ namespace OpenSim.Region.CoreModules.World.Wind.Plugins
                     m_windSpeeds[y * 16 + x] = m_curPredominateWind;
                 }
             }
+            return true;
         }
 
         public Vector3 WindSpeed(float fX, float fY, float fZ)
diff --git a/OpenSim/Region/CoreModules/World/Wind/Plugins/SimpleRandomWind.cs b/OpenSim/Region/CoreModules/World/Wind/Plugins/SimpleRandomWind.cs
index fcb0c10e1b..d2ff7b332d 100644
--- a/OpenSim/Region/CoreModules/World/Wind/Plugins/SimpleRandomWind.cs
+++ b/OpenSim/Region/CoreModules/World/Wind/Plugins/SimpleRandomWind.cs
@@ -82,22 +82,23 @@ namespace OpenSim.Region.CoreModules.World.Wind.Plugins
             }
         }
 
-        public void WindUpdate(uint frame)
+        public bool WindUpdate(uint frame)
         {
             //Make sure our object is valid (we haven't been disposed of yet)
-            if (m_windSpeeds != null)
+            if (m_windSpeeds == null)
+                return false;
+
+            for (int y = 0; y < 16; y++)
             {
-                for (int y = 0; y < 16; y++)
+                for (int x = 0; x < 16; x++)
                 {
-                    for (int x = 0; x < 16; x++)
-                    {
-                        m_windSpeeds[y * 16 + x].X = (float)(m_rndnums.NextDouble() * 2d - 1d); // -1 to 1
-                        m_windSpeeds[y * 16 + x].Y = (float)(m_rndnums.NextDouble() * 2d - 1d); // -1 to 1
-                        m_windSpeeds[y * 16 + x].X *= m_strength;
-                        m_windSpeeds[y * 16 + x].Y *= m_strength;
-                    }
+                    m_windSpeeds[y * 16 + x].X = (float)(m_rndnums.NextDouble() * 2d - 1d); // -1 to 1
+                    m_windSpeeds[y * 16 + x].Y = (float)(m_rndnums.NextDouble() * 2d - 1d); // -1 to 1
+                    m_windSpeeds[y * 16 + x].X *= m_strength;
+                    m_windSpeeds[y * 16 + x].Y *= m_strength;
                 }
             }
+            return true;
         }
 
         public Vector3 WindSpeed(float fX, float fY, float fZ)
diff --git a/OpenSim/Region/CoreModules/World/Wind/WindModule.cs b/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
index 2f401bf2dd..9f13d90176 100644
--- a/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
+++ b/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
@@ -51,6 +51,7 @@ namespace OpenSim.Region.CoreModules
         //private Random m_rndnums = new Random(Environment.TickCount);
         private Scene m_scene = null;
         private bool m_ready = false;
+        private bool m_inUpdate = false;
 
         private bool m_enabled = false;
         private IConfig m_windConfig;
@@ -160,7 +161,7 @@ namespace OpenSim.Region.CoreModules
             m_scene.RegisterModuleInterface<IWindModule>(this);
 
             // Generate initial wind values
-            GenWindPos();
+            GenWind();
 
             // Mark Module Ready for duty
             m_ready = true;
@@ -416,67 +417,63 @@ namespace OpenSim.Region.CoreModules
         /// </summary>
         public void WindUpdate()
         {
-            if (((m_frame++ % m_frameUpdateRate) != 0) || !m_ready)
-            {
+            if ((!m_ready || m_inUpdate || (m_frame++ % m_frameUpdateRate) != 0))
                 return;
-            }
 
-            GenWindPos();
+            m_inUpdate = true;
+            Util.FireAndForget(delegate
+            {
+                try
+                {
+                if(GenWind())
+                    windSpeeds = m_activeWindPlugin.WindLLClientArray();
 
-            SendWindAllClients();
+                m_scene.ForEachRootClient(delegate(IClientAPI client)
+                {
+                    client.SendWindData(windSpeeds);
+                });
+                
+                }
+                finally
+                {
+                    m_inUpdate = false;
+                }
+            },
+            null, "WindModuleUpdate");
         }
 /*
-        public void OnAgentEnteredRegion(ScenePresence avatar)
-        {
-            if (m_ready)
-            {
-                if (m_activeWindPlugin != null)
-                {
-                    // Ask wind plugin to generate a LL wind array to be cached locally
-                    // Try not to update this too often, as it may involve array copies
-                    if (m_frame >= (m_frameLastUpdateClientArray + m_frameUpdateRate))
-                    {
-                        windSpeeds = m_activeWindPlugin.WindLLClientArray();
-                        m_frameLastUpdateClientArray = m_frame;
-                    }
-                }
-
-                avatar.ControllingClient.SendWindData(windSpeeds);
-            }
-        }
-*/
         private void SendWindAllClients()
         {
-            if (m_ready)
-            {
-                if (m_scene.GetRootAgentCount() > 0)
-                {
-                    // Ask wind plugin to generate a LL wind array to be cached locally
-                    // Try not to update this too often, as it may involve array copies
-                    if (m_frame >= (m_frameLastUpdateClientArray + m_frameUpdateRate))
-                    {
-                        windSpeeds = m_activeWindPlugin.WindLLClientArray();
-                        m_frameLastUpdateClientArray = m_frame;
-                    }
+            if (!m_ready || m_scene.GetRootAgentCount() == 0)
+                return;
 
-                    m_scene.ForEachRootClient(delegate(IClientAPI client)
-                    {
-                        client.SendWindData(windSpeeds);
-                    });
-                }
+            // Ask wind plugin to generate a LL wind array to be cached locally
+            // Try not to update this too often, as it may involve array copies
+            if (m_frame >= (m_frameLastUpdateClientArray + m_frameUpdateRate))
+            {
+                windSpeeds = m_activeWindPlugin.WindLLClientArray();
+                m_frameLastUpdateClientArray = m_frame;
             }
+
+            m_scene.ForEachRootClient(delegate(IClientAPI client)
+            {
+                client.SendWindData(windSpeeds);
+            });
         }
+*/
         /// <summary>
-        /// Calculate the sun's orbital position and its velocity.
+        /// Calculate new wind 
+        /// returns false if no change
         /// </summary>
 
-        private void GenWindPos()
+        private bool GenWind()
         {
             if (m_activeWindPlugin != null)
             {
                 // Tell Wind Plugin to update it's wind data
-                m_activeWindPlugin.WindUpdate(m_frame);
+                return m_activeWindPlugin.WindUpdate(m_frame);
             }
+            return false;
         }
     }
 }
diff --git a/OpenSim/Region/Framework/Interfaces/IWindModelPlugin.cs b/OpenSim/Region/Framework/Interfaces/IWindModelPlugin.cs
index 16b6024442..b4bc15c25c 100644
--- a/OpenSim/Region/Framework/Interfaces/IWindModelPlugin.cs
+++ b/OpenSim/Region/Framework/Interfaces/IWindModelPlugin.cs
@@ -53,7 +53,7 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <summary>
         /// Update wind.
         /// </summary>
-        void WindUpdate(uint frame);
+        bool WindUpdate(uint frame);
 
         /// <summary>
         /// Returns the wind vector at the given local region coordinates.