Friday, October 29, 2010

Tropical connections and extratropical mischief

As noted in the previous post, we are about to enter ski Purgatory, but why?

The latest GFS analysis and forecast loop shows that the ridge develops downstream of an explosively developing Pacific cyclone that is fueled in part by subtropical moisture, possibly related to Typhoon Chaba.

The UW WRF forecast progs a central pressure for the Pacific cyclone of 939 mb.  A nice discussion of this event and its potential impacts on the PacNW is available on Cliff Mass' weather blog.

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