Above is a water vapor satellite image from 1000 UTC 27 August 2011. Two weather features dominate the continent this early morning - Hurricane Irene brushing the coast of North Carolina and a very large MCS over northwestern Mexico. The Guaymas morning sounding yesterday was extremely unstable with CAPE values of 4000 to 5000 J/kg. Very dry upper-tropospheric air covers the continent between these two features.
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