diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index cafbd1f987..f1290b9a2a 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -1142,8 +1142,8 @@ namespace OpenSim.Framework
         void SendLayerData(float[] map);
         void SendLayerData(int px, int py, float[] map);
 
-        void SendWindData(Vector2[] windSpeeds);
-        void SendCloudData(float[] cloudCover);
+        void SendWindData(int version, Vector2[] windSpeeds);
+        void SendCloudData(int version, float[] cloudCover);
 
         /// <summary>
         /// Sent when an agent completes its movement into a region.
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index 2d337f1e29..15f1004b39 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -1379,16 +1379,18 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         ///  Send the wind matrix to the client
         /// </summary>
         /// <param name="windSpeeds">16x16 array of wind speeds</param>
+/*
         public virtual void SendWindData(Vector2[] windSpeeds)
         {
             Util.FireAndForget(DoSendWindData, windSpeeds, "LLClientView.SendWindData");
+                DoSendWindData(windSpeeds);
         }
-
+*/
         /// <summary>
         ///  Send the cloud matrix to the client
         /// </summary>
         /// <param name="windSpeeds">16x16 array of cloud densities</param>
-        public virtual void SendCloudData(float[] cloudDensity)
+        public virtual void SendCloudData(int version, float[] cloudDensity)
         {
             Util.FireAndForget(DoSendCloudData, cloudDensity, "LLClientView.SendCloudData");
         }
@@ -1397,9 +1399,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// Send wind layer information to the client.
         /// </summary>
         /// <param name="o"></param>
-        private void DoSendWindData(object o)
+//        private void DoSendWindData(object o)
+        public virtual void SendWindData(int version, Vector2[] windSpeeds)
         {
-            Vector2[] windSpeeds = (Vector2[])o;
+//            Vector2[] windSpeeds = (Vector2[])o;
             TerrainPatch[] patches = new TerrainPatch[2];
             patches[0] = new TerrainPatch { Data = new float[16 * 16] };
             patches[1] = new TerrainPatch { Data = new float[16 * 16] };
diff --git a/OpenSim/Region/CoreModules/World/Cloud/CloudModule.cs b/OpenSim/Region/CoreModules/World/Cloud/CloudModule.cs
index d217f36c7d..f304307586 100644
--- a/OpenSim/Region/CoreModules/World/Cloud/CloudModule.cs
+++ b/OpenSim/Region/CoreModules/World/Cloud/CloudModule.cs
@@ -203,7 +203,7 @@ namespace OpenSim.Region.CoreModules.World
         {
             if (m_ready)
             {
-                client.SendCloudData(cloudCover);
+                client.SendCloudData(0, cloudCover);
             }
         }
 
diff --git a/OpenSim/Region/CoreModules/World/Wind/WindModule.cs b/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
index 9f13d90176..f1de0bc987 100644
--- a/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
+++ b/OpenSim/Region/CoreModules/World/Wind/WindModule.cs
@@ -430,7 +430,7 @@ namespace OpenSim.Region.CoreModules
 
                 m_scene.ForEachRootClient(delegate(IClientAPI client)
                 {
-                    client.SendWindData(windSpeeds);
+                    client.SendWindData(0, windSpeeds);
                 });
                 
                 }
diff --git a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
index 427b48ec73..15d31bddbb 100644
--- a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
+++ b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
@@ -1023,12 +1023,12 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
             
         }
 
-        public void SendWindData(Vector2[] windSpeeds)
+        public void SendWindData(int version, Vector2[] windSpeeds)
         {
             
         }
 
-        public void SendCloudData(float[] cloudCover)
+        public void SendCloudData(int version, float[] cloudCover)
         {
             
         }
diff --git a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
index 07413cfd90..1ad71ba4cc 100644
--- a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
+++ b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
@@ -724,9 +724,9 @@ namespace OpenSim.Region.OptionalModules.World.NPC
         {
         }
 
-        public virtual void SendWindData(Vector2[] windSpeeds) { }
+        public virtual void SendWindData(int version, Vector2[] windSpeeds) { }
 
-        public virtual void SendCloudData(float[] cloudCover) { }
+        public virtual void SendCloudData(int version, float[] cloudCover) { }
 
         public virtual void MoveAgentIntoRegion(RegionInfo regInfo, Vector3 pos, Vector3 look)
         {
diff --git a/OpenSim/Tests/Common/Mock/TestClient.cs b/OpenSim/Tests/Common/Mock/TestClient.cs
index 6a697f24f3..9251c4fcd3 100644
--- a/OpenSim/Tests/Common/Mock/TestClient.cs
+++ b/OpenSim/Tests/Common/Mock/TestClient.cs
@@ -659,9 +659,9 @@ namespace OpenSim.Tests.Common
         {
         }
 
-        public virtual void SendWindData(Vector2[] windSpeeds) { }
+        public virtual void SendWindData(int version, Vector2[] windSpeeds) { }
 
-        public virtual void SendCloudData(float[] cloudCover) { }
+        public virtual void SendCloudData(int version, float[] cloudCover) { }
 
         public virtual void MoveAgentIntoRegion(RegionInfo regInfo, Vector3 pos, Vector3 look)
         {