Original: Late on August 13, it was "beginning to look like Irene-junior as it undergoes southwesterly mid-level shear beneath the otherwise favorable upper-level outflow pattern".
Simplified: Late on August 13, a weather forecaster said that it was "beginning to look like Irene-junior". They said this because it was undergoing mid-level shear towards southwest "beneath the otherwise favorable upper-level outflow pattern".