Looks like Flagstaff will be on the moisture edge for the next few days. There is very dry air to the west, very wet air to the east. Some days it may cause storms in Flag. Most storms will be to the east and southeast. It does appear the thermal low is starting to build over Baja and Southwestern Arizona.
BUT!!! Check out this new graphical forecast page from the National Weather Service: Graphical Forecast for Flagstaff