Sunday, May 8, 2011

May 9-11 Severe Weather Event: 12z GEFS CAPE values unbelievable (Issued May 8)

TERMS TO KNOW
CAPE- A measure of instability. > 2000 is considered unstable, anything higher than 4000 is considered dangerously unstable.

The 12z GEFS model, which is the ensemble of the GFS model, is painting a disturbing picture. That picture is the chance for CAPE values over 4000, which is rare to start off with.
Below is that chance.
90%+ chance is extremely eye catching, because it signifies that the atmosphere will be much more dangerous than originally thought. More on this later.

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