The low that has been spinning away for a couple of days south of Baja has officially become Tropical Storm Marty this morning. The NHC predicts it to move slowly northward and have a rather brief life as a TS. It will apparently move north of 20N in the area where storms can trigger a Gulf Surge of low-level moisture. If Marty triggers a surge, it would most likely affect Arizona late Friday or Saturday. Thus, there is some possiblity that that the baroclinic cut-off that is sinking southward from the Great Basin into Arizona and Marty could interact, at least distantly. Given the weak character of Marty it is too early to guess exactly how things will evolve by the weekend - but at least there are a couple features of interest drifting around our part of the world.
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