UPDATE: Wed 13 Jan 2009 / 3:00p.m.
The models are consistent in keeping the upper low a bit further south than shown on the map above; this means we'll probably get rain, but heavy amounts are less likely.
Of course, if the low's track changes then the forecast will need to be adjusted accordingly. One of the frustrating features with this low is a location over a data-sparse region which raises the chance of a miss. Stay tuned!
A fairly quiet weather regime with seasonably cold nights and cool days is in the offing through Wednesday, for a change!
The next major weather maker to keep an eye on will be an upper trough. It will be moving along in the southern branch of the jet stream. The map above shows its expected position by Friday.
The models are quite consistent with the placement of this low, and this solution matches up well with the behavior of these systems in this type of pattern.
If this comes to pass, expect rather windy, chilly, and rainy weather (on the north side of this system) as we move into the third weekend of 2010.