Some analysis of 2010 Christmas East Coast Storm

Yucheng Song

Dec 24,06Z f06 minus Dec 24, 12Z dry energy norm for 850,500 and 200mb

Quite interesting, who has caused the increase there?

Dec 24,06Z f06 minus Dec 24, 12Z 500mb height and wind

These two areas are spotted

Points: if certain phenomenon can’t be resolved by the model physics, then observations at a later time have to be relied up on

Sensitivity calculation

One uncertainty areaNear Texas/MexicoSpotted by ET KF

Initialized on Dec 23,00Z

Propagating

From Richard GrummThis shows the how the error grows with time

If we had a mission on Dec 23/12Z, it would help

The little blob near Texas grows rapidly

Sparse observing network in the South/Mexico