Yellowstone Lake has recently been exhibiting signs of rapid increases of
hydrothermal activity.
http://volcanoes.usgs.gov/yvo/monitoring.html

According to reports there is a bulge under Yellowstone Lake approx 2100
feet long, 1000 feet wide, and 100 feet high. Scientists believe there is
an increased chance of a major hydrothermal explosion.

My question for quantitative-minded meteorologists is this: If Yellowstone
Lake explodes and leaves a 2500 foot crater, venting the steam and carbon
dioxide from under the lake and evaporating some of the lake, will the
resulting sudden cloud cause any significant flooding or other weather
anomalies?

I look forward to the professional opinions based on assumptions of heat
energy released into the atmosphere, total volume of water evaporated and
then condensed, etc.

It would seem to me that a super heated cloud of 100% saturation would
quickly condense but also contain enough moisture to continue condensing for
hundreds if not thousands of miles.

Dave