It is one unverified, uncorroborated spike to about 85 CPM in Colorado at 4200 feet. The guy who wrote up the report even admits he has limited knowledge about isotopes and his suggestion that it came from Japan in the jet stream is pure speculation. It is much more likely to be a local phenomenon.
However, it is fairly clear that they have increasing problems in Japan. Just today Tepco finally admitted that building #4 is deforming. Walls are bulging. Anyone could have seen that, just by looking at the Tepco camera. They are also experiencing negative pressure somewhere within reactor #4 building. You sometimes see fog/smog being sucked into the building center.