redout, with respect to the topic of this thread, aircraft movements rather than total passengers is the better gauge. For calendar year 2004, the busiest airport in the world in terms of total aircraft movements was ORD with 992,000.
The first non-US airport to appear in the rankings is CDG ranked 9th; FRA is ranked 14th; LHR is ranked 15th with 475,000 movements; AMS is ranked 20th; BOS is ranked 22nd; and MAD is ranked 24th.
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on topic, I cannot find Meters archived on the Web for June 9th, but the climatological record for KBOS for June 9th reported fog, fog with visibility below a quarter mile, thunder, and haze as the significant weather. Winds were generally 160, peak wind was 15 mph. Precipitation was 0.45 iinch.