diff --git a/apps/openmw/mwworld/physicssystem.cpp b/apps/openmw/mwworld/physicssystem.cpp
index cf587c5c42..9984633cd6 100644
--- a/apps/openmw/mwworld/physicssystem.cpp
+++ b/apps/openmw/mwworld/physicssystem.cpp
@@ -315,15 +315,22 @@ namespace MWWorld
                     wasOnGround = physicActor->getOnGround(); // store current state
                     tracer.doTrace(colobj, position, position - Ogre::Vector3(0,0,2), engine); // check if down 2 possible
                     if(tracer.mFraction < 1.0f && getSlope(tracer.mPlaneNormal) <= sMaxSlope)
+                    {
                         isOnGround = true;
+                        // if we're on the ground, don't try to fall any more
+                        velocity.z = std::max(0.0f, velocity.z);
+                    }
                 }
             }
 
-            // NOTE: isOnGround was initialised false, so should stay false if falling or sliding horizontally
-            if(isOnGround)
+            // Now that we have the effective movement vector, apply wind forces to it
+            if (MWBase::Environment::get().getWorld()->isInStorm())
             {
-                // if we're on the ground, don't try to fall any more
-                velocity.z = std::max(0.0f, velocity.z); // NOTE: two different velocity assignments above
+                Ogre::Vector3 stormDirection = MWBase::Environment::get().getWorld()->getStormDirection();
+                Ogre::Degree angle = stormDirection.angleBetween(velocity);
+                static const float fStromWalkMult = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>()
+                        .find("fStromWalkMult")->getFloat();
+                velocity *= 1.f-(fStromWalkMult * (angle.valueDegrees()/180.f));
             }
 
             Ogre::Vector3 newPosition = position;
diff --git a/apps/openmw/mwworld/weather.hpp b/apps/openmw/mwworld/weather.hpp
index 3cc58aa4c5..292d06747f 100644
--- a/apps/openmw/mwworld/weather.hpp
+++ b/apps/openmw/mwworld/weather.hpp
@@ -128,10 +128,10 @@ namespace MWWorld
         // Rain sound effect
         std::string mRainLoopSoundID;
 
-        // Is this an ash storm / blight storm? This controls two things:
-        // - The particle node will be oriented so that the particles appear to come from the Red Mountain. (not implemented yet)
+        // Is this an ash storm / blight storm? If so, the following will happen:
+        // - The particles and clouds will be oriented so they appear to come from the Red Mountain.
         // - Characters will animate their hand to protect eyes from the storm when looking in its direction (idlestorm animation)
-        // Possible effect on movement speed?
+        // - Slower movement when walking against the storm (fStromWalkMult)
         bool mIsStorm;
 
         // How fast does rain travel down?