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ESS124
Prof.
Jin-Yi Yu
East Coast Cyclone:
Mature Phase
• East Coast cyclones
track northeast along
the coast and typically reach their maximum intensity 24-48 hours after the initial development.
•During this phase of the cyclone evolution, the polar and subtropical jetstreams typically merge and propagate northeastward along the east side of the storm.
•The upper-level trough continues to deepen and is eventually filled with cold air transported southward from west of the surface low.
•A cutoff low is formed and eventually filled by the convergence due to surface friction.
•The filling is slower over ocean than over land.