Forecast of the Day • A National Weather Forecasting Contest

Wednesday's high temperature forecast in Santa Fe, New Mexico looks interesting. The highs have been about 80 F recently, but the forecast for Wednesday are in the 50's or 60's (10 F below average), despite partly cloudy skies and winds from the south. Let's forecast Tmax and see what happens.

Question: Usually much cooler air results from some kind of cold front, with winds from the north or northwest. So what's happening here; where is the cool air coming from?