I find it very difficult in determining a storm's direction from the animated image plots. The differing levels of convection between sweeps can be confusing resulting in the perception that the storm's changed direction. A couple of sweeps later and it suddenly appears back on it's original track. Now, whether that's some kind of optical illusion or whether the storm took a little wobble is hard to say, so I suppose it's best to just ignore it and wait for the bigger picture to eventually pan-out.
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Re: Westward motion more than NW?