The answer is likely not. The distance across the great wide Pacific is something like 5,100 miles. Exactly? I’m really not sure but the point is it’s a LONG way.
If you think about it there was no worry when the US Government dropped a few nukes on Japan back in 1945 during World War II. Did a fallout cloud make it to us? Not reported if so. Also our very own Gov dropped many many bombs in our very own Pacific Ocean and Nevada Deserts back in those days. Again, no one was trippen. Maybe we were not savvy enough to worry or maybe it made no difference.
Another thing is the great wide distance allows for MUCH dissipation along the way so it would be spread thin all over. Also it seems this radioactive fallout material is denser than air and falls to the ground or would be brought down by rain along the way. Again, I’m no scientist and this may not be all that accurate, but just a bunch of stuff I have picked up from reading the interwebs the last few days. So it would indeed drop into the Pacific Ocean before it got to us on the West Coast or San Francisco / Oakland.
But, do we even know the true radiation levels being emitted from Fukushima Nuclear Power Plant in Japan after the 9.0 Earthquake? I think the answer is no, we do not know the true levels. I get this from this article here. U.S. radiation experts try to decipher reports from Japan
If we were to get hit by this fallout cloud here in California, the NYTimes is guessing it will be the 18th or so here in Oakland based on this map. And it looks like Los Angeles is first because of the offshore weather pattern. Fallout forecast.
This is a similar forecast from some foreign weather site.

However, if you’re scared there is a live map you can check here for a current Radiation Count Per Minute based on real time Geiger Counter stations in the US.

This is an old image so please do click the map to see a live map.
I have been watching it the last few days and 22-30 seems about normal for us in the Bay Area.
Also here is the epa.gov Radnet map. it shows so far we’re fine but what the hell happened on March 2nd??? That is HIGH Levels and we never even knew……

So in conclusion, I think we’re safe. Even if it got messy and we did get hit you just stay inside, tape up your windows, eat some ice cream and watch some Netflix. Word.
But if you are really worried buy some pills on eBay or something. I got some on the way, not for this event but for when San Francisco gets Nuked and a real fallout cloud is coming for Oakland.
Helpful links.
Goverment New releases.
Reactor Watchdog Project.
Bay Area Air Quality Index.