What effect will the Iceland Vocanic Dust cloud have on the US weather?

As the ash cloud circumnavigates the Earth, is there anybody out there who can scientifically predict what effect it will have on our summer weather in the U.S. and for the rest of this year, please?What effect will the Iceland Vocanic Dust cloud have on the US weather?
It all depends on what happens. The Ejyafjallaj枚kulll eruption has put a lot of ashes in the sky because it is under a glacier and once the lava mixes with the ice, it creates a steam that rises very high in the sky an drifts long distances, taken by the jet streams.



Right now, the Ejyafjallaj枚kull has melted much of its glacier and, perhaps, we won't see much more high level ashes. As the ice is gone, the volcano works like any other volcano in e.g. Indonesia or Hawaii; much lava is coming out but not so much ash is reaching high up in the atmospher because it doesn't produce steam.



But the other volcano, called Katla, only 2 km from Eyjafjallaj枚kull, is much bigger with a huge glacier on the top. It is due to erupt any time now and that one could cause a lot of problems for the entire northern hemisphere. The worst-case scenario even predicts an breakdown of all satellite communications. It is even said that it was the Katla eruption in 1783 that caused the famine that lead to the French revolution in 1789.What effect will the Iceland Vocanic Dust cloud have on the US weather?
There won't be a huge difference but there will be one. The last large volcanic eruption (Mt St Hellens in 1980) caused the Earth to be about 1 degree (F) cooler. This eruption is about the size of that one.

I can only assume it will be just the same.What effect will the Iceland Vocanic Dust cloud have on the US weather?
particles will block the sun and possibly make our weather cooler
cooler summer and more rain days